SI4739-B20-GMR Datasheet, PDF (14/24 Pages) Silicon Laboratories – BROADCAST MULTI-BAND RADIO RECEIVER

Si473x-B20
Table 9. WB Receiver Characteristics¹
(V_DD = 2.7 to 5.5 V, VIO = 1.5 to 3.6V, T_A = 25 °C)
Parameter
Symbol
Input Frequency
f_R
Test Condition
Min Typ Max Unit
162.4 — 162.55 MHz
Sensitivity^2,3
SINAD = 12 dB
—
0.9
— µV EMF
Adjacent Channel Selectivity
±25 kHz
—
52
—
dB
Audio S/N^2,3,4,5
Audio Frequency Response Low⁶
Mono
–3 dB
—
45
—
dB
—
—
300
Hz
Audio Frequency Response High⁶
–3 dB
3
—
—
kHz
Notes:
1. 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.
2. F_MOD = 1 kHz.
3. f = 3 kHz.
4. V_EMF = 1 mV.
5. A-weighted.
6. Guaranteed by characterization
Table 10. Reference Clock and Crystal Characteristics
(V_DD = 2.7 to 5.5 V, V_IO = 1.5 to 3.6 V, T_A = –20 to 85 °C)
Parameter
Symbol Test Condition
RCLK Supported Frequencies¹
RCLK Frequency Tolerance²
Reference Clock
REFCLK_PRESCALE
Min
Typ
Max
Unit
31.130 32.768 40,000 kHz
–100
—
100
ppm
1
—
4095
REFCLK
31.130 32.768 34.406 kHz
Crystal Oscillator
Crystal Oscillator Frequency
Crystal Frequency Tolerance²
—
32.768
—
kHz
–50
—
50
ppm
Board Capacitance
—
—
3.5
pF
Notes:
1. The Si473x divides the RCLK input by REFCLK_PRESCALE to obtain REFCLK. There are some RCLK frequencies
between 31.130 kHz and 40 MHz that are not supported. See “AN332: Si47xx Programming Guide,” Table 6 for more
details.
2. A frequency tolerance of ±50 ppm is required for FM seek/tune using 50 kHz channel spacing, SW seek/tune, and WB
tune.
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Rev. 0.5