Si 4831/ 35- B30
B ROADCAST M ECHANICAL T U N I N G A M/ FM/SW R A D I O R E C E I V E R
Features
Worldwide FM band support
(64–109 MHz)
Worldwide AM band support
(504–1750 kHz)
SW band support (Si4835 only)
(5.6–22 MHz)
Excellent real-world performance
EN55020-compliant
No manual alignment necessary
Flexible band selections
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
24-pin SSOP
RoHS-compliant
Supports station and stereo LED
indicators
Direct volume control
Bass and treble tone control
Ordering Information:
See page 13.
Applications
Pin Assignments
Table and portable radios
Stereos
Mini/micro systems
CD/DVD players
Boom boxes
Modules
Clock radios
Mini HiFi
Entertainment systems
Description
The Si4831/35-B30 is the 2nd generation mechanical-tuned digital CMOS
AM/FM/SW radio receiver IC that integrates the complete receiver function from
antenna input to audio output. Like other successful audio products from
Skyworks, Si4831/35-B30 offers unmatched integration and PCB space savings
with minimum external components and a small board area. The Si4831/35-B30
requires a simple application circuit and removes any requirements for manually
tuning components during the manufacturing process. The Si4831/35-B30 is a
very simple product to design, manufacture, and support across multiple product
lines. 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
Si4831/35
Si4830/34
AM
ANT
ADC
AMI
RFGND
LNA
ADC
FM/SW
ANT
DAC
LOUT
DAC
ROUT
DSP
Si4831/35-B30 (SSOP)
STEREO
1
24
LOUT
STATION
2
23
ROUT
TUNE1
3
22
DBYP
TUNE2
4
21
VDD2
BAND
5
20
VDD1
NC
6
19
XTALI
NC
7
18
XTALO
FMI
8
17
VOL-/BASS
RFGND
9
16
VOL+/TREBLE
NC
10
15
RST
NC
11
14
GND
AMI
12
13
GND
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.
AGC
FMI
0/90
TUNE 1/2
ADC
BAND
AFC
RST
XTAL
OSC
VOL/TONE
REG
STEREO
2.0~3.6V VDD1/2
CONTROL
INTERFACE
STATION
XTALI
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Si 4831/ 35-B 30
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Si4831/35-B30
TA B L E
Section
OF
C ONTENTS
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.2. FM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.3. AM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4. SW Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.5. Frequency Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.6. Band Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.7. Bass and Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
4.8. Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5. Pin Descriptions: Si4831/35-B30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7. Package Markings (Top Marks) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.1. Si4831/35-B30 Top Mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2. Top Mark Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
8. Package Outline: Si4831/35-B30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
9. PCB Land Pattern: Si4831/35-B30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
10. Additional Reference Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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Si 4831/ 35-B 30
1. Electrical Specifications
Table 1. Recommended Operating Conditions1,2
Parameter
Supply Voltage3
Power Supply Powerup Rise Time
Ambient Temperature
Symbol
Test Condition
Min
Typ
Max
Unit
VDD
2
—
3.6
V
VDDRISE
10
—
—
µs
TA
–15
25
85
C
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. 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 Level4
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 Si4831/35-B30 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+/TREBLE, VOL–/BASS, XTALO, XTALI, BAND, TUNE2, TUNE1, STATION, and STEREO.
4. At RF input pins, FMI and AMI.
4
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Si4831/35-B30
Table 3. DC Characteristics
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
—
21.0
—
mA
—
21.5
—
mA
IAM
—
17.0
—
mA
IDDPD
—
10
—
µA
FM Mode
Supply Current1
IFM
Supply Current2
IFM
Low SNR level
AM/SW Mode
Supply Current1
Supplies and Interface
VDD Powerdown Current
Notes:
