AD7682/AD7689 ࠀీ઀཮

AD7682/AD7689 ࠀీ઀཮
16࿋Ă4/8ཚ‫ڢ‬
250 kPSP PulSAR ADC
AD7682/AD7689
ࠀీ઀཮
༬Ⴀ
ᆌᆩ
‫ܠ‬ཚ‫ڢ‬ဣཥ॔੦
‫ۉࠃ׾ۉ‬ยԢ
ᅅଐᅏഗǖECG/EKG
ᅎ‫ۯ‬ཚ႑ǖGPS
‫ۉ‬૰၍॔੦
ຕ਍֑ण
‫ں‬ኒຕ਍֑णဣཥ
ᅏഗᅏ՗
ࡗ‫ײ‬੦዆
2.3V TO 5.5V
0.5V TO VDD
10μF
REFIN
REF
BAND GAP
REF
VDD
1.8V
VIO TO
VDD
AD7689
TEMP
SENSOR
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
CNV
MUX
16-BIT SAR
ADC
ONE-POLE
LPF
SPI SERIAL
INTERFACE
SCK
SDO
DIN
SEQUENCER
COM
07353-001
16࿋‫ݴ‬Ր୲Ă࿮฿ஓ
4ཚ‫(ڢ‬AD7682)/8ཚ‫(ڢ‬AD7689)‫ܠ‬ୟްᆩഗ
! ੗჋ስ๼෇
! ‫ڇ‬टႠ‫܋ڇ‬๼෇
! ֶ‫ݴ‬๼෇)๑ᆩ֖੊‫*ں‬
! ࿁ມटႠ๼෇
ཾུ໏୲ǖ250 kSPS
INLǖ‫ۆ‬႙ኵ±0.4 LSBLjፌ‫ٷ‬ኵ±1.5 LSB)±23 ppmईFSR*
‫ۯ‬ༀ‫ྷݔ‬ǖ93.8 dB
SINADǖ92.5 dB (20 kHz)
THDǖ−100 dB(20 kHz)
ఇె๼෇‫ྷݔ‬ǖ0 V዁VREFLjVREF੗‫ٳ‬VDD
‫ܠ‬ዖएጚᇸૌ႙
! ాև੗჋ስ‫ڦ‬2.5 Vई4.096 Vएጚᇸ
! ྔև࣐؋एጚᇸ)੗‫ٳ‬4.096 V*
! ྔևएጚᇸ)੗‫ٳ‬VDD*
ాև࿒‫ߌد܈‬ഗ(TEMP)
ཚ‫ڢ‬ႾଚഗLj੗჋ስ‫ڦ‬1ट‫୳ۅ‬հഗLj‫ݏ‬஬ኸ๖ഗ
࿮ୁ຤၍ჽ‫׿‬LjSARॐࠓ
‫ۉڇ‬ᇸ߾ፕǖ2.3 V዁5.5 VLjஇडথ੨‫ۉ‬უǖ1.8 V዁5.5 V
‫ز‬ႜথ੨Ljग़ඹSPIĂMICROWIREĂQSPIࢅDSP
ࠀࡼ
3.5 mW(2.5 V/200 kSPS)
12.5 mW(5 V/250 kSPS)
‫ځ‬ऐ‫ୁۉ‬ǖ50 nA
༵ࠃ‫ׯگ‬Ԩ‫ڪ‬पׂ೗
20ᆅগ4 mm × 4 mm LFCSP‫ހ‬ጎ
0.5V TO VDD – 0.5V
0.1μF
GND
཮2/!
՗1. ‫ܠ‬ཚ‫ڢ‬14/16࿋PulSAR® ADC
ૌ႙
14-Bit
16-Bit
16-Bit
ཚ‫ڢ‬ຕ
8
4
8
250 kSPS
AD7949
AD7682
AD7689
500 kSPS
AD7699
ADCൻ‫ۯ‬ഗ
ADA4841-x
ADA4841-x
ADA4841-x
߁ຎ!
AD7682/AD7689๟4/8ཚ‫ڢ‬Ă16࿋Ă‫ࢁۉ‬ም‫ݴ‬ದደْ԰ৎस
٪ഗ(SAR)႙ఇຕገ࣑ഗ(ADC)Lj֑ᆩ‫ۉڇ‬ᇸVDDࠃ‫ۉ‬ă
AD7682/AD7689ᆛᆶ‫ܠ‬ཚ‫ڢ‬Ă‫ࡼࠀگ‬ຕ਍֑णဣཥ໯Ⴔ‫ڦ‬
໯ᆶፇ‫ׯ‬և‫ݴ‬LjԈઔǖ࿮฿ஓ‫ڦ‬ኈ16࿋SAR ADCǗᆩᇀॽ
๼෇ದዃྺ‫܋ڇ‬๼෇)๑ᆩईփ๑ᆩ֖੊‫*ں‬Ăֶ‫ݴ‬๼෇ई
ມटႠ๼෇‫ڦ‬4ཚ‫(ڢ‬AD7682)ई8ཚ‫(ڢ‬AD7689)‫زگ‬ඡ‫ܠ‬ୟ
ްᆩഗǗాև‫گ‬೏ᅎएጚᇸ)੗ᅜ჋ስ2.5 Vई4.096 V*ࢅ࣐
؋ഗǗ࿒‫ߌد܈‬ഗǗ੗჋ስ‫ڇڦ‬ट‫୳ۅ‬հഗǗᅜत‫ܠړ‬ཚ
‫ڢ‬ᅈْ૶Ⴤ֑ᄣ้‫׉ݥ‬ᆶᆩ‫ڦ‬Ⴞଚഗă
AD7682/AD7689๑ᆩ०‫ڦڇ‬SPIথ੨ํ၄ದዃस٪ഗ‫ڦ‬ႀ
෇ࢅገ࣑঳ࡕ‫ڦ‬থ๭ăSPIথ੨๑ᆩ‫ۉڦ܀ڇ‬ᇸ(VIO)Lj໲
ԥยۨྺዷऐஇड‫ۉ‬ೝăࠀࡼᇑཾུ໏୲‫ׯ‬ኟԲă
AD7682/AD7689֑ᆩၭ႙20ᆅগLFCSP‫ހ‬ጎLj߾ፕ࿒‫ݔ܈‬
ྷྺ−40°C዁+85°Că
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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ADIዐ࿔Ӳຕ਍๮֩๟ᆈ࿔Ӳຕ਍๮֩‫ڦ‬ᅳ࿔Lj৤൩ଌ঴‫݋‬ᅳዐ੗ీ٪ሞ‫ڦ‬ᇕჾፇኯई‫݋‬ᅳ‫ٱ‬ဃLjADIփ‫݋ܔ‬ᅳዐ٪ሞ‫ֶڦ‬ᅴईᆯׂُิ‫ٱڦ‬ဃ޶ሴăසႴඓණඪࢆَᇕ‫ڦ‬ጚඓႠLj൩֖੊ADI༵ࠃ
‫ڦ‬ፌႎᆈ࿔Ӳຕ਍๮֩ă
AD7682/AD7689
ణ୤!
༬Ⴀ ................................................................................................... 1
!
एጚ‫ۉ‬უ๼‫؜‬/๼෇ ............................................................ 20
ᆌᆩ ................................................................................................... 1
!
‫ۉ‬ᇸ ........................................................................................ 22
ࠀీ઀཮ ........................................................................................... 1
!
ٗएጚᇸྺADCࠃ‫ ۉ‬........................................................ 22
߁ຎ ................................................................................................... 1
ຕጴথ੨ ........................................................................................ 23
Ⴊ۩૦๏ ........................................................................................... 2
!
ገ࣑೺क़‫܁‬ൽ/ႀ෇Lj੺໏ዷऐ ....................................... 23
रຍࡀ߭ ........................................................................................... 3
!
ገ࣑ࢫ‫܁‬ൽ/ႀ෇Ljඪࢆ໏‫ڦ܈‬ዷऐ .............................. 23
!
้Ⴞࡀ߭ .................................................................................. 6
!
ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇Ljඪࢆ໏‫ڦ܈‬ዷऐ .......................... 23
ਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ ............................................................................. 8
!
ದዃस٪ഗLjCFG .............................................................. 23
ESDয়ߢ .................................................................................. 8
!
࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ ................................................ 25
ᆅগದዃࢅࠀీ௮ຎ ..................................................................... 9
!
ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ ................................................ 26
‫ۆ‬႙߾ፕ༬Ⴀ ................................................................................ 11
!
ཚ‫ڢ‬Ⴞଚഗ ........................................................................... 27
ຍᇕ ................................................................................................. 14
!
࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇ .............................. 28
߾ፕᇱ૙ ....................................................................................... 15
!
ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇ .............................. 29
!
߁ຎ ........................................................................................ 15
ᆌᆩႷኪ ........................................................................................ 30
!
ገ࣑ഗ֡ፕ ........................................................................... 15
!
!
‫ࡧڿد‬ຕ ................................................................................ 16
AD7682/AD7689Ⴀీೠࠚ ................................................. 30
!
‫ۆ‬႙૶থ཮ ............................................................................ 17
ྔႚ؅٫ ........................................................................................ 31
!
ఇె๼෇ ................................................................................ 18
!
!
ൻ‫ٷݣۯ‬ഗ჋ስ ................................................................... 20
քਆք၍ ............................................................................... 30
۩ࠔኸళ ................................................................................ 31
Ⴊ۩૦๏!
2009౎6ሆ—Ⴊ۩ӲA዁Ⴊ۩ӲB
߸߀՗6
...................................................................
ሺे཮31ǗዘႎಇႾ .................................................................. 20
8
߸߀“ྔևएጚ‫ۉ‬უᇸࢅాև࣐؋ഗ”և‫ݴ‬त“ྔևएጚ‫ۉ‬უ
߸߀཮37
...................................................................
25
ᇸ”և‫ ݴ‬........................................................................................... 21
߸߀཮38
...................................................................
26
ሺे཮32ࢅ཮33 ............................................................................ 21
2009౎3ሆ—Ⴊ۩Ӳ0዁Ⴊ۩ӲA
߸߀“‫ۉ‬ᇸ”և‫ ݴ‬............................................................................ 22
߸߀“༬Ⴀ”և‫ݴ‬Ă“ᆌᆩ”և‫཮ࢅݴ‬1 .......................................... 1
߸߀“ຕጴথ੨”և‫ݴ‬Ă“ገ࣑ࢫ‫܁‬ൽ/ႀ෇Ljඪࢆ໏‫ڦ܈‬ዷ
ሺे՗2ǗዘႎಇႾ ...................................................................... 3
ऐ”և‫“ࢅݴ‬ದዃस٪ഗLjCFG”և‫ ݴ‬....................................... 23
VREF߸߀ྺVREF ............................................................................. 4
߸߀՗10 ......................................................................................... 24
߸߀՗3 ............................................................................................ 5
ሺे“࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ”և‫཮ࢅݴ‬37 ...................... 25
߸߀՗4 ........................................................................................... 6
ሺे“ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ”և‫཮ࢅݴ‬38 ....................... 26
߸߀՗5 ............................................................................................ 7
ሺे“ཚ‫ڢ‬Ⴞଚഗ”և‫཮ࢅݴ‬39 ................................................. 27
෸‫أ‬՗6‫ڦ‬࿂ጀ2 ............................................................................. 8
߸ ߀ “࿮ ‫ ݏ‬஬ ኸ ๖ ഗ ‫ ڦ‬ገ ࣑ ඇ ‫ ܁ ײ‬ൽ /ႀ ෇ ”
߸߀཮4Ă཮5ࢅ՗7 ....................................................................... 9
և‫཮ࢅݴ‬41 ................................................................................... 28
߸߀཮6Ă཮9ࢅ཮10 ................................................................... 11
߸ ߀ “ࡤ ࿮ ‫ ݏ‬஬ ኸ ๖ ഗ ‫ ڦ‬ገ ࣑ ඇ ‫ ܁ ײ‬ൽ /ႀ ෇ ”
߸߀཮22 ......................................................................................... 13
և‫཮ࢅݴ‬43 ................................................................................... 29
߸߀“߁ຎ”և‫“ࢅݴ‬ገ࣑ഗ֡ፕ”և‫ ݴ‬...................................... 15
߸߀“AD7682/AD7689Ⴀీೠࠚ”և‫ ݴ‬..................................... 30
߸߀՗8 ........................................................................................... 16
“ྔႚ؅٫”և‫ݴ‬ዐሺे஋୞ࡰಎጀ๥ ..................................... 31
߸߀཮26ࢅ཮27 ............................................................................ 17
߸߀۩ࠔኸళ ................................................................................ 31
߸߀“ມटႠ‫ۉڇ‬ᇸ”և‫“ࢅݴ‬ఇె๼෇”և‫ ݴ‬........................ 18
߸߀“ాևएጚ‫ۉ‬უᇸ/࿒‫ߌد܈‬ഗ”և‫ ݴ‬............................... 20
2008౎5ሆ—Ⴊ۩Ӳ0ǖ‫؛‬๔Ӳ
Rev. B | Page 2 of 32
AD7682/AD7689
रຍࡀ߭!
‫ݥأ‬ଷᆶຫ௽LjVDD = 2.3 V዁5.5 VLjVIO = 1.8 V዁VDDLjVREF = VDDLj໯ᆶࡀ߭਩၎‫ܔ‬ᇀTMIN዁TMAXܸჾă
՗2
֖ຕ!
RESOLUTION
ఇె๼෇
! ‫ۉ‬უ‫ྷݔ‬
! ਨ‫ܔ‬๼෇‫ۉ‬უ
ཉॲ0ጀ๥!
ፌၭኵ!
16
‫ڇ‬टႠఇ๕
ມटႠఇ๕
0
−VREF/2
−0.1
ኟ๼෇Lj‫ڇ‬टႠࢅ
ມटႠఇ๕
−0.1
޶ईCOM๼෇,‫ڇ‬टႠఇ๕
޶ईCOM๼෇,ມटႠఇ๕
VREF/2 − 0.1
! ఇె๼෇CMRR
25°C้୑‫ୁۉ‬
! ๼෇ፆੇ1
ཾུ໏୲
! ገ࣑໏୲
! ! ඇ‫੻ټ‬2
¼‫੻ټ‬2
! ຨༀၚᆌ
৛‫܈‬
࿮฿ஓ
ओ‫ݥݴ‬၍Ⴀဃֶ
ྲ‫ݥݴ‬၍Ⴀဃֶ
ሂദሯำ
ሺᅮဃֶ4
ሺᅮဃֶ೅ದ
ሺᅮဃֶ࿒೏
฿ۙဃֶ4
฿ۙဃֶ೅ದ
฿ۙဃֶ࿒೏
‫ۉ‬ᇸଳ௺‫܈‬
঍ୁ৛‫܈‬5
‫ۯ‬ༀ‫ྷݔ‬
႑ሯԲ
SINAD
fIN= 250 kHz
֑ण঩܎
VDD = 4.5 V ዁ 5.5 V
VDD = 2.3 V ዁ 4.5 V
VDD = 4.5 V ዁ 5.5 V
VDD = 2.3 V ዁ 4.5 V
AD7689A
‫ۆ‬႙ኵ! ፌ‫ٷ‬ኵ
VREF/2
0
0
0
0
0
−VREF/2
−0.1
+VREF
+VREF/2
VREF + 0.1
V
+0.1
−0.1
+0.1
V
VREF/2 + 0.1
VREF/2 − 0.
1
VREF/2 + 0.1
V
+4
16
−1.5
−1
+32
−8
−4
+32
−8
±2
±1
−32
±32
±2
±1
±1.5
V
dB
nA
250
200
62.5
50
1.8
kSPS
kSPS
kSPS
kSPS
14.5
0.6
−32
fIN = 20 kHz, VREF = 5 V
fIN = 20 kHz, VREF = 4.096 V,
ాև REF
fIN = 20 kHz, VREF = 2.5 V,
ాև REF
fIN = 20 kHz, VREF = 5 V
fIN = 20 kHz, VREF = 5 V,
−60 dB ๼෇
fIN = 20 kHz, VREF = 4.096 V
ాև REF
fIN = 20 kHz, VREF = 2.5 V
ాև REF
0
0
0
0
14.5
REF = VDD = 5 V
VDD = 5 V ± 5%
VREF/2
68
1
250
200
62.5
50
1.8
15
−4
‫ڇ‬࿋
Bits
+VREF
+VREF/2
VREF + 0.1
68
1
஢ଉ‫ײ‬঩ሂLjඇ‫!੻ټ‬
஢ଉ‫ײ‬঩ሂLj¼‫!੻ټ‬
VDD = 4.5 V ዁ 5.5 V
VDD = 2.3 V ዁ 4.5 V
AD7682B/AD7689B
ፌၭኵ!
‫ۆ‬႙ኵ! ፌ‫ٷ‬ኵ
16
−4
±0.4
±0.25
0.5
±1
±0.5
±1
±1
±5
±0.5
±1
±1.5
+1.5
+1.5
+8
+4
+8
+4
Bits
LSB 3
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
LSB
ppm/°C
LSB
90.5
90
89
92.5
91
93.8
93.5
92.3
dB 6
dB
dB
86
87.5
88.8
dB
89
30.5
91
92.5
33.5
dB
dB
88
90
91
dB
86
87
88.4
dB
Rev. B | Page 3 of 32
AD7682/AD7689
֖ຕ!
2
3
4
5
6
AD7682B/AD7689B
ፌၭኵ!
‫ۆ‬႙ኵ! ፌ‫ٷ‬ኵ
−100
ጺၿհ฿ኈ(THD)
࿮ሗො‫ۯ‬ༀ‫ྷݔ‬
fIN = 20 kHz
105
110
dB
fIN = 100 kHz
−120
−125
dB
1.7
0.425
2.5
1.7
0.425
2.5
MHz
MHz
ns
֑ᄣ‫ۯ‬ༀႠీ
-3 dB๼෇‫੻ټ‬
ତ‫ڢ‬
ඇ‫੻ټ‬
¼‫੻ټ‬
! ੥০ჽ‫׿‬
VDD = 5 V
ፌၭኵ!
AD7689A
‫ۆ‬႙ኵ! ፌ‫ٷ‬ኵ
−97
ཉॲ0ጀ๥!
fIN = 20 kHz
ཚ‫ڢ‬क़‫ز‬ඡ
1
֖९“ఇె๼෇”և‫ݴ‬
‫੻ټ‬ሞದዃस٪ഗዐยዃă
LSB՗๖ፌ‫گ‬ᆶၳ࿋ă5 V๼෇‫้ྷݔ‬Lj1 LSB = 76.3 μVă
֖९“ຍᇕ”և‫ݴ‬ăኄၵࡀ߭Ԉઔኝ߲࿒‫ڦాྷݔ܈‬հ‫ۯ‬Lj‫ڍ‬փԈઔྔևएጚ‫ۉ‬უ‫ڦ‬ဃֶࠋ၅ă
‫ݥأ‬ଷᆶຫ௽LjVDD = 5 Vă
‫ݥأ‬ଷᆶຫ௽Lj໯ᆶᆩ‫ݴ‬Ԟ(dB)՗๖‫߭ࡀڦ‬਩֖੊஢ଉ‫ײ‬๼෇FSRLjժᆩ‫گ‬ᇀ஢ଉ‫ײ‬0.5 dB‫ڦ‬๼෇႑ࡽ৊ႜ֪๬ă
Rev. B | Page 4 of 32
‫ڇ‬࿋
dB
AD7682/AD7689
‫ݥأ‬ଷᆶຫ௽LjVDD = 2.3 V዁5.5 VLjVIO = 1.8 V዁VDDLjVREF = VDDLj໯ᆶࡀ߭਩၎‫ܔ‬ᇀTMIN዁TMAXܸჾă
՗3
֖ຕ!
