SI4831 Просмотр технического описания (PDF) - Silicon Laboratories

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SI4831

BROADCAST MECHANICAL TUNING AM/FM/SW RADIO RECEIVER

Silicon Laboratories 

Si4831/35-B30

Table 5. FM Receiver Characteristics1,2

(VDD = 2.7 to 3.6 V, TA = –15 to 85 °C)

Parameter

Input Frequency

Sensitivity with Headphone

Network3

LNA Input Resistance4,5

LNA Input Capacitance4,5

AM Suppression4,5,6,7

Input IP34,8

Adjacent Channel Selectivity4

Alternate Channel Selectivity4

Audio Output Voltage5,6,7

Audio Mono S/N5,6,7,9,10

Audio Stereo S/N3,4,5,7,9,10,

Audio Frequency Response Low

Symbol

fRF

Test Condition

(S+N)/N = 26 dB

m = 0.3

±200 kHz

±400 kHz

–3 dB

Min Typ Max Unit

64

—

109

MHz

—

2.2

— µV EMF

—

4

—

k

—

5

—

pF

—

50

—

dB

—

105

— dBµV EMF

—

50

—

dB

—

65

—

dB

—

80

—

mVRMS

—

55

—

dB

—

55

—

dB

—

—

30

Hz

Audio Frequency Response High

–3 dB

15

—

—

kHz

Audio Stereo Separation5,11

Audio THD6,5,11

Audio Output Load Resistance4,10

RL

Audio Output Load Capacitance4,10 CL

Powerup/Band Switch Time4

Single-ended

Single-ended

—

42

—

dB

—

0.1

0.5

%

10

—

—

k

—

—

50

pF

—

—

110

ms

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

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