datasheet for AK2921T by Asahi Kasei Microdevices

datasheet for AK2921T by Asahi Kasei Microdevices
[AK2921]
AK2921
Zero Drift operational amplifiers
Feature
AK2921 is the dual channel CMOS operational amplifires which is available to output with very low input offset
voltage (+/- 1.0μV) and near zero input offset dirft.
It’s operated with very small current consumptions, 260μA typ./ch (VDD:5.0V), which is available to operate full
swing signals in output.
AK2921 is appropriated to Sensor Pre Amp. applications.
̊ Low Voltage, Single Supply Operation : 1.6V - 5.5V
̊ Very Low Input Offset Voltage : +/- 1.0μV typ.
̊ Near Zero Dirft over time and temperature : +/- 5.0nV/°C typ.
̊ Full Swing Outputs to 10kΩ Load
̊ Power Supply Current : 260μA typ./ch (VDD: 5.0V, No Load)
̊ Gain Bandwidth : 0.8MHz typ.
̊ Package : TMSOP8
Part Name
AK2921T
Channel Number
2
Package
TMSOP8
Pin Location
1:OUTA
2:NINA
8:VDD
A
7:OUTB
B
3:PINA
4:VSS
6:NINB
5:PINB
TMSOP8
(AK2921T)
Rev.1.00Ea
2012/4
-1-
[AK2921]
Pin Function Descriptions
Pin number
1
2
3
4
5
6
7
8
Name
OUTA
NINA
PINA
VSS
PINB
NINB
OUTB
VDD
I/O note)
AO
AI
AI
PWR
AI
AI
AO
PWR
Function
Amplifier A Output
Amplifier A Inverted Input
Amplifier A No Inverted Input
Power Supply Ground
Amplifier B No Inverted Input
Amplifier B Inverted Input
Amplifier B Output
Positive Power Supply
Note)
PWR
AI
AO
: Power Supply
: Analog Input
: Analog Output
Absolute Maximum Ratings
Parameter
Supply Voltage
Input Voltage
Input Current
Storage Temperature Range
Symbol
VDD
VTD
IIN
Tstg
Min
-0.3
-0.3
-10
-55
Max
6.5
VDD + 0.3
+10
150
VSS=0V ; Note
Units
V
V
mA
°C
Note : All voltage with respect to ground
WARNING :
Operational at or beyond these limits may result in permanent damage to the device. Normal operation is not
guaranteed at these extremes.
Recommended Operating Conditions
Parameter
Operationg Temperature Range
Supply Voltage
Minimum Gain
Power Supply Current
Symbol
Ta
VDD
Av
Idd1
Min.
-40
2.7
1
Typ.
Max.
85
5.5
0.26
0.6
Units
°C
V
V/V
mA./ch
Conditions
VDD=5.0V,No Load
Note : When the gain is adjusted to one or less , there is a possibility that operation becomes unstable.
*We asuumes no responsibility for the usage beyond the conditions in this datasheet.
Rev.1.00Ea
2012/4
-2-
[AK2921]
Electrical Characteristics
̊ DC Characteristics
Parameter
Input Voltage Offset
Input Voltage Offset Drift
Input Bias Current
Input Common Mode Range
Min.
Output Voltage Swing
Common Mode Rejection Ratio
Power Supply Rejection Ratio
Large Signal Voltage Gain
Short Circuit Current
Output Current
100
100
110
VDD:5V, Ta:-40 to 85°C, unless otherwise noted
Typ.
Max. Units
Conditions
+/- 1
+/- 20
μV
+/- 5
+/- 100 nV/°C
+/- 20
pA
0.0 –
V
VDD-0.2
0.03 –
V RL ≥10kΩ connected to VDD/2
VDD-0.03
130
dB
120
dB
130
dB RL ≥10kΩ connected to VDD/2
+/- 85
mA
+/- 35
mA
̊ AC Characteristics
Parameter
Gain Bandwidth
Slew Rate
Input Voltage Noise
0.1 – 10Hz
0.1 – 1Hz
Overload Recovery Time
Input Capacitance Differential
Common Mode
Maximum Capacitance Loads
Min.
Typ.
