AD420ANZ-32

The AD420ANZ-32 is a Serial Input 16-bit DAC designed to meet the needs of the industrial control market. It provides a high precision, fully integrated, single-chip solution for generating current loop signals. The output current range can be programmed to 4 to 20mA, 0 to 20mA or an over range function of 0 to 24mA. The AD420 can alternatively provide a voltage output from a separate pin that can be configured to provide 0-5V, 0-10V, ±5V or ±10V with the addition of a single external buffer amplifier. The 3.3Mbaud serial input logic design minimizes the cost of galvanic isolation and allows for simple connection to commonly used microprocessors. It can be used in 3-wire or asynchronous mode and a serial-out pin is provided to allow daisy chaining of multiple DACs on the current loop side of the isolation barrier. It uses Sigma-Delta (?-Δ) DAC technology to achieve 16-bit monotonicity at very low cost. Full-scale settling to 0.1% occurs within 3ms.