Datasheet
LM96000
www.ti.com
SNAS234C –APRIL 2004–REVISED MARCH 2013
LM96000 Hardware Monitor with Integrated Fan Control
Check for Samples: LM96000
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FEATURES
KEY SPECIFICATIONS
2
• 2-wire, SMBus 2.0 Compliant, Serial Digital
• Voltage Measurement Accuracy ±2% FS (max)
Interface
• Resolution 8-bits, 1°C
• 8-bit ΣΔ ADC
• Temperature Sensor Accuracy ±3°C (max)
• Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V
• Temperature Range
Motherboard/processor Supplies
– LM96000 Operational 0°C to +85°C
• Monitors 2 Remote Thermal Diodes
– Remote Temp Accuracy 0°C to +125°C
• Programmable Autonomous Fan Control
• Power Supply Voltage +3.0V to +3.6V
Based on Temperature Readings
• Power Supply Current 0.53 mA
• Noise Filtering of Temperature Reading for
Fan Control
DESCRIPTION
• 1.0°C Digital Temperature Sensor Resolution
The LM96000, hardware monitor, has a two wire
• 3 PWM Fan Speed Control Outputs
digital interface compatible with SMBus 2.0. Using an
8-bit ΣΔ ADC, the LM96000 measures:
• Provides High and Low PWM Frequency
• the temperature of two remote diode connected
Ranges
transistors as well as its own die
• 4 Fan Tachometer Inputs
• the VCCP, 2.5V, 3.3VSBY, 5.0V, and 12V
• Monitors 5 VID Control Lines
supplies (internal scaling resistors).
• 24-pin TSSOP Package
To set fan speed, the LM96000 has three PWM
• XOR-tree Test Mode
outputs that are each controlled by one of three
temperature zones. High and low PWM frequency
APPLICATIONS
ranges are supported. The LM96000 includes a
digital filter that can be invoked to smooth
• Desktop PC
temperature readings for better control of fan speed.
• Microprocessor based equipment
The LM96000 has four tachometer inputs to measure
– (e.g. Base-stations, Routers, ATMs, Point of
fan speed. Limit and status registers for all measured
Sales)
values are included.
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Copyright © 2004–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.