
13-Bit, ±0.5°C Accurate, MicroPower Digital
Temperature Sensor in 6-Lead SOT-23
Preliminary Technical Data
ADT7301
Rev. PrI
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FEATURES
13-bit temperature-to-digital converter
40°C to +150°C operating temperature range
±0.5°C accuracy
0.03125°C temperature resolution
Shutdown current of 1 A
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
FUNCTIONAL BLOCK DIAGRAM
SERIAL
BUS
INTERFACE
02884-
0-
001
ADT7301
VDD
SCLK
DIN
DOUT
GND
13-BIT
ANALOG/DIGITAL
CONVERTER
TEMPERATURE
VALUE
REGISTER
BAND GAP
TEMPERATURE
SENSOR
CS
Figure 1. Functional Block Diagram
GENERAL DESCRIPTION
The ADT7301 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 ADT7301 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 ADT7301’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.
PRODUCT HIGHLIGHTS
1.
The ADT7301 has an on-chip temperature sensor that
allows an accurate measurement of the ambient tempera-
ture. The measurable temperature range is 40°C to
+150°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 ±0.5°C.
5.
13-bit temperature reading to 0.03125°C resolution.
6.
The ADT7301 features a shutdown mode that reduces the
power consumption to 4.88 W with VDD = 3.3 V @ 1 SPS.