1. Specifications are guaranteed by characterization.
2. LNA is automatically switched to higher current mode for optimum sensitivity in weak signal conditions.
Table 4. Reset Timing Characteristics
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Symbol
Min
Typ
Max
Unit
RST Pulse Width and TUNE1, TUNE2 Setup to RST
tSRST
100
—
—
µs
TUNE1, TUNE2 Hold from RST
tHRST
30
—
—
ns
tSRST
RST
TUNE1
TUNE2
tHRST
70%
30%
70%
30%
70%
30%
Figure 1. Reset Timing
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Table 5. FM Receiver Characteristics1,2
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Typ
Max
64
—
109
MHz
—
2.2
—
µV EMF
LNA Input Resistance4,5
—
4
—
k
LNA Input Capacitance4,5
—
5
—
pF
—
50
—
dB
—
105
—
dBµV EMF
Input Frequency
Test Condition
Unit
Min
Symbol
fRF
Sensitivity with Headphone Network3
(S+N)/N = 26 dB
m = 0.3
AM Suppression4,5,6,7
Input IP34,8
Adjacent Channel Selectivity4
±200 kHz
—
50
—
dB
Alternate Channel Selectivity4
±400 kHz
—
65
—
dB
Audio Output Voltage5,6,7
—
80
—
mVRMS
Audio Mono S/N5,6,7,9,10
—
55
—
dB
Audio Stereo S/N3,4,5,7,9,10,
—
55
—
dB
Audio Frequency Response Low
–3 dB
—
—
30
Hz
Audio Frequency Response High
–3 dB
15
—
—
kHz
Audio Stereo Separation5,11
—
42
—
dB
Audio THD6,5,11
—
0.1
0.5
%
Audio Output Load Resistance4,10
RL
Single-ended
10
—
—
k
Audio Output Load Capacitance4,10
CL
Single-ended
—
—
50
pF
—
—
110
ms
Powerup/Band Switch Time4
Notes:
1. Additional testing information is available in “AN569: Si4831/35-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 “AN555: Si483x-B Antenna, Schematic,
Layout, and Design Guidelines.” Skyworks will evaluate schematics and layouts for qualified customers.
3. Frequency is 76~109 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 LOUT and ROUT pins.
11. f = 75 kHz.
6
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Table 6. AM/SW Receiver Characteristics1, 2
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
fRF
Medium Wave (AM)
504
—
1750
kHz
Short Wave (SW)
5.60
—
22.0
MHz
(S+N)/N = 26 dB
—
30
—
µV EMF
Large Signal Voltage Handling5
THD < 8%
—
300
—
mVRMS
Power Supply Rejection Ratio5
ΔVDD = 100 mVRMS, 100 Hz
—
40
—
dB
Audio Output Voltage3,6
—
60
—
mVRMS
Audio S/N3,4,6
—
55
—
dB
Audio THD3,6
—
0.1
0.5
%
180
—
450
µH
—
—
110
ms
Input Frequency
Sensitivity3,4,5
Antenna Inductance5,7
From powerdown
Powerup/Band Switch Time5
Notes:
1. Additional testing information is available in “AN569: Si4831/35-DEMO Board Test Procedure.” Volume = maximum
for all tests. Tested at RF = 520 kHz.
2. To ensure proper operation and receiver performance, follow the guidelines in “AN555: Si483x-B Antenna, Schematic,
Layout, and Design Guidelines.” Skyworks 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 7. Reference Clock and Crystal Characteristics
(VDD = 2.7 to 3.6 V, TA = –15 to 85 °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
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Si 4831/ 35-B 30
2. Typical Application Schematic
TUNE1
TUNE1
2.5k/100M
B1
FMI
(Si4835 only)
R3
253k
S2
VR1
100k
BAND
1
2
AM
ANT1
AM antenna
3
BAND
10k
STATION_LED
1
FM
STEREO
3
2
STATION
TUNE2
TUNE1
4
5
STEREO_LED
BAND
6
NC
7
NC
8
FMI
9
RFGND
10
NC
AMI
12
0.47u
11
AMI
NC
C5
R4
180k
VDD
R2
R5
67k
LOUT
24
ROUT
VDD2
DBYP
23
22
21
XTALI
XTAL0
VDD1
20
19
VOL-/BASS
U1
18
17
RST
GND
15
GND
13
RFGND
T1
14
ANT2
16
AMI
0.47u
VOL+/TREBLE
C5
LOUT
C4
Optional: AM air loop antenna
ROUT
VDD
0.1u
VDD
R1
VDD
100k
C1
0.1u
2.0 TO 3.6V
2.0 TO 3.6V
Y1
32.768KHz
C3
22p
C2
22p
Optional
Notes:
