LTC2995CUD#TRPBF

Thermal Management Overview

The LTC2995CUD#TRPBF is a high-accuracy temperature sensor and dual voltage monitor featuring open-drain 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
• Voltage output proportional to absolute temperature
• Open drain alert outputs for temperature and voltage conditions

Thermal Management Applications

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

Thermal Management Procurement Notes

Verify the specific suffix TRPBF indicates tape and reel packaging when sourcing. Confirm the C grade corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure the QFN package dimensions match the design constraints. Check for lead-free finish compliance if required by assembly specifications.

Thermal Management Selection Notes

Select this component for applications requiring simultaneous monitoring of two supply rails and one temperature point. The internal reference simplifies threshold setting via resistor dividers. Consider the quiescent current and update time relative to system power and response requirements. Verify that the external diode sensor matches the factory calibration ideality factor for optimal accuracy.

Thermal Management Part Context

This part belongs to the Analog Devices LTC2995 family of supervisory circuits. It integrates a temperature sensor and dual voltage monitor in a compact 3mm x 3mm QFN package. The family includes variants with different temperature grades and packaging options to suit various industrial and commercial environments.

Thermal Management Replacement Considerations

LTC2995IUD#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 significant cable resistance.

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

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