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 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. 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 Applications • Servers • Workstations • Processor based equipment

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	Block Diagram click for larger image LM96194 Block Diagram

Datasheet

Title		Size	Date	Other Language
	LM96194 TruTherm Hardware Monitor with PI Fan Control for Workstation Management	542 Kbytes	19-Mar-07	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1727: Application Note 1727 Calibrating the ADC08xxxx Family of Ultra High-Speed Converters	72 Kbytes	6-Mar-08	日本語 中文

More Application Notes

Title		Size	Date	Other Language
	AN-1155: Application Note 1155 A Simple Software I2C Routine for the COP8	82 Kbytes	15-May-04
	AN-1260: Application Note 1260 Autonomous Fan Control for Processor Systems Using the LM85	74 Kbytes	10-Mar-04
	AN-1262: Application Note 1262 Four-Speed Fan Control Using Simple Remote Diode Temperature Sensor	70 Kbytes	1-Oct-02

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM96194CISQ	CMOS7	0	18406	0	0	1089000	4	309006723

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.

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