- Silicon Laboratories, Inc. Radio User Manual

Si4734/35-B20
Rev. 1.0 15
Table 11. AM/SW/LW Receiver Characteristics
1
(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
Long Wave (LW) 153 — 279 kHz
Medium Wave (AM) 520 — 1710 kHz
Short Wave (SW) 2.3 — 21.85 MHz
Sensitivity
2,3,4,5, 6
(S+N)/N = 26 dB — 25 35 µV EMF
Large Signal Voltage Handling
5,7
THD < 8% — 300 — mV
RMS
Power Supply Rejection Ratio ΔV
DD
=100 mV
RMS
, 100 Hz — 40 — dB
Audio Output Voltage
2,8
54 60 67 mV
RMS
Audio S/N
2,3,4,6,8
50 56 — dB
Audio THD
2,4,8
— 0.1 0.5 %
Antenna Inductance
Long Wave (LW) — 2800 —
µH
Medium Wave (AM) 180 — 450
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, Δf = 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.