ాևएጚ‫ۉ‬უᇸ
REF๼‫ۉ؜‬უ
REFIN๼‫ۉ؜‬უ1
!
!
!
!
REF๼‫ୁۉ؜‬
࿒‫܈‬೏ᅎ
๼෇‫ۉ‬უۙኝ୲
‫׊‬೺೏ᅎ
ਸഔॺ૬้क़
ྔևएጚ‫ۉ‬უᇸ
! ‫ۉ‬უ‫ྷݔ‬
! ୑‫ୁۉ‬2
࿒‫ߌد܈‬ഗ
๼‫ۉ؜‬უ3
࿒‫܈‬ଳ௺‫܈‬
ຕጴ๼෇
! இड‫ۉ‬ೝ
VIL
VIH
IIL
IIH
ຕጴ๼‫؜‬
! ຕ਍߭๕4
! ୁ຤၍ჽ‫׿‬5
VOL
VOH
‫ۉ‬ᇸ
VDD
VIO
! ‫ځ‬ऐ‫ୁۉ‬6,7
! ࠀࡼ
ཉॲ0ጀ๥!
ፌၭኵ!
2.5 V, @ 25°C
4.096 V, @ 25°C
2.5 V, @ 25°C
4.096 V, @ 25°C
2.490
4.086
VDD = 5 V ± 5%
1000 ၭ้!
CREF = 10 μF
REF ๼෇!
REFIN ๼෇)࣐؋*!
250 kSPS, REF = 5 V
໯ᆶ႙ࡽ/‫ڪ‬प
‫ۆ‬႙ኵ ፌ‫ٷ‬ኵ
2.500
4.096
1.2
2.3
±300
±10
±15
50
5
2.510
4.106
V
V
V
V
μA
ppm/°C
ppm/V
ppm
ms
VDD + 0.3
VDD − 0.5
50
V
V
μA
283
1
mV
mV/°C
0.5
0.5
@ 25°C
−0.3
0.7 × VIO
−1
−1
ISINK = +500 μA
ISOURCE = −500 μA
+0.3 × VIO
VIO + 0.3
+1
+1
V
V
μA
μA
0.4
V
V
5.5
VDD + 0.3
V
V
nA
μW
mW
mW
mW
nJ
VIO − 0.3
2.3
1.8
! ௅ْገ࣑‫ీڦ‬ଉ
‫ۨܮ‬Ⴀీ
‫ۨܮ‬Ⴀీ
VDDࢅVIO = 5 VLj25°C
VDD = 2.5 VLj100 SPSཾུ໏୲
VDD = 2.5 VLj200 kSPSཾུ໏୲
VDD = 5 VLj250 kSPSཾུ໏୲
VDD = 5 VLj250 kSPSཾུ໏୲Ljాևएጚᇸ
VDD = 5V
࿒‫ྷݔ܈‬8
‫ۨܮ‬Ⴀీ
TMIN ዁ TMAX
−40
ాև‫ټ‬ဤएጚ‫ۉ‬უᇸ‫ڦ‬๼‫؜‬ă
ೝ਩‫ୁۉ‬Ljᇑཾུ໏୲‫ׯ‬ኟԲă
3
ాև๼‫ۉ؜‬უLj‫؜‬၄ሞጆᆩ‫ܠ‬ୟްᆩഗ๼෇ă
4
‫ڇ‬टႠఇ๕ǖ‫ز‬ႜ16࿋኱থܾ৊዆ă
! ມटႠఇ๕ǖ‫ز‬ႜ16࿋ܾ৊዆ցஓă
5
ገ࣑ྜ‫ࢫׯ‬ገ࣑঳ࡕ૬न੗ᆩă
6
ߵ਍ႴᄲLj໯ᆶຕጴ๼෇ഽ዆থVIOईGNDă
7
ሞ֑ण঩܎ă
8
߸੻࿒‫ྷݔ܈‬൩૴ဣADIࠅິၨ๳‫پ‬՗ă
1
2
Rev. B | Page 5 of 32
‫ڇ‬࿋!
50
1.7
3.5
12.5
15.5
60
18
21
+85
°C
AD7682/AD7689
้Ⴞࡀ߭
‫ݥأ‬ଷᆶຫ௽LjVDD = 4.5 V዁5.5 VLjVIO = 1.8 V዁VDDLj໯ᆶࡀ߭਩၎‫ܔ‬ᇀTMIN዁TMAXܸჾă
՗4.
֖ຕ1
ገ้࣑क़ǖCNVฉืᄂ዁ຕ਍੗ᆩ
֑ण้क़
ገ࣑क़้߰क़
ገ࣑೺क़ຕ਍ႀ෇/‫܁‬ൽ
CNVஞ؋੻‫܈‬
SCKዜ೺
SCK‫ۉگ‬ೝ้क़
SCKߛ‫ۉ‬ೝ้क़
SCKူইᄂ዁ຕ਍ධ඗ᆶၳ
SCKူইᄂ዁ຕ਍ᆶၳჽ‫้׿‬क़
VIOߛᇀ2.7 V
VIOߛᇀ2.3 V
VIOߛᇀ1.8 V
CNV‫ۉگ‬ೝ዁SDO D15 MSBᆶၳ
VIOߛᇀ2.7 V
VIOߛᇀ2.3 V
VIOߛᇀ1.8 V
CNVߛ‫ۉ‬ೝईፌࢫᅃ߲SCKူইᄂ዁SDOߛፆༀ
CNV‫ۉگ‬ೝ዁SCKฉืᄂ
SCKฉืᄂ዁DINᆶၳยዃ้क़
SCKฉืᄂ዁DINᆶၳԍ‫้׼‬क़
1
‫ࡽޙ‬
tCONV
tACQ
tCYC
tDATA
tCNVH
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
ፌၭኵ
‫ۆ‬႙ኵ
ፌ‫ٷ‬ኵ
2.2
1.8
4.0
1.2
10
tDSDO + 2
11
11
4
‫ڇ‬࿋
μs
μs
μs
μs
ns
ns
ns
ns
ns
18
23
28
ns
ns
ns
18
22
25
32
ns
ns
ns
ns
ns
ns
ns
tEN
tDIS
tCLSCK
tSDIN
tHDIN
޶ሜཉॲ֖९཮2ࢅ཮3ă
Rev. B | Page 6 of 32
10
5
5
AD7682/AD7689
‫ݥأ‬ଷᆶຫ௽LjVDD = 2.3 V዁4.5 VLjVIO = 1.8 V዁VDDLj໯ᆶࡀ߭਩၎‫ܔ‬ᇀTMIN዁TMAXܸჾă
Table 5.
֖ຕ1
ገ้࣑क़ǖCNVฉืᄂ዁ຕ਍੗ᆩ
֑ण้क़
ገ࣑क़้߰क़
ገ࣑೺क़ຕ਍ႀ෇/‫܁‬ൽ
CNVஞ؋੻‫܈‬
SCKዜ೺
SCK‫ۉگ‬ೝ้क़
SCKߛ‫ۉ‬ೝ้क़
SCKူইᄂ዁ຕ਍ධ඗ᆶၳ
SCKူইᄂ዁ຕ਍ᆶၳჽ‫้׿‬क़
VIOߛᇀ3 V
VIOߛᇀ2.7 V
VIOߛᇀ2.3 V
VIOߛᇀ1.8 V
CNV‫ۉگ‬ೝ዁SDO D15 MSBᆶၳ
VIOߛᇀ3 V
VIOߛᇀ2.7 V
VIOߛᇀ2.3 V
VIOߛᇀ1.8 V
CNVߛ‫ۉ‬ೝईፌࢫᅃ߲SCKူইᄂ዁SDOߛፆༀ
CNV‫ۉگ‬ೝ዁SCKฉืᄂ
SCKฉืᄂ዁DINᆶၳยዃ้क़
SCKฉืᄂ዁DINᆶၳԍ‫้׼‬क़
ፌၭኵ
ፌ‫ٷ‬ኵ
3.2
1.2
10
tDSDO + 2
12
12
5
‫ڇ‬࿋
μs
μs
μs
μs
ns
ns
ns
ns
ns
24
30
38
48
ns
ns
ns
ns
21
27
35
45
50
ns
ns
ns
ns
ns
ns
ns
ns
tEN
tDIS
tCLSCK
tSDIN
tHDIN
10
5
5
޶ሜཉॲ֖९཮2ࢅ཮3ă
500μA
IOL
1.4V
TO SDO
CL
50pF
500μA
IOH
཮2.ຕጴথ੨้Ⴞ‫޶ڦ‬ሜ‫ۉ‬ୟ
70% VIO
30% VIO
tDELAY
2V OR VIO – 0.5V1
2V OR VIO – 0.5V1
0.8V OR 0.5V2
0.8V OR 0.5V2
2V IF VIO ABOVE 2.5V, VIO – 0.5V IF VIO BELOW 2.5V.
0.8V IF VIO ABOVE 2.5V, 0.5V IF VIO BELOW 2.5V.
཮3.้Ⴞ‫ۉڦ‬ೝ
Rev. B | Page 7 of 32
07353-003
tDELAY
1
2
‫ۆ‬႙ኵ
1.8
5
07353-002
1
‫ࡽޙ‬
tCONV
tACQ
tCYC
tDATA
tCNVH
tSCK
tSCKL
tSCKH
tHSDO
tDSDO
AD7682/AD7689
ਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ!
՗6
֖ຕ
ఇె๼෇
INx1ĂCOM1
REFĂREFIN
‫ۉ‬ᇸ‫ۉ‬უ
VDDĂVIO዁GND
VIO዁VDD
DINĂCNVĂSCK዁GND
SDO዁GND
٪‫ئ‬࿒‫ྷݔ܈‬
঳࿒
θJAඤፆ(LFCSP)
θJCඤፆ(LFCSP)
1
‫ۨܮ‬ኵ
GND − 0.3 V ዁ VDD + 0.3 V
ई VDD ± 130 mA
GND − 0.3 V ዁ VDD + 0.3 V
−0.3 V ዁ +7 V
−0.3 V ዁ VDD + 0.3 V
−0.3 V ዁ VIO + 0.3 V
−0.3 V ዁ VIO + 0.3 V
−65°C ዁ +150°C
150°C
47.6°C/W
4.4°C/W
ጀᅪLj‫؜ג‬ฉຎਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵ੗ీࣷ‫ڞ‬ዂഗॲᆦ৳Ⴀ໦
࣋ăኄၵኻ๟ፌ‫ۨܮٷ‬ኵLjփ՗๖ሞኄၵཉॲူईኁሞඪ
ࢆഄ໲‫؜ג‬Ԩरຍࡀ߭֡ፕև‫ݴ‬໯๖ࡀ߭‫ڦ‬ཉॲူLjഗॲ
ీࠕኟ‫߾׉‬ፕă‫׊‬೺ሞਨ‫ܔ‬ፌ‫ۨܮٷ‬ኵཉॲူ߾ፕࣷᆖၚ
ഗॲ‫ڦ‬੗੍Ⴀă
ESDয়ߢ
ESD(ৢ‫ߌ௺)ۉݣۉ‬ഗॲă
‫ۉټ‬ഗॲࢅ‫ۉ‬ୟӱ੗ీࣷሞுᆶִਥ‫ڦ‬൧઄ူ‫ݣ‬
‫ۉ‬ă৑࠶Ԩׂ೗ਏᆶጆ૧ईጆᆶԍࢺ‫ۉ‬ୟLj‫ڍ‬ሞ
ᇜ‫ీߛڟ‬ଉESD้Ljഗॲ੗ీࣷ໦࣋ăᅺُLjᆌ
‫֑ړ‬ൽ๢‫ڦړ‬ESD‫ٯݔݞ‬แLjᅜՆ௨ഗॲႠీူ
ইईࠀీෟ฿ă
֖९Đఇె๼෇đև‫ݴ‬
Rev. B | Page 8 of 32
AD7682/AD7689
20
19
18
17
16
20
19
18
17
16
VDD
IN3
IN2
IN1
IN0
VDD
NC
IN1
NC
IN0
ᆅগದዃࢅࠀీ௮ຎ!
PIN 1
INDICATOR
AD7682
TOP VIEW
(Not to Scale)
15 VIO
14 SDO
13 SCK
12 DIN
11 CNV
VDD
REF
REFIN
GND
GND
PIN 1
INDICATOR
AD7689
VIO
SDO
SCK
DIN
CNV
IN4 6
IN5 7
IN6 8
IN7 9
COM 10
TOP VIEW
(Not to Scale)
15
14
13
12
11
NOTES
1. THE EXPOSED PAD IS NOT CONNECTED
INTERNALLY. FOR INCREASED
RELIABILITY OF THE SOLDER JOINTS, IT
IS RECOMMENDED THAT THE PAD BE
SOLDERED TO THE SYSTEM
GROUND PLANE.
07353-004
NOTES
1. NC = NO CONNECT.
2. THE EXPOSED PAD IS NOT CONNECTED
INTERNALLY. FOR INCREASED
RELIABILITY OF THE SOLDER JOINTS, IT
IS RECOMMENDED THAT THE PAD BE
SOLDERED TO THE SYSTEM
GROUND PLANE.
1
2
3
4
5
཮4. AD7682ᆅগದዃ
07353-005
1
2
3
4
5
NC 6
IN2 7
NC 8
IN3 9
COM 10
VDD
REF
REFIN
GND
GND
཮5. AD7689ᆅগದዃ
՗7. ᆅগࠀీ௮ຎ
ᆅগ
Պࡽ
1, 20
AD7682
ᆅগఁ‫׬‬
VDD
AD7689
ᆅগఁ‫׬‬
VDD
ૌ႙1
P
௮ຎ
‫ۉ‬ᇸă๑ᆩྔևएጚᇸժཚࡗ10 μFࢅ100 nF‫ۉ‬ඹඁ้᳘LjՔ‫׬‬ኵྺ2.5 V዁5.5 Vă
๑ᆩాևएጚᇸ༵ࠃ2.5 V๼‫؜‬Ljፌၭኵᆌྺ3.0 Vă
๑ᆩాևएጚᇸ༵ࠃ4.096 V๼‫؜‬Ljፌၭኵᆌྺ4.6 Vă
2
REF
REF
AI/O
एጚ‫ۉ‬უ๼෇/๼‫؜‬ă֖९“एጚ‫ۉ‬უ๼‫؜‬/๼෇”և‫ݴ‬ă
๑ీాևएጚᇸ้Ljُᆅগׂิᅃ߲2.5 Vई4.096 V੗჋‫ڦ‬ဣཥएጚ‫ۉ‬უă্ᆩాևए
ጚᇸժ๑ీ࣐؋ഗ้LjREFׂิREFINᆅগ(ፌ‫ٷ‬ኵVDD − 0.5 V)ฉ‫ۉڦ‬უ‫ڦ‬ᅃ߲࣐؋ႚ๕
‫ۉ‬უLj๢ᆩᇀ๑ᆩ‫ׯگ‬ԨĂ‫ࡼࠀگ‬एጚᇸ‫ڦ‬൧઄ă
ྺ߀฀೏ᅎႠీLjᆌॽᅃ߲৛௢एጚᇸ૶থ‫ڟ‬REF(0.5 V዁VDD)ă
࿮ஃ๑ᆩࢆዖएጚᇸLjُᆅগ‫ۼ‬Ⴔᄲཚࡗᅃ߲10 μF‫ۉ‬ඹඁ᳘Ljඁ᳘‫ۉ‬ඹᆌ৑੗ీ੍ৎ
REFă֖९“एጚ‫ۉ‬უᇸඁ᳘”և‫ݴ‬ă
3
REFIN
REFIN
AI/O
ాևएጚ‫ۉ‬უ๼‫؜‬/एጚ‫ۉ‬უ࣐؋๼෇ă֖९“एጚ‫ۉ‬უ๼‫؜‬/๼෇”և‫ݴ‬ă
๑ᆩాևएጚᇸ้Ljాև٪ሞ࿮࣐؋एጚ‫ۉ‬უLjժႴᄲཚࡗᅃ߲0.1 μF‫ۉ‬ඹඁ᳘ă
๑ీాևएጚ‫ۉ‬უ࣐؋ഗ้Ljแेᅃ߲0.5 V዁(VDD − 0.5 V)‫ڦ‬एጚᇸLjঢ়ࡗ࣐؋ࢫ༵
ࠃߴREFᆅগLj९REFᆅগ௮ຎă
4, 5
6
GND
NC
GND
IN4
P
AI
7
IN2
IN5
AI
8
NC
IN6
AI
9
IN3
IN7
AI
10
COM
COM
AI
‫ۉ‬ᇸ‫ں‬ă
AD7682ǖփ૶থă
AD7689ǖఇె๼෇ཚ‫ڢ‬4ă
AD7682ǖఇె๼෇ཚ‫ڢ‬2ă
AD7689ǖఇె๼෇ཚ‫ڢ‬5ă
AD7682ǖփ૶থă
AD7689ǖఇె๼෇ཚ‫ڢ‬6ă
AD7682ǖఇె๼෇ཚ‫ڢ‬3ă
AD7689ǖఇె๼෇ཚ‫ڢ‬7ă
ࠌఇཚ‫ڢ‬๼෇ă໯ᆶ๼෇ཚ‫(ڢ‬IN[7:0])‫ۼ‬੗ᅜ֖੊ᅃ߲0 VईVREF/2 V‫ࠌڦ‬ఇ‫ۅ‬ă
11
CNV
CNV
DI
12
DIN
DIN
DI
13
SCK
SCK
DI
ገ࣑๼෇ăሞฉืᄂLjCNVഔ‫ۯ‬ገ࣑ăገ࣑೺क़LjසࡕCNVԍ‫ۉگ׼‬ೝLjሶ‫ݏ‬஬ኸ๖ഗ
๑ీă
ຕ਍๼෇ăُ๼෇ᆩᇀႀ෇14࿋ದዃस٪ഗă੗ᅜሞገ࣑೺क़ࢅገ࣑ࢫႀ෇ದዃस٪
ഗă
‫ز‬ႜຕ਍้ዓ๼෇ăُ๼෇ᆩᇀྺᅜMSBᆫံ‫ݛ‬๕ሞSDOฉ๼‫؜‬ຕ਍ᅜतሞDINฉ๼෇
ຕ਍ઠ༵ࠃ้ዓă
Rev. B | Page 9 of 32
AD7682/AD7689
ᆅগ
Պࡽ
14
AD7682
ᆅগఁ‫׬‬
SDO
AD7689
ᆅগఁ‫׬‬
SDO
ૌ႙1
DO
௮ຎ
‫ز‬ႜຕ਍๼‫؜‬ăገ࣑঳ࡕཚࡗُᆅগ๼‫؜‬LjᇑSCKཞօă‫ڇ‬टႠఇ๕ူLjገ࣑঳ࡕྺ
኱থܾ৊዆ǗມटႠఇ๕ူLjገ࣑঳ࡕྺܾ৊዆ցஓă
15
VIO
VIO
P
16
17
IN0
NC
IN0
IN1
AI
AI
18
IN1
IN2
AI
19
NC
IN3
AI
21
(EPAD)
Exposed Pad
(EPAD)
Exposed
Pad (EPAD)
NC
๼෇/๼‫؜‬থ੨ຕጴ‫ۉ‬ᇸăُᆅগ‫ڦ‬Ք‫ۉ׬‬ᇸᇑዷऐথ੨‫ۉ‬ᇸ၎ཞ(1.8 VĂ2.5 VĂ3 Vई
5 V)ă
ఇె๼෇ཚ‫ڢ‬0ă
AD7682ǖփ૶থă
AD7689ǖఇె๼෇ཚ‫ڢ‬1ă
AD7682ǖఇె๼෇ཚ‫ڢ‬1ă
AD7689ǖఇె๼෇ཚ‫ڢ‬2ă
AD7682ǖփ૶থă
AD7689ǖఇె๼෇ཚ‫ڢ‬3ă
஋୞ࡰಎփሞాև૶থăྺ༵ߛࡰথ‫ڦ‬੗੍ႠLjॺᅱॽࡰಎࡰথ‫ڟ‬ဣཥ‫֫ں‬ă
1
AI = ఇె๼෇LjAI/O = ఇె๼෇/๼‫؜‬LjDI = ຕጴ๼෇LjDO = ຕጴ๼‫؜‬LjP = ‫ۉ‬ᇸLjNC = փሞాև૶থă
Rev. B | Page 10 of 32
AD7682/AD7689
‫ۆ‬႙߾ፕ༬Ⴀ!
