Rainbow Electronics MAX6626 - Manual

General Description
The MAX6625/MAX6626 combine a temperature sensor,
a programmable overtemperature alarm, and an I
2 C™-
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 I
2 C-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
♦ 9-Bit Temperature-to-Digital Converter (MAX6625)
♦ 12-Bit Temperature-to-Digital Converter (MAX6626)
♦ 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)
♦ 133ms Conversion Time
♦ I 2 C-Compatible Serial Interface
♦ Up to Four Devices on a Single Bus
♦ Versatile Alarm Output with Programmable Trip
Temperature and Hysteresis
♦ Low-Power Shutdown Mode
♦ Space-Saving 6-Pin SOT23 Package
MAX6625/MAX6626
9-Bit/12-Bit Temperature Sensors with
I
2
C-Compatible Serial Interface in a SOT23
________________________________________________________________ Maxim Integrated Products 1
GND
OT SCL
1 6 V S
5 ADD
SDA
MAX6625
MAX6626
SOT23-6
TOP VIEW
2
3 4
Pin Configuration
4
6
V S
0.1 µF
1 MAX6625
MAX6626
3
SCL
TO I 2 C
MASTER
10k
(OMIT FOR MAX6625R
AND MAX6626R)
SDA
5 2
1k 1k
OT OUTPUT
Typical Operating Circuit
19-1841; Rev 2; 7/02
*For device options, see Selector Guide at end of data sheet.
Requires special solder temperature profile described in the
Absolute Maximum Ratings section.
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
M A X6 6 2 5 P M U T - T * -55 °C to +125°C 6 SOT23-6
MAX6625RMUT-T* -55 °C to +125°C 6 SOT23-6
M A X6 6 2 6 P M U T - T * -55 °C to +125°C 6 SOT23-6
MAX6626RMUT-T* -55 °C to +125°C 6 SOT23-6
I 2 C is a trademark of Philips Corp.
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.