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SI4736-C40-GUR Datasheet, PDF (14/42 Pages) Silicon Laboratories – BROADCAST AM/FM RADIO RECEIVER | |||
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Si4736/37/38/39-C40
Table 10. 64â75.9 MHz Input Frequency FM Receiver Characteristics1,2,6
(VDD = 2.7 to 5.5 V, VIO = 1.85 to 3.6 V, TA = â20 to 85 °C)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Input Frequency
Sensitivity with Headphone Net-
work3,4,5
LNA Input Resistance7
LNA Input Capacitance7
Input IP38
fRF
64
â
75.9
MHz
(S+N)/N = 26 dB
â
4.0
â
µV EMF
3
4
4
5
100
105
5
kï
6
pF
â dBµV EMF
AM Suppression3,4,7
m = 0.3
40
50
â
dB
Adjacent Channel Selectivity
±200 kHz
â
50
â
dB
Alternate Channel Selectivity
Audio Output Voltage3,4,7
Audio Output L/R Imbalance3,7,9
±400 kHz
â
70
â
dB
72
80
90
mVRMS
â
â
1
dB
Audio Frequency Response Low
â3 dB
â
â
30
Hz
Audio Frequency Response High
Audio Mono S/N3,4,5,7,10
Audio THD3,7,9
â3 dB
15
â
â
kHz
55
63
â
dB
â
0.1
0.5
%
De-emphasis Time Constant
FM_DEEMPHASIS = 2 70
75
80
µs
FM_DEEMPHASIS = 1 45
50
54
µs
Audio Output Load Resistance10
RL
Audio Output Load Capacitance10
CL
Seek/Tune Time
Single-ended
10
â
â
kï
Single-ended
â
â
50
pF
RCLK tolerance
â
â
60 ms/channel
= 100 ppm
Powerup Time
RSSI Offset11
From powerdown
â
â
110
ms
Input levels of 8 and â3
â
3
dB
60 dBµV EMF
Notes:
1. Additional testing information is available in âAN388: Si470x/1x/2x/3x/4x Evaluation Board Test Procedure.â
Volume = maximum for all tests. Tested at RF = 98.1 MHz.
2. To ensure proper operation and receiver performance, follow the guidelines in âAN383: Si47xx Antenna, Schematic,
Layout, and Design Guidelines.â 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. ïf = 22.5 kHz.
5. BAF = 300 Hz to 15 kHz, A-weighted.
6. Guaranteed by characterization.
7. VEMF = 1 mV.
8. |f2 â f1| > 2 MHz, f0 = 2 x f1 â f2. AGC is disabled.
9. ïf = 75 kHz.
10. At LOUT and ROUT pins.
11. At temperature (25 °C).
14
Rev. 1.0
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