‫ݥأ‬ଷᆶຫ௽LjVDD = 2.5 V዁5.5 VLjVREF = 2.5 V዁5 VLjVIO = 2.3 V዁VDDă
1.5
1.5
INL MAX = +0.34 LSB
INL MIN = –0.44 LSB
1.0
DNL MAX = +0.20 LSB
DNL MIN = –0.22 LSB
1.0
0.5
DNL (LSB)
INL (LSB)
0.5
0
0
–0.5
0
16,384
32,768
49,152
65,536
CODES
07353-009
–1.5
–1.0
0
16,384
32,768
49,152
཮6. ओ‫ݥݴ‬၍Ⴀᇑஓ‫࠲ڦ‬ဣLjVREF = VDD = 5 V
཮9. ྲ‫ݥݴ‬၍Ⴀᇑஓ‫࠲ڦ‬ဣLjVREF = VDD = 5 V
200k
160k
σ= 0.50
VREF = VDD = 5V
180k
65,536
CODES
07353-006
–0.5
–1.0
σ= 0.78
VREF = VDD = 2.5V
135,207
140k
160k
100k
120k
COUNTS
COUNTS
120k
135,326
124,689
140k
100k
80k
80k
63,257
60k
51,778
60k
40k
20k
20k
0
487
619
0
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000
0
0
8001
8002
CODE IN HEX
6649
1
0
07353-007
0
0
7FFB 7FFC 7FFD 7FFE 7FFF 8000
60
1
8002
8003
཮10. ᅃ߲኱ୁ๼෇‫ڦ‬ዹጒ཮)ஓዐ႐*
0
0
VREF = VDD = 5V
fS= 250kSPS
fIN = 19.9kHz
SNR = 92.9dB
SINAD = 92.4dB
THD = –102dB
SFDR = 103dB
SECOND HARMONIC = –111dB
THIRD HARMONIC = –104dB
–40
–60
–80
VREF = VDD = 2.5V
fs= 200kSPS
fIN = 19.9kHz
SNR = 88.0dB
SINAD = 87.0dB
THD = –89dB
SFDR = 89dB
SECOND HARMONIC = –105dB
THIRD HARMONIC = –90dB
–20
AMPLITUDE (dB of Full-Scale)
–20
–100
–120
–140
–40
–60
–80
–100
–120
–140
–160
0
25
50
75
100
FREQUENCY (kHz)
125
–180
0
25
50
75
FREQUENCY (kHz)
཮11. 20 kHz FFTLjVREF = VDD = 2.5 V
཮8. 20 kHz FFTLjVREF = VDD = 5 V
Rev. B | Page 11 of 32
100
07353-011
–160
07353-008
AMPLITUDE (dB of Full-Scale)
4090
8001
CODE IN HEX
཮7. ᅃ߲኱ୁ๼෇‫ڦ‬ዹጒ཮(ஓዐ႐)
–180
78
07353-010
40k
AD7682/AD7689
95
95
90
90
85
85
80
75
60
0
50
VREF
VREF
VREF
VREF
70
65
100
150
200
FREQUENCY (kHz)
60
0
50
17.0
SNR @ 2kHz
SINAD @ 2kHz
SNR @ 20kHz
SINAD @ 20kHz
ENOB @ 2kHz
ENOB @ 20kHz
16.5
200
130
–60
125
–65
120
16.0
15.5
88
15.0
86
14.5
–75
110
SFDR (dB)
90
–70
SFDR = 2kHz
115
ENOB (Bits)
SNR, SINAD (dB)
150
཮15. SINADᇑೕ୲‫࠲ڦ‬ဣ
96
92
100
FREQUENCY (kHz)
཮12. SNRᇑೕ୲‫࠲ڦ‬ဣ
94
= VDD = 5V, –0.5dB
= VDD = 5V, –10dB
= VDD = 2.5V, –0.5dB
= VDD = 2.5V, –10dB
–80
105
–85
100
95
SFDR = 20kHz
–90
THD = 20kHz
–95
90
84
14.0
82
–100
85
–105
THD = 2kHz
80
13.5
–110
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
13.0
REFERENCE VOLTAGE (V)
07353-013
75
80
1.0
–115
70
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
–120
5.5
REFERENCE VOLTAGE (V)
཮13. SNRĂSINADࢅENOBᇑएጚ‫ۉ‬უ‫࠲ڦ‬ဣ
཮16. SFDRࢅTHDᇑएጚ‫ۉ‬უ‫࠲ڦ‬ဣ
96
–90
fIN = 20kHz
94
THD (dB)
65
75
07353-016
70
= VDD = 5V, –0.5dB
= VDD = 5V, –10dB
= VDD = 2.5V, –0.5dB
= VDD = 2.5V, –10dB
07353-041
VREF
VREF
VREF
VREF
80
07353-012
SINAD (dB)
100
SNR (dB)
100
fIN = 20kHz
VREF = VDD = 5V
–95
THD (dB)
VREF = VDD = 5V
90
–100
VREF = VDD = 2.5V
VREF = VDD = 2.5V
88
–105
84
–55
–35
–15
5
25
45
65
TEMPERATURE (°C)
85
105
125
–110
–55
–35
–15
5
25
45
65
TEMPERATURE (°C)
཮14. SNRᇑ࿒‫࠲ڦ܈‬ဣ
཮17. THDᇑ࿒‫࠲ڦ܈‬ဣ
Rev. B | Page 12 of 32
85
105
125
07353-017
86
07353-014
SNR (dB)
92
AD7682/AD7689
3000
100
2.5V INTERNAL REF
4.096V INTERNAL REF
INTERNAL BUFFER, TEMP ON
INTERNAL BUFFER, TEMP OFF
EXTERNAL REF, TEMP ON
EXTERNAL REF, TEMP OFF
VIO
VDD CURRENT (μA)
2500
–90
–100
–120
0
50
= VDD = 5V, –0.5dB
= VDD = 2.5V, –0.5dB
= VDD = 2.5V, –10dB
= VDD = 5V, –10dB
100
150
200
FREQUENCY (kHz)
60
1750
50
1500
40
1250
30
3.0
3.5
94
4.5
20
5.5
5.0
཮21. ߾ፕ‫ୁۉ‬ᇑ‫ۉ‬ᇸ‫࠲ڦ‬ဣ
3000
fIN = 20kHz
180
fS = 200kSPS
2750
160
VREF = VDD = 5V
93
VDD = 5V, INTERNAL 4.096V REF
2500
VDD CURRENT (μA)
92
SNR (dB)
4.0
VDD SUPPLY (V)
཮18. THDᇑೕ୲‫࠲ڦ‬ဣ
95
70
2000
1000
2.5
07353-015
VREF
VREF
VREF
VREF
–110
2250
80
91
90
89
VREF = VDD = 2.5V
88
140
2250
120
VDD = 5V, EXTERNAL REF
2000
100
1750
80
1500
60
VDD = 2.5, EXTERNAL REF
87
1250
86
VIO CURRENT (μA)
THD (dB)
–80
90
VIO CURRENT (μA)
2750
–70
fS = 200kSPS
07353-021
–60
40
–8
–6
–4
–2
0
INPUT LEVEL (dB)
1000
–55
–35
–15
65
85
105
20
125
25
2
VDD = 2.5V, 85°C
20
tDSDO DELAY (ns)
1
0
–1
UNIPOLAR ZERO
UNIPOLAR GAIN
BIPOLAR ZERO
BIPOLAR GAIN
–35
–15
5
15
VDD = 2.5V, 25°C
10
VDD = 5V, 85°C
VDD = 5V, 25°C
5
07353-023
VDD = 3.3V, 85°C
VDD = 3.3V, 25°C
25
45
65
85
105
TEMPERATURE (°C)
125
0
07353-020
OFFSET ERROR AND GAIN ERROR (LSB)
45
཮22. ߾ፕ‫ୁۉ‬ᇑ࿒‫࠲ڦ܈‬ဣ
3
–3
–55
25
TEMPERATURE (°C)
཮19. SNRᇑ๼෇‫ۉ‬ೝ‫࠲ڦ‬ဣ
–2
5
཮20. ฿ۙࢅሺᅮဃֶᇑ࿒‫࠲ڦ܈‬ဣ
0
20
40
60
80
SDO CAPACITIVE LOAD (pF)
100
཮23. tDSDO ჽ‫׿‬ᇑSDO‫ۉ‬ඹ޶ሜࢅ‫ۉ‬ᇸ‫࠲ڦ‬ဣ
Rev. B | Page 13 of 32
120
07353-022
85
–10
07353-018
VIO
AD7682/AD7689
ຍᇕ
ፌ‫گ‬ᆶၳ࿋(LSB)
LSB๟ገ࣑ഗ੗ᅜ՗๖‫ڦ‬ፌၭሺଉă‫ܔ‬ᇀN࿋‫ݴ‬Ր୲‫ڦ‬ఇຕ
ገ࣑ഗLjLSBᆩ‫ۉ‬უ՗๖ྺǖ
ओ‫ݥݴ‬၍Ⴀ(INL)
INL๟ኸ௅߲ஓᇑᅃཉٗ޶஢ଉ‫ڟࣃײ‬ኟ஢ଉ‫ڦײ‬኱၍‫ڦ‬
ೋֶăᆩፕ޶஢ଉ‫؜ۅ޿ڦײ‬၄ሞ‫ڼ‬ᅃ߲ஓገ࣑ኮമ‫½ڦ‬
LSB‫ت‬ăኟ஢ଉ‫ۨײ‬ᅭྺ‫؜ג‬ፌࢫᅃ߲ஓገ࣑1½ LSB‫ڦ‬ᅃ
߲‫ۉ‬ೝăٗ߳ஓ‫ڦ‬ዐ႐‫޿ڟ‬኱၍‫ڦ‬ਐ૗नྺೋֶ)९཮
25*ă
ྲ‫ݥݴ‬၍Ⴀ(DNL)
ሞᅃ߲૙ၙADCዐLjஓገ࣑၎ਐ1 LSBăDNL๟ኸํाኵ
ᇑُ૙ၙኵ‫ڦ‬ፌ‫ٷ‬ೋֶăঢ়‫׉‬ᆩԍኤ࿮฿ஓ‫ݴڦ‬Ր୲ઠ௮
ຎኄᅃࡀ߭ă
฿ۙဃֶ!
‫ڼ‬ᅃ߲ஓገ࣑ᆌ‫ܔ‬ᆌᇀᅃ߲Բఇె‫½ߛں‬
ۙဃֶ๟ኸํाገ࣑ᇑ޿‫ڦۅ‬ೋֶă
႑ሯԲ(SNR)
SNRኸํा๼෇႑ࡽ‫ڦ‬਩‫ߵݛ‬ኵᇑలઊຯ༬ೕ୲ᅜူ‫أ‬ၿ
հࢅ኱ୁᅜྔ໯ᆶഄ໲ೕ೷‫ڦݴׯ‬਩‫ࢅߵݛ‬ኮԲLjᆩ‫ݴ‬Ԟ
(dB)՗๖ă
႑భԲ(SINAD)
SINADኸํा๼෇႑ࡽ‫ڦ‬਩‫ߵݛ‬ኵᇑలઊຯ༬ೕ୲ᅜူԈ
ઔၿհ‫ڍ‬኱ୁ‫ڦྔأ‬໯ᆶഄ໲ೕ೷‫ڦݴׯ‬਩‫ࢅߵݛ‬ኮԲLj
ᆩ‫ݴ‬Ԟ(dB)՗๖ă
ጺၿհ฿ኈ(THD)
THDኸമ࿵߲ၿհ‫ڦݴׯ‬਩‫ࢅߵݛ‬ᇑ஢ଉ‫ײ‬๼෇႑ࡽ‫ڦ‬਩
‫ߵݛ‬ኵኮԲLjᆩ‫ݴ‬Ԟ(dB)՗๖ă
࿮ሗො‫ۯ‬ༀ‫(ྷݔ‬SFDR)
SFDRኸ๼෇႑ࡽᇑ‫ރ‬ኵሗො႑ࡽ‫ڦ‬਩‫ޗߵݛ‬ኵኮֶLjᆩ‫ݴ‬
Ԟ(dB)՗๖ă
ᆶၳ࿋ຕ(ENOB)
ENOBኸ૧ᆩኟ၀հ๼෇֪‫ݴڦڥ‬Ր୲ă໲ᇑSINAD‫࠲ڦ‬
ဣ੗ᅜ՗๖ྺǖ
LSB‫ۉڦ‬ೝă฿
ሺᅮဃֶ!
ፌࢫᅃ߲ஓገ࣑)ٗ111 … 10‫ڟ‬111 … 11*݀ิሞ‫گ‬ᇀՔ‫׬‬஢
ଉ‫ײ‬1½ LSB‫ڦ‬ఇె‫ۉ‬უăሺᅮဃֶ๟ኸሞၩ‫أ‬฿ۙဃֶኮ
ࢫLjፌࢫᅃ߲ஓገ࣑‫ํڦ‬ा‫ۉ‬ೝᇑ૙ၙ‫ۉ‬ೝ‫ڦ‬ೋֶLjᆩ
LSB(ई஢ଉ‫ڦྷݔײ‬ӥ‫ݴ‬Բ)՗๖ăᇑኮ‫׉ݥ‬၎ຼ‫ڦ‬ᅃ߲߁
౒๟஢ଉ‫ײ‬ဃֶ(ᄺᆩLSBई஢ଉ‫ڦྷݔײ‬ӥ‫ݴ‬Բ՗๖)Ljࢫ
ኁԈઔ฿ۙဃֶ‫ڦ‬ᆖၚă
੥০ჽ‫!׿‬
੥০ჽ‫࢚׿‬ଉ֑णႠీLjኸٗCNV๼෇‫ڦ‬ฉืᄂ‫ڟ‬๼෇႑
ࡽԥԍ‫׼‬ժ੗৊ႜገ࣑‫้ڦ‬क़ă
ຨༀၚᆌ!
ຨༀၚᆌ๟ኸ๼‫؜‬஢ଉ‫ײ‬঩ሂ႑ࡽኮࢫLjADC‫ܔ‬๼෇৊ႜ
৛ඓ֑ण໯Ⴔ‫้ڦ‬क़ă
‫ۯ‬ༀ‫!ྷݔ‬
‫ۯ‬ༀ‫ྷݔ‬ኸ஢ଉ‫ڦײ‬਩‫ߵݛ‬ኵᇑ๼෇‫܌‬থሞᅃഐ้֪‫ڦڥ‬
ጺ਩‫ߵݛ‬ሯำኮԲLjᆩ‫ݴ‬Ԟ(dB)՗๖ă
໲ᆩ࿋՗๖ă
ཚ‫ڢ‬क़‫ز‬ඡ!
ཚ‫ڢ‬क़‫ز‬ඡ࢚ଉඪᅪଇ߲၎ତཚ‫ڢ‬ኮक़‫زڦ‬ඡ຤ೝLjഄ֪
ଉ‫݆ݛ‬๟ॽᅃ߲኱ୁ႑ࡽแेᇀ‫֪ځ‬ཚ‫ڢ‬Ljժॽᅃ߲஢ଉ
‫ײ‬100 kHzኟ၀հ႑ࡽแेᇀ၎ତཚ‫ڢ‬ăႅ୑৊෇֪๬ཚ‫ڢ‬
‫ڦ‬႑ࡽଉनྺ‫ز‬ඡLjᆩ‫ݴ‬Ԟ(dB)՗๖ă
एጚ‫ۉ‬უ࿒‫܈‬ဣຕ!
एጚ‫ۉ‬უ࿒‫܈‬ဣຕ๟LjሞTMINĂT(25°C)ࢅTMAX้֪ଉ‫ڦ‬ፌ
‫ࢅٷ‬ፌၭएጚ๼‫ۉ؜‬უ(VREF)ᇑሞ25°C้‫ڦ‬๼‫ۉ؜‬უ‫ۆڦ‬
႙ೋᅎă໲ᆩppm/°C՗๖Ljऺ໙ࠅ๕ྺǖ
ഄዐǖ
VREF (Max)ྺTMINĂT (25°C)ईTMAX้‫ڦ‬ፌ‫ٷ‬VREFă
VREF (Min)ྺTMINĂT (25°C)ईTMAX้‫ڦ‬ፌၭVREFă
VREF (25°C)ྺ25°C้‫ڦ‬VREFă
TMAX = +85°C.
TMIN = –40°C.
Rev. B | Page 14 of 32
$'$'
߾ፕᇱ૙!
INx+
SWITCHES CONTROL
MSB
32,768C
16,384C
LSB
4C
2C
C
SW+
C
BUSY
REF
COMP
GND
32,768C
16,384C
4C
2C
C
MSB
CONTROL
LOGIC
OUTPUT CODE
C
LSB
SW–
07353-026
CNV
INx– OR
COM
཮24. ADC०ࣅ‫ۉ‬ୟ཮
߁ຎ!
ገ࣑ഗ֡ፕ!
