Dual Channel Temperature Sensor and Over Temperature Alarm

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Overview

The ADT7481 is a 3-channel digital thermometer and under/over temperature alarm, intended for use in PCs and thermal management systems. It can measure its own ambient temperature or the temperature of two remote thermal diodes. These thermal diodes can be located in a CPU or GPU, or they can be discrete diode connected transistors. The ambient temperature, or the temperature of the remote thermal diiode, can be accurately measured to ±1°C. The temperature measurement range defaults to 0°C to +127°C, compatible with ADM1032, but can be switched to a wider measurement range from -64°C to +191°C.

  • Industrial controllers
  • Smart batteries
  • Embedded systems
  • Burn-in applications
  • Desktop and notebook computers
  • Automotive
  • Instrumentation
  • 1 Local and 2 Remote Temperature Sensors
  • 0.25°C Resolution/1°C Accuracy on Remote Channels
  • 1°C Resolution/1°C Accuracy on Local Channel
  • Extended, Switchable Temperature Measurement Range 0°C to +127°C (default) or 64°C to +191°C
  • 2-wire SMBus Serial Interface with SMBus Alert Support
  • Programmable Over/Under Temperature Limits
  • Offset Registers for System Calibration
  • Up to 2 over Temperature Fail-safe THERM Outputs
  • 240 µA Operating Current, 5 µA Standby Current

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MSL Type

MSL Temp (°C)

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ON Target

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ICC Max (mA)

VCC Min (V)

VCC Max (V)

T Min (°C)

T Max (°C)

Temperature Error (°C)

Reference Price

ADT7481ARMZ-REEL

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Active

CAD Model

Pb

A

H

P

Micro10

1

260

REEL

3000

Y

Local & Remote

SMBus

0.35

3

3.6

-40

125

±1

$3.8402

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