LTC6909 查看數據表（PDF） - Linear Technology

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LTC6909

1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation

Linear Technology 

BLOCK DIAGRAM

V+A

1

RSET

16

SET

VSET

VBIAS

+

–

ISET

=

V+ – VSET

RSET

PH0 PH1 PH2

3 4 15

fMASTER = 20MHz • 10k •

(SSFM = OFF)

IMASTER

V+ – VSET

= 20MHz • 10k/RSET

MASTER

OSCILLATOR

V

OUT

1 POLE

LPF

IMASTER

OUTPUT

PHASING

DRIVERS

IREF

MDAC

V+

–+

MOD 14

GND 2

–+

GND

PSEUDORANDOM

CODE GENERATOR

POR

3-STATE

INPUT DECODER

DETECT

WHEN A CLOCK SIGNAL IS PRESENT AT THE

CLOCK INPUT MOD PIN INPUT, THE MODULATION IS DISABLED

OUTPUT

Hi-Z

UNTIL

STABLE

DIVIDE BY

16/32/64

LTC6909

V+D

13

DRIVER

DRIVER

DRIVER

DRIVER

DRIVER

DRIVER

DRIVER

DRIVER

5 OUT1

6 OUT2

7 OUT3

8 OUT4

9 OUT5

10 OUT6

11 OUT7

12 OUT8

6909 BD

6909f

7

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