SMBDAT

SMBCLK

Temperature

Sensor

Circuitry

Configuration

Register

Temperature

Register

Two-Wire

Serial Interface

2.7V to 5.5V

LM73

Manufacturer's

ID Register

Pointer

Register

and

Decode Logic

Set-Point

Comparator

ADDR

Control/Status

Register

11-Bit to 14-Bit

Delta-Sigma

A/D Converter

GND

ALERT

LM73

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SNIS141F – OCTOBER 2005 – REVISED OCTOBER 2015

7 Detailed Description

7.1 Overview

The LM73 is a digital temperature sensor that senses the temperature of its die using a sigma-delta analog-to-

digital converter and stores the temperature in the Temperature Register. The LM73's 2-wire serial interface is

The temperature resolution is programmable, allowing the host system to select the optimal configuration

between sensitivity and conversion time. The LM73 can be placed in shutdown to minimize power consumption

when temperature data is not required. While in shutdown, a 1-shot conversion mode allows system control of

the conversion rate for ultimate flexibility.

7.2 Functional Block Diagram

7.3 Feature Description

The LM73 features the following registers. See LM73 Registers for a complete list of the pointer address,

content, and reset state of each register.

•

Pointer Register

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9

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