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S1M8823

更新时间： 2022-11-24 21:44:57

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S1M8823 数据手册

INTERGER RF/IF DUAL PLL

S1M8821/22/23

PIN DESCRIPTION (Continued)

Pin No

(20TSSOP) (24QFN)

Pin No

Symbol

I / O

Description

finIF

The complementary input of the IF prescaler. A bypass

capacitor must be placed as close as possible to this pin and

be connected directly to the ground plane. The bypass

capacitor is optional with some loss of sensitivity.

finIF

GND

IF prescaler input. The signal comes from the external VCO.

Ground for IF digital blocks.

CPoIF

Internal IF charge pump output for connection to an external

loop filter whose filtered output drives an external VCO.

N/C

No connection.

Vp2

V^DD2

Power supply voltage input for IF charge pump( ≥ V^DD2)

Power supply voltage input for the IF PLL part. V^DD1 must

equal V^DD2. In order to reject supply noise, bypass capacitors

must be placed as close as possible to this pin and be

connected directly to the ground plane.

1...4 5 678 9 10...22

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