GENERAL DESCRIPTION

The AD736 is a low power, precision, monolithic true rms-to dc converter. It is laser trimmed to provide a maximum error of ±0.3 mV ± 0.3 of reading with sine wave inputs. Furthermore, it maintains high accuracy while measuring a wide range of input waveforms, including variable duty-cycle pulses and triac (phase)-controlled sine waves. The low cost and small size of this converter make it suitable for upgrading the performance of non-rms precision rectifiers in many applications. Compared to these circuits, the AD736 offers higher accuracy at an equal or lower cost.

FEATURES

Converts an ac voltage waveform to a dc voltage and then

converts to the true rms, average rectified, or absolute value

200 mV rms full-scale input range (larger inputs with input

attenuator)

High input impedance: 1012 Ω

Low input bias current: 25 pA maximum

High accuracy: ±0.3 mV ± 0.3 of reading

RMS conversion with signal crest factors up to 5

Wide power supply range: +2.8 V, −3.2 V to ±16.5 V

Low power: 200 µA maximum supply current

Buffered voltage output

No external trims needed for specified accuracy

Related device: the AD737—features a power-down control

with standby current of only 25 μA; the dc output voltage

is negative and the output impedance is 8 kΩ

AD736KR-REEL属于集成电路（IC） > RMS 至 DC 转换器。亚德诺半导体技术有限公司制造生产的AD736KR-REELRMS 至 DC 转换器RMS 至 DC 转换器产品族中的产品可用于执行测量时变波形的数学功能，并返回一个与等效稳态 (DC) 值成比例的值，如果将其应用于电阻负载，则会产生相同的功率耗散。这些转换器通常用于交流电源相关应用中的测量，它们之间以及它们与用于类似终端的其他技术之间的区别在于输入为非正弦波形时所给出结果的准确性。