Temperature

Sensor

Circuitry

Control

Logic

Temperature

Register

Manufacturer's

ID Register

Three-Wire

Serial Interface

14-Bit

Delta-Sigma

A/D Converter

SI/O

SC

2.65V to 5.5V

LM71

CS

LM71, LM71-Q1

www.ti.com

SNIS125D – MARCH 2004 – REVISED MARCH 2013

LM71/LM71-Q1 SPI/MICROWIRE 13-Bit Plus Sign Temperature Sensor

Check for Samples: LM71, LM71-Q1

1

FEATURES

•

Temperature Accuracy

–

−10°C to +65°C: ±1.5°C (max)

2

•

LM71Q is AEC-Q100 Grade 0 Qualified and is

Manufactured on an Automotive Grade Flow

–

−40°C to 150°C: +3/− 2°C (max)

•

5-Pin SOT-23 Package or 6-Pin No-Pull-Back

•

Temperature Resolution: 31.25 m°C

WSON Package

DESCRIPTION

•

Operates Over a Full

−40°C to +150°C Range

The LM71 is a low-power, high-resolution digital

•

SPI and MICROWIRE Bus Interface

temperature sensor with an SPI and MICROWIRE

compatible interface, available in the 5-pin SOT-23 or

APPLICATIONS

the 6-pin WSON (no pull back) package. The host

•

System Thermal Management

can query the LM71 at any time to read temperature.

Its low operating current is useful in systems where

•

Personal Computers

low power consumption is critical.

•

Portable Electronic Devices

The LM71 has 13-bit plus sign temperature resolution

•

Disk Drives

(0.03125°C

per

LSB)

while

operating

over

a

•

Office Electronics

temperature range of

−40°C to +150°C.

•

Electronic Test Equipment

The LM71’s 2.65V to 5.5V supply voltage range, fast

•

Vending Machines

conversion rate, low supply current, and simple SPI

•

Automotive

interface

make

it

ideal

for

a

wide

range

of

applications. The LM71Q is available in the 5-lead

SOT-23 package only.

KEY SPECIFICATIONS

•

Supply Voltage: 2.65V to 5.5V

•

Supply Current

–

Operating: 300 µA (typ)

–

550 µA (max)

Simplified Block Diagram

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

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

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004–2013, 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.