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LM96163

www.ti.com

SNAS433D –JUNE 2008–REVISED MAY 2013

LM96163 Remote Diode Digital Temperature Sensor with Integrated Fan Control and

TruTherm

BJT Transistor Beta Compensation Technology

Check for Samples: LM96163

FEATURES

DESCRIPTION

The LM96163 has remote and local temperature

• TruTherm BJT Beta Compensation Technology

sensors with integrated fan control that includes

Supports 45nm, 65nm and 90nm Processor

TruTherm BJT transistor beta compensation

Remote Diodes

technology for remote diode sensing. The LM96163

• Factory Trimmed for Intel® 45 nm Processor

accurately measures: (1) its own temperature and (2)

Thermal Diodes

the temperature of a diode-connected transistor, such

as a 2N3904, or a thermal diode commonly found on

• Accurately Senses Diode-Connected 2N3904

Computer Processors, Graphics Processor Units

Transistors or Thermal Diodes On-board Large

(GPU) and other ASIC's. The LM96163 has an offset

Processors or ASIC's

• Accurately Senses its Own Temperature

ideality factors of other thermal diodes.

• Integrated PWM Fan Speed Control Output

The LM96163 also features an integrated, pulse-

Supports High Resolution at 22.5kHz

width-modulated (PWM), open-drain fan control

Frequency for 4-pin Fans

output. Fan speed depends on a combination of the

• Acoustic Fan Noise Reduction with User-

remote temperature reading, the lookup table and

Programmable 12-Step Lookup Table

enables the user to program a non-linear fan speed

• LUT Transition Fine Resolution Smoothing

vs. temperature transfer function often used to quiet

Function

acoustic fan noise. In addition a fully programmable

• Tachometer Input for Measuring Fan RPM

ramping function has been added to allow smooth

• Smart-Tach Modes for Measuring RPM of Fans transitions between LUT setpoints.

with Pulse-Width-Modulated Power as Shown

Table 1. Key Specifications

in Typical Application

■ Remote Temp Accuracy (includes quantization error)

• ALERT Output for Processor Event

LM96163 Temp DiodeTemp Max Error

Notification

+25 to +85°C +50 to +105°C ±0.75°C

• TCRIT Output for Critical Temperature System

+25 to +85°C +40 to +125°C ±1.5°C

Shutdown

-40 to +25°C +25 to 125°C ±3.0°C

• Offset Register Can Adjust for a Variety of

■ Local Temp Accuracy (includes quantization error)

Thermal Diodes

LM96163 Temp 25°C to 125°C ±3.0°C (max)

• 10-Bit Plus Sign and 11-Bit Unsigned Formats,

■ Supply Voltage +3.0 V to +3.6 V

with 1/8°C Resolution

■ Supply Current (0.8Hz Conversion) 456 µA (typ)

• Extended Resolution to 1/32°C when Digital

Filter Enabled

• Resolves Remote Diode Temperatures up to

255.875°C

• SMBus 2.0 Compatible Interface, with

TIMEOUT and ARA

• 10-Pin SON Package

APPLICATIONS

• Processor Thermal Management

• Electronic Test and Office Equipment

• Industrial Controls

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.

2All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (47 pages)

