**The AD737JNZ: A Low Power, Precision True RMS-to-DC Converter**

In the realm of analog signal processing, accurately measuring the true energy content of complex waveforms is a fundamental challenge. While simple average-responding circuits suffice for pure sinusoidal signals, they fail dramatically when faced with the distorted, noisy, or irregular waveforms common in modern electronics. This is where the **AD737JNZ**, a high-performance, monolithic True RMS-to-DC converter from Analog Devices, establishes itself as an essential component for precision measurement.

The core function of the AD737JNZ is to compute the **true root mean square (RMS)** value of an input AC signal (with or without a DC offset) and provide an equivalent DC output voltage. The RMS value represents the effective value or heating value of a waveform, which is critical for determining real power, energy dissipation, and accurate amplitude measurements regardless of the wave shape. The device achieves this through an implicit computation method using a proprietary **log-antilog computational technique**, which is inherently more accurate and stable than simpler averaging methods followed by external correction.

A defining characteristic of the AD737JNZ is its remarkably **low power consumption**, typically drawing just 160 µA of supply current. This feature makes it exceptionally well-suited for portable, battery-powered test equipment, and energy-sensitive applications where minimizing power drain is paramount. Despite its low power operation, it does not sacrifice performance, offering impressive precision with a **maximum error of ±0.2 mV ± 0.3% of reading** for specified inputs.

The converter boasts a wide dynamic range, capable of handling input signals from 0 to 200 mV RMS for full-scale operation, with the ability to measure signals with crest factors up to 5 with minimal additional error. Its high input impedance and integrated input buffer amplifier simplify interface with preceding circuitry. Housed in a robust 8-pin plastic DIP or SOIC package, the AD737JNZ is designed for ease of use and integration into a wide array of systems, from multimeters and power monitors to audio leveling circuits and vibration analysis equipment.

**ICGOODFIND:** The AD737JNZ stands out as a premier solution for engineers seeking a reliable, low-power, and highly accurate method to convert complex AC waveforms into a stable and precise DC representation. Its blend of precision, efficiency, and robust performance ensures that measurements reflect the true power of a signal, making it an indispensable tool in any design requiring faithful RMS conversion.

**Keywords:** True RMS-to-DC Conversion, Low Power Consumption, Precision Measurement, High Input Impedance, Log-Antilog Computational Core