Hardware Monitor with Integrated Fan Control - LM96000

LM96000 (ACTIVE)

Hardware Monitor with Integrated Fan Control

 

Description

The LM96000, hardware monitor, has a two wire digital interface compatible with SMBus 2.0. Using an 8-bit ΣΔ ADC, the LM96000 measures:

  • the temperature of two remote diode connected transistors as well as its own die
  • the VCCP, 2.5V, 3.3VSBY, 5.0V, and 12V supplies (internal 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

  • 2-wire, SMBus 2.0 Compliant, Serial Digital Interface
  • 8-bit ΣΔ ADC
  • Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V Motherboard/processor Supplies
  • Monitors 2 Remote Thermal Diodes
  • Programmable Autonomous Fan Control Based on Temperature Readings
  • Noise Filtering of Temperature Reading for Fan Control
  • 1.0°C Digital Temperature Sensor Resolution
  • 3 PWM Fan Speed Control Outputs
  • Provides High and Low PWM Frequency Ranges
  • 4 Fan Tachometer Inputs
  • Monitors 5 VID Control Lines
  • 24-pin TSSOP Package
  • XOR-tree Test Mode

Key Specifications

  • Voltage Measurement Accuracy ±2% FS (max)
  • Resolution 8-bits, 1°C
  • Temperature Sensor Accuracy ±3°C (max)
  • Temperature Range
    • LM96000 Operational 0°C to +85°C
    • Remote Temp Accuracy 0°C to +125°C
  • Power Supply Voltage +3.0V to +3.6V
  • Power Supply Current 0.53 mA

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Parametrics Compare all products in Monitoring & Fan Control

 
Analog Inputs
No. of Temperature Sensors
Pin/Package
Operating Temperature Range (C)
Temperature Sensor Accuracy (C)
Temperature Sensor Resolution (C)
PWM Duty Cycle Resolution (bits)
GPIOs
Fan Speed Measurement Accuracy (%)
Rating
Interface Type
Fan Control Method
Fan Control Output(s)
TruTherm(TM) Beta Compensation
VID Inputs
Fan Speed Inputs
Interrupt Outputs (Count)
Quiescent Current (mA)
Voltage in ADC Resolution (bits)
LM96000 LM96194
4, V+    8 to 6, V+   
3    5   
24TSSOP    48WQFN   
0 to 125    -40 to 100   
3C max for 0C to 100C
4C max for 100C to 125C   
2.5C max for 0C to 85C   
2    1   
8    9   
6 power supply monitors
3 PWM
4 TACH
5 VID   
9 power supply monitors
2 PWM
4 TACH
2 PROCHOT
14 VID
8 GPIO
2 VRDHOT
ALERT   
10    6   
Catalog    Catalog   
SMBus    SMBus   
Linear    PI and Lookup Table   
3 PWM
22.5kHz   
2 PWM   
No    Yes   
5    7   
4    4   
0    1   
0.53    1.6   
8    8