Si4777 datasheet(9/54 Pages) SILABS

部件名	Si4777

功能描述	HIGH-PERFORMANCE CONSUMER ELECTRONICS

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制造商	SILABS [Silicon Laboratories]

网页	http://www.silabs.com

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9 / 54 page

Si4770/77-A20

Rev. 0.9

9

Table 5. Reference Clock and Crystal Characteristics

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Reference Clock, Pin RCLK

RCLK Supported

Frequencies

—

36.4

37.8

37.209375

—MHz

RCLK Frequency

Tolerance

–100

—

100

ppm

RCLK = 36.4 MHz, 37.8 MHz, 37.209375 MHz

Phase Noise

100 Hz offset

—

–86

dBc/Hz

1 kHz offset

—

–101

dBc/Hz

10 kHz offset

—

–108

dBc/Hz

≥ 100 kHz offset

—

–122

dBc/Hz

Input Capacitance

—

7

—

pF

Input Voltage

AC coupling capacitor = 1 µF

Square wave input

400

mVPP

AC coupling capacitor = 1 µF

Sine wave input

300

—

900

mVPP

Crystal Oscillator, Pins XTAL1, XTAL2

Crystal Frequency

—

36.4

37.8

37.209375

—MHz

Crystal Frequency

Tolerance

–100

—

100

ppm

Load Capacitance, Pro-

grammable, Each Pin to

GND

5

—

21.8

pF

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