LTC1968CMS8#TRPBF

Overview

The LTC1968CMS8#TRPBF is a true RMS-to-DC converter utilizing delta-sigma computational technology. It operates on a single power supply ranging from 4.5V to 5.5V with a typical supply current of 2.3mA. The device supports differential or single-ended inputs, accommodating crest factors up to 4 and offering rail-to-rail common mode input range. It features high linearity of 0.02% and bandwidths of 500kHz for 1% gain error and 150kHz for 0.1% gain error. A low-power shutdown mode reduces current to 0.1μA. The component is housed in an 8-MSOP package.

Feature Summary

• Employs delta-sigma computational technique for superior linearity and accuracy compared to conventional log-antilog converters
• Supports flexible input configurations including single-ended or differential signals with rail-to-rail common mode range
• Provides rail-to-rail output capability with a separate reference pin for level shifting
• Features ultralow shutdown current consumption for battery-operated applications

Applications

• Portable instrumentation systems requiring precise signal measurement
• Battery-powered devices necessitating low power consumption modes
• Data acquisition systems utilizing single-supply operation
• Signal conditioning circuits handling wide dynamic range inputs

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the manufacturer designation remains Analog Devices Inc. for this part number. Ensure compatibility with standard MSOP footprint requirements during PCB layout planning. Cross-reference datasheet revisions for any potential design changes affecting performance specifications.

Selection Notes

Select this component when high linearity and amplitude-independent bandwidth are critical for RMS measurements. Consider the 8-MSOP package size constraints for portable designs. Evaluate the need for shutdown functionality if power conservation is required. Verify that the single-supply voltage range aligns with the system power architecture.

Part Context

This device belongs to the LTC1968 family of precision RMS-to-DC converters manufactured by Analog Devices Inc. It shares architectural similarities with other members like the LTC1966 but offers distinct performance characteristics regarding bandwidth and supply current. The CMS8 variant specifically denotes the commercial temperature range and MSOP package configuration within the product line.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.