MB88162 Просмотр технического описания (PDF) - Fujitsu

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MB88162

Spread Spectrum Clock Generator

Fujitsu 

MB88162

■ BLOCK DIAGRAM

VDD

OE

MLTP

SPRD

S0

S1

XOUT

Output enable

Power

Down

Multiplication rate setting

Modulation type setting

Modulation rate setting

Modulation rate setting

4 pF

Reference

clock

Power

Down

XIN

Rf = 500 kΩ

4 pF

VSS

PLL block

Hi-Z

control

OUT

Modulation

clock output

1

−

M

Reference clock 1

−

N

Phase Charge

compare pump

V/I

conversion

Loop filter

IDAC

ICO

Modulation clock

output

1

Modulation

−

Modulation logic

rate setting

L

S0, S1

MB88162 PLL block

A glitchless IDAC (current output D/A converter) provides precise modulation,

thereby dramatically reducing EMI.

6

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