The ADT7320 is a 16‑bit digital SPI temperature sensor from Analog Devices offering ±0.25 °C accuracy and low power operation.
The ADT7320 is a high‑precision digital temperature sensor in a 4 mm × 4 mm LFCSP package. It integrates a band‑gap reference, temperature sensor and a 16‑bit ADC, providing a resolution of 0.0078 °C. It operates from 2.7 V to 5.5 V, with typical supply current of 210 µA at 3.3 V and a shutdown current of 2 µA.
The device features programmable over‑temperature and under‑temperature thresholds with open‑drain CT and INT pins that can work in comparator or interrupt mode. Communication is via a standard SPI interface, and the sensor is suited for industrial, instrumentation and medical applications where accuracy and low power are critical. This manual is written in Chinese.
| Temperature accuracy | ±0.25 °C (−20 °C to +105 °C, 3 V–3.6 V) |
|---|---|
| Temperature resolution | 0.0078 °C (16‑bit) |
| Supply voltage range | 2.7 V to 5.5 V |
| Operating temperature range | −40 °C to +150 °C |
| Package | 16‑pin 4 mm × 4 mm LFCSP |
The default ADC resolution is 13 bits, giving a temperature step of 0.0625 °C.
Reset the serial interface by sending 32 consecutive logic‑1 bits on the DIN line after power‑up.
Both CT and INT are open‑drain outputs that become active when temperature exceeds programmable thresholds; they can operate in comparator or interrupt mode.