Rainbow Electronics MAX6662 - Manual

General Description
The MAX6662 is a 12-bit + sign temperature sensor
combined with a programmable overtemperature alarm
and a 3-wire (SPI™-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°C resolu-
tion. The temperature data is readable at any time
through the serial interface. The operating temperature
range is -55°C to +150°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.
Applications
HVAC
Refrigeration
Automotive
Test Equipment
Features
♦ 12-Bit + Sign, 0.0625°C Resolution
♦ Accuracy
±1°C max (+30°C to +50°C)
±1.6°C max (0°C to +70°C)
±2.5°C max (-20°C to +85°C)
±2.5 typ (+150°C)
♦ Extended Temperature Measurement Range
-55°C to +150°C
♦ Low Average Supply Current, 125µA (typ)
♦ Shutdown Mode to Minimize Power Consumption
in Portable Applications
♦ Two Programmable Temperature Fault Outputs
♦ Switchable Fault Queue to Eliminate False
Tripping in Noisy Environments
MAX6662
12-Bit + Sign Temperature Sensor with
SPI-Compatible Serial Interface
________________________________________________________________ Maxim Integrated Products 1
ALERT
OT GND
1
2
8
7
V CC
NC CS
SIO
SCLK
SO
TOP VIEW
3
4
6
5
MAX6662
Pin Configuration
Ordering Information
10k Ω 10k Ω
0.1 µF
V
CC
OT
ALERT
SIO
SCLK
CS
SYSTEM
CONTROLLER
V CC = +3V TO +5.5V
HEAT
SOURCES
MAX6662
Typical Operating Circuit
19-2121; Rev 0; 7/01
PART TEMP. RANGE PIN-PACKAGE
MAX6662MSA -55 °C to +150°C 8 SO
SPI is a trademark of Motorola, Inc.
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.