Product Details
●The ADT7420 is a high accuracy digital temperature sensor offering breakthrough performance over a wide industrial range, housed in a 4 mm × 4 mm LFCSP package. It contains an internal band gap reference, a temperature sensor, and a 16-bit ADC to monitor and digitize the temperature to 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.
●The ADT7420 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 ADT7420 has a shutdown mode that powers down the device and offers a shutdown current of typically 2.0 μA at 3.3 V. The ADT7420 is rated for operation over the −40°C to +150°C temperature range.
●Pin A0 and Pin A1 are available for address selection, giving the ADT7420 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 INT pin is also an open-drain output that becomes active when the temperature exceeds a programmable limit. The INT pin and CT pin can operate in comparator and interrupt event modes.
●Product Highlights
● 1. Ease of use, no calibration or correction required by the user.
● 2. Low power consumption.
● 3. Excellent long-term stability and reliability.
● 4. High accuracy for industrial, instrumentation, and medical applications.
● 5. Packaged in a 16-lead, 4 mm × 4 mm LFCSP RoHS-compliant package.
●Applications
● RTD and thermistor replacement
● Thermocouple cold junction compensation
● Medical equipment
● Industrial control and test
● Food transportation and storage
● Environmental monitoring and HVAC
● Laser diode temperature control
●### Features and Benefits
● High performance
● Temperature accuracy
● ±0.20°C from −10°C to +85°C at 3.0 V
● ±0.25°C from −20°C to +105°C from 2.7 V to 3.3 V
● 16-bit resolution: 0.0078°C
● Ultralow temperature drift: 0.0073°C
● NIST traceable or equivalent
● 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: −40°C to +150°C
● Voltage range: 2.7 V to 5.5 V
● Programmable interrupts
● Critical overtemperature interrupt
● Overtemperature/undertemperature interrupt
● I2C-compatible interface
● 16-lead, 4 mm × 4 mm LFCSP RoHS-compliant package