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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 LM96163 Remote Diode Digital Temperature Sensor with Integrated Fan Control and TruTherm® BJT Transistor Beta Compensation Technology Check for Samples: LM96163 FEATURES DESCRIPTION • The LM96163 has remote and local temperature sensors with integrated fan control that includes TruTherm BJT transistor beta compensation technology for remote diode sensing.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com Connection Diagrams 1 10 2 9 3 8 TCRIT VDD SMBCLK SMBDAT D+ 4 D5 LM96163 TACH 7 ALERT 6 PWM GND Figure 1. 10-Pin SON (TopView) See DSC0010A Package Pin Descriptions Pin 2 Name Input/Output Function and Connection Open-Drain Digital Output. Connect to system shutdown. Pin activates when temperature conversion value exceeds programmed limit. Several power-on-default limit values are available.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 Simplified Block Diagram Internal Diode LM96163-LLP10 TruTherm or Traditional Diode Bias and Control D+ D- Analog Filter IIR Filter '6 ADC Tachometer Detection SMBDAT Temp Reading, Temp Limit, Hysteresis, and Temp Sensor Filter Registers 2 - Wire Serial Interface SMBCLK TACH TCRIT Comparators ALERT Status and Status Mask Registers and Logic PWM PWM Fan Control Registers PWM Fan Control Typical Application +3.3V +3.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) (3) −0.3 V to 6.0 V Supply Voltage, VDD Voltage on SMBDAT, SMBCLK,ALERT, TCRIT, TACH, PWM Pins −0.5 V to 6.0 V −0.3 V to (VDD + 0.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 DC Electrical Characteristics TEMPERATURE-TO-DIGITAL CONVERTER CHARACTERISTICS The following specifications apply for VDD = 3.0 VDC to 3.6 VDC, and all analog source impedance RS = 50Ω unless otherwise specified in the conditions. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = +25°C; unless otherwise noted. TD is the junction temperature of the remote thermal diode. TJ is the junction temperature of the LM96163.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com AC Electrical Characteristics The following specifications apply for VDD = 3.0 VDC to 3.6 VDC, and all analog source impedance RS = 50Ω unless otherwise specified in the conditions. Boldface limits apply for TA = TMIN to TMAX; all other limits TA= +25°C.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 SMBus Digital Switching Characteristics Unless otherwise noted, these specifications apply for VDD = +3.0 VDC to +3.6 VDC, CL (load capacitance) on output lines = 80 pF. Boldface limits apply for TA = TJ; TMIN ≤ TA ≤ TMAX; all other limits TA = TJ = +25°C, unless otherwise noted. The switching characteristics of the LM96163 fully meet or exceed the published specifications of the SMBus version 2.0.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 8 www.ti.com Pin # Label Circuit 1 TCRIT A 2 VDD B 3 D+ B 4 D- B 5 PWM A 6 GND B 7 ALERT A 8 TACH A 9 SMBDAT A 10 SMBCLK A Pin ESD Protection Structure Circuits PIN D1 SNP GND CIRCUIT A V+ D2 PIN D1 D3 6.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 Typical Performance Characteristics Intel Processor on 45nm, 65nm, or 90 nm Process Thermal Diode Performance Comparison Remote Temperature Reading Sensitivity to Thermal Diode Filter Capacitance, TruTherm Enabled Figure 3. Figure 4. Remote Temperature Reading Sensitivity to Thermal Diode Filter Capacitance, TruTherm Disabled Thermal Diode Capacitor or PCB Leakage Current Effect on Remote Diode Temperature Reading Figure 5. Figure 6.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com FUNCTIONAL DESCRIPTION The LM96163 Remote Diode Temperature Sensor with Integrated Fan Control incorporates a ΔVBE-based temperature sensor utilizing a Local or Remote diode and a 10-bit plus sign ΔΣ ADC (Delta-Sigma Analog-toDigital Converter). The LM96163 includes TruTherm BJT beta compensation technology that allows precision temperature sensing of remote diodes found in sub-micron processes.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 The format of the Remote High limit and T_CRIT limit comparison is programmable. The USF bit found in the Enhanced Configuration register controls whether comparisons use a signed or unsigned format. The temperature format used for Remote High and T_CRIT limit comparisons is +255.875 °C to -256 °C. The three different ALERT modes and TCRIT function will be discussed in the following sections.