Si4825-A10 - Silicon Labs

Si4825-A10 - Silicon Labs
Si 4 8 2 5 - A10
B R O A D C A S T M E C H A N I C A L TU N I N G A M / F M / S W R A D I O R EC EIVER
Features







Worldwide FM band support
(64–109 MHz)
Worldwide AM band support
(504–1750 kHz)
SW band support
(2.3–28.5 MHz)
No manual alignment necessary
Mono audio output
Selectable support AM/FM/SW
regional bands
Enhanced FM/SW band coverage
Automatic frequency control (AFC)
Integrated LDO regulator
 2.0 to 3.6 V supply voltage
 Wide range of ferrite loop sticks and
air loop antennas supported
 16-pin SOIC
 RoHS-compliant
 Direct volume control
 Not EN55020 compliant*
*Note: For consumer applications that
require EN 55020 compliance,
use Si483x.


Ordering Information:
See page 14.
Applications
Pin Assignments
Table and portable radios
Mini/micro systems
 CD/DVD players
 Boom boxes
Modules
Clock radios
 Mini HiFi
 Entertainment systems




Si4825-A10 (SOIC)
16
AOUT
2
15
GND
3
14
VDD
4
13
XTALI
NC
5
12
XTALO
FMI
6
11
VOL-
RFGND
7
10
VOL+
8
9
RST
TUNE1
The Si4825 is the entry level mechanical-tuned digital CMOS AM/FM/SW radio
receiver IC that integrates the complete receiver function from antenna input to
audio output. The Si4825 extends Silicon Laboratories multi-band tuner family,
and further increases the ease and attractiveness of design radio reception to
audio devices through small size and board area, minimum component count, and
superior, proven performance. The Si4825 requires a simple application circuit
and removes any requirements for manually tuning components during the
manufacturing process. The receiver has very low power consumption, runs off
two AAA batteries, and delivers the performance benefits of digital tuning to the
analog radio market.
Functional Block Diagram
Si4825
Si4830/34
ADC
AMI
AM
ANT
1
LNA_EN
Description
RFGND
LNA
DSP
DAC
AOUT
TUNE2
BAND
AMI
This product, its features, and/or its
architecture is covered by one or more of
the following patents, as well as other
patents, pending and issued, both
foreign and domestic: 7,127,217;
7,272,373;
7,272,375;
7,321,324;
7,355,476;
7,426,376;
7,471,940;
7,339,503; 7,339,504.
ADC
FM
ANT
FMI
AGC
0/90
TUNE1/2
ADC
CONTROL INTERFACE
BAND
VDD
XTAL
OSC
LNA_EN
REG
Rev. 1.0 5/13
RST
2.0~3.6V
AFC
VOL+/-
XTALI
Copyright © 2013 by Silicon Laboratories
Si4825
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si4825-A10
2
Rev. 1.0
Si4825-A10
TABLE O F C ONTENTS
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2. FM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.3. AM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.4. SW Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.5. Frequency Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.6. Band Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.7. Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.8. Reset, Powerup, and Powerdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5. Pin Descriptions: Si4825-A10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7. Package Outline: Si4825-A10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8. PCB Land Pattern: Si4825-A10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9. Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9.1. Si4825-A10 Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
9.2. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
10. Additional Reference Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Rev. 1.0
3
Si4825-A10
1. Electrical Specifications
Table 1. Recommended Operating Conditions1,2
Parameter
Symbol
Min
Typ
Max
Unit
VDD
2
—
3.6
V
VDDRISE
10
—
—
µs
TA
0
25
70
°C
Supply Voltage3
Power Supply Powerup Rise Time
Ambient Temperature Range
Test Condition
Note:
1. Typical values in the data sheet apply at VDD = 3.3 V and 25 °C unless otherwise stated.
2. All minimum and maximum specifications in the data sheet apply across the recommended operating conditions for
minimum VDD = 2.7 V.
