ADT7420 Datasheet | Analog Devices

Data Sheet ±0.25°C Accurate, 16-Bit Digital I2C Temperature Sensor ADT7420 Features 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-patible interface 16-lead, 4 mm × 4 mm LFCSP Ro HS-pliant package APPLICATIONS RTD and thermistor replacement Thermocouple cold junction pensation Medical equipment Industrial control and test Food transportation and storage Environmental monitoring and HVAC Laser diode temperature control GENERAL DESCRIPTION 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...