1. Place C4 close to VDD2 and DBYP pins.
2. All grounds connect directly to GND plane on PCB.
3. Pin 6 and 7 leave floating.
4. To ensure proper operation and receiver performance, follow the guidelines in "AN555: Si483x-B Antenna, Schematic,
Layout, and Design Guidelines." Skyworks will evaluate the schematics and layouts for qualified customers.
5. Pin 8 connects to the FM antenna interface and pin 12 connects to the AM antenna interface.
6. Place Si483x as close as possible to antenna jack and keep the FMI and AMI traces as short as possible.
8
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Si4831/35-B30
3. Bill of Materials
Table 8. Si4831/35-B30 Bill of Materials
Component(s)
Value/Description
Supplier
C1
Reset capacitor 0.1 uF, ±20%, Z5U/X7R
Murata
C4
Supply bypass capacitor, 0.1 uF, ±20%, Z5U/X7R
Murata
C5
Coupling capacitor, 0.47 µF, ±20%, Z5U/X7R
Murata
B1
Ferrite bead 2.5k/100 MHz
Murata
Variable resistor (POT), 100k, ±10%
Kennon
R1
Reset timing resistor, 100k, ±5%
Venkel
R2
Resistor, 10k, ±5%
Venkel
R3
Resistor, 253k, ±1%
Venkel
R4
Resistor, 180k, ±1%
Venkel
R5
Resistor, 67k, ±1%
Venkel
U1
Si4831/35-B30 Mechanical Tuning Radio Receiver
S2
Band switch
VR1
ANT1
Skyworks
Any, depends on
customer
Ferrite stick,180-450 µH
Jiaxin
Optional Components
C2, C3
Y1
ANT2
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
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Si 4831/ 35-B 30
4. Functional Description
Si4831/35
Si4830/34
ADC
AMI
AM
ANT
RFGND
LNA
LOUT
DAC
ROUT
DSP
ADC
FM/SW
ANT
DAC
AGC
FMI
0/90
TUNE 1/2
ADC
BAND
AFC
RST
XTAL
OSC
VOL/TONE
REG
STEREO
2.0~3.6V VDD1/2
CONTROL
INTERFACE
STATION
XTALI
Figure 2. Si4831/35-B30 Functional Block Diagram
4.1. Overview
4.2. FM Receiver
The Si4831/35-B30 is the industry's most advanced
fully integrated, mechanical-tuned 100% CMOS
AM/FM/SW radio receiver IC. Offering unmatched
integration and PCB space savings, the Si4831/35-B30
requires minimum external components and a small
board area. The Si4831/35-B30 AM/FM/SW radio
provides space savings and low power consumption
while delivering the high performance and design
simplicity desired for all AM/FM/SW solutions.
Leveraging Skyworks' proven and patented digital low
intermediate frequency (low-IF) receiver architecture,
the Si4831/35-B30 delivers superior 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.
The Si4831/35-B30 integrates a low noise amplifier
(LNA) supporting the worldwide FM broadcast band (64
to 109 MHz).
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. Refer to "AN555: Si483x-B Antenna, Schematic,
Layout, and Design Guidelines."
The Si4831/35-B30 also has advanced stereo blending
that employs adaptive noise suppression. As a signal
quality degrades, the Si4831/35-B30 gradually
combines the stereo left and right audio channels to a
mono audio signal to maintain optimum sound fidelity
under varying reception conditions. The Si4831/35-B30
can drive a stereo light with the stereo/mono information
so that the user can easily discern the signal quality.
