ADI ADT7420UCPZ-RL7

The AD7420 is a high-precision digital temperature sensor in a 4mm×4mm LFCSP package, delivering breakthrough performance across a wide industrial temperature range. It integrates a bandgap temperature reference, a temperature sensor, and a 16-bit ADC for temperature monitoring and digital conversion, with a resolution of 0.0078°C. The default ADC resolution is set to 13 bits (0.0625°C). ADC resolution is user-programmable and can be changed via the serial interface. The AD7420 is guaranteed to operate over a supply voltage range of 2.7V to 5.5V; at 3.3V, the typical average supply current is 210μA. The AD7420 features a shutdown mode to power down the device, with a typical shutdown current of 2.0μA at 3.3V. The rated operating temperature range is −40°C to +150°C. Pins A0 and A1 are used for address selection, providing four I2C addresses for the AD7420. The CT pin is an open-drain output that asserts when the temperature exceeds the critical temperature limit (programmable). The INT pin is also an open-drain output that asserts when the temperature exceeds the limit (programmable). Both the INT and CT pins can operate in comparator mode and interrupt event mode.

• Temperature accuracy ±0.20°C (-10°C to +85°C, 3.0V to 3.3V), ±0.25°C (-20°C to +105°C, 3.0V to 3.6V)
• 16-bit temperature resolution: 0.0078°C
• Ultra-low temperature drift: 0.0073°C
• NIST-traceable or equivalent functionality
• 6ms fast first power-on temperature conversion
• Easy implementation — no user temperature calibration/correction required
• No linearity correction required
• Low power consumption
• 1SPS power-saving mode
• Normal mode: 700μW (typical, 3.3V)
• Shutdown mode: 7μW (typical, 3.3V)
• Wide operating range
• Temperature range: -40°C to +150°C
• Voltage range: 2.7V to 5.5V
• Programmable interrupt
• Critical overtemperature interrupt
• Overtemperature/undertemperature interrupt
• I2C-compatible interface
• 16-pin, 4mm×4mm LFCSP package, RoHS compliant
• Easy to use — no user correction or calibration required
• Excellent long-term stability and reliability
• High accuracy for industrial, instrumentation, and medical applications

• RTD and thermistor replacement
• Thermocouple cold junction compensation
• Medical devices
• Industrial control and testing
• Food transportation and storage
• Environmental monitoring and HVAC
• Laser diode temperature control