3. Operation at minimum VDD is guaranteed by characterization when VDD voltage is ramped down to 2.0 V. Part
initialization may become unresponsive below 2.3 V.
Table 2. DC Characteristics
(VDD = 2.7 to 3.6 V, TA = 0 to 70 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
IFM
—
20.0
—
mA
IAM
—
19.0
—
mA
IDDPD
—
10
—
µA
FM Mode
Supply Current*
AM/SW Mode
Supply Current*
Supplies and Interface
VDD Powerdown Current
*Note: Specifications are guaranteed by characterization.
4
Rev. 1.0
Si4825-A10
Table 3. Reset Timing Characteristics
(VDD = 2.7 to 3.6 V, TA = 0 to 70 °C)
Parameter
Symbol
Min
Typ
Max
Unit
RSTB Pulse Width
tPRST
100
—
—
µs
VDD valid time before RSTB rises
tSRST
100
—
—
µs
RSTB low time before VDD becomes invalid
tRRST
0
—
—
µs
Notes:
1. RSTB must be held low for at least 100 µs after the voltage supply has been ramped up.
2. RSTB needs to be asserted (pulled low) prior to the supply voltage being ramped down.
tSRST
tPRST
tRRST
VDD
RSTB
Figure 1. Reset Timing
Rev. 1.0
5
Si4825-A10
Table 4. FM Receiver Characteristics1,2
(VDD = 2.7 to 3.6 V, TA = 0 to 70 °C)
Parameter
Min
Typ
Max
Unit
64
—
109
MHz
—
4.0
—
µV EMF
LNA Input Resistance4,5
—
4
—
k
LNA Input Capacitance4,5
—
5
—
pF
—
50
—
dB
—
105
—
dBµV EMF
Input Frequency
Symbol
fRF
Sensitivity with Headphone
Network
Test Condition
(S+N)/N = 26 dB
3
m = 0.3
AM Suppression4,5,6,7
Input IP34,8
Adjacent Channel Selectivity4
±200 kHz
—
45
—
dB
Alternate Channel Selectivity4
±400 kHz
—
60
—
dB
Audio Output Voltage5,6,7
—
72
—
mVRMS
Audio Mono S/N5,6,7,9,10
—
45
—
dB
Audio Frequency Response Low4
–3 dB
—
—
30
Hz
Audio Frequency Response High4
–3 dB
15
—
—
kHz
—
0.1
0.5
%
Audio THD6,5,11
Audio Output Load Resistance4,10
RL
Single-ended
10
—
—
k
Audio Output Load Capacitance4,10
CL
Single-ended
—
—
50
pF
Notes:
1. Additional testing information is available in “AN569: Si4831/35/36/20/24/25-DEMO Board Test Procedure.”
Volume = maximum for all tests. Tested at RF = 98.1 MHz.
2. To ensure proper operation and receiver performance, follow the guidelines in “AN738: Si4825/36-A Antenna,
Schematic, Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified
customers.
3. Frequency is 64~109 MHz.
4. Guaranteed by characterization.
5. VEMF = 1 mV.
6. FMOD = 1 kHz, MONO, and L = R unless noted otherwise.
7. f = 22.5 kHz.
8. |f2 – f1| > 2 MHz, f0 = 2 x f1 – f2.
9. BAF = 300 Hz to 15 kHz, A-weighted.
10. At AOUT pin.
11. f = 75 kHz.
6
Rev. 1.0
Si4825-A10
Table 5. AM/SW Receiver Characteristics1, 2
(VDD = 2.7 to 3.6 V, TA = 0 to 70 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
fRF
Medium Wave (AM)
504
—
1750
kHz
Short Wave (SW)
2.3
—
28.5
MHz
(S+N)/N = 26 dB
—
30
—
µV EMF
Large Signal Voltage Handling5
THD < 8%
—
300
—
mVRMS
Power Supply Rejection Ratio5
∆VDD = 100 mVRMS, 100 Hz
—
40
—
dB
Audio Output Voltage3,6
—
54
—
mVRMS
Audio S/N3,4,6
—
45
—
dB
Audio THD3,6
—
0.1
—
%
180
—
450
µH
Input Frequency
Sensitivity3,4,5
Antenna Inductance5,7
Notes:
1. Additional testing information is available in “AN569: Si4831/35/36/20/24/25-DEMO Board Test Procedure.”
Volume = maximum for all tests. Tested at RF = 6 MHz.
