LTC1966MPMS8#TRM

Overview

The LTC1966MPMS8#TRM is a precision, micropower true RMS-to-DC converter utilizing patented delta-sigma computational technology. It operates on a single supply voltage ranging from 2.7V to 5.5V or dual supplies up to ±5.5V. The device features a constant bandwidth of 800kHz (-3dB) and 6kHz (±1%), unaffected by input voltage levels. Gain accuracy is specified at 0.1% between 50Hz and 1kHz, with total error limited to 0.25% in the same range. Linearity reaches 0.02%, enabling simplified system calibration. Supply current is 155µA typically, reducing to 0.5µA in shutdown mode. It accepts single-ended or differential inputs with rail-to-rail common-mode range.

Feature Summary

• Employs delta-sigma computational technique for high-accuracy RMS-to-DC conversion
• Supports single-ended or differential inputs with rail-to-rail common-mode voltage range
• Features independent output reference pin for flexible level shifting
• Includes low-power shutdown mode for extended battery life in portable applications

Applications

• True RMS digital multimeters
• Panel meters requiring AC+DC measurement
• Handheld measurement devices

Procurement Notes

Verify the specific suffix MPMS8 against official Analog Devices documentation to confirm military-grade qualification and tape-and-reel packaging details. Ensure the part number matches the exact temperature range and performance grade required for your design. Cross-reference the datasheet revision date to ensure compatibility with your schematic requirements. Confirm RoHS compliance status through the manufacturer's official channel before finalizing procurement.

Selection Notes

Select this component when high linearity and low power consumption are critical for RMS measurements. The delta-sigma architecture simplifies calibration compared to traditional log-antilog converters. Consider the 8-MSOP package for space-constrained designs. Verify that the input signal characteristics align with the supported peak factor and frequency range specifications provided in the technical data.

Part Context

The LTC1966 series represents a class of precision analog signal processing components designed for accurate power measurement. This specific variant integrates advanced computational techniques within a compact surface-mount package. It serves as a modern alternative to older logarithmic converter technologies, offering improved flexibility and reduced component count in signal conditioning circuits.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult Analog Devices application notes for potential legacy replacements or functional equivalents based on specific circuit requirements.