SI4735-C40-GU Silicon Laboratories Inc, SI4735-C40-GU Datasheet

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... Programmable reference clock  Volume control  Adjustable soft mute control  RDS/RBDS processor (Si4735)  Optional digital audio out (Si4735)  2-wire and 3-wire control interface  Integrated LDO regulator  2.0 to 5.5 V supply voltage (SSOP)  2.7 to 5.5 V supply voltage (QFN)  ...

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Si4734/35-C40 2 Rev. 1.0 ...

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... LW Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 5.7. Digital Audio Interface (Si4735 Only 5.8. Stereo Audio Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.9. De-emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.10. Stereo DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.11. Soft Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.12. RDS/RBDS Processor (Si4735 Only .24 5.13. Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.14. Seek . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.15. Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.16. Control Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.17. GPO Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.18. Firmware Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 5 ...

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Si4734/35-C40 1. Electrical Specifications Table 1. Recommended Operating Conditions Parameter 2 Supply Voltage Interface Supply Voltage Power Supply Powerup Rise Time Interface Power Supply Powerup Rise Time Ambient Temperature Note: 1. All minimum and maximum specifications apply across the recommended ...

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Table 3. DC Characteristics (V = 2 1. Parameter FM Mode 1 Supply Current 2 Supply Current 1 RDS Supply Current AM/SW/LW Mode 1 Supply Current Supplies and Interface ...

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Si4734/35-C40 Table 4. Reset Timing Characteristics (V = 2 1. Parameter RST Pulse Width and GPO1, GPO2/INT Setup to RST GPO1, GPO2/INT Hold from RST Important Notes: 1. When ...

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Table 5. 2-Wire Control Interface Characteristics (V = 2 1. Parameter SCLK Frequency SCLK Low Time SCLK High Time  SCLK Input to SDIO Setup (START)  SCLK Input ...

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Si4734/35-C40 SU:STA HD:STA LOW 70% SCLK 30% 70% SDIO 30% START t r:IN Figure 2. 2-Wire Control Interface Read and Write Timing Parameters SCLK A6-A0, SDIO R/W START ADDRESS + R/W Figure 3. 2-Wire Control Interface Read ...

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Table 6. 3-Wire Control Interface Characteristics (V = 2 1. Parameter SCLK Frequency SCLK High Time SCLK Low Time SDIO Input, SEN to SCLKSetup SDIO Input to SCLKHold  ...

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Si4734/35-C40 Table 7. SPI Control Interface Characteristics (V = 2 1. Parameter SCLK Frequency SCLK High Time SCLK Low Time SDIO Input, SEN to SCLKSetup SDIO Input to SCLKHold ...

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Table 8. Digital Audio Interface Characteristics (V = 2 1. Parameter DCLK Cycle Time DCLK Pulse Width High DCLK Pulse Width Low DFS Set-up Time to DCLK Rising Edge ...

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Si4734/35-C40 Table 9. FM Receiver Characteristics (V = 2 1. Parameter Input Frequency Sensitivity with Headphone 3,4,5 Network Sensitivity with 50  Network 3,4,5,6 6 RDS Sensitivity 6,7 LNA ...

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Table 9. FM Receiver Characteristics (V = 2 1. Parameter 3,4,5,6,12,13 Blocking Sensitivity 3,4,5,6,12,13 Intermode Sensitivity 6,10 Audio Output Load Resistance 6,10 Audio Output Load Capacitance 6 Seek/Tune Time ...

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Si4734/35-C40 Table 10. 64–75.9 MHz Input Frequency FM Receiver Characteristics (V = 2 1. Parameter Input Frequency Sensitivity with Headphone 3,4,5 Network 7 LNA Input Resistance 7 LNA Input ...

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Table 11. AM/SW/LW Receiver Characteristics (V = 2 1. – ° Parameter Symbol Input Frequency 3,4,5,6 Sensitivity Large Signal Voltage 4,6,7 Handling 6 Power Supply Rejection ...

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Si4734/35-C40 Table 12. Reference Clock and Crystal Characteristics (V = 2 1. Parameter 1 RCLK Supported Frequencies 2 RCLK Frequency Tolerance REFCLK_PRESCALE REFCLK Crystal Oscillator Frequency 2 Crystal Frequency ...

