Catalog
±0.25°C Accurate, 16-Bit Digital I2C Temperature Sensor
Key Features
• High performanceTemperature 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 V16-bit resolution: 0.0078°C
• 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
• ±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°CNIST traceable or equivalentFast first temperature conversion on power-up of 6 ms
• NIST traceable or equivalent
• Fast first temperature conversion on power-up of 6 ms
• Easy implementationNo temperature calibration/correction required by userNo linearity correction required
• No temperature calibration/correction required by user
• No linearity correction required
• Low powerPower-saving 1 sample per second (SPS) mode700 µW typical at 3.3 V in normal mode7 µW typical at 3.3 V in shutdown mode
• 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 rangesTemperature range: −40°C to +150°CVoltage range: 2.7 V to 5.5 V
• Temperature range: −40°C to +150°C
• Voltage range: 2.7 V to 5.5 V
• Programmable interruptsCritical overtemperature interruptOvertemperature/undertemperature interrupt
• Critical overtemperature interrupt
• Overtemperature/undertemperature interrupt
• I2C-compatible interface
• 16-lead, 4 mm × 4 mm LFCSP RoHS-compliant package
Description
AI
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 HighlightsEase of use, no calibration or correction required by the user.Low power consumption.Excellent long-term stability and reliability.High accuracy for industrial, instrumentation, and medical applications.Packaged in a 16-lead, 4 mm × 4 mm LFCSP RoHS-compliant package.ApplicationsRTD and thermistor replacementThermocouple cold junction compensationMedical equipmentIndustrial control and testFood transportation and storageEnvironmental monitoring and HVACLaser diode temperature control