AD7682/AD7689๟4/8ཚ‫ڢ‬Ă16࿋Ă‫ࢁۉ‬ም‫ݴ‬ದደْ԰ৎस
٪ഗ(SAR)႙ఇຕገ࣑ഗ(ADC)Lj௅௱ీࠕገ࣑250,000߲
֑ᄣ‫(ۅ‬250 kSPS)Ljଇْገ࣑ኮक़ഗॲ࠲܏ă‫֑ړ‬ᆩྔևए
ጚ‫ۉ‬უᇸժᅜ1 kSPS໏୲߾ፕ้Lj‫ۆ‬႙ࠀࡼྺ17 μWLj‫׉ݥ‬
๢ࢇ‫ڦۉࠃ׾ۉ‬ᆌᆩă
AD7682/AD7689๟ ए ᇀ ‫ ࢁ ۉ‬ም ‫ ݴ‬ದ DAC‫ ڦ‬ደ ْ ԰ ৎ ႙
ADCă཮24၂๖କ޿ADC‫ڦ‬०ࣅ‫ۉ‬ୟ཮ăඹႠDACԈࡤ2
߲ྜඇ၎ཞ‫ڦ‬16࿋ܾ৊዆े඄‫ۉ‬ඹንଚLjժ૶থ‫ڟ‬Բডഗ
‫ڦ‬ଇ߲๼෇‫܋‬ă
AD7682/AD7689ాዃ‫ܠ‬ཚ‫ڢ‬Ă‫ࡼࠀگ‬ຕ਍֑णဣཥ໯Ⴔ‫ڦ‬
໯ᆶፇ‫ׯ‬և‫ݴ‬LjԈઔǖ
t
t
t
t
t
t
16࿋࿮฿ஓ‫ڦ‬SAR ADC
4/8ཚ‫ڢ‬Ă‫زگ‬ඡ‫ܠ‬ୟްᆩഗ
ాև‫گ‬೏ᅎएጚ‫ۉ‬უᇸࢅ࣐؋
࿒‫ߌد܈‬ഗ
੗჋‫ڇ‬ट‫୳ۅ‬հഗ
ཚ‫ڢ‬Ⴞଚഗ
ኄၵᇮॲཚࡗᅃ߲SPIग़ඹ‫ڦ‬14࿋स٪ഗ৊ႜದዃăገ࣑঳
ࡕᄺ๟SPIग़ඹ‫ڦ‬Lj੗ᅜሞገ࣑ኮࢫईገ࣑೺क़‫܁‬ൽLjժ
൐੗ᅜ჋ስ࣮‫܁‬ᇑገ࣑၎࠲‫ڦ‬ದዃă
AD7682/AD7689ྺᆩࢽ༵ࠃକೌా֑ᄣԍ‫׼‬ഗLjுᆶୁ຤
၍ჽ‫׿‬ă
AD7682/AD7689‫߾ۨܮڦ‬ፕ‫ۉ‬უྺ2.3 V዁5.5 VLj੗ᅜᇑඪ
ࢆ1.8 V዁5 Vຕጴஇडဣଚথ੨ăଇ੼ഗॲ֑ᆩ20ᆅগĂ4
mm × 4 mm LFCSP‫ހ‬ጎLjবู੣क़LjದዃଳऄăAD7682/
AD7689ᇑ16࿋AD7699ࢅ14࿋AD7949ᆅগग़ඹă
ሞ֑ण঩܎LjᇑԲডഗ๼෇၎૶‫ڦ‬ንଚ‫܋‬ጱཚࡗSW+ࢅ
SW-૶থ‫ڟ‬GNDă໯ᆶ‫܀‬૬ਸ࠲‫૶ۼ‬থ‫ڟ‬ఇె๼෇‫܋‬ă
ᅺُLj‫ۉ‬ඹንଚᆩፕ֑ᄣ‫ۉ‬ඹᅜ֑णINx+ࢅINx−)ईCOM*
๼෇‫ڦ܋‬ఇె႑ࡽă‫֑ړ‬ण঩܎ྜ‫ׯ‬൐CNV๼෇Վྺߛ‫ۉ‬
ೝ้Lj৽ࣷഔ‫ۯ‬ገ࣑঩܎ă‫ړ‬ገ࣑঩܎ਸ๔้LjSW+ࢅ
SW-๯ံ܏ਸă඗ࢫLj2߲‫ۉ‬ඹንଚٗ๼෇‫܏܋‬ਸLj૶থ‫ڟ‬
GND๼෇ăᅺُLj֑ण঩܎঳ຐ้վጛ‫ڦڟ‬INx+ᇑINx−
)ईCOM*๼෇ኮक़‫ۉݴֶڦ‬უԥแेᇀԲডഗ๼෇‫܋‬Lj‫ڞ‬
ዂԲডഗՎ‫ڥ‬փೝ࢚ăሞGNDᇑREFኮक़ൎ࣑‫ۉ‬ඹንଚ‫ڦ‬
߳ᇮॲLjԲডഗ๼෇ॽӀቷܾ৊዆े඄‫ۉ‬უօ৊
)VREF/2ĂVREF/4 . . . VREF/32,768*Վࣅă੦዆இडٗMSBਸ
๔ᅈْൎ࣑ኄၵਸ࠲LjᅜՍ๑Բডഗዘႎ࣮‫ڟ‬ೝ࢚ጒༀă
ྜ‫ࢫײࡗُׯ‬Ljഗॲ‫֑࣮ݓ‬ण঩܎Lj੦዆இडׂิADC๼
‫؜‬ஓࢅ‫ݏ‬஬႑ࡽኸ๖ă
AD7682/AD7689ਏᆶᅃ߲ೌฉገ้࣑ዓLjᅺُገ࣑ࡗ‫ײ‬փ
Ⴔᄲ‫ز‬ႜ้ዓSCKă
Rev. B | Page 15 of 32
AD7682/AD7689
๼෇ದዃྺມटႠ‫)้ྷݔ‬COM=VREF/2ईINx− = VREF/2‫ֶڦ‬
‫*ܔݴ‬Ljຕ਍๼‫ܾྺ؜‬৊዆ցஓă
AD7682/AD7689‫ڦ‬૙ၙ‫ڿد‬༬Ⴀස཮25໯๖Ljഄዐ၂๖କ
๑ᆩ4.096 Vాևएጚ‫ۉ‬უᇸ้‫ڇڦ‬टႠࢅມटႠ‫ྷݔ‬ă
TWOS
STRAIGHT
COMPLEMENT
BINARY
011...111
111...111
011...110
011...101
111...110
111...101
100...010
000...010
100...001
000...001
100...000
000...000
–FSR
–FSR + 1LSB
–FSR + 0.5LSB
+FSR – 1LSB
+FSR – 1.5LSB
ANALOG INPUT
07353-027
๼෇ದዃྺ‫ڇ‬टႠ‫܋ڇ)้ྷݔ‬LjCOMྺ֖੊‫ں‬LjईINx−
ྺ֖੊‫*ܔݴֶڦں‬Ljຕ਍๼‫ྺ؜‬኱থܾ৊዆ă
ADC CODE
‫ࡧڿد‬ຕ!
཮25. ADC૙ၙ‫ࡧڿد‬ຕ
՗8. ๼‫؜‬ஓࢅ૙ၙ๼෇‫ۉ‬უ
௮ຎ
FSR − 1 LSB
ዐक़‫ۉ‬ೝ + 1 LSB
ዐक़‫ۉ‬ೝ
ዐक़‫ۉ‬ೝ − 1 LSB
−FSR + 1 LSB
−FSR
1
2
3
4
‫ڇ‬टႠఇె๼෇1
VREF= 4.096 V
4.095938 V
2.048063 V
2.048 V
2.047938 V
0V
ຕጴ๼‫؜‬ஓ
(ๆୃ৊዆‫ڦ‬኱থܾ৊዆ஓ)
0xFFFF3
0x8001
0x8000
0x7FFF
0x0001
0x00004
COMईINx− = 0 VLjईኁ໯ᆶInxᅜGNDྺ֖੊ă
COMईINx− = VREF /2ă
ኄᄺ๟‫ג‬ଉ‫ײ‬ఇె๼෇)(INx+) − (INx−)ईCOMߛᇀVREF − GND*‫ܔ‬ᆌ‫ڦ‬ஓă
ኄᄺ๟വଉ‫ײ‬ఇె๼෇)(INx+) − (INx−)ईCOM‫گ‬ᇀGND*‫ܔ‬ᆌ‫ڦ‬ஓă
Rev. B | Page 16 of 32
ມटႠఇె๼෇2
VREF= 4.096 V
2.047938 V
0V
−2.047938 V
−2.048 V
ຕጴ๼‫؜‬ஓ
(ๆୃ৊዆‫ܾڦ‬৊዆ցஓ)
0x7FFF3
0x0001
0x0000
0xFFFF
0x8001
0x80004
AD7682/AD7689
‫ۆ‬႙૶থ཮!
5V
REF
0V TO VREF
IN0
V–
REFIN VDD
100nF
VIO
AD7689
V+
DIN
MOSI
IN[7:1]
0V TO VREF
ADA4841-x 3
SCK
SCK
SDO
MISO
CNV
SS
V–
0V OR
VREF /2
COM
GND
NOTES
1. INTERNAL REFERENCE SHOWN. SEE VOLTAGE REFERENCE OUTPUT/INPUT SECTION FOR
REFERENCE SELECTION.
2. CREF IS USUALLY A 10μF CERAMIC CAPACITOR (X5R).
3. SEE THE DRIVER AMPLIFIER CHOICE SECTION FOR ADDITIONAL RECOMMENDED AMPLIFIERS.
4. SEE THE DIGITAL INTERFACE SECTION FOR CONFIGURING AND READING CONVERSION DATA.
07353-028
ADA4841-x 3
100nF
100nF
10μF2
V+
1.8V TO VDD
཮26. ֑ᆩ‫ۉ߲ܠ‬ᇸ‫ۆڦ‬႙ᆌᆩ‫ۉ‬ୟ
1.8V TO VDD
+5V
10μF2
100nF
100nF
100nF
V+
REF
REFIN VDD
VIO
ADA4841-x 3
V–
AD7689
DIN
MOSI
SCK
SCK
SDO
MISO
CNV
SS
IN[7:1]
V+
ADA4841-x 3
V–
VREF p-p
VREF /2
COM
GND
NOTES
1. INTERNAL REFERENCE SHOWN. SEE VOLTAGE REFERENCE OUTPUT/INPUT SECTION FOR
REFERENCE SELECTION.
2. CREF IS USUALLY A 10μF CERAMIC CAPACITOR (X5R).
3. SEE THE DRIVER AMPLIFIER CHOICE SECTION FOR ADDITIONAL RECOMMENDED AMPLIFIERS.
4. SEE THE DIGITAL INTERFACE SECTION FOR CONFIGURING AND READING CONVERSION DATA.
཮27. ֑ᆩມटႠ๼෇‫ۆڦ‬႙ᆌᆩ‫ۉ‬ୟ
Rev. B | Page 17 of 32
07353-029
IN0
AD7682/AD7689
‫ڇ‬टႠईມटႠ!
70
཮26໯๖‫ڦ‬૩ጱྺ֑ᆩ‫ۉ߲ܠ‬ᇸ้AD7682/AD7689‫ॺڦ‬ᅱ
૶থ཮ă
65
60
ມटႠ‫ۉڇ‬ᇸ!
CMRR (dB)
55
཮27໯๖‫ڦ‬૩ጱྺᅃ߲ມटႠ๼෇ဣཥLj໲֑ᆩ‫ۉڇ‬ᇸࢅ
ాևएጚ‫ۉ‬უᇸ)੗჋ስփཞ‫ڦ‬VIO‫ۉ‬ᇸ*ă‫ٷݣړ‬ഗ/႑ࡽ
ۙ૙‫ۉ‬ୟ࿋ᇀᇺ‫܋‬ժ٪ሞగᅃࠌఇ‫ۉ‬უ้Ljُ‫ۉ‬ୟᄺ࢔ᆶ
ᆩă൩ጀᅪLj‫ܔ‬ᇀඪࢆ๼෇ದዃLjInx๼෇‫ۼ‬๟‫ڇ‬टႠLjժ
๔ዕᅜGNDྺ֖੊)न๑ሞມटႠ‫ྷݔ‬ᄺփ٪ሞ޶‫ۉ‬უ*ă
ఇె๼෇!
๼෇঳ࠓ
཮28၂๖କAD7682/AD7689๼෇঳ࠓ‫ڪڦ‬ၳ‫ۉ‬ୟă2߲ܾ
ट࠶D1ࢅD2ྺఇె๼෇)IN[7:0]ࢅCOM*༵ࠃESDԍࢺăጀ
ᅪLjఇె๼෇႑ࡽփీ‫ࡆۉࠃࡗג‬0.3 VᅜฉLj‫ޏ‬ሶࣷሰ‫ׯ‬
ܾट࠶ኟೋLjժਸ๔‫ୁۉڞد‬ă
ኄၵܾट࠶੗ᅜ‫ت‬૙ፌߛ130 mA‫ڦ‬ኟೋ‫ୁۉ‬ă૩සLj‫ړ‬๼
෇࣐؋‫ۉ‬ᇸᇑVDDփཞ้Ljፌዕ੗ీࣷ݀ิኄዖ൧઄ăُ
้Ljසࡕ๼෇࣐؋‫܌‬ୟLj‫ୁۉ‬၌዆੗ᅜԍࢺഗॲă
40
35
30
D1
CPIN
RIN
10
100
FREQUENCY (kHz)
1k
10k
ሞ֑ण঩܎Ljఇె๼෇‫ڦ‬ፆੇ੗ᅜੂ‫ׯ‬๟ᆯRINࢅCIN‫૴ز‬
ࠓ‫ྪڦׯ‬ஏᇑ‫ۉ‬ඹCPIN‫ڦ‬ժ૴ፇࢇăCPINዷᄲԈઔᆅগ‫ۉ‬
ඹăRIN‫ۆ‬႙ኵྺ2.2 kΩLj๟ᆯ‫ۉ૴ز‬ፆᇑਸ࠲‫ڞڦ‬ཚ‫ۉ‬ፆ
ࠓ‫ڦׯ‬णጺᇮॲăCIN‫ۆ‬႙ኵྺ27 pFLjዷᄲԈઔADC֑ᄣ
‫ۉ‬ඹă
੗჋‫گ‬ཚ୳հഗ!
ሞገ࣑঩܎Ljਸ࠲܏ਸLj๼෇ፆੇৈԈઔCPINă‫ړ‬AD7682/
AD7689৊ႜ֑ण้LjRINᇑC INࠓ‫ׯ‬ᅃ߲‫ڇ‬ट‫گۅ‬ཚ୳հ
ഗLj੗ᅜই‫گ‬փଆं۠ᆖၚժ၌዆ઠጲൻ‫ۉۯ‬ୟ‫ڦ‬ሯำă
޿‫گ‬ཚ୳հഗ੗ᅜཚࡗCFG[6]Պ‫ྺײ‬ඇ‫੻ټ‬ई¼‫੻ټ‬Ljස
՗10໯๖ăُยዃॽRINՎྺ19 kΩă൩ጀᅪLj๑ᆩ޿୳հ
ഗ้Ljገ࣑ഗཾུ໏୲ᄺՂႷই‫¼ྺگ‬ăසࡕሞ‫(੻ټ‬BW)
ยྺ¼้๑ᆩፌߛཾུ໏୲Lj৽ࣷྵ‫ݒ‬ገ࣑ഗ֑ण้क़tACQ
ᄲ൱Lj‫ڞ‬ዂTHD༵ߛă
CIN
D2
07353-030
GND
1
཮29. ఇె๼෇CMRRᇑೕ୲‫࠲ڦ‬ဣ
VDD
INx+
OR INx–
OR COM
45
07353-031
‫ܔ‬ᇀُ‫ۉ‬ୟLj੗ᅜ๑ᆩࡆ‫ࡆڟ‬๼෇ࢅ๼‫ٷݣڦ؜‬ഗLj‫ڍ‬ᆌ
ጀᅪժ੊୯฿ۙ‫ۉ‬უᇑ๼෇ࠌఇ‫࠲ڦྷݔ‬ဣ)VREF = 4.096 V
้Lj1 LSB = 62.5 μV*ă൩ጀᅪLj‫ړ‬๑ᆩມटႠ๼෇ದዃ
้Ljገ࣑঳ࡕྺܾ৊዆ցஓ߭๕ăᆶ࠲๑ᆩ‫ۉڇ‬ᇸ‫ٷݣ‬ഗ
‫ܠ߸ڦ‬႑တLj൩֖੊ADIࠅິྪበ(www.analog.com)ฉ‫ڦ‬
ᆌᆩԴऻAN-581ǖ“‫ۉڇ‬ᇸᆌᆩዐ‫ڦ‬ሏ໙‫ٷݣ‬ഗೋዃࢅඁ
᳘”ă
50
཮28. ‫ڪ‬ၳఇె๼෇‫ۉ‬ୟ
޿ఇె๼෇঳ࠓኧ‫ܔ׼‬INx+ᇑCOMईINx+ᇑINx−ኮक़‫ڦ‬
ኈֶ‫ݴ‬႑ࡽ৊ႜ֑ᄣă)COMईINx− = GND ± 0.1 VईVREF ±
0.1 Vă*૧ᆩኄၵֶ‫ݴ‬๼෇੗ᅜᅞ዆ଇ߲๼෇‫ࠌڦ܋‬ఇ႑
ࡽLjස཮29໯๖ă
Rev. B | Page 18 of 32
AD7682/AD7689
๼෇ದዃ!
཮30၂๖କ૧ᆩದዃस٪ഗCFG[12:10]ದዃఇె๼෇‫ڦ‬փ
ཞ‫݆ݛ‬ăၘ൧൩֖९“ದዃस٪ഗLjCFG”և‫ݴ‬ă
ఇె๼෇੗ᅜದዃྺǖ
t
!
཮30ALj‫܋ڇ‬Ljᅜဣཥ‫੊֖ྺں‬ǗCFG[12:10] = 1112ă
ኄዖದዃዐLj໯ᆶ๼෇(IN[7:0])‫ྷݔڦ‬਩ྺGND዁
VREFă
t
཮30BLjਏᆶᅃ߲ࠌఇ֖੊‫ڦۅ‬ມटႠֶ‫ݴ‬ǗCOM =
VREF/2ǗCFG[12:10] = 0102ă
COM૶থ‫ڇڦں੊֖ڟ‬टႠֶ‫ݴ‬ǗCFG[12:10] = 1102ă
ኄዖದዃዐLj໯ᆶ๼෇(IN[7:0])‫ྷݔڦ‬਩ྺGND዁
VREFă
t
t
཮30CLj޶๼෇ཚ‫ڢ‬ᅜVREF/2ྺ֖੊‫ڦ‬ມटႠֶ‫ܔݴ‬Ǘ
CFG[12:10] = 00X2ă޶๼෇ཚ‫ڢ‬ᅜ֖੊‫ڇڦ੊֖ྺں‬ट
Ⴀֶ‫ܔݴ‬ǗCFG[12:10] = 10X2ăኄၵದዃዐLjኟ๼෇ཚ
‫ྺྷݔڦڢ‬GND዁VREFă޶๼෇ཚ‫ྺڢ‬ᅜVREF/2ྺ֖੊
(ມटႠ‫)ܔ‬ईGND(‫ڇ‬टႠ‫)ܔ‬ăኟཚ‫ڢ‬ཚࡗCFG[9:7]ದ
ዃăසࡕCFG[9:7]ྺ౾ຕLjሶ๑ᆩIN0ĂIN2ĂIN4ࢅ
IN6ăසࡕCFG[9:7]ྺആຕLjሶ๑ᆩIN1ĂIN3ĂIN5ࢅ
IN7Ljස཮30Cઔࡽዐ‫ڦ‬ཚ‫ڢ‬໯๖ă૩සLj‫ܔ‬ᇀኟཚ‫ڢ‬
ྺIN0‫ڦ‬IN0/IN1‫ܔ‬LjCFG[9:7] = 0002Ǘ‫ܔ‬ᇀኟཚ‫ྺڢ‬
IN5‫ڦ‬IN4/IN5‫ܔ‬LjCFG[9:7] = 1012ă൩ጀᅪLj‫ܔ‬ᇀႾଚ
ഗ(ၘ९ཚ“‫ڢ‬Ⴞଚഗ”և‫)ݴ‬Ljኟཚ‫ڢ‬๔ዕྺIN0ĂIN2Ă
IN4ࢅIN6ă
཮ 30DLj ๼ ෇ ದ ዃ ྺ ᅜ ฉ ದ ዃ ‫ ڦ‬ඪ ᅪ ፇ ࢇ ) ՗ ௽
AD7682/AD7689੗ᅜ‫ۯ‬ༀದዃ*ă
CH0+
IN0
CH0+
CH1+
IN1
CH1+
IN1
CH2+
IN2
CH2+
IN2
CH3+
IN3
CH3+
IN3
CH4+
IN4
CH4+
IN4
CH5+
IN5
CH5+
IN5
CH6+
IN6
CH6+
IN6
CH7+
IN7
CH7+
IN7
COM
COM–
COM
IN0
GND
A—8 CHANNELS,
SINGLE ENDED
GND
B—8 CHANNELS,
COMMON REFERNCE
CH0+ (–)
IN0
CH0+ (–)
CH0– (+)
IN1
CH0– (+)
IN1
CH1+ (–)
IN2
CH1+ (–)
IN2
CH1– (+)
IN3
CH1– (+)
IN3
CH2+ (–)
IN4
CH2+
IN4
CH2– (+)
IN5
CH3+
IN5
CH3+ (–)
IN6
CH4+
IN6
CH3– (+)
IN7
CH5+
IN7
COM
IN0
COM–
COM
GND
C—4 CHANNELS,
DIFFERENTIAL
GND
D—COMBINATION
07353-032
཮30. ‫ܠ‬ୟްᆩఇె๼෇ದዃ
Ⴞଚഗ
AD7682/AD7689Ԉઔᅃ߲ཚ‫ڢ‬ႾଚഗLjሞዘް෢௮ཚ‫้ڢ‬
‫׉ݥ‬ᆶᆩăᆶ࠲Ⴞଚഗ֡ፕ‫ၘڦ‬ဦ႑တLj൩֖९“ཚ‫ڢ‬Ⴞ
ଚഗ”և‫ݴ‬ă
ᇸፆੇ
‫ ړ‬ൻ ‫ ۉ ۯ‬ୟ ‫ ڦ‬ᇸ ፆ ੇ ড ‫ ้ گ‬Lj ੗ ᅜ ኱ থ ൻ ‫ ۯ‬AD7682/
AD7689ăߛᇸፆੇࣷ၂ዸᆖၚ঍ୁ༬ႠLj༬՚๟THDă
኱ୁ༬Ⴀ‫ܔ‬๼෇ፆੇ‫܈ߌ௺ڦ‬၎‫ܔ‬ড‫گ‬ăፌ‫ڦٷ‬ᇸፆੇൽ
ਦᇀ੗ඹႹ‫ڦ‬ጺၿհ฿ኈ(THD)ăTHDႠీူই‫܈ײ‬๟ᇸ
ፆੇࢅፌ‫ٷ‬๼෇ೕ୲‫ࡧڦ‬ຕă
Rev. B | Page 19 of 32
AD7682/AD7689
ൻ‫ٷݣۯ‬ഗ჋ስ!
