应用功能： Loop-Powered4 mA to 20 mA DAC The AD421 is a complete, loop-powered, digital to 4 mA to20 mA converter, designed to meet the needs of smart transmittermanufacturers in the Industrial Control industry. It providesa high precision, fully integrated, low cost solution in acompact 16-lead package. The AD421 is ideal for extending the resolution of smart 4 mA to 20 mA transmitters at very low cost.
