FEATURES

D DIGITAL OUTPUT: SPI-Compatible Interface

D RESOLUTION: 12-Bit + Sign, 0.0625°C

D ACCURACY:

±1.5°C from −25°C to +85°C (max)

D LOW QUIESCENT CURRENT: 50µA (max)

D WIDE SUPPLY RANGE: 2.7V to 5.5V

D TINY SOT23-6 PACKAGE

D OPERATION TO 150°C

APPLICATIONS

D POWER-SUPPLY TEMPERATURE

MONITORING

D COMPUTER PERIPHERAL THERMAL

PROTECTION

D NOTEBOOK COMPUTERS

D CELL PHONES

D BATTERY MANAGEMENT

D OFFICE MACHINES

DESCRIPTION

The TMP121 and TMP123 are SPI-compatible tempera-

ture sensors available in the tiny SOT23-6 package.

Requiring no external components, the TMP121 and

TMP123 are capable of measuring temperatures within

2

°C of accuracy over a temperature range of −40°C to

+125

°C. Low supply current, and a supply range from 2.7V

to 5.5V, make the TMP121 and TMP123 excellent

candidates for low-power applications.

The TMP121 and TMP123 are ideal for extended thermal

measurement in a variety of communication, computer,

consumer, environmental, industrial, and instrumentation

applications.

Diode

Temp.

Sensor

∆Σ

A/D

Converter

OSC

Control

Logic

Serial

Interface

Config.

and Temp.

Register

TMP121

Temperature

GND

NC

NC = No Connection(1)

1

2

3

6

5

4

V+

SO

CS

SCK

Diode

Temp.

Sensor

∆Σ

A/D

Converter

OSC

Control

Logic

Serial

Interface

Config.

and Temp.

Register

TMP123

NC

GND

NC = No Connection(1)

1

2

3

6

5

4

V+

SO

CS

SCK

Temperature

(1) Pins labeled NC should be left floating or connected to GND.

TMP121

TMP123

SBOS273C − JUNE 2003 − REVISED FEBRUARY 2005

1.5

°C Accurate Digital Temperature Sensor

with SPI

 Interface

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

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Copyright

 2003−2005, Texas Instruments Incorporated

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.

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