LTC6953 datasheet(22/56 Pages) AD

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LTC6953

Rev 0

For more information www.analog.com

Preliminary Technical Data

Advance Product Information Subject to Change

Rev PrA

Figure 10. Flowchart to Determine the Best Synchronization Protocol for a Given Application

START

INPUTS:

TP = TOTAL NUMBER OF JESD DEVICE CLOCK/SYSREF PAIRS

LNP = NUMBER OF JESD PAIRS REQUIRING LOW

NOISE (< 100fs) DEVICE CLOCKS

TS = TOTAL NUMBER OF STAND ALONE CLOCK SIGNALS

LNS = NUMBER OF REQUIRED LOW

NOISE (< 100fs) STAND ALONE CLOCKS

T = 2TP + TS

INPUTS:

T = TOTAL NUMBER OF CLOCK SIGNALS

LNS = NUMBER OF REQUIRED LOW

NOISE (< 100fs) CLOCKS

JESD204B

APPLICATION?

NOTE: CEILING() FUNCTION MEANS ROUND

UP TO NEXT HIGHEST INTEGER.

YES

T ≤ 11?

YES

T ≤ 11?

YES

USE EZSync

STANDALONE

USE EZSync MULTICHIP

WITH REQUEST PASS-

THROUGH (1 CONTROLLER

AND P FOLLOWERS)

USE ParallelSync WITH

LTC6953 REFERENCE

DISTRIBUTION

(P PARALLEL PARTS)

T ≤ 56

AND TP ≤ 25

AND LNS

≤ 11 – P2 – 2LNP

AND LNP

≤ 5 – P?

YES

T ≤ 56

AND LNS

≤ 11 – 2P?

YES

T ≤ 25

AND

TP ≤ 25?

T ≤ 121

AND

LNS ≤ 11 – P?

T ≤ 121

AND TP ≤ 55

AND LNS

≤ 11 – P – 2LNP

AND LNP

≤ (55 – TP)/9?

T ≤ 55?

6953 F10

USE STANDARD EZSync

MULTICHIP

(1 CONTROLLER

AND P FOLLOWERS)

USE STANDARD

ParallelSync

MULTICHIP

(P PARALLEL PARTS)

= CEILING MAX





























= CEILING MAX

T – 11

TP – 5





























= CEILING

T – 11













= CEILING

T – 11













= CEILING MAX

T – 11

TP – 5.5

4.5





























= CEILING MAX





























= CEILING













= CEILING













OPERATION

LTC6953 Datasheet(PDF) 22 Page - Analog Devices

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