AD7823

–4–

REV. B

PIN FUNCTION DESCRIPTIONS

Pin No.

Mnemonic

Description

1

CONVST

Convert Start. Falling edge puts the track-and-hold into hold mode and initiates a conversion.

A rising edge on the

CONVST pin enables the serial port of the AD7823. This is useful in

multipackage applications where a number of devices share the same serial bus. The state of

this pin at the end of conversion also determines whether the part is powered down or not.

See Operating Modes section of this data sheet.

Positive input of the pseudo differential analog input.

Negative input of the pseudo differential analog input.

4

GND

Ground reference for analog and digital circuitry.

External reference is connected here.

Serial data is shifted out on this pin.

7

SCLK

Serial Clock. An external serial clock is applied here.

8V

DD

Positive Supply Voltage 2.7 V to 5.5 V.

PIN CONFIGURATION

DIP/SOIC/microSOIC

1

2

3

4

8

7

6

5

TOP VIEW

(Not to Scale)

AD7823

CONVST

GND

SCLK