SI4704-D50 Datasheet, PDF (14/34 Pages) Silicon Laboratories – BROADCAST FM RADIO RECEIVER FOR CONSUMER

Si4704/05-D50
Table 10. Reference Clock and Crystal Characteristics
(V_A = 2.7 to 5.5 V, V_D = 1.62 to 3.6 V, T_A = –20 to 85 °C)
Parameter
Symbol
Test Condition
Min Typ Max Unit
RCLK Supported Frequencies^1,2
RCLK Frequency Tolerance^1,3
REFCLK_PRESCALE^1,2
REFCLK¹
Reference Clock
31.130 32.768 40,000 kHz
–100
—
100
ppm
1
—
4095
31.130 32.768 34.406 kHz
Crystal Oscillator Frequency¹
Crystal Frequency Tolerance^1,3
Board Capacitance¹
Crystal Oscillator
— 32.768 —
kHz
–100
—
100
ppm
—
—
3.5
pF
ESR
40
k
C_L Single-ended
12
pF
Notes:
1. Guaranteed by characterization.
2. The Si4704/05 divide 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.
3. A frequency tolerance of ±50 ppm is required for FM seek/tune using 50 kHz channel spacing.
14
Rev. 1.0