AD5700/AD5700-1

Data Sheet

Rev. D | Page 8 of 24

Pin No.

Mnemonic

Description

19

AGND

Analog Circuitry Ground Reference Connection.

20

XTAL2

Connection for External 3.6864 MHz Crystal. Do not connect to this pin if using the internal RC oscillator

(AD5700-1 only) or an external clock source.

21

XTAL1

Connection for External 3.6864 MHz Crystal or External Clock Source Input. Tie this pin to ground if using the

internal RC oscillator (AD5700-1 only).

22

DGND

Digital Circuitry Ground Reference Connection. For typical operation, it is recommended to connect this pin to

AGND.

23

REF_EN

Reference Enable. A high state enables the internal 1.5 V reference and buffer. A low state disables the internal

reference and input buffer, and a buffered external 2.5 V reference source must be applied at REF. If REF_EN is

24

FILTER_SEL

Band-Pass Filter Select. A high state enables the internal filter and the HART signal should be applied to the

HART_IN pin. A low state disables the internal filter and an external band-pass filter must then be connected at

the ADC_IP input pin. In this case, the HART signal should be applied to the ADC_IP pin.

EPAD

EPAD

Exposed Pad. For typical operation, it is recommended to connect this pin to AGND.