Analog Devices Inc. ADT7320/ADT7420 Digital Temperature Sensors

Analog Devices Inc. ADT7320/ADT7420 Digital Temperature Sensors are ±0.25°C accurate SPI/I²C digital temperature sensors that provide excellent performance over a -40°C to +150°C temperature range. The ADT7320/ADT7420 Digital Sensors include an internal band gap reference, a temperature sensor, and a 16-bit ADC to monitor and digitize the temperature to a resolution of 0.0078°C. Using the SPI/I²C serial interface, designers can change the default ADC resolution set at 13 bits (0.0625°C) to meet their application requirements. Operating at 3.3V, the ADT7320/ADT7420 sensors are guaranteed to operate over the 2.7V to 5.5V supply voltage range with a typical supply current of 210μA. The ADT7320/ADT7420 sensors include a shutdown mode that powers down the device and delivers a typical shutdown current of 2μA at 3.3V. The Analog Devices ADT7320/ADT7420's high accuracy makes the sensors ideal for instrumentation, industrial, and medical applications.

Features

High performance
- Temperature Accuracy
  - ±0.20°C from −10°C to +85°C at 3V
  - ±0.25°C from −20°C to +105°C at 2.7V to 3.3V
- 16-bit temperature resolution: 0.0078°C
Ultra-Low Temperature Drift: 0.0073°C
- NIST traceable or equivalent
- Fast first temperature conversion on power-up of 6ms
Easy Implementation
- No temperature calibration/correction required by user
- No linearity correction required
Low Power
- Power saving 1 sample per second (SPS) mode
- 700μW typical at 3.3 V in normal mode
- 7μW typical at 3.3 V in shutdown mode

Wide Operating Ranges
- −40°C to +150°C temperature range
- 2.7V to 5.5V voltage range
Programmable Interrupts
- Critical over temperature interrupt
- Over temperature/under temperature interrupt
SPI-compatible interface (ADT7320)
I²C-compatible interface (ADT7420)
16-lead, RoHS-compliant, 4mm × 4mm LFCSP package