एጚ‫ۉ‬უ๼‫؜‬/๼෇
໚඗AD7682/AD7689࢔ඹᅟൻ‫ۯ‬Lj‫ڍ‬ൻ‫ٷݣۯ‬ഗՂႷ஢ፁ
ူଚᄲ൱ǖ
AD7682/AD7689ሎႹ჋ስट‫گ‬࿒‫܈‬೏ᅎ‫ాڦ‬ևएጚ‫ۉ‬უ
ᇸĂྔևएጚ‫ۉ‬უᇸईྔև࣐؋एጚ‫ۉ‬უᇸă
x
AD7682/AD7689‫ాڦ‬ևएጚ‫ۉ‬უᇸ༵ࠃ‫؜‬෥‫ڦ‬ႠీLj੗ᅜ
ᆩᇀबࢭ໯ᆶᆌᆩă੗ీ‫ڦ‬एጚ‫ۉ‬უ‫ݛ‬ӄᆶ6߲Ljස՗10
໯ଚLjၘ൧९ᅜူ߳և‫ݴ‬ă
ൻ‫ۯ‬ഗ‫ٷݣ‬ഗ໯ׂิ‫ڦ‬ሯำՂႷፁࠕ‫گ‬Ljᅜԍ‫׼‬
AD7682/AD7689‫ڦ‬SNRࢅገ࣑ሯำႠీă൩ጀᅪLj
AD7682/AD7689‫ڦ‬ሯำᇺ‫گ‬ᇀ‫ܠٷ‬ຕഄ໲16࿋ADCLj
ᅺُLjन๑๑ᆩሯำড‫ٷݣڦٷ‬ഗઠൻ‫ۯ‬Ljධ඗੗ీ
஢ፁߴۨ‫ڦ‬ဣཥሯำᄲ൱ăઠጲ‫ٷݣ‬ഗ‫ڦ‬ሯำᆯRINࢅ
CIN໯ࠓ‫ڦׯ‬AD7682/AD7689ఇె๼෇‫ۉ‬ୟ‫گ‬ཚ୳հഗ
৊ႜ୳հLjईኁᆯྔև୳հഗ)සᆶ*৊ႜ୳հă
AD7682/AD7689‫ۆڦ‬႙ሯำྺ35 μV rms (VREF= 5V)Ljᅺ
ُ‫ٷݣ‬ഗᆅഐ‫ڦ‬SNRႠీই‫ྺگ‬ǖ
!
๑ీ޿एጚ‫ۉ‬უᇸᄺࣷ๑ీాև࿒‫ߌد܈‬ഗLj໲֪ଉ
AD7682/AD7689‫ాڦ‬և࿒‫܈‬Ljᅺܸ੗ᆩᇀኴႜဣཥၯጚă
൩ ጀ ᅪ Lj ‫ ړ‬๑ ᆩ ࿒ ‫ ߌ د ܈‬ഗ ้ Lj ๼ ‫ ੊ ֖ ྺ ؜‬AD7682/
AD7689 GNDᆅগ‫ڦ‬኱থܾ৊዆ஓă
ഄዐǖ
f–3dBྺAD7682/AD7689‫ڦ‬๼෇‫)੻ټ‬ඇ‫ྺ੻ټ‬1.7 MHzLj
¼‫ྺ੻ټ‬425
kHz*Ljईኁ๼෇୳հഗ)සᆶ*‫ڦ‬পኹೕ
୲ă
࿒‫܈‬ց‫׋‬๑ాևएጚ‫ۉ‬უᇸ‫ڦ‬৛‫ڟٳ܈‬10 mVᅜాăాև
एጚ‫ۉ‬უᇸ๟ঢ়ࡗྲۙ‫ڦ‬Ljഄ‫ۆ‬႙࿒೏ྺ±10 ppm/°Că
Nྺ‫ٷݣ‬ഗ‫ڦ‬ሯำሺᅮ)૩සLj࣐؋ഗದዃ้ྺ1*ă
ස཮31໯๖૶থAD7682/AD7689Ljᅜ๑ᆩ2.5 Vई4.096 Vా
ևएጚ‫ۉ‬უᇸă
eNྺሏ໙‫ٷݣ‬ഗ‫ڪڦ‬ၳ๼෇ሯำ‫ۉ‬უLj‫ڇ‬࿋nV/√Hză
x
x
‫ ܔ‬ᇀ ঍ ୁ ᆌ ᆩ Lj ൻ ‫ ۯ‬ഗ ‫ ڦ‬THDႠ ీ ᆌ ᇑ AD7682/
AD7689၎‫ړ‬ă཮18၂๖କAD7682/AD7689‫ڦ‬THDᇑೕ
୲‫࠲ڦ‬ဣă
‫ܔ‬ᇀ‫ܠ‬ཚ‫ڢ‬Ă‫ܠ‬ୟްᆩᆌᆩLjሞ௅߲๼෇ई๼෇‫ܔ‬
ฉLjൻ‫ٷݣۯ‬ഗࢅAD7682/AD7689ఇె๼෇‫ۉ‬ୟՂႷ
๑‫ۉ‬ඹንଚᅜ16࿋຤ೝ(0.0015%)ॺ૬஢ଉ‫ײ‬঩ሂăሞ
‫ٷݣ‬ഗ‫ڦ‬ຕ਍๮֩ዐLj߸‫׉‬९‫ڦ‬๟ࡀۨ0.1%዁0.01%‫ڦ‬
ॺ૬้क़ăኄ੗ీᇑ16࿋຤ೝ‫ॺڦ‬૬้क़၂ዸփཞLj
ᅺُ჋ስኮമᆌ৊ႜᄓኤă
՗:/!ླྀ४‫ڦ‬ൻ‫ٷݣۯ‬ഗ!
‫ٷݣ‬ഗ!
ADA4841-x
AD8655
AD8021
AD8022
OP184
AD8605, AD8615
‫ۆ‬႙ᆌᆩ
ट‫گ‬ሯำĂၭ؅٫Ă‫ࡼࠀگ‬
5 V‫ۉڇ‬ᇸĂ‫گ‬ሯำ
ट‫گ‬ሯำĂߛೕ
‫گ‬ሯำĂߛೕ
‫ࡼࠀگ‬Ă‫گ‬ሯำĂ‫گ‬ೕ
5 V‫ۉڇ‬ᇸĂ‫ࡼࠀگ‬
Rev. B | Page 20 of 32
10μF
100nF
REF
AD7682/
AD7689
REFIN
TEMP
GND
07353-049
!
ాևएጚ‫ۉ‬უᇸ/࿒‫ߌد܈‬ഗ
৛௢ాևएጚ‫ۉ‬უᇸ๢ࢇ‫ܠٷ‬ຕᆌᆩLj੗ᅜยዃྺ2.5 Vई
4.096 V๼‫؜‬Ljස՗10໯๖ă๑ీాևएጚ‫ۉ‬უᇸ้LjREFIN
ᆅগฉཞᄣ٪ሞ‫ټ‬ဤ‫ۉ‬უLjႴᄲᅃ߲0.1 μFྔև‫ۉ‬ඹă
REFIN‫ୁۉڦ‬๼‫؜‬ᆶ၌Ljසࡕࢫথᅃ߲๢‫࣐ڦړ‬؋ഗLjස
AD8605‫ڪ‬Ljሶ໲੗ᅜᆩፕᅃ߲ᇸă൩ጀᅪLjాևएጚ‫ۉ‬უ
ᇸ‫ڦ‬ยዃփཞ(2.5 Vई4.096 V)LjREFIN‫ۉڦ‬უᄺփཞă
཮31. 2.5 Vई4.096 Vాևएጚ‫ۉ‬უᇸ૶থ
AD7682/AD7689
ྔևएጚ‫ۉ‬უᇸࢅాև࣐؋ഗ
एጚ‫ۉ‬უᇸඁ᳘!
ྺ߀฀೏ᅎႠీLj੗ᅜඟᅃ߲ྔևएጚ‫ۉ‬უᇸದࢇాև࣐
؋ഗ๑ᆩLjස཮32໯๖ăྔևᇸ૶থ‫ڇాೌڟ‬࿋ሺᅮ࣐؋
ഗ‫ڦ‬๼෇‫܋‬REFINLjժሞREFᆅগฉׂิ๼‫؜‬ăྔևएጚ
‫ۉ‬უᇸದࢇాև࣐؋ഗ๑ᆩ้Lj੗ᅜ๑ీई্ᆩ࿒‫ߌد܈‬
ഗăस٪ഗၘ൧֖९՗10ă࣐؋ഗ๑ీࢫLjሺᅮྺ1ժ൐
๼෇/๼‫؜‬၌዆ሞVDD −0.2 VLj‫ڍ‬ፌ‫ٷ‬ඹႹ‫ۉ‬უՂႷၭᇀई
‫ڪ‬ᇀ(VDD − 0.5 V)ă
࿮ஃ๟๑ᆩాևएጚᇸ࣏๟ྔևएጚᇸLjAD7682/AD7689
‫ڦ‬एጚ‫ۉ‬უ๼‫؜‬/๼෇REF‫ۼ‬ਏᆶ‫ۯ‬ༀ๼෇ፆੇLjᅺُ๑૧
ᆩ‫گ‬ፆੇᇸൻ‫ۯ‬REFLjREFᇑGNDᆅগኮक़ᆌᆶၳඁ᳘ă
ُඁ᳘ൽਦᇀ჋ስࢆዖएጚ‫ۉ‬უᇸLj‫ڍ‬ཚ‫׉‬Ԉઔᅃ߲૶থ
‫ڟ‬REFࢅGNDĂਏᆶፌ‫گ‬सิ‫گڦߌۉ‬ESR‫ۉ‬ඹă‫ړ‬๑ᆩ
ాևएጚ‫ۉ‬უᇸĂ ADR43x/ADR44xྔևएጚ‫ۉ‬უᇸई
AD8031ĂAD8605‫گڪ‬ፆੇ࣐؋ഗ้Lj10 μF)X5RĂ1206؅
٫*‫ڦ‬༩ٍႊೌ‫ۉ‬ඹ๟ࢇ๢‫ڦ‬ă
ాևएጚ‫ۉ‬უ࣐؋ഗሞ‫ܠ‬ገ࣑ഗᆌᆩዐ࢔ᆶᆩLjᅺྺኄၵ
ᆌᆩཚ‫׉‬Ⴔᄲᅃ߲࣐؋ഗăُྔLj੗ᅜ๑ᆩᅃ߲‫ࡼࠀگ‬ए
ጚ‫ۉ‬უᇸLjᅺྺాև࣐؋ഗ༵ࠃକൻ‫ۯ‬AD7682/AD7689‫ڦ‬
SARॐࠓ໯Ⴔ‫ڦ‬Ⴀీă
REF SOURCE
≤(VDD – 0.5V)
10μF
100nF
REF
AD7682/
AD7689
एጚ‫ۉ‬უᇸඁ᳘‫ۉ‬ඹ‫ڦ‬Ӧ‫ݣ‬࿋ዃ‫ܔ‬ᇀAD7682/AD7689‫ڦ‬Ⴀ
ీᄺ࢔ዘᄲLjၘ९“քਆք၍”և‫ڦݴ‬ຫ௽ăඁ᳘‫ۉ‬ඹᆌᇑ
ADC‫ڦ‬REFᆅগ࿋ᇀཞᅃ֨Ljժ൐ᆩٚPCBጽ၍૶থă
GNDᄺᆌᅜፌ‫܌‬ਐ૗૶থ‫ڟ‬एጚᇸඁ᳘‫ۉ‬ඹLjժཚࡗຕ߲
ࡗ੥૶থ‫ڟ‬ఇె‫ں‬ă
සࡕႴᄲLj੗ᅜ๑ᆩ‫گ‬዁2.2 μF‫ڦ‬ၭඁ᳘‫ۉ‬ඹLj໲‫ܔ‬Ⴀీ
)༬՚๟DNL*‫ڦ‬ᆖၚटၭă
REFIN
࿮ஃසࢆLjREFᇑGNDᆅগኮक़փႴᄲ‫گڦྔܮ‬ኵ༩ٍඁ
᳘‫ۉ‬ඹ)ස100 nF*ă
TEMP
GND
‫ܔ‬ᇀ๑ᆩ‫߲ܠ‬AD7682/AD7689ഗॲईഄ໲PulSARഗॲ‫ڦ‬ᆌ
ᆩLj๑ᆩాևएጚ‫ۉ‬უ࣐؋ഗ࣐؋ྔևएጚ‫ۉ‬უࣷ߸ᆶ
ၳLjኄᄣీই‫گ‬SARገ࣑‫ز‬ඡă
཮32. ๑ᆩాև࣐؋ഗ‫ྔڦ‬ևएጚ‫ۉ‬უᇸ
ྔևएጚ‫ۉ‬უᇸ
ሞୃዐएጚ‫ۉ‬უ‫ݛ‬ӄዐLjඪࢆᅃዖ‫ۼ‬੗ᅜස཮33໯๖ॽᅃ
߲ྔևएጚ‫ۉ‬უᇸ኱থ૶‫ڟ‬REFᆅগLjᅺྺREF‫ڦ‬๼‫؜‬ፆ
ੇ‫ٷ‬ᇀ5 kΩăྺই‫ࡼࠀگ‬Ljएጚ‫ۉ‬უᇸࢅ࣐؋ഗᆌ‫܏࠲ړ‬ă
‫ܔ‬ᇀႴᄲ๑ᆩ࿒‫ߌد܈‬ഗ‫ڦ‬ᆌᆩLjాևएጚ‫ۉ‬უᇸՂႷԍ
‫׼‬๑ీ(ాև࣐؋ഗ੗ᅜ্ᆩ)ăस٪ഗၘ൧֖९՗10ăྺ
߀฀೏ᅎႠీLjླྀ४๑ᆩADR43xईADR44x‫ྔڪ‬ևएጚ‫ۉ‬
უᇸă
एጚ‫ۉ‬უᇸ࿒‫܈‬ဣຕ(TC)ࣷ኱থᆖၚ஢ଉ‫ײ‬LjᅺُLjሞ஢
ଉ‫ײ‬৛‫׉ݥ܈‬ዘᄲ‫ڦ‬ᆌᆩዐLjՂႷ༬՚ጀᅪ࿒‫܈‬ဣຕă૩
සLjएጚ‫ۉ‬უᇸ±10 ppm/°C‫ڦ‬࿒‫܈‬ဣຕॽ๑஢ଉ‫ײ‬ᅜ
±1 LSB/°C‫߀܈ޗڦ‬Վă
REF SOURCE
0.5V < REF < (VDD + 0.3V)
REF
AD7682/
AD7689
NO CONNECTION
REQUIRED
REFIN
TEMP
GND
07353-047
10μF
཮33. ྔևएጚ‫ۉ‬უᇸ
൩ጀᅪLjᆯᇀాևएጚ‫ۉ‬უ၌዆ሞ4.096 VLj๑ᆩ5 Vྔև
एጚ‫ۉ‬უᇸ้SNRႠీፌॅăSNRႠీই‫ऺڦ܈ײگ‬໙ࠅ
๕සူǖ
SNR LOSS
20 log
4.096
5
Rev. B | Page 21 of 32
AD7682/AD7689
‫ۉ‬ᇸ!
ٗएጚᇸྺADCࠃ‫!ۉ‬
AD7682/AD7689๑ᆩଇ߲‫ۉ‬ᇸᆅগǖఇెࢅຕጴాࢃ‫ۉ‬ᇸ
(VDD)ᅜतຕጴ๼෇/๼‫؜‬থ੨‫ۉ‬ᇸ(VIO)ăVIO੗ᅜᇑ1.8
V዁VDD‫ڦྷݔ‬ඪࢆஇड኱থথ੨ăྺ३ณ໯Ⴔ‫ۉڦ‬ᇸLj
VIOࢅVDDᆅগ੗ᅜ૶ሞᅃഐăAD7682/AD7689ዐVIOࢅ
VDD‫ۉڦ‬ᇸ้Ⴞ࿮࠲ăُྔLjኄၵഗॲሞ࢔੻‫ڦ‬ೕ୲‫ྷݔ‬
ా‫ۉܔ‬ᇸՎࣅ‫׉ݥ‬փ௺ߌLjස཮34໯๖ă
‫ܔ‬ᇀ०‫ڦڇ‬ᆌᆩLjᆯᇀ߾ፕ‫گ࢔ୁۉ‬LjAD7682/AD7689੗
ᅜ኱থ֑ᆩྔևएጚ‫ۉ‬უ‫ۉ‬ୟࠃ‫ۉ‬Lj཮36ߴ‫؜‬କᅃ߲૩
ጱăएጚ‫ۉ‬უ၍ୟ੗ᅜཚࡗᅜူ‫ݛ‬๕ൻ‫ۯ‬ǖ
t ኱থ֑ᆩဣཥ‫ۉ‬ᇸă
t ਏᆶፁࠕ‫ୁۉ‬๼‫ీ؜‬૰‫ڦ‬एጚ‫ۉ‬უᇸLj૩ස
ADR43x/ADR44xă
t एጚ‫ۉ‬უ࣐؋ഗLjසAD8605‫ڪ‬Lj໲ᄺీ‫ܔ‬ဣཥ‫ۉ‬ᇸ৊
ႜ୳հLjස཮36໯๖ă
75
70
65
5V
5V
10Ω
55
5V
50
10kΩ
1μF
AD8605
1μF
10μF
REF
40
VDD
VIO
AD7689
10
1
10k
1k
100
FREQUENCY (kHz)
07353-034
35
1OPTIONAL
཮34. PSRRᇑೕ୲‫࠲ڦ‬ဣ
10,000
VDD = 5V, INTERNAL REF
1000
100
VDD = 5V, EXTERNAL REF
10
VDD = 2.5V, EXTERNAL REF
1
VIO
0.1
10
100
1k
10k
SAMPLING RATE (SPS)
100k
1M
07353-040
0.010
0.001
REFERENCE BUFFER AND FILTER.
