The ADT7420 is a ±0.25°C accurate, 16-bit digital I2C temperature sensor. It features high performance, low power, wide operating ranges and programmable interrupts.
The ADT7420 is a high‑accuracy digital temperature sensor from Analog Devices. It provides 16‑bit resolution (0.0078 °C) via an I²C interface and operates over a wide temperature range (‑40 °C to +150 °C) and supply range (2.7 V to 5.5 V). The device includes programmable interrupts, address selection pins, and a shutdown mode for ultra‑low power consumption.
The datasheet details functional block diagrams, pin configurations, timing specifications, electrical ratings, and operating modes such as normal, one‑shot, 1 SPS, and shutdown. It also describes the fault‑queue feature, temperature data format, and register map for software integration.
| Temperature accuracy | ±0.20 °C (‑10 °C to +85 °C, 3.0 V‑3.3 V) |
|---|---|
| Temperature accuracy (extended range) | ±0.25 °C (‑20 °C to +105 °C, 3.0 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 |
| Normal‑mode power consumption | 700 µW at 3.3 V |
| First conversion time (power‑up) | 6 ms |
| 1 SPS conversion time | 60 ms |
| I²C address options | 4 possible addresses (A0, A1 pins) |
The sensor achieves ±0.20 °C accuracy from ‑10 °C to +85 °C (3.0 V‑3.3 V) and ±0.25 °C from ‑20 °C to +105 °C (3.0 V‑3.6 V).
In normal (continuous) mode it consumes about 700 µW at a 3.3 V supply.
The device operates from 2.7 V up to 5.5 V.
Two address pins (A0, A1) allow four possible I²C addresses.