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LM96000CIMT Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM96000CIMT Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 28 page  LM96000 Hardware Monitor with Integrated Fan Control General Description The LM96000, hardware monitor, has a two wire digital interface compatible with SMBus 2.0. Using an 8-bit Σ∆ ADC, the LM96000 measures: – the temperature of two remote diode connected transis- tors as well as its own die – the VCCP, 2.5V, 3.3VSBY, 5.0V, and 12V supplies (in- ternal scaling resistors). To set fan speed, the LM96000 has three PWM outputs that are each controlled by one of three temperature zones. High and low PWM frequency ranges are supported. The LM96000 includes a digital filter that can be invoked to smooth temperature readings for better control of fan speed. The LM96000 has four tachometer inputs to measure fan speed. Limit and status registers for all measured values are included. Features n 2-wire, SMBus 2.0 compliant, serial digital interface n 8-bit Σ∆ ADC n Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V motherboard/processor supplies n Monitors 2 remote thermal diodes n Programmable autonomous fan control based on temperature readings n Noise filtering of temperature reading for fan control n 1.0˚C digital temperature sensor resolution n 3 PWM fan speed control outputs n Provides high and low PWM frequency ranges n 4 fan tachometer inputs n Monitors 5 VID control lines n 24-pin TSSOP package n XOR-tree test mode Key Specifications n Voltage Measurement Accuracy ±2% FS (max) n Resolution 8-bits, 1˚C n Temperature Sensor Accuracy ±3˚C (max) n Temperature Range — LM96000 Operational 0˚C to +85˚C — Remote Temp Accuracy 0˚C to +125˚C n Power Supply Voltage +3.0V to +3.6V n Power Supply Current 0.53 mA Applications n Desktop PC n Microprocessor based equipment (e.g. Base-stations, Routers, ATMs, Point of Sales) Block Diagram 20084601 November 2004 © 2004 National Semiconductor Corporation DS200846 www.national.com |
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