SI4730-D60-GU Datasheet, PDF (16/42 Pages) Silicon Laboratories – BROADCAST AM/FM/SW/LW RADIO RECEIVER

Si4730/31/34/35-D60
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
RCLK Supported Frequencies¹
RCLK Frequency Tolerance²
REFCLK_PRESCALE
REFCLK
Symbol Test Condition
Reference Clock
Min
Typ
Max
Unit
31.130 32.768 40,000 kHz
–100
—
100
ppm
1
—
4095
31.130 32.768 34.406 kHz
Crystal Oscillator Frequency
Crystal Frequency Tolerance²
Board Capacitance
ESR
CL³
CL–single ended³
Crystal Oscillator
—
32.768
—
kHz
–100
—
100
ppm
—
—
3.5
pF
—
—
50

7
12
22
pF
14
24
44
pF
Notes:
1. The Si473x-D60 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 “AN332: Si47xx
Programming Guide”.
2. A frequency tolerance of ±50 ppm is required for FM seek/tune using 50 kHz channel spacing and AM seek/tune in SW
frequencies.
3. Guaranteed by characterization.
Table 11. Thermal Conditions
Parameter
Symbol
Min
Typ
Max
Thermal Resistance*
_JA
—
80
—
Ambient Temperature
T_A
–20
25
85
Junction Temperature
T_J
—
—
92
*Note: Thermal resistance assumes a multi-layer PCB with the exposed pad soldered to a topside PCB pad.
Unit
°C/W
°C
°C
16
Rev. 1.2