LM73

SMBDAT

SMBCLK

ADDR

1

5

6

4

Typical bypass 0.1 PF

3

2

To hardware

shutdown

To / from processor

2-wire interface

Address (set as desired for one

of three addresses)

ALERT

LM73

www.ti.com

SNIS141D – OCTOBER 2005 – REVISED MAY 2009

LM73 2.7V, SOT, 11-to-14 Bit Digital Temperature Sensor with 2-Wire Interface

Check for Samples: LM73

1

FEATURES

KEY SPECIFICATIONS

2

•

Single Address Pin Offers Choice of Three

•

Supply Voltage: 2.7V to 5.5V

Selectable Addresses per Version for a Total

•

Supply Current:

of Six Possible Addresses.

–

Operating:

•

–

320 µA (typ)

•

Supports 400 kHz Operation

–

495 µA (max)

•

Shutdown Mode with One-Shot Feature

–

Shutdown:

Available for Very Low Average Power

–

8 µA (max)

Consumption

–

1.9 µA (typ)

•

Programmable Digital Temperature Resolution

•

Temperature Accuracy:

from 11 Bits to 14 Bits.

–

-10°C to 80°C: ±1.0°C (max)

•

Fast Conversion Rate Ideal for Quick Power

Up and Measuring Rapidly Changing

–

-25°C to 115°C: ±1.5°C (max)

Temperature

–

-40°C to 150°C: ±2.0°C (max)

•

Open-Drain ALERT Output Pin Goes Active

•

Resolution: 0.25°C to 0.03125°C

When Temperature is Above a Programmed

•

Conversion Time:

Temperature Limit

–

11-bit (0.25°C): 14 ms (max)

•

Very Stable, Low-Noise Digital Output.

–

14-bit (0.03125°C): 112 ms (max)

•

UL Recognized Component

DESCRIPTION

APPLICATIONS

The LM73 is an integrated, digital-output temperature

•

Portable Electronics

sensor featuring an incremental Delta-Sigma ADC

with a two-wire interface that is compatible with the

•

Notebook Computers

•

Automotive

LM73 at any time to read temperature.

•

System Thermal Management

•

Office Electronics

Typical Application

1

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.