ADT7410 Datasheet, PDF (1/24 Pages) Analog Devices – ±0.5°C Accurate, 16-Bit Digital I2C Temperature Sensor

±0.5°C Accurate, 16-Bit Digital
I²C Temperature Sensor
ADT7410
FEATURES
13- or 16-bit user selectable temperature-to-digital converter
Temperature accuracy: ±0.5°C from −40°C to +105°C
No temperature calibration/correction required by user
Power saving 1 sample per second (SPS) mode
Fast first conversion on power-up of 6 ms
I²C-compatible interface
Operating temperature: −55°C to +150°C
Operating voltage: 2.7 V to 5.5 V
Critical overtemperature indicator
Programmable overtemperature/undertemperature interrupt
Low power consumption: 700 μW typical at 3.3 V
Shutdown mode for lower power: 7 μW typical at 3.3 V
8-lead narrow SOIC RoHS-compliant package
APPLICATIONS
Medical equipment
Environmental control systems
Computer thermal monitoring
Thermal protection
Industrial process control
Power system monitors
Hand-held applications
GENERAL DESCRIPTION
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 temper-
ature 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 typi-
cally 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 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
VALUE
REGISTER
CONFIGURATION
REGISTER
T_CRIT
REGISTER
T_HIGH
REGISTER
T_LOW
REGISTER
T_HYST
REGISTER
A0 3
A1 4
FUNCTIONAL BLOCK DIAGRAM
V_DD
8
ADT7410
INTERNAL
OSCILLATOR
T_CRIT
INTERNAL
REFERENCE
TEMPERATURE
SENSOR
Σ-Δ
MODULATOR
T_HIGH
6 CT
5 INT
POINTER
REGISTER
FILTER
LOGIC
I²C INTERFACE
7
GND
Figure 1.
T_LOW
1 SCL
2 SDA
Rev. 0
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