ADT7302_05 Datasheet, PDF (1/16 Pages) Analog Devices – ±2 C Accurate, Micropower Digital Temperature Sensor

±2°C Accurate, Micropower Digital
Temperature Sensor
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
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
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 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 ADT7302’s 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.
FUNCTIONAL BLOCK DIAGRAM
BAND GAP
TEMPERATURE
SENSOR
13-BIT
ANALOG/DIGITAL
CONVERTER
GND
V_DD
ADT7302
TEMPERATURE
VALUE
REGISTER
SERIAL
BUS
INTERFACE
CS
SCLK
DIN
DOUT
Figure 1.
PRODUCT HIGHLIGHTS
1. On-chip temperature sensor that allows an accurate
measurement of the ambient temperature. The measurable
temperature range is −40°C to +125°C.
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 ±2°C.
5. 13-bit temperature reading to 0.03125°C resolution.
6. Shutdown mode that reduces the power consumption to
4.88 μW with VDD = 3.3 V at 1 SPS.
7. Compatible with AD7814.
Rev. 0
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