GENERAL DESCRIPTION

The AD420 is a complete digital to current loop output converter, designed to meet the needs of the industrial control market. It provides a high precision, fully integrated, low cost single-chip solution for generating current loop signals in a compact 24-lead SOIC or PDIP package.

FEATURES

4 mA–20 mA, 0 mA–20 mA or 0 mA–24 mA

current output

16-bit resolution and monotonicity

±0.012 max integral nonlinearity

±0.05 max offset (trimmable)

±0.15 max total output error (trimmable)

Flexible serial digital interface (3.3 MBPS)

On-Chip loop fault detection

On-chip 5 V reference (25 ppm/°C max)

Asynchronous CLEAR function

Maximum power supply range of 32 V

Output loop compliance of 0 V to VCC − 2.75 V

24-Lead SOIC and PDIP packages