SI4704-D50 데이터 시트보기 (PDF) - Silicon Laboratories
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SI4704-D50 Datasheet PDF : 34 Pages
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Si4704/05-D50
Table 8. FM Receiver Characteristics1,2
(VA = 2.7 to 5.5 V, VD = 1.62 to 3.6 V, TA = –20 to 85 °C, 76–108 MHz)
Parameter
Symbol
Test Condition
Min Typ Max
Unit
Input Frequency
Sensitivity3,4,5
RDS Sensitivity6
LNA Input Resistance6,7
LNA Input Capacitance6,7
Input IP36,8
AM Suppression3,4,6,7
Adjacent Channel Selectivity
Alternate Channel Selectivity
Spurious Response Rejection6
Audio Output Voltage3,4,7
Audio Output L/R Imbalance3,7,9
Audio Frequency Response Low6
Audio Frequency Response High6
Audio Stereo Separation7,9
Audio Mono S/N3,4,5,7
Audio Stereo S/N4,5,6,7
Audio THD3,7,9
De-emphasis Time Constant6
Blocking Sensitivity3,4,5,6,12,13
fRF
76
—
108
MHz
(S+N)/N = 26 dB
—
2.2
3.5 µV EMF
f = 2 kHz,
RDS BLER < 5%
—
11
— µV EMF
3
4
5
k
4
5
6
pF
100 105
— dBµV EMF
m = 0.3
40
50
—
dB
±200 kHz
35
50
—
dB
±400 kHz
60
70
—
dB
In-band
35
—
—
dB
72
80
90
mVRMS
—
—
1
dB
–3 dB
—
—
30
Hz
–3 dB
15
—
—
kHz
35
42
—
dB
55
63
—
dB
—
58
—
dB
—
0.1
0.5
%
FM_DEEMPHASIS = 2 70
75
80
µs
FM_DEEMPHASIS = 1 45
50
54
µs
f = ±400 kHz
—
34
—
dBµV
f = ±4 MHz
—
30
—
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. 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.
9. f = 75 kHz.
10. At LOUT and ROUT 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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