MAX6581

PRODUCTION

±1°C Accurate 8-Channel Temperature Sensor

Saves Cost and Space (Monitors Up to Seven External Temperatures, as Well as Its Own Die Temperature)

Data Sheet (Rev. 5) Product Selection Table
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Overview

  • Eight Channels to Measure Seven Remote and One Local Temperature
  • 11-Bit, 0.125°C Resolution
  • High Accuracy of ±1°C (max) from +60°C to +100°C (Remote Channels)
  • -64°C to +150°C Remote Temperature Range
  • Programmable Undertemperature/Overtemperature Alerts
  • SMBus/I²C-Compatible Interface
  • Two Open-Drain Alarm Outputs (Active-Low ALERT and Active-Low OVERT)
  • Resistance Cancellation on All Remote Channels

The MAX6581 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to seven external diode-connected transistors. All temperature channels have programmable alert and overtemperature thresholds. When the measured temperature of a channel crosses the respective threshold, a status bit is set in one of the status registers. Two open-drain alarm outputs (active-low ALERT and active-low OVERT) assert corresponding to these bits in the status register(s).

Resistance cancellation is available for all channels and compensates for high series resistance in circuit-board traces and thermal diodes.

The 2-wire serial interface accepts SMBus protocols (write byte, read byte, send byte, and receive byte) for reading the temperature data and programming the alarm thresholds.

The MAX6581 is specified for an operating temperature range of -40°C to +125°C and is available in a 24-pin, 4mm × 4mm thin QFN package with an exposed pad.

Applications

  • Data Communications
  • Desktop Computers
  • Notebook Computers
  • Servers
  • Workstations
MAX6581
±1°C Accurate 8-Channel Temperature Sensor
MAX6581: Typical Application Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 1

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Software Resources

Device Drivers 1

Evaluation Kits

MAX6581EVKIT

Evaluation Kit for the MAX6581

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Features and Benefits

  • Seven Remote Temperature Sensors
  • Local Temperature Sensor
  • Programmable Undertemperature and Overtemperature Alerts
  • Two Open-Drain Alarm Outputs (Active-Low ALERT and Active-Low OVERT)
  • On-Board Microcontroller to Generate SMBus™/I²C Commands
  • Easy-to-Use, Menu-Driven Software
  • Fully Assembled and Tested

Product Details

The MAX6581 evaluation kit (EV kit) is an assembled and tested PCB used to evaluate the MAX6581 8-channel temperature sensor. The device monitors its own die temperature and the temperatures of up to seven external diode-connected transistors. It converts the temperature to 8-bit or 11-bit 2-wire serial data that can be accessed over a 2-wire serial bus.

The EV kit also includes Windows® 2000-, Windows XP®-, and Windows Vista®-compatible software, which provides a simple user interface for exercising the features of the device. The program is menu driven and offers a graphical user interface (GUI) complete with control buttons and status display.

Applications

  • Data Communications
  • Desktop Computers
  • Notebook Computers
  • Servers
  • Workstations
MAX6581EVKIT
Evaluation Kit for the MAX6581

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