Designed to provide measurement and limit comparison of up to four power supplies and two processor core voltages, plus temperature, two fan speeds and chassis intrusion, ADM9240 chip is a complete system hardware monitor for microprocessor-based systems. The DMI 2.0-compliant monitoring device includes on-chip temperature sensing, supply voltage attenuation network and fan speed monitoring circuitry, as well as A/D conversion to facilitate communication over the SMBus. Also, on-chip DAC is used to control fan speed for present and next-generation ACPI-compliant systems. The device is optimized for use in motherboards that feature the Pentium II processor, with its low power and I2C-compatible interface making it suited for hardware monitoring and protection application in PCs, network servers, microprocessor-based electronic test equipment and office electronics. Values measured can be read out through an I2C-compatible system management bus, and values for limit comparisons can also be programmed over the same serial bus. The device comes with a comprehensive reference design, including pc board layout and schematics, and an evaluation board with Visual Basic GUI.
Company: ANALOG DEVICES INC.
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