LM96194 - TruTherm™ Hardware Monitor with PI Fan Control for Workstation Management from the PowerWise® Family
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
• ΣΔ ADC architecture
• Monitors 9 power supplies
• Monitors 4 remote thermal diodes and 2 LM60
• New TruTherm technology support for precision thermal diode measurements
• Internal ambient temperature sensing
• Programmable autonomous fan control based on temperature readings with fan boost support
• Fan boost support on tachometer limit error event
• Fan control based on 13-step lookup table or PI Control Loop or combination of both
• PI fan control loop supports Tcontrol
• Temperature reading digital filters
• 0.5°C digital temperature sensor resolution
• 0.0625°C filtered temperature resolution for fan control
• 2 PWM fan speed control outputs
• 4 fan tachometer inputs
• Processor thermal throttling ( ^PROCHOT) monitoring
• Dynamic VID monitoring (6/7 VIDs per processor) supports VRD10.2/11
• 8 general purpose I/Os:
• 4 can be configured as fan tachometer inputs
• 2 can be configured to connect to processor ^THERMTRIP
• 2 are standard GPIOs that could be used to monitor ^IERR signal
• A general purpose inputs that can be used to monitor the 7th VID signal for VRD11
• Limit register comparisons of all monitored values
• 2-wire serial digital interface, SMBus 2.0 compliant
• Supports byte/block read and write
• Selectable slave address (tri-level pin selects 1 of 3 possible addresses)
• ^ALERT output supports interrupt or comparator modes
• LLP-48 package
• XOR-tree test mode

Key Specification

Voltage Measurement Accuracy

±2% FS (max)

Temperature Resolution

9-bits, 0.5°C

Temperature Sensor Accuracy

±2.5 °C (max)

Temperature Range:

Power Supply Voltage

+3.0V to +3.6V

Power Supply Current

1.6 mA

  • LM96194 Operational

    -40°C to +85°C

    Remote Temp Accuracy

    -40°C to +125°C

    • General Description

    The LM96194 hardware monitor has a two wire digital interface compatible with SMBus 2.0. More...


    Applications

    • Servers
    • Workstations
    • Processor based equipment
    		 

    ParametersValues
    Temp Resolution 9-bit/0.5degC
    Remote Diode Thermal Sensors 4
    TruTherm(TM) Beta Compensation Yes
    Analog Inputs 8 to 6, V+
    ADC Resolution 8 bits
    Fan Speed Inputs 4
    Fan Control Output(s) 2 PWM, 22.5kHz
    Fan Control Method PI and Lookup Table
    VID Inputs 7
    Dynamic VID VCCP Monitoring 1
    Bidirectional PROCHOT Support 1
    GPIOs 8 GPIO, 1 GPI, RESET
    Interrupt Outputs 1
    Reference Voltage Undefined
    Temperature Accuracy (+/-) 2.5 deg C
    Temperature Min -40 deg C
    Temperature Max 100 deg C
    Interface Type SMBus
    Supply Min 3 Volt
    Supply Max 3.6 Volt
    Quiescent Current 1.6 mA
    Resolution 9 bits
    Temperature Accuracy (+/-) 2.5 deg C
    Automotive Yes
    PowerWise Yes

    Also Recommended

    LM94▲Dual Processor Hardware Monitor For Servers With TruTherm BJT/Transistor Beta Compensation Technolog
    Block Diagram
    click for larger image

    LM96194 Block Diagram

    Datasheet
    RoHS Compliance Information Size in KbytesDate Click link below to Download
    LM96194 TruTherm Hardware Monitor with PI Fan Control for Workstation Management 542
    Kbytes    		 19-Mar-07 Download
    LM96194 TruTherm Hardware Monitor with PI Fan Control for Workstation Management (Japanese)
    		 563 Kbytes   Download

    If you have trouble printing or viewing PDF file(s), see Printing Problems.


    Package Availability, Models, Samples & Pricing
    Part NumberPackageFactory Lead TimeModelsSamples &
    Electronic
    Orders    		Budgetary PricingStd
    Pack
    Size    		Package
    Marking
    Format
    TypePinsSpec.MSL
    Rating    		Peak
    Reflow    		RoHS
    Report    		CAD
    Symbols    		WeeksQtyQty$US each
    LM96194CISQLLP48NOPB2260RoHS Download Full productionN/A
    		Samples
    Buy Now     		1K+$4.00reel
    of
    250    		NS
    UZXYTTE#
    LM96194
    6 weeksN/A

    General Description

    The LM96194 hardware monitor has a two wire digital interface compatible with SMBus 2.0. Using a ΣΔ ADC, the LM96194 measures the temperature of four remote diode connected transistors as well as its own die and 9 power supply voltages. The LM96194 has new TruTherm technology that supports precision thermal diode measurements of processors on sub-micron processes.

    To set fan speed, the LM96194 has two PWM outputs that are each controlled by up to six temperature zones. The fan-control algorithm can be based on a lookup table, PI (proportional/integral) control loop, or a combination of both. The LM96194 includes digital filters that can be invoked to smooth temperature readings for better control of fan speed such that acoustical noise is minimized. The LM96194 has four tachometer inputs to measure fan speed. Limit and status registers for all measured values are included.

    The LM96194 includes most of the features of the LM94, dual CPU motherboard server management ASIC, such as measurement and control support for dynamic Vccp monitoring for VRD10/11 and ^PROCHOT but is targeted for single processor systems.

    Reliability Metrics

    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM96194CISQCMOS70184060010890004309006723

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    [Information as of 7-Nov-2009]