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com Remote Diode Measurement Voltage Temperature Remote High Limit LM96163 ALERT pin ALERT mask set in response to reading of status register by master End of Temperature conversion Status Register: Remote High Time Figure 9.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 The ALERT output can be disabled by setting the ALERT Mask bit in the Configuration Register. The power-on default is to have the ALERT Mask bit and the ALERT Configuration bit low. Temperature Remote High Limit Remote Diode Measurement ALERT mask set in response to ARA from master Voltage LM96163 ALERT Pin Status Register: Remote High Time Figure 10.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com Table 2. 11-bit, 2's complement (10-bit plus sign) Digital Data Temperature Binary Hex +125°C 0111 1101 0000 0000 7D00h +25°C 0001 1001 0000 0000 1900h +1°C 0000 0001 0000 0000 0100h +0.125°C 0000 0000 0010 0000 0020h 0°C 0000 0000 0000 0000 0000h −0.125°C 1111 1111 1110 0000 FFE0h −1°C 1111 1111 0000 0000 FF00h −25°C 1110 0111 0000 0000 E700h −55°C 1100 1001 0000 0000 C900h Table 3.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 Table 5. 13-bit, unsigned binary (continued) Digital Data Temperature Binary Hex +0.03125°C 0000 0000 0000 1000 0008h 0°C 0000 0000 0000 0000 0000h Local Temperature and Remote T_CRIT setpoint data is represented by an 8-bit, two's complement, word with an LSb equal to 1°C. Table 6.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com In the event that the D+ pin is grounded the Remote Temperature reading is forced to –128.000 °C if signed format is read and 0 °C if unsigned format is read. When the D+ pin is detected as shorted to VDD or floating, the Remote Temperature reading is forced to +127.000 °C if signed format is read and +255.000 °C is unsigned format is read. In addition, the ALERT Status register bit RDFA is set.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 45 LM96163 with Filter Off 43 TEMPERATURE (oC) 41 39 37 35 LM96163 with Filter On 33 31 29 27 25 0 50 100 150 200 SAMPLE NUMBER The filter curves were purposely offset for clarity. Figure 12. Digital Filter Response in a typical Intel processor on a 65 nm or 90 nm process Figure 12 shows the filter in use in a typical Intel processor on a 65/90 nm process system. Note that the two curves have been purposely offset for clarity.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com 2. With both SMBDAT and SMBCLK High, the master can initiate an SMBus start condition with a High to Low transition on the SMBDAT line. The LM96163 will respond properly to an SMBus start condition at any point during the communication. After the start the LM96163 will expect an SMBus Address address byte.
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LM96163 www.ti.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com LM96163 REGISTER MAP IN FUNCTIONAL ORDER The following is a Register Map grouped in Functional Order. Some address locations have been left blank to maintain compatibility with LM86. Addresses in parenthesis are mirrors of named address. Reading or writing either address will access the same 8-bit register.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 Register [HEX] Register Name Read/Write POR Default [HEX] ID AND TEST REGISTERS FE Manufacturer ID Read Only 01 FF Stepping/Die Rev.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com LM96163 DETAILED REGISTER DESCRIPTIONS IN FUNCTIONAL ORDER The following is a Register Map grouped in functional and sequence order. New register addresses have been added to maintain compatibility with the LM63 and LM64 register sets. Addresses in parenthesis are mirrors of named address for backwards compatibility with some older software. Reading or writing either address will access the same 8-bit register.