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Typical Application Schematic (QFN FMI FMI C4 3 RFGND AMI C5 5 RST RST SEN SCLK SDIO RCLK VIO 1.85 to 3.6 V Notes: 1. Place C1 close to V pin ...

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Si4734/35-C40 3. Typical Application Schematic (SSOP) Optional: Digital Audio Output DOUT C4 DFS GPO3/DCLK GPO2/INT GPO1 NC NC FMI C4 RFGND GPIO3 C2 Optional: for crystal oscillator option Notes: 1. Place C1 close to ...

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Bill of Materials (QFN/SSOP) Component(s) C1 Supply bypass capacitor, 22 nF, ±20%, Z5U/X7R C5 Coupling capacitor, 0.47 µF, ±20%, Z5U/X7R L1 Ferrite loop stick, 180 L2 4.7 µH U1 Si4734/35 AM/FM Radio Tuner C2, C3 Crystal load capacitors, 22 ...

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... The Si4735 incorporates a digital processor for the European Radio Data System (RDS) and the North American Radio Broadcast Data System (RBDS), including all synchronization, error detection, and error correction functions ...

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... AMI and processed by the AM front-end circuitry. In addition to the receiver mode, there is a clocking mode to choose to clock the Si4734/35 from a reference clock or crystal. On the Si4735, there is an audio output mode to choose between an analog and/or digital audio output. In the analog audio output mode, ROUT and LOUT are used for the audio output pins ...

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Si4734/35-C40 order, down to the LSB. The left channel is transferred first when the DFS is high, and the right channel is transferred when the DFS is low. In DSP mode, the DFS becomes a pulse with a width of ...

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... Output left and right channels are obtained by adding and subtracting the (L+R) and (L–R) signals respectively. The Si4735 uses frequency information from the 19 kHz stereo pilot to recover the 57 kHz RDS/RBDS signal. 5.8.2. Stereo-Mono Blending ...

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... The Si4735 device is user configurable and provides an optional interrupt when RDS is synchronized, loses synchronization, and/or the user configurable RDS FIFO threshold has been met. The Si4735 reports RDS decoder synchronization status and detailed bit errors in the information word for each RDS block with the FM_RDS_STATUS command. The range of reportable block errors is 0, 1– ...

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RST is low, and the GPO2 pin includes an internal pull- down resistor, which is connected while RST is low. Therefore only necessary for the user to actively drive pins which differ from these states. See Table 13. ...

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Si4734/35-C40 5.16.3. SPI Control Interface Mode When selecting SPI mode, the user must ensure that a rising edge of SCLK does not occur within 300 ns before the rising edge of RST. SPI bus mode uses the SCLK, SDIO, and ...

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... Queries the status of the Received Signal Quality (RSQ) of the current channel. Returns RDS information for current channel and reads an entry from the RDS FIFO (Si4735 only). Selects the AM/SW/LW tuning frequency. Begins searching for a valid frequency. Queries the status of the RSQ of the current channel. ...

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Si4734/35-C40 Prop Name 0x1100 FM_DEEMPHASIS FM_BLEND_STEREO_ 0x1105 THRESHOLD FM_BLEND_MONO_ 0x1106 THRESHOLD FM_RSQ_INT_ 0x1200 SOURCE 0x1300 FM_SOFT_MUTE_RATE FM_SOFT_MUTE_ 0x1302 MAX_ATTENUATION FM_SOFT_MUTE_ 0x1303 SNR_THRESHOLD FM_SEEK_BAND_ 0x1400 BOTTOM 0x1401 FM_SEEK_BAND_TOP FM_SEEK_FREQ_ 0x1402 SPACING FM_SEEK_TUNE_ 0x1403 SNR_THRESHOLD FM_SEEK_TUNE_ 0x1404 RSSI_TRESHOLD 0x1500 RDS_INT_SOURCE 0x1501 RDS_INT_FIFO_COUNT ...

