LTC1966IMS8#TR

Overview

The LTC1966IMS8#TR is a precision, micro-power true RMS-to-DC converter manufactured by Analog Devices Inc. It utilizes an innovative delta-sigma computational technique to achieve high accuracy and low power consumption. The device accepts single-ended or differential inputs with rail-to-rail common-mode voltage range and supports peak factors up to 4. It operates on a single supply of 2.7V to 5.5V or dual supplies up to ±5.5V. Key electrical parameters include a typical supply current of 155µA, maximum input offset voltage of 4mV at 5V, and a shutdown current of 0.1µA. The component is housed in an 8-MSOP package.

Feature Summary

• Employs patented delta-sigma computational technology for true RMS-to-DC conversion without requiring external diodes, heaters, or log-anti-log circuits.
• Offers superior linearity allowing for simple system calibration across any input voltage, independent of PCB soldering stress or operating temperature variations.
• Features flexible input and output configurations including rail-to-rail common-mode input range, independent output reference pin for level shifting, and support for both single-ended and differential signals.

Applications

• True RMS digital multimeters and panel meters
• AC+DC true RMS measurement systems
• Portable battery-powered instrumentation

Procurement Notes

Verify the specific suffix #TR indicates tape and reel packaging when ordering. Confirm the manufacturer part number matches exactly as the base product series may have multiple package options. Check for RoHS compliance status if required by your manufacturing standards. Ensure the source document explicitly lists this exact part number to avoid confusion with similar variants like the tube-packaged version.

Selection Notes

Select this component when high accuracy and low power are critical in RMS measurement applications. The delta-sigma architecture provides better linearity compared to traditional log-anti-log converters. Consider the 8-MSOP package size for space-constrained portable designs. Verify that the input signal characteristics align with the device's supported peak factor and common-mode range specifications.

Part Context

The LTC1966 belongs to Analog Devices' family of precision RMS-to-DC converters. It replaces older technologies that relied on thermal elements or logarithmic amplification. The device is designed for applications requiring precise AC signal magnitude determination. It integrates advanced computational techniques to simplify circuit design while maintaining high performance metrics.

Replacement Considerations

Direct substitute part numbers should be verified against official Analog Devices documentation. Cross-reference package type and suffix codes to ensure compatibility. No generic industry substitutes are confirmed without explicit manufacturer validation.