MSSPSI datasheet(4/16 Pages) MSI

4 / 16 page

Smart Programmable Sensor Interface

Data Sheet

Pin Number

Pin Name

Description

DOUT

Data

Output

SOUT

Strobe Out

Denotes start of

conversion

COUT

Calibrator Output

Watchdog output

AF1

Alias Filter 1 Output

Drives >100kohms <12 pF

Positive Supply;

Typically 5.0 VDC

INAD

Input to A/D

OUTLP

Lowpass Filter Output

INLP

Lowpass Filter Input)

INHP

Highpass Filter Input

N/C

Do Not Connect

INEXT

External Input

BIAS

Bias Input

OFST

Offset Adjust Output

OPO

Op Amp Output

N/C

Test Only; Do not

connect

INN

Low Noise Op Amp

Negative Input

Pin Number

Pin Name

Description

INP

Low Noise Amp

Positive Input

SQO

Square Wave Output

Adjustable to 400 mVpp

255 frequency steps

VREFI

Voltage reference input

A 0.1

μF cap to AGND

is connected to this pin

VREF

Voltage Reference

Nominally 2.5 VDC

TEMP

Temperature Sensor Output

AGND

Analog Ground

Typically tied to 0 VDC

DGND

Digital Ground

Typically tied to 0 VDC

N/C

Do Not Connect

CLK

Master Clock

Data Strobe Input

SCK

Serial Data Clock

Serial Data

input

VIO

IO Interface

Voltage

Nominally 3.0 VDC

VDDW

Watchdog timer VDD

DVDD

DIGITAL POSITIVE

SUPPLY; Typically 5.0VDC.

0.1

μF capacitor to ground

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