཮36. ᆌᆩ‫ۉ‬ୟ๖૩
AD7682/AD7689ሞ௅߲ገ࣑঩܎঳ຐ้ጲ‫܏࠲ۯ‬LjᅺُLj
߾ፕ‫ࡼࠀࢅୁۉ‬ᇑ֑ᄣ໏୲‫ׯ‬၍ႠԲ૩࠲ဣăኄ๑‫޿ڥ‬ഗ
ॲ‫׉ݥ‬๢ࢇ‫֑گ‬ᄣ໏୲)ฯ዁बࢍጦ*ࢅ‫ڦۉࠃ׾ۉ‬ᆌᆩă
OPERATING CURRENT (μA)
0.1μF
1
45
30
0.1μF
཮35. ߾ፕ‫ୁۉ‬ᇑ֑ᄣ໏୲‫࠲ڦ‬ဣ
Rev. B | Page 22 of 32
07353-035
PSSR (dB)
60
AD7682/AD7689
ຕጴথ੨!
AD7682/AD7689ದ ᆶ ᅃ ߲ ० ‫ ڦ ڇ‬4၍ থ ੨ Lj ᇑ SPIĂ
MICROWIRE™Ă QSPI™Ă ຕ ጴ ዷ ऐ ࢅ DSPग़ ඹ Lj ૩ ස
Blackfin® ADSP-BF53xĂSHARC®ĂADSP-219xࢅADSP-218xă
থ੨๑ᆩCNVĂDINĂSCKࢅSDO႑ࡽLjᆩᇀഔ‫ۯ‬ገ࣑‫ڦ‬
CNVᇑ࣮‫้܁‬Ⴞ࿮࠲Ljኄሞ‫گ‬۶‫֑ۯ‬ᄣईཞօ֑ᄣᆌᆩዐ
࢔ᆶᆩă
ᅃ߲14࿋स٪ഗCFG[13:0]ᆩᇀದዃADC‫ڦ‬ገ࣑ཚ‫ڢ‬Ăएጚ
‫ۉ‬უᇸ჋ስࢅഄ໲ᇮॲLjၘ൧֖९“ದዃस٪ഗLjCFG”և
‫ݴ‬ă
‫ړ‬CNVྺ‫ۉگ‬ೝ้Lj‫܁‬ൽ/ႀ෇੗ᅜ݀ิሞገ࣑঩܎Ă֑
ण঩܎ᅜतገ࣑ඇ‫֑)ײ‬णेገ࣑*Ljၘ९ᅜူ߳և‫ݴ‬ă
CFGጴሞമ14߲SCKฉืᄂ߸ႎLjገ࣑঳ࡕሞമ15߲)සࡕ
჋ስକ‫ݏ‬஬ఇ๕Ljሶྺ‫ڼ‬16߲*SCKူইᄂ๼‫؜‬ăසࡕ๑ీ
କCFG࣮‫܁‬Ljሶ࣏Ⴔᄲ14߲SCKူইᄂᅜ๼‫؜‬ᇑገ࣑঳ࡕ
၎࠲‫ڦ‬CFGጴLjCFG‫ڦ‬MSBথሞገ࣑঳ࡕ‫ڦ‬LSBኮࢫă
ླྀ४๑ᆩ‫૶ݥ‬ჄSCK้ዓLjᅺྺഗॲཚࡗCNVྺ‫ۉگ‬ೝઠ
჋ስLjSCKᅃ๑ీ৽ਸ๔ႀ෇ႎ‫ڦ‬ದዃጴժ๼‫؜‬ຕ਍ă
൩ጀᅪLjሞူ௬߳և‫ݴ‬ዐLj้Ⴞ཮՗๖ገ࣑೺क़‫ڦ‬ຕጴऄ
‫)ۯ‬SCKĂCNVĂDINĂSDO*ă‫ڍ‬๟Ljᆯᇀ੗ీ݀ิႠీ
ই‫گ‬൧઄Ljຕጴऄ‫ۯ‬ኻᆌ݀ิሞҾඇ‫ڦ‬ຕ਍‫܁‬ൽ/ႀ෇้क़
)tDATADžኮമǗAD7682/AD7689༵ࠃକৰ‫ۉٱ‬ୟLj੗ᅜၯኟ
ُ้क़ా‫ٱڦ‬ဃ࿋ăٗtDATA‫ڟ‬tCONV‫้ڦ‬क़ాሶփࣷ৊
ႜৰ‫ٱ‬Ljገ࣑঳ࡕ੗ీࣷԥ೦࣋ăᆩࢽᆌሞtDATAኮമದ
ዃAD7682/AD7689ժഔ‫ݏۯ‬஬ኸ๖)සႴᄲ*ăSCKईDINሞ
֑ᄣ้ਗ਼޹ৎሂദ้Ljᄺ੗ీࣷ೦֑࣋ᄣăᅺُLjሞCNV
ฉืᄂ‫ڦ‬ኮമ‫ٷ‬ሀ20 nsࢅኮࢫ10 nsLjॺᅱ๑ຕጴᆅগԍ‫׼‬
ҾৢǗኻᄲ੗ీLj৽ᆌ๑ᆩ‫૶ݥ‬ჄSCK้ዓLjՆ௨യሞ‫ڦ‬
Ⴀీই‫گ‬࿚༶ă
ገ࣑೺क़‫܁‬ൽ/ႀ෇Lj੺໏ዷऐ
‫ړ‬ሞገ࣑(n)೺क़ኴႜ‫܁‬ൽ/ႀ෇้Ljገ࣑঳ࡕ๟ฉᅃْ(n−
1)ገ࣑‫ڦ‬঳ࡕLjႀ෇CFGस٪ഗሶ๟ኍ‫ူܔ‬ᅃْ(n+1)֑ण
ࢅገ࣑ă
CNVՎྺߛ‫ۉ‬ೝᅜഔ‫ۯ‬ገ࣑ࢫLjՂႷ๑ഄምՎྺ‫ۉگ‬ೝLj
ᅜሎႹሞገ࣑೺क़ኴႜ‫܁‬ൽ/ႀ෇ă‫܁‬ൽ/ႀ෇‫ڦ‬পኹ้क़
ྺtDATALjُ้क़‫܌׉ݥ‬LjᅺُዷऐՂႷ๑ᆩ੺໏SCK้
ዓă
໯Ⴔ‫ڦ‬SCKೕ୲੗ཚࡗူ๕ऺ໙ǖ
tDATAᇑtCONVኮक़‫้ڦ‬क़ྺҾඇ้क़Lj೺क़փᆌ݀ิຕጴऄ
‫ۯ‬Lj‫ޏ‬ሶࣷ೦࣋௺ߌ‫ڦ‬࿋ಒ܏ă
ገ࣑ࢫ‫܁‬ൽ/ႀ෇Ljඪࢆ໏‫ڦ܈‬ዷऐ
‫ړ‬ሞገ࣑ኮࢫई֑ण঩܎(n)ኴႜ‫܁‬ൽ/ႀ෇้Ljገ࣑঳ࡕ
๟ฉᅃْ(n−1)ገ࣑‫ڦ‬঳ࡕLjႀ෇ሶ๟ኍ‫ူܔ‬ᅃْ(n+1)֑
णă
‫ܔ‬ᇀፌߛཾུ໏୲Ljྸᅃ‫้ڦ‬क़၌዆๟‫܁‬ൽ/ႀ෇ᆌ݀ิሞ
tACQ)ፌ‫้*܌‬क़ాă‫ܔ‬ᇀড஥‫ུཾڦ‬໏୲Lj้क़၌዆ᆯᆩࢽ
ᄲ൱‫ུཾڦ‬໏୲ਦۨLjዷऐ੗ᅜᅜඪࢆ໏‫܈‬ሏႜăᅺُLj
‫ܔ‬ᇀড஥‫ڦ‬ዷऐLjຕ਍‫ݡ‬࿚ՂႷ݀ิሞ֑ण঩܎ă
ገ࣑ඇ‫܁ײ‬ൽ0ႀ෇Ljඪࢆ໏‫ڦ܈‬ዷऐ!
‫ړ‬ሞገ࣑ඇ‫ײ‬ኴႜ‫܁‬ൽ/ႀ෇้Ljຕ਍‫ݡ‬࿚ਸ๔ᇀ‫ړ‬മ֑ण
(n)঩܎Ljժჽฦ዁ገ࣑(n)঩܎ăገ࣑঳ࡕ๟ฉᅃْ(n−1)
ገ࣑‫ڦ‬঳ࡕLjႀ෇CFGस٪ഗሶ๟ኍ‫ူܔ‬ᅃْ(n+1)֑णࢅ
ገ࣑ă
ᇑ ገ ࣑ ೺ क़ ‫ ܁‬ൽ /ႀ ෇ ၎ ຼ Lj ‫ ܁‬ൽ /ႀ ෇ ‫ ڦ‬প ኹ ้ क़ ྺ
tDATAă‫ܔ‬ᇀፌߛཾུ໏୲Ljྸᅃ‫้ڦ‬क़၌዆๟‫܁‬ൽ/ႀ෇ᆌ
݀ิሞtACQ + tDATA้क़ాă
‫ܔ‬ᇀড஥‫ུཾڦ‬໏୲Lj้क़၌዆ᆯᆩࢽᄲ൱‫ུཾڦ‬໏୲ਦ
ۨLjዷऐ੗ᅜᅜඪࢆ໏‫܈‬ሏႜăᇑ֑ण೺क़‫܁‬ൽ/ႀ෇၎
ຼLj‫ܔ‬ᇀড஥‫ڦ‬ዷऐLjຕ਍‫ݡ‬࿚ՂႷ݀ิሞ֑ण঩܎Lj੗
ᅜჽฦ዁ገ࣑঩܎ă
൩ጀᅪLjገ࣑ඇ‫ڦײ‬ຕ਍‫ݡ‬࿚ᄲ൱ॽCNVൻ‫ۯ‬዁ߛ‫ۉ‬ೝᅜ
ഔ‫ۯ‬ႎ‫ڦ‬ገ࣑LjCNVྺߛ‫ۉ‬ೝ้փሎႹ৊ႜຕ਍‫ݡ‬࿚ăᅺ
ُLj๑ᆩኄዖ‫้݆ݛ‬LjዷऐՂႷኴႜଇْ཭݀ຕ਍‫ݡ‬࿚ă
ದዃस٪ഗLjCFG
AD7682/AD7689૧ᆩᅃ߲14࿋ದዃस٪ഗ)CFG[13:0]Ljၘ
९՗10*ದዃ๼෇Ă‫ځ‬ገ࣑ཚ‫ڢ‬Ă‫ڇ‬ट‫୳ۅ‬հഗ‫੻ټ‬Ăएጚ
‫ۉ‬უᇸࢅཚ‫ڢ‬ႾଚഗăCFGस٪ഗཚࡗ14߲SCKฉืᄂ໮
٪ᇀDINฉ)MSBᆫံ*ăCFG߸ႎᇑՉᄂ၎࠲LjሎႹ๑ᆩᅴ
օईཞօዷऐă
Rev. B | Page 23 of 32
AD7682/AD7689
t
t
t
t
t
੗ᅜሞገ࣑೺क़Ă֑ण೺क़ई֑ण/ገ࣑ඇ‫ײ‬ႀ෇޿स٪
ഗLjस٪ഗ߸ႎሶ݀ิሞገ࣑঳ຐ้LjtCONV(ፌ‫ٷ‬ኵ)ăႀ
෇CFGस٪ഗ้ጺ๟٪ሞᅃ߲ศ‫܈‬ჽ‫׿‬ă൩ጀᅪLjฉ‫้ۉ‬
CFGस٪ഗ࿄ۨᅭLjႴᄲଇْჰገ࣑ᅜ߸ႎस٪ഗăැᄲ
ᇨेሜCFGस٪ഗྺ߾‫׍‬ยዃLjᆌ๑DIN‫ت‬ᇀߛ‫ۉ‬ೝժԍ
‫׼‬ଇْገ࣑‫้ڦ‬क़ăኄᄣLjCFG[13:0] = 0x3FFFLjُ้Lj
AD7682/AD7689‫ڦ‬ยዃසူǖ
13
CFG
12
INCC
11
INCC
10
INCC
9
INx
8
INx
IN[7:0]‫ڇ‬टႠLjᅜGNDྺ֖੊LjӀຩႾࠓ‫ׯ‬Ⴞଚ
‫ڇ‬ट‫୳ۅ‬հഗ๑ᆩඇ‫੻ټ‬
্ᆩాևएጚ‫ۉ‬უᇸ/࿒‫ߌد܈‬ഗLj๑ీ࣐؋ഗ
๑ీాևႾଚഗ
փ࣮‫܁‬CFGस٪ഗ
՗10ၘဦ௮ຎକದዃस٪ഗ߳࿋‫ీࠀڦ‬ă߸‫ܠ‬႑တ֖९“߾
ፕᇱ૙”և‫ݴ‬ă
7
INx
6
BW
5
REF
4
REF
3
REF
2
SEQ
՗10. ದዃस٪ഗ௮ຎ
࿋
[13]
ఁ‫!׬‬
CFG
[12:10]
INCC
௮ຎ
ದዃ߸ႎă
0 = ԍ‫ړ׼‬മ‫ڦ‬ದዃยዃă
1 = ޮ߃स٪ഗ‫ాڦ‬ඹă
๼෇ཚ‫ڢ‬ದዃă჋ስ࿁ມटႠĂ࿁ֶ‫ݴ‬Ăֶ‫ܔݴ‬Ă‫܋ڇ‬ई࿒‫ߌد܈‬ഗă֖९Đ๼෇ದዃđև‫ݴ‬ă!
࿋12
0
0
0
1
1
1
[9:7] ԡ INx
࿋11
0
1
1
0
1
1
࿋10
X1
0
1
X1
0
1
ࠀీ
ມटႠֶ‫ܔݴ‬ǗINx −ᅜVREF/2 ± 0.1 Vྺ֖੊ă
ມटႠǗINx −ᅜCOM = VREF/2 ± 0.1 Vྺ֖੊ă
࿒‫ߌد܈‬ഗă
‫ڇ‬टႠֶ‫ܔݴ‬ǗINx −ᅜGND ± 0.1 Vྺ֖੊ă
‫ڇ‬टႠǗINx ᅜCOM = GND ± 0.1 Vྺ֖੊ă
‫ڇ‬टႠǗInxᅜ GNDྺ֖੊ă
ᅜܾ৊዆‫ݛ‬๕჋ስ๼෇ཚ‫ڢ‬ă!
AD7682
࿋9
X1
X1
X1
X1
[6]
BW
[5:3]
REF
[2:1]
[0]
1
SEQ
RB
࿋8
0
0
1
1
AD7689
࿋7
0
1
0
1
ཚ‫ڢ‬
IN0
IN1
IN2
IN3
࿋9
0
0
…
1
࿋ 8
0
0
…
1
࿋ 7
0
1
…
1
ཚ‫ڢ‬
IN0
IN1
…
IN7
჋ስ‫گ‬ཚ୳հഗ‫੻ټڦ‬ă֖९“੗჋‫گ‬ཚ୳հഗ”և‫ݴ‬ă
0 = ¼‫੻ټ‬Lj๑ᆩ޹े‫ۉ૴ز‬ፆ੗৊ᅃօ၌዆ሯำ‫੻ټ‬ăፌߛཾུ໏୲ᄺՂႷই዁¼ă
1 = ඇ‫੻ټ‬ă
एጚ‫ۉ‬უᇸ0࣐؋ഗ჋ስă჋ስాևĂྔևईྔև࣐؋एጚ‫ۉ‬უLjժ๑ీೌా࿒‫ߌد܈‬ഗă
֖९Đएጚ‫ۉ‬უ๼‫؜‬0๼෇đև‫ݴ‬ă
࿋ 5
0
0
0
0
1
1
࿋ 4
0
0
1
1
1
1
࿋2
0
0
1
1
࿋1
0
1
0
1
࿋ 3
0
1
0
1
0
1
ࠀీ!
ాևएጚ‫ۉ‬უᇸLjREF = 2.5 V๼‫؜‬ă
ాևएጚ‫ۉ‬უᇸLjREF = 4.096 V๼‫؜‬ă
ྔևएጚ‫ۉ‬უᇸLj࿒‫ߌد܈‬ഗ๑ీă
ྔևएጚ‫ۉ‬უᇸLjాև࣐؋ഗLj࿒‫ߌد܈‬ഗ๑ీă
ྔևएጚ‫ۉ‬უᇸLj࿒‫ߌد܈‬ഗ্ᆩă
ྔևएጚ‫ۉ‬უᇸLjాև࣐؋ഗLj࿒‫ߌد܈‬ഗ্ᆩă
ཚ‫ڢ‬ႾଚഗăሎႹᅜIN0‫ڟ‬IN[7:0]‫ݛڦ‬๕෢௮ཚ‫ڢ‬ă֖९“ཚ‫ڢ‬Ⴞଚഗ”և‫ݴ‬ă
ࠀీ!
্ᆩႾଚഗă
Ⴞଚ෢௮೺क़߸ႎದዃă
෢௮IN0዁IN[7:0])ᆯCFG[9:7]ยዃ*Lj඗ࢫ෢௮࿒‫܈‬ă
෢௮IN0዁IN[7:0])ᆯCFG[9:7]ยዃ*ă
࣮‫܁‬CFGस٪ഗă
0 = ຕ਍঳ຐ้࣮‫ړ܁‬മದዃă
1 = փ࣮‫܁‬ದዃాඹă
x = ඪᅪă
Rev. B | Page 24 of 32
1
SEQ
0
RB
AD7682/AD7689
࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ!
