AD737 RMS to DC Converter IC

AD737 RMS to DC Converter IC

The AD737 is a high-precision, low-power True RMS-to-DC converter IC designed by Analog Devices. It accurately measures the true root-mean-square (RMS) value of AC or complex input signals and provides a DC output voltage proportional to that RMS value.

Unlike average-responding converters, the AD737 delivers true RMS results, regardless of the input waveform — whether it’s sinusoidal, square, triangular, or highly distorted. This makes it ideal for precision AC voltage and current measurement, signal monitoring, and instrumentation applications.

The AD737 integrates a complete RMS-to-DC conversion system with low drift, low noise, and excellent temperature stability, all in a compact 8-pin DIP or SOIC package.

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Features:-

• Computes True rms value Average rectified value Absolute value
• Provides 200 mV full-scale input range (larger inputs with input scaling)
• Direct interfacing with 3½ digit CMOS analog-to-digital converters (ADCs)
• High input impedance: 1012 ?
• Low input bias current: 25 pA maximum
• High accuracy: ±0.2 mV ± 0.3% of reading RMS conversion with signal crest factors up to 5
• Wide power supply range: ±2.5 V to ±16.5 V
• Low power: 25 ?A (typical) standby current
• No external trims needed for specified accuracy
• The AD737 output is negative going

Specification:-

Applications:

• True RMS AC voltage and current measurement
• Portable and bench multimeters
• Power and energy meters
• Audio level measurement and analysis
• Industrial process control systems
• Battery and inverter monitoring
• RMS signal conditioning for data acquisition systems

*Product image for illustration purposes only, actual product may vary.