MAX6626 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – 9-Bit/12-Bit Temperature Sensors with I2C-Compatible Serial Interface in a SOT23

19-1841; Rev 2; 7/02
9-Bit/12-Bit Temperature Sensors with
I²C-Compatible Serial Interface in a SOT23
General Description
The MAX6625/MAX6626 combine a temperature sensor,
a programmable overtemperature alarm, and an I²C™-
compatible serial interface into single compact packages.
They convert their die temperatures into digital values
using internal analog-to-digital converters (ADCs). The
result of the conversion is held in a temperature register,
readable at any time through the serial interface. A dedi-
cated alarm output, OT, activates if the conversion result
exceeds the value programmed in the high-temperature
register. A programmable fault queue sets the number of
faults that must occur before the alarm activates, prevent-
ing spurious alarms in noisy environments. OT has pro-
grammable output polarity and operating modes.
The MAX6625/MAX6626 feature a shutdown mode that
saves power by turning off everything but the power-on
reset and the I²C-compatible interface. Four separate
addresses can be configured with the ADD pin, allowing
up to four MAX6625/MAX6626 devices to be placed on
the same bus. The MAX6625P/MAX6626P OT outputs are
open drain, and the MAX6625R/MAX6626R OT outputs
include internal pullup resistors.
The MAX6625 has a 9-bit internal ADC and can function
as a replacement for the LM75 in most applications. The
MAX6626 has a 12-bit internal ADC. Both devices come
in the space-saving 6-pin SOT23 package.
Applications
Fan Control
Temperature Alarms
System Temperature Control
Industrial Equipment
Features
o 9-Bit Temperature-to-Digital Converter (MAX6625)
o 12-Bit Temperature-to-Digital Converter (MAX6626)
o Accuracy
±1°C (T_A = +25°C)
±1.5°C (0°C to +50°C)
±2°C (0°C to +70°C)
±3°C (-40°C to +85°C)
±4°C (-55°C to +125°C)
o 133ms Conversion Time
o I²C-Compatible Serial Interface
o Up to Four Devices on a Single Bus
o Versatile Alarm Output with Programmable Trip
Temperature and Hysteresis
o Low-Power Shutdown Mode
o Space-Saving 6-Pin SOT23 Package
Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX6625PMUT-T* -55°C to +125°C 6 SOT23-6
MAX6625RMUT-T*
M A X6 6 2 6 P M U T - T *
-55°C to +125°C
-55°C to +125°C
6 SOT23-6
6 SOT23-6
MAX6626RMUT-T*
-55°C to +125°C 6 SOT23-6
*For device options, see Selector Guide at end of data sheet.
Requires special solder temperature profile described in the
Absolute Maximum Ratings section.
Typical Operating Circuit
0.1µF
V_S
1k 1k
6
4
MAX6625 1
MAX6626
3
10k
(OMIT FOR MAX6625R
AND MAX6626R)
OT OUTPUT
SDA
TO I²C
SCL ^MASTER
5
2
TOP VIEW
Pin Configuration
SDA 1
6 V_S
MAX6625
GND 2 _MAX6626 5 ADD
SCL 3
4 OT
SOT23-6
I²C is a trademark of Philips Corp.
________________________________________________________________ Maxim Integrated Products 1
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