ADT7408:  ± 2°C Accurate, 12-Bit Digital Temperature Sensor

The ADT7408 is the first digital temperature sensor that complies with JEDEC standard JC-42.4 for Mobile Platform Memory Module. The ADT7408 contains a band gap temperature sensor and 12-bit ADC to ...More

ADT7408:  ± 2°C Accurate, 12-Bit Digital Temperature Sensor

Product Description

The ADT7408 is the first digital temperature sensor that complies with JEDEC standard JC-42.4 for Mobile Platform Memory Module. The ADT7408 contains a band gap temperature sensor and 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 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 allows 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 3.3 V, the average supply current is less than typically 240μA. The ADT7408 offers a shutdown mode that powers down the device and gives a shutdown current of typically 3 μA. The ADT7408 is rated for operation over the –20°C to +125°C temperature range. The ADT7408 is available in lead-free 8-lead LFCSP 3mm x 3mm (JEDEC MO- 229 VEED-4) package.

Applications

  • Memory Module Temperature Monitoring
  • Isolated Sensors
  • Environmental Control Systems
  • Computer Thermal Monitoring
  • Thermal Protection
  • Industrial Process Control
  • Power-system Monitors
  • Hand Held Applications

    • Features

    • 12-bit Temperature-to-digital Converter
    • ± 2°C Accuracy Typ
    • Operation from −20°C to +125°C
    • Operation from 3 V to 3.6 V
    • Average Supply Current (500μA max)
    • Selectable 0, 1.5°C, 3°C, 6°C Hysteresis
    • SMBus-/I2C-Compatible Interface
    • Dual Purpose Event Pin: Comparator or Interrupt
    • 8-pin LFCSP 3mm x 3mm (JEDEC MO-229 VEED-4) Package
    • Complies with JEDEC Standard JC-42.4 Memory Module
    • Thermal Sensor Component Specification

    Diagrams

    ADT7408 Diagram
    Functional Block Diagram for ADT7408

    Specifications

    Output Type Digital
    Sensor Output I²C ®,SMBus
    Temp Res(°C/LSB) 0.0625°C/LSB
    Supply Voltage Range +3V to +3.6V
    Temp Range(s) -20 to +125

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