LTC1966MPMS8#TR

Overview

The LTC1966MPMS8#TR is a precision, micropower true RMS-to-DC converter manufactured by Analog Devices Inc. It utilizes an innovative patented 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 four. It operates on a single supply from 2.7V to 5.5V or dual supplies up to ±5.5V. Key electrical parameters include a typical supply current of 155µA and a shutdown current of 0.5µA. The gain accuracy is 0.1% from 50Hz to 1kHz, with total error of 0.25%. It features a constant bandwidth of 800kHz (-3dB) and 6kHz (±1%). The component is housed in an 8-lead MSOP package.

Feature Summary

• Employs patented delta-sigma computational technology for true RMS-to-DC conversion
• Provides high linearity allowing simple system calibration across input voltages
• Features flexible input options supporting both single-ended and differential signals
• Includes independent output reference pin for flexible level shifting

Applications

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

Procurement Notes

Verify the specific suffix MPMS8 against official Analog Devices documentation to confirm temperature grade and packaging details. Ensure compatibility with the required operating environment specifications. Cross-reference the manufacturer part number with authorized distributors to confirm current product status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component when precise RMS-to-DC conversion is required with minimal power consumption. The delta-sigma architecture offers superior linearity compared to traditional log-antilog converters. Consider the 8-MSOP package for space-constrained portable applications. Verify that the input signal characteristics align with the supported peak factor and voltage ranges specified in the datasheet.

Part Context

This part belongs to the LTC1966 family of precision micropower RMS-to-DC converters. The family is designed for applications requiring accurate AC+DC measurements. The MPMS8 variant indicates a specific military or extended temperature grade within the MSOP package lineup, distinguishing it from standard commercial variants like CMS8.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.