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ADT7408

Analog Devices
Part Number ADT7408
Manufacturer Analog Devices
Description 12-Bit Digital Temperature Sensor
Published Jan 16, 2007
Detailed Description www.DataSheet4U.com ±2°C Accurate, 12-Bit Digital Temperature Sensor ADT7408 FEATURES 12-bit temperature-to-digital con...
Datasheet PDF File ADT7408 PDF File

ADT7408
ADT7408

Overview
www.
DataSheet4U.
com ±2°C Accurate, 12-Bit Digital Temperature Sensor ADT7408 FEATURES 12-bit temperature-to-digital converter ±2°C accuracy Operation from −20°C to +125°C Operation from 3 V to 3.
6 V 240 μA typical average supply current Selectable 1.
5°C, 3°C, 6°C hysteresis SMBus-/I2C®-compatible interface Dual-purpose event pin: comparator or interrupt 8-lead LFCSP_VD, 3 mm × 3 mm (JEDEC MO-229 VEED-4) package Complies with JEDEC standard JC-42.
4 memory module Thermal sensor component specification FUNCTIONAL BLOCK DIAGRAM VDD 8 12- / 10-Bit DECIMATOR TEMPERATURE SENSOR LPF 1-BIT – + DIGITAL COMPARATOR 7 EVENT# + REFERENCE – ∑-∆ CLK AND TIMING GENERATION 1-BIT DAC CAPABILITY REGISTER CONFIGURATION REGISTER ALARM TEMP UPPER BOUNDARY TRIP REGISTER ALARM TEMP LOWER BOUNDARY TRIP REGISTER CRITICAL TEMP REGISTER TEMPERATURE REGISTER 5 6 ADDRESS POINTER REGISTER MANUFACTURER’S ID REGISTER ADT7408 A0 1 A1 2 A2 3 APPLICATIONS Memory module temperature monitoring Isolated sensors Environmental control systems Computer thermal monitoring Thermal protection Industrial process control Power system monitors FACTORY RESERVED REGISTER SMBus/I²C INTERFACE 4 SDA SCL 05716-001 Vss Figure 1.
GENERAL DESCRIPTION The ADT7408 is the first digital temperature sensor that complies with JEDEC standard JC-42.
4 for the mobile platform memory module.
The ADT7408 contains a band gap temperature sensor and a 12-bit ADC to monitor and digitize the temperature to a resolution of 0.
0625°C.
There is an open-drain EVENT# output that is active when the monitoring temperature exceeds a critical programmable limit or when the temperature falls above or below an alarm window.
This pin can operate in either comparator or interrupt mode.
There are three slave device address pins that allow up to eight ADT7408s to be used in a system that monitors temperature of various components and subsystems.
The ADT7408 is specified for operation at supply voltages from 3.
0 V to 3.
6 V.
Operating at 3...


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