ADS1271IPWR datasheet(5/40 Pages) TI2

5 / 40 page

ADS1271

SBAS306F − NOVEMBER 2004 − REVISED OCTOBER 2007

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PIN ASSIGNMENTS

PW PACKAGE

TSSOP-16

(TOP VIEW)

VREFP

VREFN

DGND

DVDD

CLK

SCLK

DRDY/FSYNC

DOUT

AINP

AINN

AGND

AVDD

MODE

FORMAT

SYNC/PDWN

DIN

ADS1271

Terminal Functions

NAME

NO.

FUNCTION

DESCRIPTION

AINP

Analog Input

Positive analog input

AINN

Analog Input

Negative analog input

AGND

Analog Input

Analog ground

AVDD

Analog Input

Analog supply

MODE

Digital Input

MODE = 0:

High-Speed mode

MODE

Digital Input

MODE = float:

High-Resolution mode

MODE = 1:

Low-Power mode

FORMAT

Digital Input

FORMAT = 0:

SPI

FORMAT

Digital Input

FORMAT = float:

Modulator output (ADS1271B only)

FORMAT = 1:

Frame-Sync

SYNC/PDWN

Digital Input

Synchronize/Power-down input, active low

DIN

Digital Input

Data input for daisy-chain operation

DOUT

Digital Output

ADC data output, modulator output (modulator mode)

DRDY/FSYNC

Digital

Input/Output

If FORMAT = 0 (SPI), then pin 10 = DRDY output

If FORMAT = 1 (Frame-Sync), then pin 10 = FSYNC input

SCLK

Digital Input

Serial clock for ADC data retrieval, modulator clock output (modulator mode)

CLK

Digital Input

Master clock

DVDD

Digital Input

Digital supply

DGND

Digital Input

Digital ground

VREFN

Analog Input

Negative reference input

VREFP

Analog Input

Positive reference input

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