?癈 Accurate, Micropower Digital
Temperature Sensor
ADT7302
Rev. B
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
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Fax: 781.461.3113    ?0052011 Analog Devices, Inc. All rights reserved.
FEATURES
13-bit temperature-to-digital converter
40癈 to +125癈 operating temperature range
?癈 accuracy
0.03125癈 temperature resolution
Shutdown current of 1 糀
Power dissipation of 0.631 mW at VDD = 3.3 V
SPI- and DSP-compatible serial interface
Shutdown mode
Space-saving SOT-23 and MSOP packages
Compatible with AD7814
APPLICATIONS
Medical equipment
Automotive
   Environmental controls
   Oil temperature
   Hydraulic systems
Cell phones
Hard disk drives
Personal computers
Electronic test equipment
Office equipment
Domestic appliances
Process control
FUNCTIONAL BLOCK DIAGRAM
SERIAL
BUS
INTERFACE
ADT7302
V
DD
SCLK
DIN
DOUT
GND
13-BIT
ANALOG/DIGITAL
CONVERTER
TEMPERATURE
VALUE
REGISTER
BAND GAP
TEMPERATURE
SENSOR
CS
Figure 1.
GENERAL DESCRIPTION
The ADT7302 is a complete temperature monitoring system
available in SOT-23 and MSOP packages. It contains a band gap
temperature sensor and a 13-bit ADC to monitor and digitize
the temperature reading to a resolution of 0.03125癈.
The ADT7302 has a flexible serial interface that allows easy
interfacing to most microcontrollers. The interface is compatible
with SPI? QSPI", and MICROWIRE" protocols as well as DSPs.
The part features a standby mode that is controlled via the serial
interface.
The ADT7302s wide supply voltage range, low supply current,
and SPI-compatible interface make it ideal for a variety of
applications, including PCs, office equipment, automotive, and
domestic appliances.
PRODUCT HIGHLIGHTS
1.    On-chip temperature sensor that allows an accurate
measurement of the ambient temperature. The measurable
temperature range is 40癈 to +125癈.
2.    Supply voltage of 2.7 V to 5.25 V.
3.    Space-saving 6-lead SOT-23 and 8-lead MSOP packages.
4.    Maximum temperature accuracy of ?癈.
5.    13-bit temperature reading to 0.03125癈 resolution.
6.    Shutdown mode that reduces the power consumption to
4.88 糤 with VDD = 3.3 V at 1 SPS.
7.    Compatible with AD7814.