SI4702-C19 Ver la hoja de datos (PDF) - Silicon Laboratories

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SI4702-C19

BROADCAST FM RADIO TUNER FOR PORTABLE APPLICATIONS

Silicon Laboratories 

Si4702/03-C19

2. Typical Application Schematic

GPIO1

GPIO2

GPIO3

FMIP

RFGND

1

2

3

4

5

NC

FMIP

RFGND

GND

RST

GND

PAD

GND 15

LOUT 14

ROUT 13

GND 12

VD 11

LOUT

ROUT

C1

VBATTERY

2.7 to 5.5 V

RST

SEN

SCLK

SDIO

RCLK

VIO

1.5 to 3.6 V

GPIO3

X1

RCLK

C2

C3

Optional: for crystal oscillator option

Notes:

1. Place C1 close to VD pin.

2. All grounds connect directly to GND plane on PCB.

3. Pins 1 and 20 are no connects, leave floating.

4. Important Note: FM Receiver performance is subject to adherence to antenna design guidelines in “AN231:

Si4700/01/02/03 Headphone and Antenna Interface.” Failure to use these guidelines will negatively affect the

performance of the Si4702/03-C19, particularly in weak signal and noisy environments. Silicon Laboratories will evaluate

schematics and layouts for qualified customers.

5. Pin 2 connects to the antenna interface, refer to “AN231: Si4700/01/02/03 Headphone and Antenna Interface.”

6. Place Si4702/03-C19 as close as possible to antenna jack and keep the FMIP trace as short as possible.

7. Refer to Si4702/03 Internal Crystal Oscillator Errata.

8. Refer to "AN299: External 32.768 kHz Crystal Oscillator."

3. Bill of Materials

Component(s)

C1

U1

C2, C3

X1

Value/Description

Supply bypass capacitor, 22 nF, ±20%, Z5U/X7R

Si4702/03-C19 FM Radio Tuner

Crystal load capacitors, 22 pF, ±5%, COG (Optional: for

crystal oscillator option)

32.768 kHz crystal (Optional: for crystal oscillator option)

Supplier(s)

Murata

Silicon Laboratories

Venkel

Epson

14

Rev. 1.1

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