This document describes the features and characteristics of the ADT7408 12-Bit Digital Temperature Sensor, including ±2°C accuracy, -20°C to +125°C operating temperature range, 3V to 3.6V operating voltage range, 240μA typical average supply current, etc.
The ADT7408 is a 12‑bit digital temperature sensor designed for memory‑module temperature monitoring and a wide range of industrial and computer applications. It offers ±2 °C accuracy over a –20 °C to +125 °C range, operates from 3.0 V to 3.6 V, and features an SMBus/I²C‑compatible interface with a dual‑purpose EVENT# pin that can act as a comparator or interrupt.
The document provides full specifications, pin descriptions, timing characteristics, and operation modes. It includes typical performance graphs, absolute maximum ratings, and detailed register maps for configuring conversion, alarm thresholds, and shutdown behavior.
| Supply Voltage | 3.0 V to 3.6 V |
|---|---|
| Average Supply Current (typical) | 240 µA |
| Shutdown Mode Current (typical) | 3 µA |
| ADC Resolution | 12 Bits |
| Temperature Resolution | 0.0625 °C |
| Operating Temperature Range | –20 °C to +125 °C |
| SCL Clock Frequency | 10 kHz to 100 kHz |
| Pin Capacitance | 10 pF |
| EVENT# Output Low‑Voltage Sink Current | 3 mA |
The ADT7408 operates from 3.0 V to 3.6 V.
The device features an SMBus/I²C‑compatible serial interface.
The open‑drain EVENT# output can sink up to 3 mA.