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LM94 Datasheet(PDF) 1 Page - Texas Instruments |
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LM94 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 112 page  LM94 www.ti.com SNAS264C – APRIL 2006 – REVISED MARCH 2013 LM94 TruTherm™ Hardware Monitor with PI Loop Fan Control for Server Management Check for Samples: LM94 1 FEATURES • 2-wire Serial Digital Interface, SMBus 2.0 Compliant 23 • 8-bit ΣΔ ADC – Supports Byte/block Read and Write • Monitors 16 Power Supplies – Selectable Slave Address (Tri-level Pin • Monitors 4 Remote Thermal Diodes and 2 Selects 1 of 3 Possible Addresses) LM60 – ALERT Output Supports Interrupt or • New TruTherm Technology Support for Comparator Modes Precision Thermal Diode Measurements • 2.5V Reference Voltage Output • Internal Ambient Temperature Sensing • 56-pin TSSOP Package • Programmable Autonomous Fan Control • XOR-tree Test Mode Based on Temperature Readings with Fan Boost Support APPLICATIONS • Fan Boost Support on Tachometer Limit Error Event • Servers • Fan Control Based on 13-step Lookup Table or • Workstations PI Control Loop or Combination of Both • Multi-processor based equipment • PI Fan Control Loop Supports Tcontrol KEY SPECIFICATIONS • Temperature Reading Digital Filters • Voltage Measurement Accuracy ... ±2% FS • 0.5°C digital Temperature Sensor Resolution (max) • 0.0625°C Filtered Temperature Resolution for • Temperature Resolution ... 9-bits, 0.5°C Fan Control • Temperature Sensor Accuracy ... ±2.5 °C (max) • 2 PWM Fan Speed Control Outputs • Temperature Range: • 4 Fan Tachometer Inputs – LM94 Operational ... 0°C to +85°C • Dual Processor Thermal Throttling (PROCHOT) Monitoring – Remote Temp Accuracy ... 0°C to +125°C • Dual Dynamic VID Monitoring (6/7 VIDs per • Power Supply Voltage ... +3.0V to +3.6V processor) Supports VRD10.2/11 • Power Supply Current ... 1.6 mA • 8 General Purpose I/Os: DESCRIPTION – 4 Can be Configured as Fan tachometer Inputs The LM94 hardware monitor has a two wire digital interface compatible with SMBus 2.0. Using a ΣΔ – 2 Can be Configured to Connect to ADC, the LM94 measures the temperature of four Processor THERMTRIP remote diode connected transistors as well as its own – 2 are Standard GPIOs that Could be Used die and 16 power supply voltages. The LM94 has to Monitor IERR Signal new TruTherm technology that supports precision thermal diode measurements of processors on sub- • 2 General Purpose Inputs that Can be Used to micron processes. Monitor the 7th VID Signal for VRD11 • Limit Register Comparisons of all Monitored Values 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 I2C is a trademark of dcl_owner. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2013, 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. |
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