‫ ړ‬CNVሞ EOCኮ ࢫ Վ ྺ ‫ ۉ گ‬ೝ ้ Lj SDOٗ ߛ ፆ ༀ Վ ྺ
MSBăSCKူইᄂ๼‫ٗ؜‬MSB − 1ਸ๔‫߲߳ڦ‬࿋ă
཮37၂๖କ໯ᆶෙዖఇ๕‫้ڦ‬Ⴞǖገ࣑೺क़‫܁‬ൽ/ႀ෇
(RDC)Ă ገ ࣑ ࢫ ‫ ܁‬ൽ /ႀ ෇ (RAC)ࢅ ገ ࣑ ඇ ‫ ܁ ײ‬ൽ /ႀ ෇
(RSC)ă൩ጀᅪLjCFGࢅຕ਍࣮‫ڦ܁‬჋ཚ਩ྺገ࣑঳ຐ
(EOC)ăገ࣑঳ຐ้LjසࡕCNVྺߛ‫ۉ‬ೝLjሶ‫ݏ‬஬ኸ๖ഗ
্ᆩă
සࡕ๑ᆩSPILjሶߵ਍้ዓटႠ(CPOL)ࢅ้ዓ၎࿋(CPHA)
ยዃ‫ڦ‬փཞLjSCK੣ှ้੗ᅜྺߛ‫ۉ‬ೝई‫ۉگ‬ೝă०‫ڦڇ‬
঴ਦӸ݆๟ସCPOL = CPHA = 0Ljස཮37໯๖Lj๑SCK੣ှ
้ྺ‫ۉگ‬ೝă
සമ࿔‫“ڦ‬ຕጴথ੨”և‫ݴ‬໯ຎLjຕ਍‫ݡ‬࿚‫ڦ‬পኹ้क़ྺҾ
ඇ‫ڦ‬ຕ਍‫܁‬ൽ/ႀ෇้क़tDATAăසࡕுᆶሞEOCኮമႀ෇ྜ
ኝ‫ڦ‬CFGጴLjሶCFGጴԥ۪ചLj‫ړ‬മದዃධ඗ᆶၳăසࡕ
ுᆶሞEOCኮമྜඇ‫؜܁‬ገ࣑঳ࡕLjሶገ࣑঳ࡕ۪฿Lj
ADCᅜ‫ړ‬മገ࣑‫ڦ‬MSB߸ႎSDOăၘဦ้Ⴞ֖९཮40ࢅ཮
41Ljഄዐ၂๖କገ࣑ඇ‫܁ײ‬ൽ/ႀ෇‫ڦ‬໯ᆶ้ႾဦবLjԈઔ
ॺ૬Ăԍ‫ࢅ׼‬SCKă
SOC
tCYC
POWER
UP
tCONV
CONVERSION
(n – 2) UNDEFINED
PHASE
࿮ஃࢆዖ‫܁‬ൽ/ႀ෇ఇ๕Ljฉ‫ۉ‬ኮࢫ‫ڦ‬മෙْገ࣑঳ࡕ‫ۼ‬๟
࿮ᅪᅭ‫ڦ‬LjᅺྺᆶၳCFG኱‫ڼڟ‬2߲EOCኮࢫ֍‫؜‬၄Ljᅺ
ܸႴᄲ2ْჰገ࣑ăཞᄣLjසࡕጒༀऐሞฉ‫ۉ‬ጒༀ೺क़ႀ
෇CFG)සRDC໯๖*Ljሶူᅃ߲঩܎Ⴔᄲዘႎႀ෇CFGस
٪ഗă൩ጀᅪLjሞ঩܎(n−1)ႀ෇CFGस٪ഗ้Lj‫ڼ‬ᅃ߲ᆶ
ၳຕ਍‫؜‬၄ሞ(n+1)঩܎ă
EOC
ACQUISITION
(n – 1) UNDEFINED
EOC
EOC
tDATA
CONVERSION
(n – 1) UNDEFINED
ACQUISITION
(n)
CONVERSION
(n)
EOC
ACQUISITION
(n + 1)
CONVERSION
(n + 1)
ACQUISITION
(n + 2)
NOTE 1
CNV
DIN
CFG (n)
XXX
CFG (n + 1)
CFG (n + 2)
RDC
SDO
SCK
DATA (n – 3)
XXX
MSB
XXX
1
MSB
XXX
DATA (n – 2)
XXX
16
1
DATA (n – 1)
XXX
16
MSB
(n)
16
1
MSB
(n + 1)
DATA (n)
16
1
NOTE 2
NOTE 1
CNV
CFG (n)
DIN
RAC
SDO
SCK
CFG (n + 1)
DATA (n – 2)
XXX
16
1
CFG (n + 2)
CFG (n + 3)
DATA (n)
DATA (n + 1)
DATA (n – 1)
XXX
1
16
1
1
16
NOTE 2
NOTE 1
CNV
RSC
DIN
CFG (n)
SDO
DATA (n – 2)
XXX
SCK
1
n
CFG (n)
DATA (n – 2)
XXX
n+1
16
1
CFG (n + 1)
CFG (n + 1)
DATA (n – 1)
XXX
DATA (n – 1)
XXX
n
n+1
16
1
CFG (n + 2)
CFG (n + 2)
CFG (n + 3)
DATA (n)
DATA (n)
DATA (n + 1)
n
n+1
16
1
n
NOTES
1. CNV MUST BE HIGH PRIOR TO THE END OF CONVERSION (EOC) TO AVOID THE BUSY INDICATOR.
2. A TOTAL OF 16 SCK FALLING EDGES ARE REQUIRED TO RETURN SDO TO HIGH-Z. IF CFG READBACK IS ENABLED, A TOTAL OF 30 SCK FALLING EDGES IS
REQUIRED TO RETURN SDO TO HIGH-Z.
཮37. ࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬AD7682/AD7689ཚᆩথ੨้Ⴞ
Rev. B | Page 25 of 32
07353-043
NOTE 2
AD7682/AD7689
ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ!
؋Ljܸኻ݀ໃ16߲SCK้Lj৽ࣷ݀ิኄዖ൧઄ǗᅺُLSB
ධ඗٪ሞăAD7682/AD7689‫ڦ‬ገ࣑ሯำྺ4 LSB‫ރރ‬ኵ)ई
߸‫*ٷ‬LjᅺُLSBሞ50%‫้ڦ‬क़ాྺ‫ۉگ‬ೝጒༀă‫ܔ‬ᇀSPIথ
੨LjSPIዷऐႴᄲ24߲SCKஞ؋Ljईኁ੗ᅜ๑ᆩQSPIথ੨ᅜ
Պ‫ײ‬17߲SCKஞ؋ă
཮38၂๖କ໯ᆶෙዖఇ๕‫้ڦ‬Ⴞǖገ࣑೺क़‫܁‬ൽ/ႀ෇
(RDC)Ă ገ ࣑ ࢫ ‫ ܁‬ൽ /ႀ ෇ (RAC)ࢅ ገ ࣑ ඇ ‫ ܁ ײ‬ൽ /ႀ ෇
(RSC)ă൩ጀᅪLjCFGࢅຕ਍࣮‫ڦ܁‬჋ཚ਩ྺገ࣑঳ຐ
(EOC)ăසമ࿔໯ຎLjຕ਍‫ݡ‬࿚‫ڦ‬পኹ้क़ྺҾඇ‫ڦ‬ຕ਍
‫܁‬ൽ/ႀ෇้क़tDATAăසࡕுᆶሞEOCኮമႀ෇ྜኝ‫ڦ‬
CFGጴLjሶCFGጴԥ۪ചLj‫ړ‬മದዃධ඗ᆶၳă
සࡕ๑ᆩSPILjሶߵ਍CPOLࢅCPHAยዃ‫ڦ‬փཞLjSCK੣
ှ้੗ᅜྺߛ‫ۉ‬ೝई‫ۉگ‬ೝă०‫ڦڇ‬঴ਦӸ݆๟ସCPOL =
CPHA = 1)཮ዐ࿄၂๖*Lj๑SCK੣ှ้ྺߛ‫ۉ‬ೝă
ገ࣑঳ຐ้LjසࡕCNVྺ‫ۉگ‬ೝLjሶ‫ݏ‬஬ኸ๖ഗ๑ీăُ
ྔLjྺኟඓׂิ‫ݏ‬஬ኸ๖LjዷऐՂႷ዁ณዃ࿋17߲SCKူ
ইᄂ֍ీ๑SDO‫ߛ࣮ݓ‬ፆༀLjᅺྺSDOฉ‫ڦ‬ፌࢫᅃ࿋ධ඗
ᆶၳăᇑ“࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ”և‫ݴ‬໯ຎ‫ڦ‬൧઄փ
ཞLjසࡕுᆶሞEOCኮമྜඇ‫؜܁‬ገ࣑঳ࡕLj๼‫ڦ؜‬ፌࢫ
ᅃ࿋ධ඗٪ሞăසࡕُ࿋ྺ‫ۉگ‬ೝLjሶ࿮ׂ݆ิ‫ݏ‬஬႑ࡽ
ኸ๖Ljᅺྺ‫ݏ‬஬႑ࡽኸ๖‫ิׂڦ‬Ⴔᄲߛፆༀईᅃ߲ߛ‫گڟ‬
‫ڦ‬࿋ገ࣑ă૩සLj‫ړ‬ᅃ߲SPIዷऐ๴၌ᇀ8࿋ई16࿋཭݀ஞ
START OF CONVERSION
(SOC)
tCYC
POWER
UP
PHASE
tCONV
CONVERSION
(n – 2) UNDEFINED
࿮ஃࢆዖ‫܁‬ൽ/ႀ෇ఇ๕Ljฉ‫ۉ‬ኮࢫ‫ڦ‬മෙْገ࣑঳ࡕ‫ۼ‬๟
࿮ᅪ‫ڦ‬LjᅺྺᆶၳCFG኱‫ڼڟ‬2߲EOCኮࢫ֍‫؜‬၄Ljᅺܸ
Ⴔᄲ2ْჰገ࣑ăཞᄣLjසࡕጒༀऐሞฉ‫ۉ‬ጒༀ೺क़ႀ෇
CFG)සRDC໯๖*Ljሶူᅃ߲঩܎Ⴔᄲዘႎႀ෇CFGस٪
ഗă൩ጀᅪLjሞ঩܎(n−1)ႀ෇CFGस٪ഗ้Lj‫ڼ‬ᅃ߲ᆶၳ
ຕ਍‫؜‬၄ሞ(n+1)঩܎ă
EOC
EOC
EOC
EOC
tDATA
CONVERSION
(n – 1) UNDEFINED
ACQUISITION
(n – 1) UNDEFINED
CONVERSION
(n)
ACQUISITION
(n)
CONVERSION
(n + 1)
ACQUISITION
(n + 1)
ACQUISITION
(n + 2)
NOTE 1
CNV
DIN
XXX
CFG (n)
CFG (n + 1)
CFG (n + 2)
RDC
DATA (n – 3)
XXX
SDO
SCK
1
DATA (n – 2)
XXX
1
17
DATA (n – 1)
XXX
1
17
DATA (n)
1
17
17
NOTE 2
CNV
RAC
NOTE 1
DIN
CFG (n)
SDO
SCK
CFG (n + 1)
1
17
1
CFG (n + 2)
DATA (n – 1)
XXX
DATA (n – 2)
XXX
CFG (n + 3)
DATA (n)
1
17
DATA (n + 1)
1
17
NOTE 2
RSC
NOTE 1
DIN
DATA (n – 2)
XXX
SDO
SCK
1
n
CFG (n + 2)
CFG (n + 1)
CFG (n)
DATA (n – 1)
XXX
DATA (n – 2)
XXX
n+1
17
1
n
DATA (n – 1)
XXX
n+1
17
1
NOTES
1. CNV MUST BE LOW PRIOR TO THE END OF CONVERSION (EOC) TO GENERATE THE BUSY INDICATOR.
2. A TOTAL OF 17 SCK FALLING EDGES ARE REQUIRED TO RETURN SDO TO HIGH-Z. IF CFG READBACK IS ENABLED,
A TOTAL OF 31 SCK FALLING EDGES IS REQUIRED TO RETURN SDO TO HIGH-Z.
཮38. ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬AD7682/AD7689ཚᆩথ੨้Ⴞ
Rev. B | Page 26 of 32
DATA (n)
DATA (n)
NOTE 2
n
CFG (n + 3)
n+1
17
DATA (n + 1)
1
07353-044
CNV
AD7682/AD7689
ཚ‫ڢ‬Ⴞଚഗ!
ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇”և‫ݴ‬ăᄺ੗ᅜሞ๑ీ‫ݏ‬஬ኸ๖ഗ
‫ڦ‬൧઄ူ๑ᆩႾଚഗLj้Ⴞၘ൧֖९“ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚ
ᆩ้Ⴞ”և‫ݏࡤ“ࢅݴ‬஬ኸ๖ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇”և
‫ݴ‬ă
AD7682/AD7689Ԉઔᅃ߲ཚ‫ڢ‬ႾଚഗLj੗ᆩᇀዘް෢௮ཚ
‫ڢ‬ăඓۨႾଚ‫ڦ‬ፌࢫᅃ߲ཚ‫ࢫڢ‬Ljᅜ‫܋ڇ‬ईֶ‫ڦܔݴ‬ႚ๕
෢௮ཚ‫ڢ‬Lj੗ᅜԈઔईփԈઔ࿒‫ߌد܈‬ഗă
ႾଚഗٗIN0ਸ๔LjᅜCFG[9:7]໯ยዃ‫ڦ‬IN[7:0]঳ຐă‫ܔ‬ᇀ
ֶ‫ܔݴ‬ཚ‫ڢ‬Ljཚ‫ڢ‬ದ‫ܔ‬ൽਦᇀCFG[9:7]ዐยዃ‫ڦ‬ፌࢫᅃ߲
ཚ‫ڢ‬ă൩ጀᅪLjሞႾଚഗఇ๕ူLjֶ‫ܔݴ‬ཚ‫ڦڢ‬ኟ๼෇๔
ዕྺ౾ຕཚ‫)ڢ‬IN0ĂIN2ĂIN4ĂIN6*Lj޶๼෇๔ዕྺആຕ
ཚ‫)ڢ‬IN1ĂIN3ĂIN5ĂIN7*ă૩සLjසࡕCFG[9:7] = 110ई
111Ljሶ෢௮໯ᆶֶ‫ܔݴ‬ཚ‫้ڢ‬Ljኟ๼෇ྺIN0ĂIN2ĂIN4
ࢅIN6ă
‫ܔ‬ᇀႾଚഗ֡ፕLjᆌሞฉ‫(ڦࢫۉ‬n−1)঩܎ยዃCFGस٪
ഗăሞ঩܎(n)LjႾଚഗยዃิၳժ֑णIN0ă‫ڼ‬ᅃ߲ᆶၳ
ገ࣑঳ࡕሞ঩܎(n+1)੗ᆩă‫ܔ‬CFG[9:7]໯ยዃ‫ڦ‬ፌࢫᅃ߲
ཚ‫ڢ‬ኴႜገ࣑ࢫLj๼‫ా؜‬և࿒‫ߌد܈‬ഗຕ਍(සࡕ๑ీ)Lj
඗ࢫምْ֑णIN0ă
๖૩!
໯ᆶཚ‫ڢ‬਩ԥದዃྺ‫ڇ‬टႠఇ๕ժᅜGNDྺ֖੊LjԈઔా
և࿒‫ߌد܈‬ഗLjሶႾଚഗӀᅜူຩႾ෢௮ཚ‫ڢ‬ǖ
CFG[2:1]ᆩᇀ๑ీႾଚഗăCFGस٪ഗ߸ႎࢫLjሞ‫؜܁‬࿋
13‫ڦ‬ຕ਍้DINՂႷ‫ت‬ᇀ‫ۉگ‬ೝLj‫ޏ‬ሶCFGस٪ഗࣷምْ
ਸ๔߸ႎă
IN0, IN1, IN2, IN3, IN4, IN5, IN6, IN7, TEMP, IN0, IN1, IN2,
…
൩ጀᅪLjᅜႾଚ‫ݛ‬๕߾ፕ้LjCFGस٪ഗ‫ڦ‬గၵ࿋੗ᅜ߀
Վă඗ܸLjසࡕ߸߀CFG[11])ֶ‫ܔݴ‬ई‫܋ڇ‬ཚ‫*ڢ‬ईCFG
[9:7])Ⴞଚዐ‫ڦ‬ፌࢫᅃ߲ཚ‫*ڢ‬LjႾଚॽዘႎ‫؛‬๔ࣅLjժሞ
CFGस٪ഗ߸ႎࢫገ࣑IN0)ईIN0/IN1ֶ‫*ܔݴ‬ă
සࡕ๟ֶ‫ܔݴ‬ཚ‫ڢ‬ժ๑ీాև࿒‫ߌد܈‬ഗLjሶႾଚഗӀᅜ
ူຩႾ෢௮ཚ‫ڢ‬ǖ
IN0, IN2, IN4, IN6, TEMP, IN0, …
཮39ၘဦ၂๖କ࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬໯ᆶෙዖఇ๕‫้ڦ‬Ⴞă߸
‫ܠ‬႑တ֖९“࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ”և‫“ࢅݴ‬࿮‫ݏ‬஬ኸ๖
SOC
tCYC
POWER
UP
EOC
tCONV
CONVERSION
(n – 2) UNDEFINED
PHASE
൩ጀᅪLjIN1ĂIN3ĂIN5ࢅIN7ᅜ֖੊‫ں‬ईVREF/2ྺ֖
੊Ljၘ൧֖९“๼෇ದዃ”և‫ݴ‬ă
ACQUISITION
(n – 1) UNDEFINED
EOC
EOC
tDATA
CONVERSION
(n – 1) UNDEFINED
ACQUISITION
(n), IN0
CONVERSION
(n), IN0
EOC
ACQUISITION
(n + 1), IN1
CONVERSION
(n + 1), IN1
ACQUISITION
(n + 2), IN2
NOTE 1
CNV
DIN
CFG (n)
XXX
RDC
SDO
SCK
DATA (n – 3)
XXX
MSB
XXX
1
MSB
XXX
DATA (n – 2)
XXX
1
16
2
DATA (n – 1)
XXX
16
MSB
IN0
16
1
MSB
IN1
DATA IN0
16
1
NOTE 2
CNV
CFG (n)
DIN
RAC
DATA (n – 2)
XXX
SDO
SCK
1
DATA (n – 1)
XXX
16
1
DATA IN0
16
1
DATA IN1
1
16
NOTE 2
CNV
DIN
CFG (n)
SDO
DATA (n – 2)
XXX
SCK
1
n
CFG (n)
DATA (n – 2)
XXX
n+1
16
DATA (n – 1)
XXX
1
n
DATA (n – 1)
XXX
n+1
16
DATA IN0
DATA IN0
1
n
n+1
16
DATA IN1
1
n
NOTE 2
NOTES
1. CNV MUST BE HIGH PRIOR TO THE END OF CONVERSION (EOC) TO AVOID THE BUSY INDICATOR.
2. A TOTAL OF 16 SCK FALLING EDGES ARE REQUIRED TO RETURN SDO TO HIGH-Z. IF CFG READBACK IS ENABLED,
A TOTAL OF 30 SCK FALLING EDGES IS REQUIRED TO RETURN SDO TO HIGH-Z.
