AD420ARZ-32

The AD420ARZ-32 from Analog Devices is a complete digital-to-current loop output converter, engineered for the industrial control market. This single-chip solution provides high precision and a low cost, generating current loop signals in a compact 24-lead SOIC or PDIP package.

Key electrical specifications include 16-bit resolution and monotonicity, with a maximum integral nonlinearity of ±0.012% and a maximum total output error of ±0.15% (trimmable). The device supports flexible output current programming for 4 mA to 20 mA, 0 mA to 20 mA, or an overrange function of 0 mA to 24 mA. It features a flexible serial digital interface operating at 3.3 MBPS, on-chip loop fault detection, and an on-chip 5 V reference with a maximum temperature coefficient of 25 ppm/°C.

The maximum power supply range is 32 V, and the output loop compliance is 0 V to VCC - 2.75 V. Full-scale settling to 0.1% occurs within 3 ms. The AD420ARZ-32 can also provide a voltage output (0 V to 5 V, 0 V to 10 V, ±5 V, or ±10 V) with an external buffer amplifier. The FAULT DETECT pin signals open circuit conditions in the loop.

This component is suitable for applications requiring precise current loop signal generation in industrial automation, process control, and instrumentation systems. Its integrated features minimize external component count and simplify system design.