The AD637AQZ is a high-accuracy, wide bandwidth, true RMS-to-DC converter from Analog Devices. It computes the true RMS value of any complex waveform, including AC plus DC. It is designed for applications requiring precise measurement of AC signals, regardless of waveform shape.

Applications

• AC Voltmeter Design
• Audio Level Measurement
• Power Measurement
• Waveform Analysis
• Process Control

Features

• True RMS Measurement: Measures the true RMS value of any waveform.
• High Accuracy: Provides high accuracy over a wide range of input signals.
• Wide Bandwidth: Operates over a broad frequency range.
• Low Power Consumption: Minimizes system power requirements.
• On-Chip Buffer Amplifier: Simplifies interfacing with external circuitry.
• Adjustable Crest Factor: Allows for optimizing performance for different waveforms.

Benefits

• Accurate AC Signal Measurement: Provides precise measurement of AC signals, regardless of waveform shape.
• Versatile Application: Suitable for a wide range of AC measurement applications.
• Simplified System Design: On-chip buffer amplifier simplifies system design.
• Extended Battery Life: Low power consumption extends battery life in portable applications.
• Optimized Performance: Adjustable crest factor allows for optimizing performance for different waveform characteristics.

Additional Details

The AD637AQZ uses an implicit averaging technique to compute the true RMS value. It provides a DC output voltage that is proportional to the RMS value of the input signal. It operates from a dual power supply (typically ±5V to ±15V). The device has excellent linearity and stability over temperature. The bandwidth is dependent on the external capacitor used for averaging. The crest factor is adjustable by selecting appropriate external components. It's a complete RMS-to-DC converter requiring only a few external components. The package type is a hermetically sealed ceramic DIP. This is a high-performance, high-accuracy solution for applications requiring true RMS measurement.