SI4736-B20 Datasheet, PDF (14/38 Pages) Silicon Laboratories – BROADCAST WEATHER BAND RADIO RECEIVER

Si4736/37/38/39-B20
Table 11. AM Receiver Characteristics¹
(V_DD = 2.7 to 5.5 V, V_IO = 1.5 to 3.6 V, TA = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min Typ Max
Unit
Input Frequency
f_RF
Sensitivity^{2,3,4,5, 6}
Large Signal Voltage Handling^5,7
Power Supply Rejection Ratio
Audio Output Voltage^2,8
Audio S/N^2,3,4,6,8
Audio THD^2,4,8
Antenna Inductance^5,9
520 — 1710
kHz
(S+N)/N = 26 dB
—
25
35
µV EMF
THD < 8%
— 300 —
∆V_DD = 100 mV_RMS, 100 Hz —
40
—
54
60
67
50
56
—
mV_RMS
dB
mV_RMS
dB
—
0.1
0.5
%
180 — 450
µH
Powerup Time
From powerdown
—
— 110
ms
Notes:
1. To ensure proper operation and receiver performance, follow the guidelines in “AN383: Antenna Selection and
Universal Layout Guidelines.” Silicon Laboratories will evaluate schematics and layouts for qualified customers.
2. FMOD = 1 kHz, 30% modulation, A-weighted, 2 kHz channel filter.
3. B_AF = 300 Hz to 15 kHz, A-weighted.
4. f_RF = 1000 kHz, f = 10 kHz.
5. Guaranteed by characterization.
6. Analog audio output mode.
7. See “AN388: 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