MAX6629_10 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – 12-Bit + Sign Digital Temperature Sensors with Serial Interface

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
V_CC
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
V_CC 3
4 SCK
SOT23
TDFN
V_CC 3
4 SCK
SOT23
TDFN
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or visit Maxim’s website at www.maxim-ic.com.