Intelligent Temperature Monitor and PWM Fan Controller

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Overview

The ADM1030 is an ACPI-compliant two-channel digital thermometer and under/over temperature alarm, for use in computers and thermal management systems. Optimized for the Pentium® III, the higher 1°C accuracy offered allows systems designers to safely reduce temperature guardbanding and increase system performance. A Pulsewidth Modulated (PWM) Fan Control output controls the speed of a cooling fan by varying output duty cycle. Duty cycle values between 33%-100% allow smooth control of the fan. The speed of the fan can be monitored via a TACH input for a fan with a tach output. The TACH input can be programmed as an analog input, allowing the speed of a 2-wire fan to be determined via a sense resistor. The device will also detect a stalled fan. A dedicated Fan Speed Control Loop provides control even without the intervention of CPU software. It also ensures that if the CPU or system locks up, the fan can still be controlled based on temperature measurements, and the fan speed adjusted to correct any changes in system temperature. Fan Speed may also be controlled using existing ACPI software.

  • Thermal Management
  • Notebook and Desktop Computers
  • Game Consoles
  • RFID Readers
  • Programmable (ACPI) and Automatic Fan Speed Control
  • Automatic Fan Speed Control
  • Control Loop
  • RPM Select Mode to Maintain Constant Fan Speed
  • 0.125°C Resolution on External Temperature Channel
  • External Temperature Measurement Accurate to 1°C using Remote Diode
  • Local Temperature Sensor with 0.25°C Resolution
  • Pulse Width Modulation Fan Control (PWM)
  • Programmable PWM Frequency
  • Programmable PWM Duty Cycle
  • Tach Fan Speed Measurement

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CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

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ON Target

Data Transmission Standard

ICC Max (mA)

VCC Min (V)

VCC Max (V)

T Min (°C)

T Max (°C)

Reference Price

ADM1030ARQZ

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Obsolete

CAD Model

Pb

A

H

P

QSOP-16

1

260

TUBE

98

N

SMBus

3

3

5.5

0

100

Price N/A

More Details

ADM1030ARQZ-REEL

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Obsolete

CAD Model

Pb

A

H

P

QSOP-16

1

260

REEL

2500

N

SMBus

3

3

5.5

0

100

Price N/A

More Details

ADM1030ARQZ-RL7

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Obsolete

CAD Model

Pb

A

H

P

QSOP-16

1

260

REEL

1000

N

SMBus

3

3

5.5

0

100

Price N/A

More Details

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