The LTC2990 measures ambient and remote temperature, plus voltage and current, so the measurements are easily combined. Temperature sensors can be diodes or transistor sensors—remote sensor diodes are available as substrate diodes in large microprocessors.
The LTC2990 is an integrated power and temperature monitoring system designed to measure ambient, remote diode temperatures, plus voltage and current. It addresses the challenge of monitoring high-power point sources of heat in modern electronic systems where simple chassis monitors are insufficient.
The device utilizes silicon diodes or transistors as temperature sensors, measuring the absolute temperature by taking the difference in voltage across the sensor at two different bias currents with a ratio of 10. This method yields a linear result proportional to Kelvin temperature, allowing for accurate monitoring over an operating range of -55°C to 150°C.
These components can be used as temperature sensors over an operating range of -55°C to 150°C.
The device provides +1°C accuracy with a 0.06°C resolution.