13-Bit, ± ±0.5° Accurate, MicroPower Digital
Temperature Sensor in 6-Lead SOT-23
Preliminary Technical Data
ADT73±1
FEATURES
FUNCTIONAL BLOCK DIAGRAM
13-bit temperature-to-digital converter
−40°C to +150°C operating temperature range
0.5°C typical accuracy
BAND GAP
TEMPERATURE
SENSOR
13-BIT
ANALOG/DIGITAL
CONVERTER
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
GND
V
DD
TEMPERATURE
VALUE
REGISTER
ADT7301
CS
SERIAL
BUS
INTERFACE
SCLK
DIN
Space-saving SOT-23 and MSOP packages
DOUT
APPLICATIONS
Medical equipment
Automotive:
Figure 1. Functional Block Diagram
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 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.
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.
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. The
ADT7301 is rated for operation over the -40°C to +150°C
temperature range. It is not recommended to operate the device
at temperatures above +125°C for greater than a total of 5%
(5,000 hours) of the lifetime of the device. Any exposure
beyond this limit will affect device reliability.
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 µW with VDD = 3.3 V @ 1 SPS.
Rev. PrJ
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