Analog Devices Inc. AD8436ARQZ

Description
The AD8436 is a low-cost, low-power, true RMS-to-DC converter that delivers precise DC equivalents of AC waveforms. It features a wide dynamic input range (100 μV rms to 3V rms), high accuracy (±10 μV ± 0.25% of reading), and a wide bandwidth (1 MHz for -3 dB at 300 mV). The AD8436 is also highly versatile, with on-board buffer amplifiers that enable a variety of configurations.

Features
Delivers true RMS or average rectified value of AC waveform
Fast settling at all input levels
Accuracy: ±10 μV ± 0.25% of reading (B grade)
Wide dynamic input range (100 μV rms to 3V rms)
Larger inputs with external scaling
Wide bandwidth:
1 MHz for -3 dB (300 mV)
65 kHz for additional 1% error
Zero converter DC output offset
No residual switching products
Specified at 300 mV rms input
Accurate conversion with crest factors up to 10
Low power: 300 μA typical at ±2.4 V
High-Z FET separately powered input buffer
RIN ≥ 10¹¹ Ω, CIN ≤ 2 pF
Precision DC output buffer
Wide power supply voltage range
Dual: ±2.4 V to ±18 V
Single: 4.8 V to 36 V
4 mm x 4 mm LFCSP and 8 mm x 6 mm QSOP packages
ESD protected

Applications
True RMS measurement
Average rectified measurement
Power measurement
Crest factor measurement
AC waveform analysis
Battery-powered applications
Portable multi-meters
Industrial instrumentation
Automotive electronics