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      Top Picks
      • onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
      1/1
      onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
      $ 3 .81

      ✔ In Stock (Can ship in 5-7 days)

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      The ADM1031 is an ACPI-compliant, three-channel digital thermometer and under/overtemperature alarm for use in personal computers and thermal management systems. Optimized for the PentiumIII, the part offers a 1C higher accuracy, which allows system designers to safely reduce temperature guard-banding and increase system performance. Two PWM fan control outputs control the speed of two cooling fans by varying output duty cycle. Duty cycle values between 33% and 100% allow smooth control of the fans. The speed of each fan can be monitored via TACH inputs, which can be reprogrammed as analog inputs to allow speeds for 2-wire fans to be measured via sense resistors. The device also detects a stalled fan. A dedicated fan speed control loop provides control without the intervention of CPU software. It also ensures that if the CPU or system locks up, each fan can still be controlled based on temperature measurements, and the fan speed is adjusted to correct any changes in system temperature. Fan speed can also be controlled using existing ACPI software. Two inputs (4 pins) are dedicated to remote temperature-sensing diodes with an accuracy of 1C, and an on-chip temperature sensor allows ambient temperature to be monitored. The device has a programmable INT output to indicate error conditions, and a dedicated FAN_FAULT output to signal fan failure. The THERM pin is a fail-safe output for overtemperature conditions that can be used to throttle a CPU clock.

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      Reviews

      • A

        Aaron Gyarfas

        Aug 11, 2025

        onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
        I found the perfect brownie that covers my UV lights nicely.
        Helpful
        Unhelpful
      • G

        Gregory Wargo

        Jun 14, 2025

        onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
        Fantastic service and the part was perfect fit.
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        Unhelpful
      • R

        Richard Wakeland

        Apr 22, 2025

        onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
        The item arrived much sooner than I anticipated.
        Helpful
        Unhelpful
      • M

        MARCO BACA

        Feb 19, 2024

        onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
        Difficult to get my card to work. Fighting address problems then card showed invalid a few times, finally got it right. On the upside- you’re the only place I can find this part so I’ll be back!
        Helpful
        Unhelpful
      • A

        Anonymous user

        Nov 25, 2022

        onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7
        All was ok! No problems whatsoever.
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      onsemi IC Integrated Circuit Chip ADM1031ARQZ-REEL7

      $ 3 .81
      Click here to view shipping costs.

      ✔ In Stock (Can ship in 5-7 days)

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      MOQ : 82
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