0.8
1
100
2.1
0.7
0.04
1.5
6
Rev.1.00Ea
VDD:5V, Ta:-40 to 85°C, unless otherwise noted
Max. Units
Conditions
MHz Av:1V/V
V/μs Av:1V/V
nVrms f:1kHz
/ Hz
μVpp
μVpp
msec Av:50V/V
pF
PF
150
pF
2012/4
-3-
[AK2921]
Typical Operating Characteristics
̊ Supply Current vs. Temperature (Vin:1/2VDD)
IDD - Temperature
1000
IDD [ A]
800
600
400
1.6V
200
5V
0
-40
-20
0
20
40
60
80
Temperature [ ]
̊ Supply Current vs. Supply Voltage (Vin:1/2VDD)
IDD - VDD
(Ta = 25 )
1000
IDD [ A]
800
600
400
200
0
0
1
2
3
4
5
6
Supply Voltage [V]
Rev.1.00Ea
2012/4
-4-
[AK2921]
̊ Output voltage vs. Load current
(VDD=1.6V, Ta=25°C)
̊ Output voltage vs. Load current
(VDD=5V, Ta=25°C)
Isource/Isink - VOH/VOL
Isource / Isink - VOH / VOL
5
1.6
1.4
4
VOH / VOL [V]
VOH / VOL [V]
1.2
1
0.8
0.6
0.4
source
3
2
source
1
sink
0.2
sink
0
0
0
2
4
6
8
0
10
20
40
̊ Closed loop gain vs. Frequency
(VDD=1.6V, Ta=25°C)
70
60
60
C lo sed lo o p g ain [d B ]
C lo sed lo o p g ain [d B ]
50
Av = 100, RL=2k
40
Av = 10, RL=2k
20
10
Av = 1, RL=2k
0
30
10
-20
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
Frequency [Hz]
Av = 1, RL=2k
0
-20
1.E+02
Av = 10, RL=2k
20
-10
1.E+01
Av = 100, RL=2k
40
-10
-30
1.E+00
100
Closed loop gain
70
30
80
̊ Closed loop gain vs. Frequency
(VDD=5V, Ta=25°C)
Closed loop gain
50
60
Isource / Isink [mA]
Isource / Isink [mA]
-30
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
Frequency [Hz]
Rev.1.00Ea
2012/4
-5-
[AK2921]
̊ Open loop gain and Phase vs. Frequency
(VDD=1.6V, Ta=25°C)
̊ Open loop gain and Phase vs. Frequency
(VDD=5V, Ta=25°C)
Open loop gain and Phase vs. Frequency
Open loop gain and Phase vs. Frequency
60
180
Gain
50
180
Gain
50
135
30
45
20
0
10
-45
0
-90
-20
1.E+03
Op en lo o p g ain [d B ]
90
Ph a se [d e g ree s]
O p e n lo o p g a in [d B ]
40
-135
-10
1.E+04
1.E+05
40
90
30
45
20
0
10
-45
0
-90
-10
-180
1.E+07
1.E+06
-20
1.E+03
-135
1.E+04
Frequency [Hz]
-180
1.E+07
1.E+06
̊ Output impedance vs. Frequency
(VDD=5V, Ta=25°C)
Output impedance vs. Frequency
Output impedance vs. Frequency
500
350
AV=1
AV=1
300
AV=10
AV=10
AV=100
AV=100
Ou tp
u t im p ed an ce [ ]
Output
impedance[Ω]
Output
Ou tpimpedance[Ω]
u t im p ed a n ce [ ]
1.E+05
Frequency [Hz]
̊ Output impedance vs. Frequency
(VDD=1.6V, Ta=25°C)
400
135
Phase
Phase
Ph ase [d eg rees]
60
300
200
100
250
200
150
100
50
0
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
1.E+07
Frequency [Hz]
0
1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
1.0E+06
1.0E+07
Frequency [Hz]
Rev.1.00Ea
2012/4
-6-
[AK2921]
̊ Large signal transient response
(VDD/VSS = +0.8V/- 0.8V,
Ta = 25°C, CL = 150pF)
̊ Large signal transient response
(VDD/VSS = +2.5V/-2.5V
Ta = 25°C, CL = 150pF)
Large sigmnal transient response
1
4
0. 75
3
Output voltage (1V/div)
Output voltage (0.25V/div)
La rge sigmnal transient response
0 .5
0. 25
0
-0. 25
-0 .5
2
1
0
-1
-2
-0. 75
-3
-1
-4
TIME (4 s/DIV)
TIME (4 s/DIV)
̊ Small signal transient response
(VDD/VSS = +0.8V/- 0.8V,
Ta = 25°C, CL = 150pF)
̊ Small signal transient response
(VDD/VSS = +2.5V/-2.5V
Ta = 25°C, CL = 150pF)
Small sigmna l tra nsient response
0 .2
0 .2
0. 15
0. 15
Output voltage (50mV/div)
Output voltage (50mV/div)
Small sigmnal transient response
0 .1
0. 05
0
-0. 05
-0 .1
-0. 15
0 .1
0. 05
0
-0. 05
-0 .1
-0. 15
-0 .2
-0 .2
TIME (4 s/DIV)
TIME (4 s/DIV)
Rev.1.00Ea
2012/4
-7-
[AK2921]
̊ Small signal overshoot vs. Load Capacitance
(VDD=1.6V, Ta=25°C)
̊ Small signal overshoot vs. Load Capacitance
