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 ac waveforms, including complex patterns such as those generated by switch mode power supplies and triacs. Its accuracy spans a wide range of input levels and temperatures. The AD8436 delivers instant true rms results for less cost than misleading peak, averaging, or digital solutions. On-board buffer amplifiers enable the widest range of options for any rms to dc converter available, regardless of cost. For minimal applications, only a single external averaging capacitor is required. The built in high impedance FET buffer provides an interface for external attenuators, frequency compensation, or driving low impedance loads.
- Delivers true rms or average rectified value of an ac waveform
- Fast settling at all input levels
- 100 μV rms to 3 V rms (8.5 V p-p) full-scale input range
- Wide bandwidth: 1 MHz for -3 dB (300 mV)
- Zero converter dc output offset
- No residual switching products
- Specified at 300 mV rms input
- Accurate conversion with crest factors up to 10
- High Z FET separately powered input buffer
- Precision dc output buffer
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