10
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The stereo light up criteria is defined using both RSSI
and the Left and Right separation levels as these two
specifications are the primary factors for stereo
listening. The criteria can be set between two
conditions: the Left and Right channels are separated
by more than 6 dB with RSSI at >20 dB or Left and
Right channels are separated by more than 12 dB with
RSSI at >28 dB. The selection can be set up using
different values of the external resister. Refer to
"AN555: Si483x-B Antenna, Schematic, Layout, and
Design Guidelines."
4.3. AM Receiver
The highly integrated Si4831/35-B30 supports
worldwide AM band reception from 504 to 1750 kHz
with five sub-bands 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. Similar to the FM receiver, the Si4831/35-B30
optimizes sensitivity and rejection of strong interferers,
allowing better reception of weak stations.
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
4.5. Frequency Tuning
A valid channel can be found by tuning the
potentiometer that is connected to the TUNE1 and
TUNE2 pin of the Si4831/35-B30 chip.
To offer easy tuning, the Si4831/35-B30 also supports a
station LED light. It will light up the LED if the RF signal
quality passes the LED sensitivity threshold when tuned
to a valid station.
4.6. Band Select
The Si4831/35-B30 supports worldwide AM band with
five sub-bands, US/Europe/Japan/China FM band with
five sub-bands, and SW band with 16 sub-bands. For
details on band selection, refer to "AN555: Si483x-B
Antenna, Schematic, Layout, and Design Guidelines."
4.7. Bass and Treble
The Si4831/35-B30 further supports bass and treble
tone control for superior sound quality. Pins 16 and 17
can be configured for tone control, allowing customers
to use either two buttons or one slide-switch to adjust
the bass and treble. For further configuration details,
refer to "AN555: Si483x-B Antenna, Schematic, Layout,
and Design Guidelines."
4.8. Volume Control
The Si4831/35-B30 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 16 and pin 17 by using
volume up and down buttons. Refer to "AN555: Si483xB Antenna, Schematic, Layout, and Design Guidelines."
The Si4835 supports 16 short wave (SW) band
receptions from 5.60 to 22.0 MHz. Si4835 supports
extensive short wave features such as minimal discrete
components and no factory adjustments. The Si4835
supports using the FM antenna to capture short wave
signals.
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5. Pin Descriptions: Si4831/35-B30
STEREO
1
24
LOUT
STATION
2
23
ROUT
TUNE1
3
22
DBYP
TUNE2
4
21
VDD2
BAND
5
20
VDD1
NC
6
19
XTALI
NC
7
18
XTALO
FMI
8
17
VOL-/BASS
RFGND
9
16
VOL+/TREBLE
NC
10
15
RST
NC
11
14
GND
AMI
12
13
GND
Pin Number(s)
Name
1
STEREO
Description
Stereo indicator
2
STATION
Station indicator
3
TUNE1
Frequency tuning
4
TUNE2
Frequency tuning
5
BAND
Band selection and De-emphasis/Stereo separation selection
6,7
NC
No connect. Leave floating.
8
FMI
FM RF inputs. FMI should be connected to the antenna trace.
9
RFGND
10,11
NC
RF ground. Connect to ground plane on PCB.
Unused. Tie these pins to GND.
12
AMI
AM RF input. AMI should be connected to the AM antenna.
13,14
GND
Ground. Connect to ground plane on PCB.
15
RST
Device reset (active low) input
16
VOL+/TREBLE
17
VOL–/BASS
18
XTALO
Crystal oscillator output
19
XTALI
Crystal oscillator input
20
VDD1
Supply voltage. May be connected directly to battery.
21
VDD2
Supply voltage. May be connected directly to battery.