(VDD=5V, Ta=25°C)
Small signal overshoot vs. Loadcapacitance
Small signal overshoot vs. Loadcapacitance
50
50
45
OS
40
OS
OS
40
OS
35
Overshoot [% ]
Overshoot [% ]
35
45
30
25
20
30
25
20
15
15
10
10
5
5
0
0
1
10
100
1000
1
10
Load capacitance [pF]
100
1000
Load capacitance [pF]
̊ Positive overvoltage recovery
(VDD/VSS = +2.5V/-2.5V, Ta = 25°C)
̊ Negative overvoltage recovery
(VDD/VSS = +2.5V/-2.5V, Ta = 25°C)
Negative overvoltage recovery
Positive overvoltage recovery
Av = -50V
RL=10k
Input = 50mV/DIV
Voltage [V]
Voltage [V]
Input = 50mV/DIV
Output = 1V/DIV
Av = -50V
RL=10k
Output = 1V/DIV
Time (10 sec/DIV)
Time (10 sec/DIV)
Rev.1.00Ea
2012/4
-8-
[AK2921]
̊ Common Mode Rejection Ratio vs. Frequency
CMRR
160
140
1.6V
5.0V
C M R R [dB ]
120
100
80
60
40
20
0
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
Frequency [Hz]
̊ Power Supply Rejection Ratio vs. Frequency
(VDD=1.6V, Ta=25°C)
̊ Power Supply Rejection Ratio vs. Frequency
(VDD=5V, Ta=25°C)
PSRR
PSRR
140
140
5.0V_VDD
1.6V_VDD
120
120
5.0V_VSS
1.6V_VSS
100
PSRR (dB )
PSR R [d B ]
100
80
60
80
60
40
40
20
20
0
1.E+00
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
0
1.E+00
1.E+06
Frequency [Hz]
1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
1.E+06
Frequency (Hz)
Rev.1.00Ea
2012/4
-9-
[AK2921]
̊ Power Supply Rejection Ratio vs. Temperature
PSRR - Temperature
1 30
1 20
PSRR [dB]
1 10
1 00
90
80
70
60
50
-40
-20
0
20
40
Temperature [
60
80
]
̊ Maximum output swing vs. Frequency
(VDD=1.6V, Ta=25°C, Av = 1, RL = 10kΩ)
̊ Maximum output swing vs. Frequency
(VDD=5V, Ta=25°C, Av = 1, RL = 10kΩ)
Maximum output swing
Maximum output swing
6
Maximum output swing [V]
Maximum output swing [V]
2
1 .6
1 .2
0 .8
0 .4
0
1.E +0 1
5
4
3
2
1
0
1 .E+02
1.E +0 3
1 .E+04
1.E +0 5
1 .E+06
1.E +0 7
Frequency [Hz]
1 .E+01
1.E+02
1.E +03
1. E+04
1.E+05
1.E+06
1.E +0 7
Frequency [Hz]
Rev.1.00Ea
2012/4
- 10 -
[AK2921]
̊ Voltage noise density
(VDD=1.6V, Ta=25°C, f=0~2.5kHz)
̊ Voltage noise density
(VDD=5V, Ta=25°C, f=0~2.5kHz)
Voltage noise density
2 00
2 00
1 80
1 80
Voltage noise density[nV/ Hz]
Voltage noise density[nV/ Hz]
Voltage noise density
1 60
1 40
1 20
1 00
80
60
40
20
1 60
1 40
1 20
1 00
80
60
40
20
0
0
0
500
1 000
15 00
20 00
250 0
0
500
Frequency [Hz]
15 00
20 00
250 0
400 00
500 00
Frequency [Hz]
̊ Voltage noise density
(VDD=1.6V, Ta=25°C, f=0~20kHz)
̊ Voltage noise density
(VDD=5V, Ta=25°C, f=0~50kHz)
Voltage noise density
(f=0 50kHz)
Volta ge noise density
(f=0 50kHz)
2 00
2 00
1 80
1 80
Voltage noise density [nV/ Hz]
Voltage noise density [nV/ Hz]
1 000
1 60
1 40
1 20
1 00
80
60
40
20
1 60
1 40
1 20
1 00
80
60
40
20
0
0
0
100 00
200 00
300 00
400 00
5000 0
0
10 000
200 00
300 00
Frequency [Hz]
Frequency [Hz]
Rev.1.00Ea
2012/4
- 11 -
[AK2921]
̊ Voltage noise density
(VDD=5V, Ta=25°C, f=1~10kHz)
Voltage noise density
(f=1 10kHz)
Voltage noise density [nV/ Hz]
1 000
100
10
1. E+00
1 .E+01
1.E+02
1.E+03
1.E +0 4
Frequency [Hz]
̊ Voltage noise
(VDD=1.6V, Ta=25°C, f=0.1~10Hz)
̊ Voltage noise
(VDD=5V, Ta=25°C, f=0.1~10Hz)
0.1Hz to 10Hz Noise
0.1Hz to 10Hz Noise
3
3
Vn=2.3µVpp
2
1
1
Voltage [ V]
Voltage [ V]
Vn=1.8µVpp
2
0
0
-1
-1
-2
-2
-3
-3
TIME (sec)
TIME (sec)
Rev.1.00Ea
2012/4
- 12 -
[AK2921]
̊ Output short-circuit current vs. Temperature
(VDD=1.6V, Ta=-40 to 85°C)
̊ Maximum output swing vs. Frequency
(VDD=5V, Ta=25°C, Ta=-40 to 85°C)
Output short-circuit current
Output short-circuit current
100
30
Isc+
