|
SI4736-B20 Datasheet, PDF (12/38 Pages) Silicon Laboratories – BROADCAST WEATHER BAND RADIO RECEIVER | |||
|
◁ |
Si4736/37/38/39-B20
Table 9. FM Receiver Characteristics1,2
(VDD = 2.7 to 5.5 V, VIO = 1.5 to 3.6 V, TA = â20 to 85 °C)
Parameter
Symbol
Test Condition
Min Typ Max
Unit
Input Frequency
fRF
Sensitivity with Headphone Net-
work3,4,5
Sensitivity with 50 ï Network3,4,5,6
RDS Sensitivity6
LNA Input Resistance6,7
LNA Input Capacitance6,7
Input IP36,8
(S+N)/N = 26 dB
(S+N)/N = 26 dB
ïf = 2 kHz,
RDS BLER < 5%
76
â
108
MHz
â
2.2
3.5 µV EMF
â
1.1
â µV EMF
â
15
â µV EMF
3
4
4
5
100
105
5
kï
6
pF
â dBµV EMF
AM Suppression3,4,6,7
m = 0.3
40
50
â
dB
Adjacent Channel Selectivity
±200 kHz
35
50
â
dB
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/N3,4,5,7,10
Audio Stereo S/N4,5,7,10,11
Audio THD3,7,9
De-emphasis Time Constant6
±400 kHz
60
70
â
dB
In-band
35
â
â
dB
72
80
90
mVRMS
â
â
1
dB
â3 dB
â
â
30
Hz
â3 dB
15
â
â
kHz
25
â
â
dB
55
63
â
dB
â
58
â
dB
â
0.1
0.5
%
FM_DEEMPHASIS = 2 70
75
80
µs
FM_DEEMPHASIS = 1 45
50
54
µs
Audio Output Load Resistance6,10
RL
Audio Output Load Capacitance6,10
CL
Single-ended
Single-ended
10
â
â
kï
â
â
50
pF
Notes:
1. Additional testing information is available in Application Note AN388. Volume = maximum for all tests. Tested at
RF = 98.1 MHz.
2. To ensure proper operation and receiver performance, follow the guidelines in âAN383: Antenna Selection and
Universal Layout 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. Refer to "6. Pin Descriptions: Si4736/37/38/39-GM" on page 29.
9. ïf = 75 kHz.
10. At LOUT and ROUT pins.
11. Analog audio output mode.
12. At temperature (25 °C).
12
Rev. 1.0
|
▷ |