3V/5V的DAC支持智能电流回路

智能变送器，并解释他们的需要高分辨率低功率DAC 。

Maxim > App Notes > A/D and D/A CONVERSION/SAMPLING CIRCUITS
AMPLIFIER AND COMPARATOR CIRCUITS SIGNAL GENERATION CIRCUITS

Keywords: 4-20mA, current loop, current loops, DAC, ADC, current DAC, isolation, 2-wire, signal conditioning, Dec 29, 2000
low power, D/A, industrial control, EMI, transducers, current transmission, transmitter

APPLICATION NOTE 722
3V/5V DACs Support Intelligent Current Loop

Abstract: This application note explains 4-20mA current loops and intelligent transmitters and explains their
need for high-resolution low-power DACs.


An optimum power-supply chip is not the only critical choice to be made in designing a mixed 3V/5V
microprocessor-controlled system. Because more and more systems require low-power components capable of
low-voltage startup, state-of-the-art A/