Analog Devices Inc. AD637AR High Precision, Wide Bandwidth RMS-to-DC Converter

The AD637AR from Analog Devices Inc. is a sophisticated RMS-to-DC converter that combines precision, flexibility, and high bandwidth to meet a wide array of application requirements. This integrated circuit is designed to compute the true root-mean-square (RMS) value of complex waveforms, with a particular emphasis on performance and accuracy. The AD637AR is ideal for high-performance RMS measurements in a variety of fields, including telecommunications, audio processing, and industrial instrumentation.

At the heart of the AD637AR lies a laser-trimmed chipset that ensures high accuracy. It features a crest factor compensation scheme, enabling it to deliver consistent and reliable RMS calculations for waveform factors up to 3.0 without any external adjustments. The device is capable of measuring input signals with frequencies up to 8 MHz for a 200 mV full-scale input and up to 600 kHz for full-scale inputs up to 6 V, which makes it one of the most versatile RMS-to-DC converters on the market.

Designed with user convenience in mind, the AD637AR comes in a robust 16-pin SOIC package, making it suitable for standard PCB layouts. The device operates over a wide power supply range of ±5 V to ±15 V, providing flexibility in system design. It also features a dB output with a 60 dB range and an auxiliary dB output that is accessible via an external capacitor and scaling resistors, enabling the creation of log amps and power measurement devices.

The AD637AR also includes an auxiliary amplifier that can be configured as a buffer, an amplifier, or a precision rectifier. This feature allows designers to tailor the device to their specific application needs. Additionally, the AD637AR possesses a low power shutdown mode, significantly reducing power consumption when the device is not in active use.

With its combination of high accuracy, broad bandwidth, and versatile features, the Analog Devices Inc. AD637AR RMS-to-DC converter is a premier choice for engineers and designers looking to perform precise RMS measurements in their applications.