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LM96163 www.ti.com Address Hex SNAS433D – JUNE 2008 – REVISED MAY 2013 Read/ Write Bits POR Value Name Description 4AHEX FAN PWM AND TACHOMETER CONFIGURATION REGISTER R 4A R/W 7:6 00 [Reserved] 5 1 PWPGM 4 0 PWOP 3 0 PWCLSL 2 0 [Reserved] 1:0 00 TACH1:TACH0 These bits are unused and always read as 0. PWM Programming enable 0: the PWM Value (register 0x4C), the PWM Smoothing (0x45[2:0]) and the Lookup Table (Registers 0x50–0x67) are read-only.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 Address Hex Read/ Write Bits POR Value www.ti.com Name Description 4CHEX PWM VALUE REGISTER 4C Read (Write only if reg 4A bit 5 = 1.) 7:6 00 5:0 0x00 HPWVAL7:HPWV AL6 PWM High Resolution and Low Resolution Values If PWM Program (register 4A, bit 5) = 0 this register is read only, this register reflects the LM96163’s current PWM value from the Lookup Table.
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LM96163 www.ti.com Address Hex SNAS433D – JUNE 2008 – REVISED MAY 2013 Read/ Write 52 Bits POR Value Name Description 7 0 E2T7 6:0 0x7F E2T6:E2T0 Lookup Table Temperature Entry 2 Bit 7 is unused and always set to 0 in the low resolution temperature LUT mode. In the high resolution temperature LUT mode bit 7 in conjunction with bits 6:0 of this register are used to determine the limit temperature that the remote diode temperature is compared to. In high resolution the range is 0°C to 127.5°C.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 Address Hex Read/ Write 58 www.ti.com Bits POR Value Name Description 7 0 E5T7 6:0 0x7F E5T6:E5T0 Lookup Table Temperature Entry 5 Bit 7 is unused and always set to 0 in the low resolution temperature LUT mode. In the high resolution temperature LUT mode bit 7 in conjunction with bits 6:0 of this register are used to determine the limit temperature that the remote diode temperature is compared to. In high resolution the range is 0°C to 127.5°C.
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LM96163 www.ti.com Address Hex SNAS433D – JUNE 2008 – REVISED MAY 2013 Read/ Write 5E Bits POR Value Name Description 7 0 E8T7 6:0 0x7F E8T6:E8T0 Lookup Table Temperature Entry 8 Bit 7 is unused and always set to 0 in the low resolution temperature LUT mode. In the high resolution temperature LUT mode bit 7 in conjunction with bits 6:0 of this register are used to determine the limit temperature that the remote diode temperature is compared to. In high resolution the range is 0°C to 127.5°C.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 Address Hex Read/ Write 64 www.ti.com Bits POR Value Name Description 7 0 E11T7 6:0 0x7F E11T6:E11T0 Lookup Table Temperature Entry 11 Bit 7 is unused and always set to 0 in the low resolution temperature LUT mode. In the high resolution temperature LUT mode bit 7 in conjunction with bits 6:0 of this register are used to determine the limit temperature that the remote diode temperature is compared to. In high resolution the range is 0°C to 127.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 Configuration Register Address Hex Read/ Write Bits POR Value Name Description 03 (09)HEX CONFIGURATION REGISTER 7 R/W 6 0 0 ALERT Mask 0: ALERT interrupts are enabled. 1: ALERT interrupts are masked, and the ALERT pin is always in a high impedance (open) state. ALTMSK Standby 0: the LM96163 is in operational mode, converting, comparing, and updating the PWM output continuously. 1: the LM96163 enters a low power standby mode.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 Address Hex Read/ Write Bits POR Value www.ti.com Name Description 49HEX TACHOMETER LIMIT (MSB) and 48HEX TACHOMETER LIMIT (LSB) REGISTERS 49 48 R/W 7:0 R/W 7:2 R/W 1:0 0xFF 0xFF TACL13:TACL6 TACHL5:TACL0 [Reserved] Tachometer Limit (MSB and LSB) These registers contain the current 14-bit Tachometer Count, representing the period of time between tach pulses.
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LM96163 www.ti.com Address Hex SNAS433D – JUNE 2008 – REVISED MAY 2013 Read/ Write Bits POR Value Name Description 31HEX AND 32HEX UNSIGNED REMOTE DIODE TEMPERATURE REGISTERS 31 32 R R 7:0 N/A RTU12:RTU5 Most Significant Byte of the Unsigned Format Remote Diode Temperature Reading The most significant 8-bits of the unsigned format value, representing the temperature of the remote diode connected to the LM96163.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 Address Hex Read/ Write Bits www.ti.com POR Value Name Description 21HEX T_CRIT HYSTERESIS REGISTER 7 21 R/W 6:0 RTH7 0x0A (10°C) This bit is unused. OK to write 1 or 0. Remote Diode T_CRIT Hysteresis T_CRIT stays activated until the remote diode temperature goes below [(T_CRIT Limit)—(T_CRIT Hysteresis)].
