Datasheet

ManualsBrandsLINEAR TECHNOLOGY ManualsData collecting ICsData acquisition IC - AD converter (ADC) External , Internal QFN 52

LTC2172-14/

LTC2171-14/LTC2170-14

19

21721014fb

FuncTional block DiagraM

PLL

DATA

SERIALIZER

SAMPLE-

AND-HOLD

14-BIT

ADC CORE

CHANNEL 1

ANALOG

INPUT

14-BIT

ADC CORE

CHANNEL 2

ANALOG

INPUT

14-BIT

ADC CORE

CHANNEL 3

ANALOG

INPUT

14-BIT

ADC CORE

CHANNEL 4

ANALOG

INPUT

1.8V

V

DD

1.8VENC

+

ENC

–

OV

DD

V

DD

/2

DIFF

REF

AMP

REF

BUF

2.2µF

0.1µF 0.1µF

0.1µF

REFH REFL

RANGE

SELECT

1.25V

REFERENCE

REFH REFL

OUT1A

OUT1B

OUT2A

OUT2B

OUT3A

OUT3B

OUT4A

OUT4B

DATA

CLOCKOUT

FRAME

OGND

VCM12

GND VCM34

0.1µF0.1µF

SDOCS

SENSE

V

REF

1µF

MODE

CONTROL

REGISTERS

SCKPAR/SER SDI

217214 F01

SAMPLE-

AND-HOLD

SAMPLE-

AND-HOLD

SAMPLE-

AND-HOLD

Figure 1. Functional Block Diagram