LTC2995IUD#TRPBF

Thermal Management Overview

The LTC2995IUD#TRPBF is a high-accuracy temperature sensor and dual voltage monitor featuring alert outputs. It converts the temperature of an external diode or its own die to an analog output voltage while rejecting errors due to noise and series resistance. Two supply voltages and the measured temperature are compared against upper and lower limits set with resistive dividers. If a threshold is exceeded, the device communicates an alert by pulling low the corresponding open drain logic output. The device provides ±1°C accurate temperature results using commonly available NPN or PNP transistors or temperature diodes built into modern digital devices. Voltages are monitored with 1.5% accuracy. A 1.8V reference output simplifies threshold programming and can be used as an ADC reference input.

Thermal Management Feature Summary

• Dual overvoltage/undervoltage supply monitoring with adjustable thresholds
• Single overtemperature/undertemperature remote temperature monitoring
• ±1°C remote temperature accuracy using standard transistors or diodes
• Open drain alert outputs for voltage and temperature conditions

Thermal Management Applications

• Network servers
• Core and I/O voltage monitors
• Desktop and notebook computers
• Environmental monitoring systems

Thermal Management Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing. Confirm the I grade corresponds to the -40°C to 85°C operating range required for your application environment. Ensure the 3mm x 3mm QFN package footprint matches your PCB layout constraints before finalizing procurement orders.

Thermal Management Selection Notes

Select this component when simultaneous monitoring of two distinct supply rails and one temperature point is required in a compact form factor. The internal series resistance cancellation feature makes it suitable for remote sensing applications where cable length introduces significant resistance. Verify that the required voltage thresholds fall within the programmable range defined by the 1.8V reference.

Thermal Management Part Context

This part belongs to the Analog Devices LTC2995 family of supervisory circuits. It integrates a precision temperature sensor with a dual voltage supervisor in a single 20-lead plastic QFN package. The IUD variant specifies the industrial temperature grade and the specific surface mount package type, distinguishing it from commercial or extended temperature variants.

Thermal Management Replacement Considerations

LTC2995CUD#TRPBF

Thermal Management FAQ

How does the LTC2995 handle series resistance in remote temperature sensing?

The device removes series resistance error by subtracting a cancellation voltage derived from an additional current measurement, allowing accurate measurements even with several hundred ohms of series resistance.

What determines the polarity of the temperature thresholds VT1 and VT2?

The Polarity Select (PS) pin configures the thresholds. Connecting PS to VCC sets VT1 as undertemperature and VT2 as overtemperature. Leaving PS unconnected configures both as overtemperature, while connecting PS to GND configures both as undertemperature.