AD637KR

Overview

The AD637KR is a high-precision, wideband RMS-to-DC converter manufactured by Analog Devices Inc. It computes the true root-mean-square value of complex waveforms with a maximum nonlinearity of 0.02% for inputs between 0 V and 2 V rms. The device features an 8 MHz bandwidth at 2 V rms input and supports additional computations including square, mean square, absolute value, and dB output over a 60 dB range. A chip select feature enables analog three-state operation and reduces quiescent current from 2.2 mA to 350 μA.

Feature Summary

• Computes true RMS values for arbitrary waveforms with high accuracy
• Supports multiple computation modes including square, mean square, absolute value, and logarithmic dB output
• Features chip select functionality for power-down and analog three-state isolation

Applications

• Precision AC voltage measurement systems
• Audio signal processing and analysis
• Vibration monitoring and instrumentation
• Power quality assessment equipment

Procurement Notes

Verify the specific suffix KR against official Analog Devices documentation to confirm package type and temperature rating. Ensure compatibility with system requirements regarding supply voltage and interface standards before procurement.

Selection Notes

Select this component when high bandwidth and low nonlinearity are critical for accurate RMS conversion. Consider the chip select feature if power management or bus isolation is required in the design architecture.

Part Context

The AD637 series represents a family of precision RMS-to-DC converters designed for applications requiring wide dynamic range and fast response times. This specific part integrates advanced circuitry to handle complex signals without external calibration components.

Replacement Considerations

Consult official substitution guides for equivalent performance. Verify pinout compatibility and electrical specifications against alternatives such as LTC1966 or LTC1968.