LTC2991IMS#TRPBF

Thermal Management Overview

The LTC2991IMS#TRPBF is an octal I2C voltage, current, and temperature monitor housed in a 16-lead MSOP package. It features eight selectable inputs (V1–V8) capable of single-ended or differential measurements for supply voltages, current sense resistors, or remote diode temperatures. The device includes an internal 10ppm/°C reference and an internal temperature sensor. It operates on a 3V to 5.5V supply with selectable I2C addresses.

Thermal Management Feature Summary

• Supports simultaneous monitoring of system temperatures, supply voltages, and currents via a standard I2C serial interface.
• Configurable inputs allow pairing for differential measurements of current sense resistors or remote temperature sensing transistors.
• Includes an internal high-precision voltage reference to minimize external supporting components and board area.
• Provides configurable functionality and selectable addresses for flexible integration into various data acquisition systems.

Thermal Management Applications

• Measuring four remote diode temperatures
• Supply voltage monitoring
• Current measurement using sense resistors
• Remote data acquisition

Thermal Management Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the IMS designation corresponds to the industrial temperature range (-40°C to 85°C). Ensure the I2C address pins are configured correctly for the target system bus topology. Cross-reference the manufacturer part number with official distributor catalogs to confirm availability and lead times.

Thermal Management Selection Notes

Select this component for applications requiring submillivolt voltage resolution and 1% current measurement accuracy. It is suitable for systems needing 1°C temperature accuracy or better. Consider the 16-lead MSOP package size for space-constrained designs. Verify that the I2C bus speed requirements (up to 400kHz) align with the system controller capabilities.

Thermal Management Part Context

The LTC2991 is part of Analog Devices' family of precision monitoring ICs designed for comprehensive system health management. It consolidates multiple sensing functions into a single device, reducing bill-of-materials complexity compared to discrete solutions. The device is intended for use in embedded systems, servers, and industrial equipment where reliable environmental and power monitoring is critical.

Thermal Management Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

Thermal Management FAQ

How does the LTC2991 handle series resistance errors in remote temperature measurements?

The device uses proprietary techniques to cancel error due to series resistance during remote diode temperature measurements, ensuring accurate readings even with non-zero lead resistance.

What is the maximum differential input voltage for current sensing?

The full-scale differential voltage range is ±312.5 mV, allowing for precise current measurements across low-value sense resistors.

Can the LTC2991 measure both voltage and temperature simultaneously?

Yes, the device can be configured to measure multiple parameters including supply voltages, currents, and temperatures, with data stored in separate registers accessible via I2C.