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 ALERT Status and Mask Registers Address Hex Read/ Write Bits POR Value Name Description 02HEX ALERT STATUS REGISTER (8-bits) (All Alarms are latched until read, then cleared if alarm condition was removed at the time of the read.) 7 0x02 0 BUSY Busy 0: the ADC is not converting. 1: the ADC is performing a conversion. This bit does not affect ALERT status.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com Conversion Rate and One-Shot Registers Address Hex Read/ Write Bits POR Value Name Description 04 (0A)HEX CONVERSION RATE REGISTER (8-bits) R 04 (0A) R/W 7:4 3:0 [Reserved] 0x08 These bits are unused and will always be set to 0. CONV3:CONV0 Conversion Rate Sets the conversion rate of the LM96163. 0000 = 0.05 Hz 0001 = 0.1 Hz 0010 = 0.204 Hz 0011 = 0.406 Hz 0100 = 0.813 Hz 0101 = 1.625 Hz 0110 = 3.25 Hz 0111 = 6.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 APPLICATION NOTES FAN CONTROL DUTY CYCLE VS. REGISTER SETTINGS AND FREQUENCY NOTE The following table is true only when the 22.5 kHz PWM frequency high resolution duty cycle is not selected. PWM Freq 4D [4:0] PWM Freq at 1.4 kHz Internal Clock, Hz Actual Duty Cycle, % When 75% is Selected 180.0 703.1 50.0 2 90.00 351.6 75.0 3 60.00 234.4 83.3 6 4 45.00 175.8 75.0 8 5 36.00 140.6 80.0 12 9 6 30.00 117.2 75.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com NOTE The following table is true only when the 22.5 kHz PWM frequency with high resolution duty cycle is selected by setting bit 4 (PHR) of the Enhanced Configuration register (0x45), clearing bit 3 (PWCKSL) of the PWM and RPM Configuration register (0x4A) and setting PWM Frequency (0x4D) register to 0x08.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 100 93.75 87.5 81.25 75 68.75 62.5 56.25 50 43.75 37.5 31.25 25 18.75 12.5 6.25 0 85 (b) With smoothing 12-point LUT Entry PWM DUTY CYCLE (%) PWM DUTY CYCLE (%) (a) Without smoothing PWM Output Transition 90 95 100 105 110 100 93.75 87.5 81.25 75 68.75 62.5 56.25 50 43.75 37.5 31.25 25 18.75 12.5 6.25 0 85 Multiple slopes easily realizable with 12-point LUT Ramp rate control between transitions has 0.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com Register 47 (MSB) is 7HEX = Decimal (7 x 256) = 1792. The total Tach Count, in decimal, is 191 + 1792 = 1983.
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LM96163 www.ti.com • • • • • • • SNAS433D – JUNE 2008 – REVISED MAY 2013 q = 1.6×10−19 Coulombs (the electron charge), T = Absolute Temperature in Kelvin k = 1.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com Calculating Total System Accuracy The voltage seen by the LM96163 also includes the IFRS voltage drop of the series resistance. The non-ideality factor, η, is the only other parameter not accounted for and depends on the diode that is used for measurement. Since ΔVBE is proportional to both η and T, the variations in η cannot be distinguished from variations in temperature.
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LM96163 www.ti.com SNAS433D – JUNE 2008 – REVISED MAY 2013 PCB LAYOUT FOR MINIMIZING NOISE Figure 16. Ideal Diode Trace Layout In a noisy environment, such as a processor mother board, layout considerations are very critical. Noise induced on traces running between the remote temperature diode sensor and the LM96163 can cause temperature conversion errors. Keep in mind that the signal level the LM96163 is trying to measure is in microvolts. The following guidelines should be followed: 1.
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LM96163 SNAS433D – JUNE 2008 – REVISED MAY 2013 www.ti.com REVISION HISTORY Changes from Revision C (May 2013) to Revision D • 42 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant LM96163CISD/NOPB WSON DSC 10 1000 178.0 12.4 3.3 3.3 1.0 8.0 12.0 Q1 LM96163CISDX/NOPB WSON DSC 10 4500 330.0 12.4 3.3 3.3 1.0 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-May-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) LM96163CISD/NOPB WSON DSC 10 1000 210.0 185.0 35.0 LM96163CISDX/NOPB WSON DSC 10 4500 367.0 367.0 35.
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MECHANICAL DATA DSC0010A SDA10A (Rev A) www.ti.
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