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AD421 - Loop-Powered 4 mA to 20 mA DAC

General Description

The AD421 is a complete, loop-powered, digital to 4 mA to 20 mA converter, designed to meet the needs of smart transmitter manufacturers in the Industrial Control industry.

It provides a high precision, fully integrated, low cost solution in a compact 16-lead package.

Key Features

  • 4 mA to 20 mA Current Output HART® Compatible 16-Bit Resolution and Monotonicity ؎0.01% Integral Nonlinearity 5 V or 3 V Regulator Output 2.5 V and 1.25 V Precision Reference 750 ␮A Quiescent Current max Programmable Alarm Current Capability Flexible High Speed Serial Interface 16-Lead SOIC and PDIP Packages DATA CLOCK LATCH REF IN (+2.5V) Loop-Powered 4 mA to 20 mA DAC AD421.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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a FEATURES 4 mA to 20 mA Current Output HART® Compatible 16-Bit Resolution and Monotonicity ؎0.01% Integral Nonlinearity 5 V or 3 V Regulator Output 2.5 V and 1.25 V Precision Reference 750 ␮A Quiescent Current max Programmable Alarm Current Capability Flexible High Speed Serial Interface 16-Lead SOIC and PDIP Packages DATA CLOCK LATCH REF IN (+2.5V) Loop-Powered 4 mA to 20 mA DAC AD421 FUNCTIONAL BLOCK DIAGRAM REF OUT1 REF OUT2 (+2.5V) (+1.25V) LV VCC 75k⍀ 112.