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MAX6629MTT

12-Bit + Sign Digital Temperature Sensors with Serial Interface

Maxim Integrated 

19-2047; Rev 4; 5/10

12-Bit + Sign Digital Temperature Sensors

with Serial Interface

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

Cellular

Hard Disk Drive

HVAC

Automotive

Industrial Control

Systems

SPI is a trademark of Motorola, Inc.

Typical Application Circuit

+3V TO +5.5V

0.1μF

VCC

MAX6629

MAX6630

MAX6631

MAX6632 SO

μC

CS

GND

SCK

Features

♦ Low Power Consumption

32µA typ (MAX6631/MAX6632)

200µA typ (MAX6629/MAX6630)

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

♦ Accuracy

±1°C (max) from 0°C to +70°C

♦ +150°C Extended Temperature Range

♦ SPI-Compatible Serial Interface

♦ +3.0V to +5.5V Supply Range

♦ 6-Pin TDFN and SOT23 Packages

♦ Lead-Free Version Available (TDFN Package)

Ordering Information

PART

TEMP RANGE

PIN-PACKAGE

MAX6629MTT+ -55°C to +125°C 6 TDFN-EP*

MAX6629MUT

-55°C to +125°C 6 SOT23-6

MAX6630MTT+ -55°C to +125°C 6 TDFN-EP*

MAX6630MUT

-55°C to +125°C 6 SOT23-6

MAX6631MTT+ -55°C to +125°C 6 TDFN-EP*

MAX6631MUT

-55°C to +125°C 6 SOT23-6

MAX6632MTT+ -55°C to +125°C 6 TDFN-EP*

MAX6632MUT

-55°C to +125°C 6 SOT23-6

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Pin Configurations

TOP VIEW

N.C. 1

6 SO

MAX6629

GND 2 MAX6631 5 CS

GND 1

6 SO

MAX6630

N.C. 2 MAX6632 5 CS

VCC 3

4 SCK

SOT23

TDFN

VCC 3

4 SCK

SOT23

TDFN

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

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