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LM91 - Diode Input Digital Temperature Sensor

Datasheet Summary

Description

The LM91 is a remote diode temperature sensor, Delta-Sigma analog-to-digital converter, and digital over-temperature detector with an SMBus™ interface.

Features

  • n Directly senses die temperature of remote ICs n Senses temperature of remote diodes n SMBus compatible interface, supports SMBus Timeout n Register readback capability n 7 bit plus sign temperature data format n 2 address select lines enable 9 LM91s to be connected to a single bus Key Specifications j Supply Voltage j Supply Current j Local Temperature Accuracy j Remote Diode Temperature Accuracy +60˚C to +100˚C 0˚C to +125˚C 3.0V - 3.6V 1 mA (max) ±1.0˚C (typ) ±4˚C (max) ±6˚C (max) Appli.

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Datasheet Details

Part number LM91
Manufacturer National Semiconductor
File Size 155.99 KB
Description Diode Input Digital Temperature Sensor
Datasheet download datasheet LM91 Datasheet
Additional preview pages of the LM91 datasheet.

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Full PDF Text Transcription

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LM91 Diode Input Digital Temperature Sensor with Two-Wire Interface November 2001 LM91 Diode Input Digital Temperature Sensor with Two-Wire Interface General Description The LM91 is a remote diode temperature sensor, Delta-Sigma analog-to-digital converter, and digital over-temperature detector with an SMBus™ interface. The LM91 senses its own temperature as well as the temperature of a target IC with a diode junction, such as a Pentium® II processor or a diode connected 2N3904. A diode junction (semiconductor junction) is required on the target IC’s die. A host can query the LM91 at any time to read the temperature of this diode as well as the temperature state of the LM91 itself.
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