SI4735-D60-GM(2013) Просмотр технического описания (PDF) - Silicon Laboratories

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производитель

SI4735-D60-GM
(Rev.:2013)

BROADCAST AM/FM/SW/LW RADIO RECEIVER

Silicon Laboratories 

Si4730/31/34/35-D60

Table 10. Reference Clock and Crystal Characteristics

(VA = 2.7 to 5.5 V, VD = 1.62 to 3.6 V, TA = –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

TA

–20

25

85

Junction Temperature

TJ

—

—

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

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