ADT7302 Datasheet, PDF (1/14 Pages) Analog Devices – ±2°C Accurate, MicroPower Digital Temperature Sensor in 6-Lead SOT-23

Preliminary Technical Data
±2°C Accurate, MicroPower Digital
Temperature Sensor in 6-Lead SOT-23
ADT7302
FEATURES
13-bit temperature-to-digital converter
−40°C to +125°C operating temperature range
±2°C accuracy
0.03125°C temperature resolution
Shutdown current of 1 µA
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
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
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°C.
The ADT7302 has a flexible serial interface that allows easy
interfacing to most microcontrollers. The interface is compat-
ible with SPI®, QSPI™, and MICROWIRE™ protocols as well as
DSPs. The part features a standby mode that is controlled via
the serial interface.
The ADT7302’s wide supply voltage range, low supply current,
and SPI compatible interface make it ideal for a variety of
applications, including personal computers, office equipment,
automotive, and domestic appliances.
FUNCTIONAL BLOCK DIAGRAM
BAND GAP
TEMPERATURE
SENSOR
13-BIT
ANALOG/DIGITAL
CONVERTER
GND
V_DD
TEMPERATURE
ADT7302
VALUE
REGISTER
SERIAL
BUS
INTERFACE
CS
SCLK
DIN
DOUT
Figure 1. Functional Block Diagram
PRODUCT HIGHLIGHTS
1. The ADT7302 has an on-chip temperature sensor that
allows an accurate measurement of the ambient tempera-
ture. The measurable temperature range is −40°C to
+125°C.
2. Supply voltage of 2.7 V to 5.5 V.
3. Space-saving 6-lead SOT-23 and 8-lead MSOP packages.
4. Temperature accuracy of ±2°C.
5. 13-bit temperature reading to 0.03125°C resolution.
6. The ADT7302 features a shutdown mode that reduces the
power consumption to 4.88 µW with VDD = 3.3 V @ 1 SPS.
Rev. PrE
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