80
Isc-
20
Ou tp u t sh o rt-circu it cu rren t [mA]
Ou tp u t sh o rt-circu it cu rren t [m A]
Isc+
10
0
-10
-20
Isc-
60
40
20
0
-20
-40
-60
-80
-100
-30
-40
-20
0
20
40
60
-40
80
-20
0
20
40
60
80
Temperature [ ]
Temperature [ ]
̊ Input offset voltage drift(VDD=5V, Ta=25°C, Ta=-40 to 85°C)
Input offset voltage drift
50
45
Number of amplifiers
40
35
30
25
20
15
10
5
0
-20
-15
-10
-5
0
5
10
15
20
Input offset Voltage drift [nV/ ]
Rev.1.00Ea
2012/4
- 13 -
[AK2921]
Package
1. Marking
1.1 TMSOP8
8
7
6
5
(1) Pin Number 1 indication mark
(2) Part Number
(3) Date Code (Year)
(4) Date Code (Month)
(5) Lot Number
920
(2)
YMA
(1)
(3) (4) (5)
1
2
3
4
2. Outline Dimensions
2.1 TMSOP8 Package Outline
(UNIT:mm)
0.127 +0.1
-0.05
0.55±0.2
2.8
4.0±0.2
2.9 +0.12
-0.1
0.95MAX
1
0.65
+0.1
0.1 -0.05
0~10°
0.1
0.2±0.05
0.1 M
Rev.1.00Ea
2012/4
- 14 -
[AK2921]
IMPORTANT NOTICE
These products and their specifications are subject to change without notice.
When you consider any use or application of these products, please make inquiries the sales office of
Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current status of
the products.
Descriptions of external circuits, application circuits, software and other related information contained
in this document are provided only to illustrate the operation and application examples of
the semiconductor products. You are fully responsible for the incorporation of these external
circuits, application circuits, software and other related information in the design of your
equipments. AKM assumes no responsibility for any losses incurred by you or third parties arising from
the use of these information herein. AKM assumes no liability for infringement of any patent,
intellectual property, or other rights in the application or use of such information contained herein.
Any export of these products, or devices or systems containing them, may require an export license or
other official approval under the law and regulations of the country of export pertaining to customs
and tariffs, currency exchange, or strategic materials.
AKM products are neither intended nor authorized for use as critical componentsNote1) in any safety,
life support, or other hazard related device or systemNote2), and AKM assumes no responsibility for
such use, except for the use approved with the express written consent by Representative Director of
AKM. As used here:
Note1) A critical component is one whose failure to function or perform may reasonably be expected to
result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system
containing it, and which must therefore meet very high standards of performance and reliability.
Note2) A hazard related device or system is one designed or intended for life support or maintenance of
safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to
function or perform may reasonably be expected to result in loss of life or in significant injury or damage to
person or property.
It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of, or
otherwise places the product with a third party, to notify such third party in advance of the above
content and conditions, and the buyer or distributor agrees to assume any and all responsibility and
liability for and hold AKM harmless from any and all claims arising from the use of said product in
the absence of such notification.
Rev.1.00Ea
2012/4
- 15 -
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