GENERAL DESCRIPTION

The 1B21 is an isolated voltage-to-current converter that incorporates a unique circuit design utilizing transformer-based isolation and automated surface-mount manufacturing technology. It provides an unbeatable combination of versatility and performance in a compact plastic package. Designed for industrial applications, it is especially suited for harsh environments with extremely high common-mode interference.

FEATURES

Wide input range: 0 V to 1 V up to 0 V to 10 V

High CMV isolation: 1500 V rms

Programmable output ranges: 4mA to 20mA

0 to 20 mA

Load resistance range: 0 to 1.35 kΩ maximum

High accuracy

Low offset tempco: ±300 nA/°C

Low gain tempco: ±50 ppm/°C

Low nonlinearity: ±0.02

High CMR: 90 dB minimum

Small package: 0.7” × 2.1” × 0.35”

Meets IEEE Standard 472: transient protection (SWC)

APPLICATIONS

Multichannel process control

DAC—current loop interface

Analog transmitters and controllers

Remote data acquisition systems