22
DBYP
Dedicated bypass for VDD
23
ROUT
Right audio line output in analog output mode
24
LOUT
Left audio line output in analog output mode
Volume button up/Treble
Volume button down/Bass
12
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Si4831/35-B30
6. Ordering Guide
Part Number*
Description
Package
Type
Operating
Temperature/Voltage
Si4831-B30-GU
AM/FM Broadcast Radio Receiver
24L SSOP
Pb-free
–15 to 85 °C
2.0 to 3.6 V
Si4835-B30-GU
AM/FM/SW Broadcast Radio Receiver
24L SSOP
Pb-free
–15 to 85 °C
2.0 to 3.6 V
*Note: 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.
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Si 4831/ 35-B 30
7. Package Markings (Top Marks)
7.1. Si4831/35-B30 Top Mark
4831B30GU
YYWWTTTTTT
4835B30GU
YYWWTTTTTT
7.2. Top Mark Explanation
Mark Method:
YAG Laser
Line 1 Marking:
Device identifier
4831B30GU = Si4831-B30
4835B30GU = Si4835-B30
Line 2 Marking:
YY = Year
WW = Work week
TTTTTT = Manufacturing code
Assigned by the Assembly House.
14
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Si4831/35-B30
8. Package Outline: Si4831/35-B30
The 24-pin SSOP illustrates the package details for the Si4831/35-B30. Table 9 lists the values for the dimensions
shown in the illustration.
Figure 3. 24-Pin SSOP
Table 9. Package Dimensions
Dimension
Min
Nom
Max
A
—
—
1.75
A1
0.10
—
0.25
b
0.20
—
0.30
c
0.10
—
0.25
D
8.65 BSC
E
6.00 BSC
E1
3.90 BSC
e
0.635 BSC
L
0.40
—
1.27
θ
0°
—
8°
aaa
0.20
bbb
0.18
ccc
0.10
ddd
0.10
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 MO-137, Variation AE.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020 specification
for Small Body Components.
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Si 4831/ 35-B 30
9. PCB Land Pattern: Si4831/35-B30
Figure 4, “PCB Land Pattern,” illustrates the PCB land pattern details for the Si4831/35-B30-GU SSOP. Table 10
lists the values for the dimensions shown in the illustration.
Figure 4. PCB Land Pattern
Table 10. PCB Land Pattern Dimensions
Dimension
Min
Max
C
5.20
5.40
E
0.65 BSC
X1
0.35
0.45
Y1
1.55
1.75
General:
1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. This land pattern design is based on the IPC-7351 guidelines.
Solder Mask Design:
3. All metal pads are to be non-solder mask defined (NSMD). Clearance between the
solder mask and the metal pad is to be 60 µm minimum, all the way around the pad.
Stencil Design:
4. A stainless steel, laser-cut, and electro-polished stencil with trapezoidal walls
should be used to assure good solder paste release.
5. The stencil thickness should be 0.125 mm (5 mils).
6. The ratio of stencil aperture to land pad size should be 1:1 for all perimeter pads.
Card Assembly:
7. A No-Clean, Type-3 solder paste is recommended.
8. The recommended card reflow profile is per the JEDEC/IPC J-STD-020
specification for Small Body Components.
16
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
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Si4831/35-B30
10. Additional Reference Resources
Contact your local sales representatives for more information or to obtain copies of the following references:
EN55020 Compliance Test Certificate
AN555: Si483x-B Antenna, Schematic, Layout, and Design Guidelines
AN569: Si4831/35-DEMO Board Test Procedure
Si4831/35-DEMO Board User’s Guide
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Si 4831/ 35-B 30
DOCUMENT CHANGE LIST
Revision 0.1 to Revision 0.7
Updated block diagram.
Updated application schematic.
Updated bill of materials.
Updated Section “4.2. FM Receiver”.
Updated Section “4.3. AM Receiver”.
Updated Section “4.6. Band Select”.
Revision 0.7 to Revision 1.0
Updated block diagram
Updated Table 2, “Absolute Maximum Ratings1,2,”
on page 4
Updated Table 5, “FM Receiver Characteristics1,2,”
on page 6
Updated Table 6, “AM/SW Receiver Characteristics1,
2
,” on page 7
Updated “4. Functional Description”
Updated “10. Additional Reference Resources”
18
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NOTES:
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