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SI4720-B20

BROADCAST FM RADIO TRANSCEIVER FOR PORTABLE APPLICATIONS

Silicon Laboratories 

Si4720/21-B20

Table 9. FM Receiver Characteristics1,2 (Continued)

(VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = –20 to 85 °C)

Parameter

Symbol

Test Condition

Min Typ Max

Unit

Audio Output Load Capacitance6,10 CL

Seek/Tune Time6

Powerup Time6

RSSI Offset12

Single-ended

—

RCLK tolerance

—

= 100 ppm

From powerdown

—

Input levels of 8 and

–3

60 dBµV at RF Input

—

50

pF

—

80 ms/channel

—

110

ms

—

3

dB

Notes:

1. Additional testing information is available in Application Note AN388. Volume = maximum for all tests. Tested at

RF = 98.1 MHz.

2. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Antenna Selection and

Universal Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.

3. FMOD = 1 kHz, 75 µs de-emphasis, MONO = enabled, and L = R unless noted otherwise.

4. f = 22.5 kHz.

5. BAF = 300 Hz to 15 kHz, A-weighted.

6. Guaranteed by characterization.

7. VEMF = 1 mV.

8. |f2 – f1| > 2 MHz, f0 = 2 x f1 – f2. AGC is disabled. Refer to "7. Pin Descriptions: Si4720/21-GM" on page 41.

9. f = 75 kHz.

10. At LOUT and ROUT pins.

11. Analog audio output mode.

12. At temperature 25 °C.

14

Rev. 1.0

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