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Table 15. Selected Si473x Properties (Continued) Prop Name 0x3401 AM_SEEK_BAND_TOP AM_SEEK_FREQ_ 0x3402 SPACING AM_SEEK_SNR_ 0x3403 THRESHOLD AM_SEEK_RSSI_ 0x3404 THRESHOLD 0x4000 RX_VOLUME 0x4001 RX_HARD_MUTE Description Sets the top of the AM/SW/LW band for seek. Selects frequency spacing for AM/SW/LW seek. Default ...

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Si4734/35-C40 7. Pin Descriptions: Si4734/35-GM RFGND Pin Number(s) Name connect. Leave floating. 2 FMI FM RF inputs. FMI should be connected to the antenna trace. 3 RFGND RF ground. Connect to ground plane on PCB. 4 ...

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Pin Descriptions: Si4734/35-GU Pin Number(s) Name 1 DOUT Digital output data in digital output mode. 2 DFS Digital frame synchronization input in digital output mode. 3 GPO3/DCLK General purpose output, crystal oscillator, or digital bit synchronous clock input in ...

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... AM/FM/SW/LW Broadcast Radio Receiver Si4735-C40-GM AM/FM/SW/LW Broadcast Radio Receiver with RDS/RBDS Si4735-C40-GU AM/FM/SW/LW Broadcast Radio Receiver with RDS/RBDS *Note: Add an “(R)” at the end of the device part number to denote tape and reel option; 2500 quantity per reel. SSOP devices operate down ° ...

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... Circle = 0.5 mm Diameter (Bottom-Left Justified Year WW = Workweek Si4734/35-C40 3540 CTTT YWW 34 = Si4734 Si4735 Firmware Revision 4. Revision C Die. Internal tracking code. Pin 1 Identifier. Assigned by the Assembly House. Corresponds to the last significant digit of the year and work week of the mold date. Rev. 1.0 ...

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... Top Mark Explanation (SSOP) Mark Method: YAG Laser Part Number Line 1 Marking: Die Revision Firmware Revision YY = Year Line 2 Marking Work week TTTTTT = Manufacturing code 34 4734C40GU YYWWTTTTTT 4734 = Si4734; 4735 = Si4735 Revision C die Firmware Revision 4.0. Assigned by the Assembly House. Rev. 1.0 ...

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Package Outline: Si4734/35 QFN Figure 14 illustrates the package details for the Si4734/35. Table 16 lists the values for the dimensions shown in the illustration. Figure 14. 20-Pin Quad Flat No-Lead (QFN) Symbol Millimeters Min Nom A 0.50 0.55 ...

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Si4734/35-C40 12. PCB Land Pattern: Si4734/35 QFN Figure 15 illustrates the PCB land pattern details for the Si4734/35-C40-GM QFN. Table 17 lists the values for the dimensions shown in the illustration. 36 Figure 15. PCB Land Pattern Rev. 1.0 ...

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Table 17. PCB Land Pattern Dimensions Symbol Millimeters Min Max D 2.71 REF D2 1.60 1.80 e 0.50 BSC E 2.71 REF E2 1.60 1.80 f 2.53 BSC GD 2.10 — Notes: General 1. All dimensions shown are in millimeters ...

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Si4734/35-C40 13. Package Outline: Si4734/35 SSOP Figure 16 illustrates the package details for the Si4734/35. Table 18 lists the values for the dimensions shown in the illustration. Dimension θ aaa ...

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PCB Land Pattern: Si4734/35 SSOP Figure 17 illustrates the PCB land pattern details for the Si4734/35-C40-GU SSOP. Table 19 lists the values for the dimensions shown in the illustration. Table 19. PCB Land Pattern Dimensions Dimension ...

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Si4734/35-C40 15. Additional Reference Resources Contact your local sales representatives for more information or to obtain copies of the following references:  EN55020 Compliance Test Certificate  AN332: Si47xx Programming Guide  AN383: Si47xx Antenna, Schematic, Layout, and Design Guidelines ...

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OCUMENT HANGE IST Revision 0.71 to Revision 1.0  Updated patent information on page 1.  Pin 22 changed from “GND” to “DBYP.”  Updated Table 1 on page 4.  Updated Table 3 on page 5. ...

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