Si4831/35-B30 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 (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 Table and portable radios Stereos Mini/micro systems CD/DVD players Boom boxes Pin Assignments Modules Clock radios Mini HiFi Entertainment systems Si4831/35-B30 (SSOP) 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 Silicon Labs, 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 FMI LOUT DAC ROUT DSP ADC FM/SW ANT DAC 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 0/90 TUNE 1/2 ADC AFC Rev. 1.0 1/11 BAND RST XTAL OSC VOL/TONE REG STEREO 2.0~3.6V VDD1/2 CONTROL INTERFACE STATION XTALI Copyright © 2011 by Silicon Laboratories Si4831/35-B30 Si4831/35-B30 2 Rev. 1.0 Si4831/35-B30 TABLE O F C ONTENTS Section 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 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Rev. 1.0 3 Si4831/35-B30 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 VDD –0.5 to 5.8 V IIN 10 mA Operating Temperature TOP –40 to 95 C Storage Temperature TSTG –55 to 150 C 0.4 VPK Supply Voltage 3 Input Current 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 Rev. 1.0 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 Rev. 1.0 5 Si4831/35-B30 Table 5. FM Receiver Characteristics1,2 (VDD = 2.7 to 3.6 V, TA = –15 to 85 °C) Parameter Test Condition Unit Min 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 Symbol fRF Sensitivity with Headphone (S+N)/N = 26 dB Network3 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.” Silicon Laboratories 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 Rev. 1.0 Si4831/35-B30 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 ∆VDD = 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.” 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 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 Rev. 1.0 7 Si4831/35-B30 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." Silicon Labs 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 Rev. 1.0 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 Silicon Laboratories 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 Rev. 1.0 9 Si4831/35-B30 4. Functional Description Si4831/35 Si4830/34 ADC AMI AM ANT RFGND LNA FMI LOUT DAC ROUT DSP ADC FM/SW ANT DAC AGC 0/90 TUNE 1/2 ADC AFC BAND 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. The Si4831/35-B30 integrates a low noise amplifier (LNA) supporting the worldwide FM broadcast band (64 to 109 MHz). Leveraging Silicon Laboratories' 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. 10 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. Rev. 1.0 Si4831/35-B30 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. Rev. 1.0 11 Si4831/35-B30 5. Pin Descriptions: Si4831/35-B30 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 Stereo indicator 2 STATION Station indicator 3 TUNE1 Frequency tuning 4 TUNE2 Frequency tuning 5 BAND Band selection and De-emphasis/Stereo separation selection Description 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 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. RST Device reset (active low) input 15 16 12 STEREO RF ground. Connect to ground plane on PCB. VOL+/TREBLE Volume button up/Treble 17 VOL–/BASS Volume button down/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 Rev. 1.0 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. Rev. 1.0 13 Si4831/35-B30 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 Line 2 Marking: YY = Year WW = Work week Assigned by the Assembly House. TTTTTT = Manufacturing code 14 4831B30GU = Si4831-B30 4835B30GU = Si4835-B30 Rev. 1.0 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 A A1 b c D E E1 e L θ aaa bbb ccc ddd Min — 0.10 0.20 0.10 Nom — — — — 8.65 BSC 6.00 BSC 3.90 BSC 0.635 BSC — — 0.20 0.18 0.10 0.10 0.40 0° Max 1.75 0.25 0.30 0.25 1.27 8° 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. Rev. 1.0 15 Si4831/35-B30 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 C 5.20 E Max 5.40 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 Rev. 1.0 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 Rev. 1.0 17 Si4831/35-B30 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 Rev. 1.0 Si4831/35-B30 NOTES: Rev. 1.0 19 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 circumstances be used in weapons of mass destruction including (but not limited to) nuclear, biological or chemical weapons, or missiles capable of delivering such weapons. Trademark Information Silicon Laboratories Inc., Silicon Laboratories, Silicon Labs, SiLabs and the Silicon Labs logo, CMEMS®, EFM, EFM32, EFR, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZMac®, EZRadio®, EZRadioPRO®, DSPLL®, ISOmodem ®, Precision32®, ProSLIC®, SiPHY®, USBXpress® and others are trademarks or registered trademarks of Silicon Laboratories Inc. ARM, CORTEX, Cortex-M3 and THUMB are trademarks or registered trademarks of ARM Holdings. Keil is a registered trademark of ARM Limited. All other products or brand names mentioned herein are trademarks of their respective holders. Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 USA http://www.silabs.com