཮39. ࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩཚ‫ڢ‬Ⴞଚഗ้Ⴞ
Rev. B | Page 27 of 32
07353-046
RSC
AD7682/AD7689
‫ړ‬AD7682/AD7689૶থ‫ڟ‬ඪࢆ๑ᆩSPIĂ‫ز‬ႜ‫܋‬੨ईFPGA
‫ڦ‬ዷऐ้Lj๑ᆩُఇ๕ă૶থ཮ස཮40໯๖Lj၎ᆌ‫้ڦ‬Ⴞ
ස཮41໯๖ă‫ܔ‬ᇀSPILjዷऐᆌ๑ᆩCPHA = CPOL = 0ă໯
๖‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇้ႾԈઔ“ຕጴথ੨”և‫ݴ‬໯ຎ‫ڦ‬໯
ᆶෙዖఇ๕ă‫ܔ‬ᇀُఇ๕LjዷऐՂႷߵ਍ገ้࣑क़৊ႜຕ
਍‫د‬๼ă‫ܔ‬ᇀ֑ᆩ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ዐ܏ൻ‫دۯ‬๼Lj֖९“ࡤ
‫ݏ‬஬ኸ๖ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇”և‫ݴ‬ă
‫؜‬၄ሞSDOฉăዷऐُ้࣏ՂႷ݀ໃCFGस٪ഗ‫ڦ‬MSB(ස
ᆶՂᄲ)LjᅜՍਸ๔߸ႎCFGăሞCNVྺ‫ۉگ‬ೝ೺क़LjCFG
߸ႎࢅຕ਍࣮‫܁‬਩ࣷ݀ิăമ14߲SCKฉืᄂᆩᇀ߸ႎ
CFGLjമ15߲SCKူইᄂٗMSB−1ਸ๔ደ࿋๼‫؜‬ገ࣑঳
ࡕăದዃࢅ‫܁‬ൽ‫ڦ‬၌዆๟ܾኁՂႷ݀ิሞူᅃْገ࣑‫ڦ‬
tDATA้क़๝ඁኮമăՂႷႀ෇໯ᆶ14࿋CFG[13:0]Lj‫ޏ‬ሶ
৽ࣷࢮ୼޿ኵăُྔLjසࡕுᆶሞtDATA๝ඁኮമ࣮‫܁‬16
࿋ገ࣑঳ࡕLjገ࣑঳ࡕ৽۪ࣷ฿ă
CNVฉืᄂഔ‫ۯ‬ገ࣑Ljഽ዆SDO৊෇ߛፆༀLjժࢮ୼DIN
ฉ٪ሞ‫ڦ‬ຕ਍ăഔ‫ۯ‬ገ࣑ࢫLj࿮ஃCNVྺࢆጒༀLjገ࣑‫ۼ‬
ࣷኴႜ‫ྺׯྜڟ‬ኹăCNVሞҾඇ‫ڦ‬ຕ਍‫د‬๼้क़tDATAኮ
മՂႷ‫ۉߛ࣮ݓ‬ೝLj඗ࢫԍ‫ۉߛ׼‬ೝ‫ڟ‬ገ้࣑क़tCONVኮ
ࢫLjᅜ௨ׂิ‫ݏ‬஬႑ࡽኸ๖ă
SDOຕ਍ሞSCK‫ڦ‬ฉืᄂࢅူইᄂ਩ᆶၳă໚඗ฉืᄂ੗
ᅜᆩᇀվጛຕ਍Lj‫ڍ‬๑ᆩSCKူইᄂ‫ڦ‬ຕጴዷऐీํ၄߸
੺‫܁ڦ‬ൽ໏୲Ljኻᄲ໲ਏᆶࢇ૙‫ڦ‬ԍ‫้׼‬क़ăሞ‫ڼ‬16߲(ई
‫ڼ‬30߲)SCKူইᄂኮࢫLjईኁ‫ړ‬CNVՎྺߛ‫ۉ‬ೝ้(ᅜፌ
ံ݀ิኁྺጚ)LjSDO‫ߛ࣮ݓ‬ፆༀă
ገ࣑ྜ‫ࢫׯ‬LjAD7682/AD7689৊෇֑ण঩܎ࢅ࠲܏ጒༀă
‫ړ‬ዷऐሞtCONV)ፌ‫ٷ‬ኵ*ኮࢫ๑CNVՎྺ‫ۉگ‬ೝ้LjMSB
සࡕ๑ీକCFG࣮‫܁‬Ljሶࣷሞገ࣑঳ࡕ‫ڦ‬LSBኮࢫᅜMSB
ᆫံ‫ݛ‬๕࣮‫܁‬ᇑገ࣑঳ࡕ၎࠲‫ڦ‬CFGस٪ഗăኄዖ൧઄
ူLjጺࠌႴᄲ30߲SCKူইᄂ֍ీ๑SDO‫ߛ࣮ݓ‬ፆༀă
࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇
CNV
SS
SDO
MISO
DIN
MOSI
SCK
SCK
FOR SPI USE CPHA = 0, CPOL = 0.
07353-036
DIGITAL HOST
AD7682/
AD7689
཮40. ࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬AD7682/AD7689૶থ཮
tCYC
> tCONV
tCONV
tCONV
tDATA
tDATA
tCNVH
EOC
EOC
RETURN CNV HIGH
FOR NO BUSY
RETURN CNV HIGH
FOR NO BUSY
CNV
tACQ
(QUIET
TIME)
CONVERSION (n – 1)
tSCK
tSCKH
SCK
14
UPDATE (n)
CFG/SDO
15
16/
30
1
CFG
LSB
DIN
X
tEN END CFG (n)
SDO
LSB + 1
tDIS
END DATA (n – 2)
tSDIN
CFG
MSB
X
MSB
tDIS
14
15
X
X
tHDIN
CFG
MSB – 1
BEGIN CFG (n + 1) tHSDO
tDSDO
tEN
LSB
2
16/
30
ACQUISITION
(n + 1)
UPDATE (n + 1)
CFG/SDO
SEE NOTE
tCLSCK
tSCKL
(QUIET
TIME)
CONVERSION (n)
ACQUISITION (n)
CFG
LSB
tEN
END CFG (n + 1)
SEE NOTE
MSB – 1
BEGIN DATA (n – 1)
LSB + 1
tDIS
NOTES
1. THE LSB IS FOR CONVERSION RESULTS OR THE CONFIGURATION REGISTER CFG (n – 1) IF
15 SCK FALLING EDGES = LSB OF CONVERSION RESULTS.
29 SCK FALLING EDGES = LSB OF CONFIGURATION REGISTER.
ON THE 16TH OR 30TH SCK FALLING EDGE, SDO IS DRIVEN TO HIGH IMPENDANCE.
཮41. ࿮‫ݏ‬஬ኸ๖ഗ‫ڦ‬AD7682/AD7689‫ز‬ႜথ੨้Ⴞ
Rev. B | Page 28 of 32
END DATA (n – 1)
LSB
tDIS
07353-037
ACQUISITION
(n - 1)
AD7682/AD7689
ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ0ႀ෇!
๔߸ႎCFGăሞCNVྺ‫ۉگ‬ೝ೺क़LjCFG߸ႎࢅຕ਍࣮‫܁‬
਩ࣷ݀ิăമ14߲SCKฉืᄂᆩᇀ߸ႎCFGस٪ഗLjമ16
߲SCKူইᄂٗMSBਸ๔ደ࿋๼‫؜‬ገ࣑঳ࡕăದዃࢅ‫܁‬ൽ
‫ڦ‬၌዆๟ܾኁՂႷ݀ิሞူᅃْገ࣑‫ڦ‬tDATA้क़๝ඁኮ
മăՂႷႀ෇໯ᆶ14࿋CFG[13:0]Lj‫ޏ‬ሶ৽ࣷࢮ୼޿ኵăُ
ྔLjසࡕுᆶሞtDATA๝ඁኮമ࣮‫܁‬16࿋ገ࣑঳ࡕLjገ࣑঳
ࡕ৽۪ࣷ฿ă
‫ړ‬AD7682/AD7689૶থ‫ڟ‬ඪࢆ๑ᆩSPIĂ‫ز‬ႜ‫܋‬੨ईFPGA
ժ‫ټ‬ዐ܏๼෇‫ڦ‬ዷऐ้Lj๑ᆩُఇ๕ă૶থ཮ස཮42໯
๖Lj၎ᆌ‫้ڦ‬Ⴞස཮43໯๖ă‫ܔ‬ᇀSPILjዷऐᆌ๑ᆩCPHA
= CPOL = 1ă໯๖‫ڦ‬ገ࣑ඇ‫܁ײ‬ൽ/ႀ෇้ႾԈઔ“ຕጴথ
੨և‫”ݴ‬໯ຎ‫ڦ‬໯ᆶෙዖఇ๕ă
CNVฉืᄂഔ‫ۯ‬ገ࣑Ljࢮ୼DINฉ٪ሞ‫ڦ‬ຕ਍ժഽ዆SDO
৊෇ߛፆༀăഔ‫ۯ‬ገ࣑ࢫLj࿮ஃCNVྺࢆጒༀLjገ࣑‫ࣷۼ‬
ኴႜ‫ྺׯྜڟ‬ኹăCNVሞҾඇ‫ڦ‬ຕ਍‫د‬๼้क़tDATAኮമՂ
Ⴗ‫ۉگ࣮ݓ‬ೝLj඗ࢫԍ‫ۉگ׼‬ೝ‫ڟ‬ገ้࣑क़tCONVኮࢫLjᅜ
ׂิ‫ݏ‬஬႑ࡽኸ๖ăገ࣑ྜ‫ࢫׯ‬LjSDOٗߛፆༀՎྺ‫ۉگ‬
ೝጒༀ(ຕ਍৽Ⴣ)LjॽSDOฉઙ‫ڟ‬VIOࢫLjSDO੗ᅜᆩᇀ
ዐ܏ዷऐᅜਸ๔ຕ਍‫د‬๼ă
SDOຕ਍ሞSCK‫ڦ‬ฉืᄂࢅူইᄂ਩ᆶၳă໚඗ฉืᄂ੗
ᅜᆩᇀվጛຕ਍Lj‫ڍ‬๑ᆩSCKူইᄂ‫ڦ‬ຕጴዷऐీํ၄߸
੺‫܁ڦ‬ൽ໏୲Ljኻᄲ໲ਏᆶࢇ૙‫ڦ‬ԍ‫้׼‬क़ăሞ੗჋‫ڼڦ‬
17߲(ई‫ڼ‬31߲)SCKူইᄂኮࢫLjSDO‫ߛ࣮ݓ‬ፆༀă൩ጀ
ᅪLjසࡕփ๑ᆩ੗჋‫ڦ‬SCKူইᄂLjሶ࿮݆ॠ֪‫ݏ‬஬༬
ႠLjၘ९“ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬ཚᆩ้Ⴞ”և‫ݴ‬ă
සࡕ๑ీକCFG࣮‫܁‬Ljሶࣷሞገ࣑঳ࡕ‫ڦ‬LSBኮࢫᅜMSB
ᆫံ‫ݛ‬๕࣮‫܁‬ᇑገ࣑঳ࡕ၎࠲‫ڦ‬CFGस٪ഗăኄዖ൧઄
ူLjጺࠌႴᄲ31߲SCKူইᄂ֍ీ๑SDO‫ߛ࣮ݓ‬ፆༀă
ገ࣑ྜ‫ࢫׯ‬LjAD7682/AD7689৊෇֑ण঩܎ࢅ࠲܏ጒༀă
ዷऐُ้ՂႷ݀ໃCFGस٪ഗ‫ڦ‬MSB(සᆶՂᄲ)LjᅜՍਸ
VIO
AD7682/
AD7689
DIGITAL HOST
SDO
MISO
IRQ
DIN
MOSI
SCK
SCK
07353-038
SS
CNV
FOR SPI USE CPHA = 1, CPOL = 1.
཮42. ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬AD7682/AD7689૶থ཮
tCYC
tCONV
tACQ
tDATA
tCNVH
tDATA
CNV
(QUIET
TIME)
CONVERSION (n – 1)
tSCK
tSCKH
15
SCK
UPDATE (n)
CFG/SDO
16
17/
31
15
16
17/
31
X
X
X
tHDIN
tSDIN
X
X
LSB
+1
END DATA (n – 2)
CFG
CFG
MSB MSB –1
X
tDIS
END CFG (n)
SDO
2
ACQUISITION
(n + 1)
UPDATE (n + 1)
CFG/SDO
SEE NOTE
1
tSCKL
DIN
(QUIET
TIME)
CONVERSION (n)
ACQUISITION (n)
BEIGN CFG (n + 1)
MSB
LSB
tEN
tHSDO
tDSDO
tEN
MSB
–1
BEGIN DATA (n – 1)
LSB
+1
tDIS
NOTES:
1. THE LSB IS FOR CONVERSION RESULTS OR THE CONFIGURATION REGISTER CFG (n – 1) IF
16 SCK FALLING EDGES = LSB OF CONVERSION RESULTS.
30 SCK FALLING EDGES = LSB OF CONFIGURATION REGISTER.
ON THE 17TH OR 31st SCK FALLING EDGE, SDO IS DRIVEN TO HIGH IMPENDANCE.
OTHERWISE, THE LSB REMAINS ACTIVE UNTIL THE BUSY INDICATOR IS DRIVEN LOW.
཮43. ࡤ‫ݏ‬஬ኸ๖ഗ‫ڦ‬AD7682/AD7689‫ز‬ႜথ੨้Ⴞ
Rev. B | Page 29 of 32
tDIS
END CFG (n + 1)
LSB
END DATA (n – 1) SEE NOTE
tEN
07353-039
CONVERSION
(n – 1)
AD7682/AD7689
ᆌᆩႷኪ!
քਆք၍!
AD7682/AD7689໯ሞ‫ڦ‬ᆇຘ‫ۉ‬ୟӱ(PCB)ᆌ֑ᆩఇెև‫ݴ‬
ᇑຕጴև‫ݴݴ‬૗ยऺLj‫ݴ‬՚၌዆ሞ‫ۉ‬ୟӱ‫ڦ‬ᅃۨ൶ᇘాă
AD7682/AD7689‫ڦ‬໯ᆶఇె႑ࡽ࿋ᇀፑ֨Lj໯ᆶຕጴ႑ࡽ
࿋ᇀᆸ֨Ljኄዖᆅগಇଚ੗ᅜ०ࣅยऺă
ፌࢫLjAD7682/AD7689‫ۉڦ‬ᇸVDDࢅVIOᆌཚࡗ༩ٍ‫ۉ‬ඹ
ඁ᳘Ljഄኵཚ‫ྺ׉‬100 nFLj੍ৎAD7682/AD7689‫ݣ‬ዃLjժ
ᆩ‫ڦ੻ܸ܌‬ጽ၍૶থLjᅜ༵ࠃ‫گ‬ፆੇୟ০ժ३ၭ‫ۉ‬ᇸ၍ୟ
ฉ‫ڦ‬றِሯำᆖၚă
Ն௨ሞഗॲူ‫ݛ‬քยຕጴ၍ୟLj‫ޏ‬ሶࣷॽሯำ᳘ࢇ዁ႊೌ
࠶ႊLj‫ݥأ‬ሞAD7682/AD7689ူ‫ݛ‬೬ᅃ߲‫֫ں‬ᆩፕೡԸă
ዮසCNVई้ዓኮૌ‫੺ڦ‬໏ൎ࣑႑ࡽփᆌ੍ৎఇె႑ࡽୟ
০ăՆ௨ຕጴ႑ࡽᇑఇె႑ࡽ‫ز‬ඡă
AD7682/AD7689Ⴀీೠࠚ
዁ณᆌ๑ᆩᅃ߲থ‫֫ں‬ăຕጴࢅఇెև‫ݴ‬੗ᅜࠌᆩई‫ߪݴ‬
๑ ᆩ থ ‫ ֫ ں‬ă ‫ ܔ‬ᇀ ࢫ ᅃ ዖ ൧ ઄ Lj থ ‫ ֫ ں‬ᆌ ሞ AD7682/
AD7689ူ‫૶ݛ‬থă
AD7682/AD7689ೠࠚӱ(EVAL-AD7682EDZ/ EVAL-AD7689
EDZ)‫ڦ‬࿔‫ڗ‬ዐߴ‫؜‬କഄ໲ླྀ४‫ڦ‬քਆք၍ăೠࠚӱ༫ॲԈ
ઔጎದྜ฀൐ঢ়ࡗ֪๬‫ڦ‬ೠࠚӱĂ࿔‫ڗ‬ᅜतᆩᇀٗPCཚࡗ
ገ࣑ഗࢅೠࠚਸ݀ຕ਍֑णӱEVAL-CED1Z੦዆ೠࠚӱ‫ڦ‬
෉ॲă
AD7682/AD7689‫ڦ‬एጚ‫ۉ‬უ๼෇REFਏᆶ‫ۯ‬ༀ๼෇ፆੇLj
ᆌ৊ႜඁ᳘Ljժ๑सิ‫ߌۉ‬ፌၭăํ၄‫݆ݛ‬๟ॽएጚ‫ۉ‬უ
ᇸ‫ڦ‬ඁ᳘༩ٍ‫ۉ‬ඹ੍ৎ)૙ၙ൧઄๟ኟ‫*ܔ‬REFࢅGNDᆅগ
‫ݣ‬ዃLjժᆩড੻‫گڦ‬ፆੇጽ၍৊ႜ૶থă
Rev. B | Page 30 of 32
AD7682/AD7689
ྔႚ؅٫
0.60 MAX
4.00
BSC SQ
0.60 MAX
15
PIN 1
INDICATOR
20
16
1
PIN 1
INDICATOR
3.75
BSC SQ
0.50
BSC
2.65
2.50 SQ
2.35
EXPOSED
PAD
(BOTTOM VIEW)
5
10
1.00
0.85
0.80
12° MAX
SEATING
PLANE
0.25 MIN
0.80 MAX
0.65 TYP
0.30
0.23
0.18
FOR PROPER CONNECTION OF
THE EXPOSED PAD, REFER TO
THE PIN CONFIGURATION AND
FUNCTION DESCRIPTIONS
SECTION OF THIS DATA SHEET.
0.05 MAX
0.02 NOM
COPLANARITY
0.08
0.20 REF
COMPLIANT TO JEDEC STANDARDS MO-220-VGGD-1
090408-B
0.50
0.40
0.30
TOP VIEW
6
11
཮44. 20ᆅগLFCSP_VQ‫ހ‬ጎLj
4 mm x 4 mm຺‫גݛ‬ԋ༹
(CP-20-4)Lj؅٫‫ڇ‬࿋ǖmm
۩ࠔኸళ!
႙ࡽ
AD7682BCPZ1
AD7682BCPZRL71
AD7689ACPZ 1
AD7689ACPZRL71
AD7689BCPZ1
AD7689BCPZRL71
EVAL-AD7682EDZ1
EVAL-AD7689EDZ1
EVAL-CED1Z 2
1
2
ओ‫ݥݴ‬၍Ⴀ(INL)
ፌ‫ٷ‬ኵ±2 LSB
ፌ‫ٷ‬ኵ±2 LSB
ፌ‫ٷ‬ኵ±6 LSB
ፌ‫ٷ‬ኵ±6 LSB
ፌ‫ٷ‬ኵ±2 LSB
ፌ‫ٷ‬ኵ±2 LSB
࿮฿ஓ
16 ࿋
16 ࿋
15 ࿋
15 ࿋
16 ࿋
16 ࿋
࿒‫ྷݔ܈‬
−40°C ዁ +85°C
−40°C ዁ +85°C
−40°C ዁ +85°C
−40°C ዁ +85°C
−40°C ዁ +85°C
−40°C ዁ +85°C
‫ࢇޙ‬RoHSՔጚ‫ڦ‬ग़ඹഗॲă
ُ੦዆ഗӱሎႹPC‫ܔ‬໯ᆶ‫ټ‬EDࢫጘ‫ڦ‬ADIೠࠚӱ৊ႜ੦዆ժᇑኮཚ႑ă
Rev. B | Page 31 of 32
‫ހ‬ጎ௮ຎ
20ᆅগQFN (LFCSP_VQ)
20ᆅগQFN (LFCSP_VQ)
20ᆅগQFN (LFCSP_VQ)
20ᆅগQFN (LFCSP_VQ)
20ᆅগQFN (LFCSP_VQ)
20ᆅগQFN (LFCSP_VQ)
ೠࠚӱ
ೠࠚӱ
ገ࣑ഗೠࠚᇑਸ݀ӱ
‫ހ‬ጎ჋ၜ
CP-20-4
CP-20-4
CP-20-4
CP-20-4
CP-20-4
CP-20-4
۩ࠔຕଉ
ਝಎLj490
ਝ‫ټ‬Lj1,500
ਝಎLj490
ਝ‫ټ‬Lj1,500
ਝಎLj490
ਝ‫ټ‬Lj1,500
AD7682/AD7689
ጀ๥!
©2008–2009 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D07353-0-6/09(B)
Rev. B | Page 32 of 32
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