ADI AD8436高精度RMS到DC转换解决方案

ADI公司的AD8436是新一代跨导线性的高精度低功耗真正的RMS/DC转换器，它能精确计算交流波形的rms值，包括由开关电源和TRIAC所产品的复数项。精度优于0.5%，输出失调小于10uV，波峰因素（CF=1-10）时的误差小于0.5%,输入范围满刻度为100 μV rms 到3 V rms (8.5 V p-p)，双电源电压为 ±2.4 V到±18 V ，单电源电压为4.8 V 到36 V，主要用在遥控，手持仪表，板空间受限和户外环境的电源和汽车。本文介绍了AD8436主要特性，功能方框图，RMS核方框图，波峰因素测试电路图，典型应用电路以及AD8436-EVALZ评估板电路图和PCB布局图。

The AD8436 is a new generation, translinear precision, low power, true rms-to-dc converter that is loaded with options. It computes a precise dc equivalent of the rms value of ac waveforms, including complex patterns such as those generated by switchmode power supplies and triacs. Its accuracy spans a wide range of input levels and temperatures. The ensured accuracy of ≤±0.5% and ≤10 μV output offset result from the latest Analog Devices, Inc., technology. The crest factor error is <0.5% for CF values between 1 and 10.

The AD8436 delivers instant true rms results at less cost than misleading peak, averaging, or digital solutions. There is no programming expense or processor overhead to consider, and the 4 mm × 4 mm package easily fits into those tight applications.
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