AD7652 datasheet(11/32 Pages) AD

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AD7612

Rev. 0 | Page 11 of 32

Pin No.

Mnemonic

Type1

Description

IN+

Analog Input. Referenced to IN−.

TEMP

Temperature Sensor Analog Output.

REFBUFIN

Reference Buffer Input. When using an external reference with the internal reference buffer (PDBUF =

low, PDREF = high), applying 2.5 V on this pin produces 5 V on the REF pin. See the Voltage Reference

Input section.

PDREF

Internal Reference Power-Down Input.

When low, the internal reference is enabled.

When high, the internal reference is powered down, and an external reference must be used.

PDBUF

Internal Reference Buffer Power-Down Input.

When low, the buffer is enabled (must be low when using internal reference).

When high, the buffer is powered-down.

1 AI = analog input; AI/O = bidirectional analog; AO = analog output; DI = digital input; DI/O = bidirectional digital; DO = digital output; P = power.

2 In serial configuration mode (SER/PAR = high, HW/SW = low), this input is programmed with the serial configuration register and this pin is a don’t care. See the

Hardware Configuration section and Software Configuration section.

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