2. To ensure proper operation and receiver performance, follow the guidelines in “AN738: Si4825/36-A Antenna,
Schematic, Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified
customers.
3. FMOD = 1 kHz, 30% modulation, 2 kHz channel filter.
4. BAF = 300 Hz to 15 kHz, A-weighted.
5. Guaranteed by characterization.
6. VIN = 5 mVrms.
7. Stray capacitance on antenna and board must be < 10 pF to achieve full tuning range at higher inductance levels.
Table 6. Reference Clock and Crystal Characteristics
(VDD = 2.7 to 3.6 V, TA = 0 to 70 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
—
32.768
—
kHz
–100
—
100
ppm
Crystal Oscillator Frequency
—
32.768
—
kHz
Crystal Frequency Tolerance
–100
—
100
ppm
—
—
3.5
pF
Reference Clock
XTALI Supported Reference Clock
Frequencies
Reference Clock Frequency
Tolerance for XTALI
Crystal Oscillator
Board Capacitance
Rev. 1.0
7
Si4825-A10
Table 7. Thermal Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Thermal Resistance*
JA
—
80
—
°C/W
Ambient Temperature
TA
0
25
70
°C
Junction Temperature
TJ
—
—
77
°C
*Note: Thermal resistance assumes a multi-layer PCB with the exposed pad soldered to a topside PCB pad.
Table 8. Absolute Maximum Ratings1,2
Parameter
Symbol
Value
Unit
Supply Voltage
VDD
–0.5 to 5.8
V
Input Current3
IIN
10
mA
Operating Temperature
TOP
–40 to 95
C
Storage Temperature
TSTG
–55 to 150
C
0.4
VPK
RF Input Level
4
Notes:
1. Permanent device damage may occur if the above Absolute Maximum Ratings are exceeded. Functional operation
should be restricted to the conditions as specified in the operational sections of this data sheet. Exposure beyond
recommended operating conditions for extended periods may affect device reliability.
2. The Si4825 devices are high-performance RF integrated circuits with certain pins having an ESD rating of < 2 kV HBM.
Handling and assembly of these devices should only be done at ESD-protected workstations.
3. For input pins RST, VOL+, VOL–, XTALO, XTALI, BAND, TUNE2, TUNE1, LNA_EN.
4. At RF input pins, FMI and AMI.
8
Rev. 1.0
Si4825-A10
2. Typical Application Schematic
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Notes:
1. Place C4 close to VDD and GND pins.
2. Pin 15 GND connects directly to GND plane on PCB.
3. Pin 5 leave floating.
4. To ensure proper operation and receiver performance, follow the guidelines in "AN738: Si4825/36-A Antenna,
Schematic, Layout, and Design Guidelines." Silicon Labs will evaluate the schematics and layouts for qualified
customers.
5. Pin 6 connects to the FM antenna interface and pin 8 connects to the AM antenna interface.
6. Place Si4825 as close as possible to antenna jack and keep the FMI and AMI traces as short as possible.
7. Recommend keeping the AM ferrite loop antenna at least 5 cm away from the tuner chip.
8. Keep the AM ferrite loop antenna at least 5 cm away from MCU, audio AMP, and other circuits which have AM
interference.
