General Description

The MAX6629–MAX6632 are local digital temperature

sensors with an SPI™-compatible serial interface. The

temperature is converted to a 12-bit + sign word with a

resolution of 0.0625°C/LSB. An extended temperature

range provides useful readings up to +150°C.

These sensors are 3-wire serial interface SPI compati-

ble, allowing the MAX6629–MAX6632 to be readily con-

nected to a variety of microcontrollers (µCs). The

MAX6629–MAX6632 are read-only devices, simplifying

their use in systems where only temperature data is

required.

All four digital temperature sensors require very little

supply current, making them ideal for portable systems.

The MAX6631/MAX6632 perform a temperature-to-digi-

tal conversion once every 8s and require minimal aver-

age supply current, 32µA (typ). The MAX6629/

MAX6630 perform a conversion once every 0.5s and

require only 200µA (typ) supply current. Any of these

temperature sensors can perform conversions more

often—up to approximately four conversions per sec-

ond by reading the conversion results more often.

Applications

Features

o Low Power Consumption

32µA typ (MAX6631/MAX6632)

200µA typ (MAX6629/MAX6630)

o 12-Bit + Sign Resolution with 0.0625°C/LSB

o Accuracy

±1°C (max) from 0°C to +70°C

±2.3°C (max) from -20°C to +100°C

±3.2°C (max) from -40°C to +125°C

±6.5°C (max) at +150°C

o +150°C Extended Temperature Range

o SPI-Compatible Serial Interface

o +3.0V to +5.5V Supply Range

o 6-Pin SOT23 Package

12-Bit + Sign Digital Temperature Sensors

with Serial Interface

________________________________________________________________ Maxim Integrated Products

1

GND

SCK

16

SO

5

N.C.

MAX6629

MAX6631

SOT23

TOP VIEW

2

34

CS

N.C.

SCK

16

SO

5

GND

MAX6630

MAX6632

SOT23

2

34

CS

Pin Configurations

19-2047; Rev 1; 7/01

Ordering Information

PART

TEMP. RANGE

PIN-

PACKAGE

TOP

MARK

MAX6629MUT-T

-55°C to +150°C

6 SOT23-6

AAPM

MAX6630MUT-T

-55°C to +150°C

6 SOT23-6

AAPN

MAX6631MUT-T

-55°C to +150°C

6 SOT23-6

AAPO

MAX6632MUT-T

-55°C to +150°C

6 SOT23-6

AAPP

SPI is a trademark of Motorola, Inc.

SO

GND

SCK

µC

+3V TO +5.5V

0.1

µF

MAX6629

MAX6630

MAX6631

MAX6632

CS

Typical Application Circuit

Cellular

Hard Disk Drive

HVAC

Automotive

Industrial Control

Systems

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.