AD637SD屬于集成電路（IC）的RMS至DC轉(zhuǎn)換器。由亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD637SDRMS 至 DC 轉(zhuǎn)換器RMS 至 DC 轉(zhuǎn)換器產(chǎn)品族中的產(chǎn)品可用于執(zhí)行測量時變波形的數(shù)學(xué)功能，并返回一個與等效穩(wěn)態(tài) (DC) 值成比例的值，如果將其應(yīng)用于電阻負載，則會產(chǎn)生相同的功率耗散。這些轉(zhuǎn)換器通常用于交流電源相關(guān)應(yīng)用中的測量，它們之間以及它們與用于類似終端的其他技術(shù)之間的區(qū)別在于輸入為非正弦波形時所給出結(jié)果的準(zhǔn)確性。

GENERAL DESCRIPTION

The AD637 is a complete, high accuracy, rms-to-dc converter that computes the true rms value of any complex waveform. It offers performance that is unprecedented in integrated circuit rms-to-dc converters and comparable to discrete and modular techniques in accuracy, bandwidth, and dynamic range. The AD637 computes the true root mean square, mean square, or absolute value of any complex ac (or ac plus dc) input waveform and gives an equivalent dc output voltage. The true rms value of a waveform is more useful than an average rectified signal because it relates directly to the power of the signal. The rms value of a statistical signal relates to the standard deviation of the signal.

FEATURES

High accuracy

0.02 maximum nonlinearity, 0 V to 2 V rms input

0.1 additional error to crest factor of 3

Wide bandwidth

8 MHz at 2 V rms input

600 kHz at 100 mV rms

Computes

True rms

Square

Mean square

Absolute value

dB output (60 dB range)

Chip select/power-down feature allows

Analog three-state operation

Quiescent current reduction from 2.2 mA to 350 μA