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LM91 Datasheet Diode Input Digital Temperature Sensor

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: 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.

Key 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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LM91 Distributor