±0.5°C Accurate, 16-Bit Digital
I2C Temperature Sensor
ADT7410
Data Sheet
FEATURES
GENERAL DESCRIPTION
High performance
Temperature accuracy
±0.5°C from −40°C to +105°C (2.7 V to 3.6 V)
±0.4°C from −40°C to +105°C (3.0 V)
16-bit temperature resolution: 0.0078°C
Fast first temperature conversion on power-up of 6 ms
Easy implementation
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
Temperature range: −55°C to +150°C
Voltage range: 2.7 V to 5.5 V
Programmable interrupts
Critical overtemperature interrupt
Overtemperature/undertemperature interrupt
I2C-compatible interface
8-lead narrow SOIC RoHS-compliant package
The ADT7410 is a high accuracy digital temperature sensor in a
narrow SOIC package. It contains a band gap temperature reference
and a 13-bit ADC to monitor and digitize the temperature to a
0.0625°C resolution. The ADC resolution, by default, is set to
13 bits (0.0625°C). This can be changed to 16 bits (0.0078°C) by
setting Bit 7 in the configuration register (Register Address 0x03).
The ADT7410 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 ADT7410 has a shutdown mode that powers
down the device and offers a shutdown current of typically 2 μA.
The ADT7410 is rated for operation over the −55°C to +150°C
temperature range.
Pin A0 and Pin A1 are available for address selection, giving the
ADT7410 four possible I2C addresses. The CT pin is an opendrain 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.
APPLICATIONS
Medical equipment
Environmental control systems
Computer thermal monitoring
Thermal protection
Industrial process control
Power system monitors
Hand-held applications
FUNCTIONAL BLOCK DIAGRAM
VDD
8
TEMPERATURE
VALUE
REGISTER
ADT7410
INTERNAL
OSCILLATOR
TCRIT
REGISTER
THIGH
REGISTER
6
CT
5
INT
1
SCL
2
CONFIGURATION
REGISTER
SDA
TCRIT
INTERNAL
REFERENCE
Σ-Δ
MODULATOR
TEMPERATURE
SENSOR
THIGH
TLOW
REGISTER
A0
3
A1
POINTER
REGISTER
FILTER
LOGIC
4
I2C INTERFACE
7
GND
TLOW
06560-001
THYST
REGISTER
Figure 1.
Rev. C
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