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Si4730/31-D50
Table 10. AM Receiver Characteristics 1,2
(V A = 2.7 to 5.5 V, V D = 1.62 to 3.6 V, TA = –20 to 85 °C)
Parameter
Input Frequency
Symbol
f RF
Test Condition
Min
520
Typ
—
Max
1710
Unit
kHz
Sensitivity
3,5,6
(S+N)/N = 26 dB
—
25
35
μV EMF
Large Signal Voltage Handling 6,7
Power Supply Rejection Ratio 6
THD < 8%
? V A = 100 mV RMS , 100 Hz
—
—
300
40
—
—
mV RMS
dB
Audio Output Voltage
3,8
54
60
67
mV RMS
Audio THD
Audio S/N 3,5,8
3,8
Antenna Inductance 6,9
50
—
180
60
0.1
—
—
0.5
450
dB
%
μH
Powerup Time
6
From powerdown
—
—
110
ms
Notes:
1. Additional testing information is available in “AN388: Si470x/1x/2x/3x/4x Evaluation Board Test Procedure.”
Volume = maximum for all tests. Tested at RF = 520 kHz.
2. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Si47xx Antenna, Schematic,
Layout, and Design Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
3. FMOD = 1 kHz, 30% modulation, 2 kHz channel filter.
4. Analog audio output mode.
5. B AF = 300 Hz to 15 kHz, A-weighted.
6. Guaranteed by characterization.
7. See “AN388: Si470x/1x/2x/3x/4x Evaluation Board Test Procedure” for evaluation method.
8. V IN = 5 mVrms.
9. Stray capacitance on antenna and board must be < 10 pF to achieve full tuning range at higher inductance levels.
14
Rev. 1.0
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