Automotive, ± ±0.5° Aꢀꢀuꢁrte, ꢂ16-it
Digitrl SPI Tempeꢁrtuꢁe Sensoꢁ
Drtr Sheet
ADT73ꢂꢂ
FEATURES
GENERAL DESCRIPTION
Qualified for automotive applications
High performance
Temperature accuracy
0.ꢀ5C from −405C to +10ꢀ5C (2.7 V to 3.6 V)
0.45C from −405C to +10ꢀ5C (3.0 V)
16-bit temperature resolution: 0.00785C
Fast first conversion on power-up of 6 ms
Easy implementation
The ADT7311 is a high accuracy digital temperature sensor
in a narrow 8-lead SOIC package. It contains a band gap
temperature reference and a 16-bit ADC to monitor and digitize
the temperature to a 0.0078°C resolution. The ADC resolution,
by default, is set to 13 bits (0.0625°C). The ADC resolution is a
user programmable mode that can be changed through the
serial interface.
No temperature calibration/correction required by user
No linearity correction required
Low power
Power saving 1 sample per second (SPS) mode
700 μW typical at 3.3 V in normal mode
7 μW typical at 3.3 V in shutdown mode
Wide operating ranges
The ADT7311 is guaranteed to operate over supply voltages from
2.7 V to 5.5 V. Operating at 3.3 V, the average supply current is
typically 210 μA. The ADT7311 has a shutdown mode that
powers down the device and offers a shutdown current of
typically 2 μA. The ADT7311 is rated for operation over the
−40°C to +150°C temperature range.
The CT pin is an open-drain output that becomes active when
the temperature exceeds a programmable critical temperature
limit. The default critical temperature limit is 147°C. The INT
pin is also an open-drain output that becomes active when the
temperature exceeds a programmable limit. The INT and CT
pins can operate in either comparator or interrupt mode.
Temperature range: −405C to +1ꢀ05C
Voltage range: 2.7 V to ꢀ.ꢀ V
Programmable interrupts
Critical overtemperature interrupt
Overtemperature/undertemperature interrupt
SPI-compatible interface
8-lead narrow SOIC RoHS-compliant package
PRODUCT HIGHLIGHTS
APPLICATIONS
1. Ease of use, no calibration or correction required by the user.
2. Low power consumption.
Battery management
Climate control and infotainment
Lighting
Powertrain
3. Excellent long-term stability and reliability.
4. Packaged in an 8-lead SOIC, RoHS-compliant package.
Thermocouple cold junction compensation
GPS
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
SCLK
DOUT
ADT7311
INTERNAL
OSCILLATOR
INTERNAL
REFERENCE
DIN
CS
6
5
CT
T
T
T
CRIT
HIGH
LOW
Σ-∆
MODULATOR
TEMPERATURE
SENSOR
TEMPERATURE
VALUE
CONFIGURATION,
STATUS, AND
INT
REGISTER
ID REGISTERS
T
T
HYST
REGISTER
CRIT
REGISTER
FILTER
LOGIC
7
8
GND
T
T
HIGH
REGISTER
LOW
REGISTER
V
DD
Figure 1.
Rev. 0
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