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SI4730-D50 Datasheet, PDF (15/34 Pages) Silicon Laboratories – BROADCAST AM/FM RADIO RECEIVER | |||
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Si4730/31-D50
Table 11. Reference Clock and Crystal Characteristics
(VA = 2.7 to 5.5 V, VD = 1.62 to 3.6 V, TA = â20 to 85 °C)
Parameter
Symbol Test Condition
Min
Typ
Max
Unit
RCLK Supported Frequencies1
RCLK Frequency Tolerance2
REFCLK_PRESCALE
REFCLK
Reference Clock
31.130 32.768 40,000 kHz
â100
â
100
ppm
1
â
4095
31.130 32.768 34.406 kHz
Crystal Oscillator
Crystal Oscillator Frequency
Crystal Frequency Tolerance2
â
32.768
â
kHz
â100
â
100
ppm
Board Capacitance
â
â
3.5
pF
ESR
â
40
â
ï
CL Single-ended
â
12
â
pF
Notes:
1. The Si4730/31 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. For more details, see Table 6 of âAN332: Si47xx
Programming Guideâ.
2. A frequency tolerance of ±50 ppm is required for FM seek/tune using 50 kHz channel spacing.
Rev. 1.0
15
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