19-2121; Rev 0; 7/01
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
General Description
The MAX6662 is a 12-bit + sign temperature sensor
combined with a programmable overtemperature alarm
and a 3-wire (SPI鈩?compatible) serial interface in a sin-
gle package. It converts its die temperature into digital
values using an internal analog-to-digital converter
(ADC). The temperature data is stored in a temperature
register as a 13-bit word, which allows 0.0625擄C resolu-
tion. The temperature data is readable at any time
through the serial interface. The operating temperature
range is -55擄C to +150擄C.
The MAX6662 provides two programmable watchdog
interrupt outputs.
ALERT
is used for lower temperature
warning functions, while
OT
is used for higher tempera-
ture-critical functions, such as power-supply shutdown.
The MAX6662 features a shutdown mode that saves
power by disabling everything except the serial inter-
face. The temperature sensor is available in an 8-pin SO
package.
o
12-Bit + Sign, 0.0625擄C Resolution
o
Accuracy
鹵1擄C max (+30擄C to +50擄C)
鹵1.6擄C max (0擄C to +70擄C)
鹵2.5擄C max (-20擄C to +85擄C)
鹵2.5 typ (+150擄C)
o
Extended Temperature Measurement Range
-55擄C to +150擄C
o
Low Average Supply Current, 125碌A(chǔ) (typ)
o
Shutdown Mode to Minimize Power Consumption
in Portable Applications
o
Two Programmable Temperature Fault Outputs
o
Switchable Fault Queue to Eliminate False
Tripping in Noisy Environments
Features
MAX6662
Applications
HVAC
Refrigeration
Automotive
Test Equipment
PART
MAX6662MSA
Ordering Information
TEMP. RANGE
-55擄C to +150擄C
PIN-PACKAGE
8 SO
Typical Operating Circuit
V
CC
= +3V TO +5.5V
Pin Configuration
TOP VIEW
0.1碌F
10k鈩?/div>
V
CC
OT
HEAT
SOURCES
MAX6662
ALERT
SIO
SCLK
CS
10k鈩?/div>
SCLK
CS
SIO
1
2
8
7
V
CC
NC
ALERT
OT
MAX6662
3
6
5
SYSTEM
CONTROLLER
GND
4
SO
SPI is a trademark of Motorola, Inc.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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