9. Place the transformer T1 away from any sources of interference and even away from the I/O signals of the Si4825.
Rev. 1.0
9
Si4825-A10
3. Bill of Materials
Table 9. Si4825-A Bill of Materials
Component(s)
Value/Description
Supplier
C1
Reset capacitor 0.1 µF, ±20%, Z5U/X7R
Murata
C4
Supply bypass capacitor, 0.1 µF, ±20%, Z5U/X7R
Murata
C5
Coupling capacitor, 0.47 µF, ±20%, Z5U/X7R
Venkel
B1
Ferrite bead 2.5 k/100 MHz
Murata
Variable resistor (POT), 100 k, ±10%
Kennon
R1
Reset timing resistor, 100 k, ±5%
Venkel
R3
Resistor, 133 k, ±1%,
Venkel
R4
Resistor, 160 k, ±1%
Venkel
R5
Resistor, 67 k, ±1%
Venkel
R6
Resistor,140 k, ±1%
Venkel
U1
Si4825-A AM/FM/SW Analog Tune Analog Display Radio Tuner
Silicon
Laboratories
S1
Band switch
Any, depends
on customer
VR1
ANT1
Ferrite stick,180-450 μH
Jiaxin
Optional Components
C2, C3
Y1
ANT2
10
Crystal load capacitors, 22 pF, ±5%, COG
(Optional: for crystal oscillator option)
32.768 kHz crystal (Optional: for crystal oscillator option)
Air loop antenna, 10–20 μH
Venkel
Epson or equivalent
Various
Rev. 1.0
Si4825-A10
4. Functional Description
Si4825
Si4830/34
ADC
AMI
AM
ANT
RFGND
LNA
DSP
DAC
AOUT
ADC
FM
ANT
FMI
AGC
0/90
TUNE1/2
ADC
BAND
VDD
XTAL
OSC
LNA_EN
REG
RST
2.0~3.6V
CONTROL INTERFACE
VOL+/-
XTALI
AFC
Figure 2. Si4825 Functional Block Diagram
4.1. Overview
4.2. FM Receiver
The Si4825 is the entry level mechanical-tuned digital
CMOS AM/FM/SW radio receiver IC that integrates the
complete receiver function from antenna input to audio
output. The Si4825 extends Silicon Laboratories multiband tuner family, and further increases the ease and
attractiveness of design radio reception to audio
devices through small size and board area, minimum
component count, and superior, proven performance.
The Si4825 requires a simple application circuit, and
removes any requirements for manually tuning
components during the manufacturing process.
The Si4825 integrates a low noise amplifier (LNA)
supporting the worldwide FM broadcast band (64 to
109 MHz) and the TV audio stations within the
frequency range in China area are also supported.
Leveraging Silicon Laboratories' proven and patented
digital low intermediate frequency (low-IF) receiver
architecture, the Si4825 delivers desired RF
performance and interference rejection in AM, FM, and
SW bands. The high integration and complete system
production test simplifies design-in, increases system
quality, and improves manufacturability.
Pre-emphasis and de-emphasis is a technique used by
FM broadcasters to improve the signal-to-noise ratio of
FM receivers by reducing the effects of high frequency
interference and noise. When the FM signal is
transmitted, a pre-emphasis filter is applied to
accentuate the high audio frequencies. All FM receivers
incorporate a de-emphasis filter which attenuates high
frequencies to restore a flat frequency response. Two
time constants are used in various regions. The deemphasis time constant can be chosen to be 50 or
75 µs.
Rev. 1.0
11
Si4825-A10
4.3. AM Receiver
4.5. Frequency Tuning
The highly integrated Si4825-A10 supports worldwide
AM band reception from 504 to 1750 kHz with five subbands using a digital low-IF architecture with a minimum
number of external components and no manual
alignment required. This patented architecture allows
for high-precision filtering, offering excellent selectivity
and SNR with minimum variation across the AM band.
The Si4825 supports the worldwide AM band with five
sub-bands. One of the bands is a universal AM band
(AM4, 520–1730 kHz) supporting both 9 kHz and
10 kHz channel spaces for all regional AM standards of
the world. Similar to the FM receiver, the Si4825-A10
optimizes sensitivity and rejection of strong interferers,
allowing better reception of weak stations.
A valid channel can be found by tuning the
potentiometer that is connected to the TUNE1 and
TUNE2 pin of the Si4825-A10 chip.
