1B22 - Analog Devices

1B22 Programmable/ Isolated Voltage-to-Current Converter

Programmable, Isolated Voltage-to-Current Converter 1B22 FUNCTIONAL BLOCK DIAGRAM IN1 IN2 4mA OFFSET S. NODE RESISTOR NETWORK REF 1B22 SIGNAL ISOLATION DEMODULATOR PROT OUT HI OUT LO MODULATOR SYNC +15V –15V A. COM POWER ISOLATION OSCILLATOR RECTIFIER/ LOOP SUPPLY P. COM VLOOP DESIGN FEATURES AND USER BENEFITS The 1B22 is an isolated voltage-to-curr.

Features

Internal Isolated Loop Supply Drives 1000 ⍀ Load Pin Programmable Inputs: 0 V to +5 V or 0 V to +10 V Pin Programmable Outputs: 4 to 20 mA or 0 to 20 mA High CMV Isolation: 1500 V RMS Normal-Mode Output Protection: 240 V RMS High Accuracy Low Offset Tempco: ؎300 nA/؇ C Low Gain Tempco: ؎ 50 ppm/؇ C Low Nonlinearity: ؎ 0.02% High CMR: 90 dB min Small Package: 1.0" ؋ 2.10" ؋ 0.35" Meets IEEE STD 472: CMV Transient Protection (SWC) APPLICATIONS Multichannel Process Control D/A Converter—Current Loop Interface Analog Transmitters and Controllers Remote Data Acquisition Systems GENERAL DESCRIPTION .