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Si4730/31-D50
Table 8. FM Receiver Characteristics 1,2
(V A = 2.7 to 5.5 V, V D = 1.62 to 3.6 V, T A = –20 to 85 °C, 76–108 MHz)
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Input Frequency
Sensitivity 3,4,5
f RF
(S+N)/N = 26 dB
76
—
—
2.2
108
3.5
MHz
μV EMF
RDS
Sensitivity 6
? f = 2 kHz,
—
11
—
μV EMF
RDS BLER < 5%
LNA Input Capacitance
LNA Input Resistance 6,7
6,7
Input IP3 6,8
3
4
100
4
5
105
5
6
—
k ?
pF
dBμV EMF
AM
Suppression 3,4,6,7
m = 0.3
40
50
—
dB
Audio Output Voltage
Audio Output L/R Imbalance
Adjacent Channel Selectivity
Alternate Channel Selectivity
Spurious Response Rejection 6
3,4,7
3,7,9
Audio Frequency Response Low 6
Audio Frequency Response High 6
±200 kHz
±400 kHz
In-band
–3 dB
–3 dB
35
60
35
72
—
—
15
50
70
—
80
—
—
—
—
—
—
90
1
30
—
dB
dB
dB
mV RMS
dB
Hz
kHz
Audio Stereo Separation
7,9
35
42
—
dB
Audio Mono
S/N 3,4,5,7
55
63
—
dB
Audio Stereo S/N 4,5,6,7
Audio THD 3,7,9
—
—
58
0.1
—
0.5
dB
%
De-emphasis Time Constant
Blocking Sensitivity
6
3,4,5,6,12,13
FM_DEEMPHASIS = 2
FM_DEEMPHASIS = 1
? f = ±400 kHz
? f = ±4 MHz
70
45
—
—
75
50
34
30
80
54
—
—
μs
μs
dBμV
dBμV
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 = 98.1 MHz.
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. F MOD = 1 kHz, 75 μ s de-emphasis, MONO = enabled, and L = R unless noted otherwise.
4. ? f = 22.5 kHz.
5. B AF = 300 Hz to 15 kHz, A-weighted.
6. Guaranteed by characterization.
7. V EMF = 1 mV.
8. |f 2 – f 1 | > 2 MHz, f 0 = 2 x f 1 – f 2 . AGC is disabled.
9. ? f = 75 kHz.
10. At L OUT and R OUT pins.
11. Analog audio output mode.
12. Blocker Amplitude = 100 dBμV
13. Sensitivity measured at (S+N)/N = 26 dB.
14. At temperature (25°C).
Rev. 1.0
11
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