To offer maximum flexibility, the receiver supports a
wide range of ferrite loop sticks from 180–450 µH. An
air loop antenna is supported by using a transformer to
increase the effective inductance from the air loop.
Using a 1:5 turn ratio inductor, the inductance is
increased by 25 times and easily supports all typical AM
air loop antennas, which generally vary between 10 and
20 µH.
4.4. SW Receiver
The Si4825 supports 36 short wave (SW) band
receptions from 2.3 to 28.5 MHz, 18 of which are meter
wave band (Narrow), and the rest of the SW bands are
with wider frequency range that can be used in SW
radio with 1 or 2 SW bands. Si4825 supports extensive
short wave features such as minimal discrete
components and no factory adjustments. The Si4825
supports using the FM antenna to capture short wave
signals.
4.6. Band Select
The Si4825-A10 supports worldwide AM band with five
sub-bands, US/Europe/Japan/China FM band with five
sub-bands, and SW band with 36 sub-bands. For details
on band selection, refer to “AN738: Si4825/36-A
Antenna, Schematic, Layout, and Design Guidelines."
4.7. Volume Control
The Si4825 not only allows customers to use the
traditional PVR wheel volume control through an
external speaker amplifier, it also supports direct digital
volume control through pins 10 and pin 11 by using
volume up and down buttons. Refer to "AN738:
Si4825/36-A Antenna, Schematic, Layout, and Design
Guidelines."
4.8. Reset, Powerup, and Powerdown
Setting the RSTB pin low will disable analog and digital
circuitry, reset the registers to their default settings, and
disable the bus. Setting the RSTB pin high will bring the
device out of reset.
Figure 1 shows typical reset, startup, and shutdown
timings for the Si4825. RSTB must be held low
(asserted) during any power supply transitions and kept
asserted as specified in Figure 1 after the power
supplies are ramped up and stable. Failure to assert
RSTB as indicated here may cause the device to
malfunction and may result in permanent device
damage.
A powerdown mode is available to reduce power
consumption when the part is idle. Putting the device in
powerdown mode will disable analog and digital circuitry
while keeping the bus active.
12
Rev. 1.0
Si4825-A10
5. Pin Descriptions: Si4825-A10
1
16
AOUT
2
15
GND
3
14
VDD
4
13
XTALI
NC
5
12
XTALO
FMI
6
11
VOL-
RFGND
7
10
VOL+
8
9
RST
LNA_EN
TUNE1
TUNE2
BAND
AMI
Pin Number(s)
Name
1
LNA_EN
Description
2
TUNE1
Frequency tuning
3
TUNE2
Frequency tuning
4
BAND
Band selection and de-emphasis selection
5
NC
No connect. Leave floating.
6
FMI
FM RF inputs. FMI should be connected to the antenna trace.
7
RFGND
8
AMI
AM RF input. AMI should be connected to the AM antenna.
9
RST
Device reset (active low) input
10
VOL+
Volume button up
11
VOL–
Volume button down
12
XTALO
Crystal oscillator output
13
XTALI
Crystal oscillator input/external reference clock input
14
VDD
Supply voltage. May be connected directly to battery.
15
GND
Ground. Connect to ground plane on PCB.
16
AOUT
Audio output
Enable SW external LNA.
RF ground. Connect to ground plane on PCB.
Rev. 1.0
13
Si4825-A10
6. Ordering Guide
Part Number1,2
Description
Package
Type
Operating
Temperature/Voltage
Si4825-A10-CS
AM/FM/SW Broadcast Radio Receiver
16L SOIC
Pb-free
0 to 70 °C
2.0 to 3.6 V
Notes:
1. Add an “(R)” at the end of the device part number to denote tape and reel option. The devices will typically operate at
25 °C with degraded specifications for VDD voltage ramped down to 2.0 V.
2. The -C suffix in the part number indicates Consumer Grade product. Please visit www.silabs.com to get more
information on product grade specifications.
14
Rev. 1.0
Si4825-A10
7. Package Outline: Si4825-A10
The 16-pin SOIC illustrates the package details for the Si4825-A10. Table 10 lists the values for the dimensions
shown in the illustration.
Figure 3. 16-Pin SOIC
Rev. 1.0
15
Si4825-A10
Table 10. Package Dimensions
Dimension
A
A1
A2
b
c
D
E
E1
e
L
L2
h
θ
aaa
bbb
ccc
ddd
Min
—
0.10
1.25
0.31
0.17
Max
1.75
0.25
—
0.51
0.25
9.90 BSC
6.00 BSC
3.90 BSC
1.27 BSC
0.40
1.27
0.25 BSC
0.25
0°
0.50
8°
0.10
0.20
0.10
0.25
Notes:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to the JEDEC Solid State Outline MS-012, Variation AC.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification for
Small Body Components.
16
Rev. 1.0
Si4825-A10
8. PCB Land Pattern: Si4825-A10
Figure 4, “PCB Land Pattern,” illustrates the PCB land pattern details for the Si4825-A10-CS SOIC. Table 11 lists
the values for the dimensions shown in the illustration.
Figure 4. PCB Land Pattern
Table 11. PCB Land Pattern Dimensions
Dimension
Feature
(mm)
C1
Pad Column Spacing
5.40
E
Pad Row Pitch
1.27
X1
Pad Width
0.60
Y1
Pad Length
1.55
Notes:
1. This Land Pattern Design is based on IPC-7351 pattern SOIC127P600X165-16N
for Density Level B (Median Land Protrusion).
2. All feature sizes shown are at Maximum Material Condition (MMC) and a card
fabrication tolerance of 0.05 mm is assumed.
Rev. 1.0
17
Si4825-A10
9. Top Marking
9.1. Si4825-A10 Top Marking
9.2. Top Marking Explanation
Mark Method:
Laser
Pin 1 Mark:
Mold Dimple (Bottom-Left Corner)
Font Size:
0.71 mm (2.0 Point) Right-Justified
Line 1 Mark Format: Custom Part Number
Si4825A10
Circle = 1.3 mm Diameter
“e3” Pb-Free Symbol
YY = Year
Line 2 Mark Format: WW = Work week
Assigned by the Assembly House. Corresponds to the
year and work week of the mold date.
TTTTTT = Manufacturing code
18
Manufacturing Code from the Assembly Purchase
Order form.
Rev. 1.0
Si4825-A10
10. Additional Reference Resources
Contact your local sales representatives for more information or to obtain copies of the following references:



AN738: Si4825/36-A Antenna, Schematic, Layout, and Design Guidelines
AN569: Si4831/35/36/20/24/25-DEMO Board Test Procedure
Si4825-DEMO Board User’s Guide
Rev. 1.0
19
Si4825-A10
DOCUMENT CHANGE LIST
Revision 0.1 to Revision 0.8







Updated Table 1, “Recommended Operating
Conditions”
Updated Table 2, "DC Characteristics"
Updated Table 4, "FM Receiver Characteristics"
Updated Table 5, "AM/SW Receiver Characteristics"
Updated Section "4.3. AM Receiver"
Updated Section "10. Additional Reference
Resources"
Section 5 "Pin Descriptions: Si4825-A10"
Revision 0.8 to Revision 1.0


20
Updated Table 3. "Reset Timing Characteristics"
Inserted Section 4.8. "Reset, Powerup, and
Powerdown"
Rev. 1.0
Smart.
Connected.
Energy-Friendly
Products
Quality
Support and Community
www.silabs.com/products
www.silabs.com/quality
community.silabs.com
Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
or express copyright licenses granted hereunder to design or fabricate any integrated circuits. The products must not be used within any Life Support System without the specific
written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected
to result in significant personal injury or death. Silicon Laboratories products are generally not intended for military applications. Silicon Laboratories products shall under no
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thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®,
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