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Part: MAX6695AUB
Category:
Sensors
-> Temperature Sensors
Description: Dual Remote/local Temperature Sensors With Smbus Serial Interface <<<>>><<<>>><<<>>><<<>>>precise, Dual-remote, And Local Digital Temperature Sensors. They Accurately Measure The Temperature of TheIR Own Die And Two Remote Diode-connected Transistors, And Report The Temperature in Digital Form on a 2-wire Serial Interface. The Remote Diode is Typically The Emitter-base Junction of a Common-collector PNP on a Cpu, Fpga, Gpu, or Asic.<<<>>>key Features Applications <<<>>>Measure One Local And Two Remote Temperatures <<<>>>11-Bit, 0.125 C Resolution <<<>>>High Accuracy 1.5 C (max) From +60 C to +100 C (Remote) <<<>>>ACPI Compliant <<<>>>Programmable Under/overtemperature Alarms <<<>>>Programmable Conversion Rate <<<>>>Three Alarm Outputs: ALERT-bar, OT1-bar, And OT2-bar <<<>>>SMBus/I2C -compatible Interface <<<>>> Desktop Computers<<<>>><<<>>>notebook Computers<<<>>><<<>>>servers<<<>>><<<>>>test And Measurement Equipment<<<>>><<<>>>workstations
Company: Maxim Integrated Products
Datasheet: Download MAX6695AUB datasheet File size : 373 kB
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Datasheet text preview:
19-3183; Rev 1; 5/04
Dual Remote/Local Temperature Sensors with SMBus Serial Interface
General Description
The MAX6695/MAX6696 are precise, dual-remote, and local digital temperature sensors. They accurately measure the temperature of their own die and two remote diode-connected transistors, and report the temperat u r e in digital form on a 2-wire serial interface. The remote diode is typically the emitter-base junction of a common-collector PNP on a CPU, FPGA, GPU, or ASIC. The 2-wire serial interface accepts standard system management bus (SMBusTM) commands such as Write Byte, Read Byte, Send Byte, and Receive Byte to read the temperature data and program the alarm thresholds and conversion rate. The MAX6695/MAX6696 can function autonomously with a programmable conversion rate, which allows control of supply current and temperature update rate to match system needs. For convers i o n rates of 2Hz or less, the temperature is r e p r e s e n t e d as 10 bits + sign with a resolution of +0.125°C. When the conversion rate is 4Hz, output data is 7 bits + sign with a resolution of +1°C. The MAX6695/ MAX6696 also include an SMBus timeout feature to enhance system reliability. Remote temperature sensing accuracy is ±1.5°C between +60°C and +100°C with no calibration needed. The MAX6695/MAX6696 measure temperatures from -40°C to +125°C. In addition to the SMBus ALERT output, the MAX6695/MAX6696 feature two overtemperature limit indicators (OT1 and OT2), which are active only while the temperature is above the corresponding programmable temperature limits. The OT1 and OT2 outputs are typically used for fan control, clock throttling, or system shutdown. T h e MAX6695 has a fixed SMBus address. The M A X 6 6 9 6 has nine different pin-selectable SMBus a d d r e s s e s . The MAX6695 is available in a 10-pin µMAX® and the MAX6696 is available in a 16-pin QSOP package. Both operate throughout the -40°C to +125°C temperature range. Measure One Local and Two Remote Temperatures 11-Bit, 0.125°C Resolution High Accuracy ±1.5°C (max) from +60°C to +100°C (Remote) ACPI Compliant Programmable Under/Overtemperature Alarms Programmable Conversion Rate Three Alarm Outputs: ALERT, OT1, and OT2 SMBus/ I2CTM-Compatible Interface
Features
MAX6695/MAX6696
Ordering Information
PART MAX6695AUB MAX6696AEE TEMP RANGE -40°C to +125°C -40°C to +125°C PIN-PACKAGE 10 µMAX 16 QSOP
Typical Operating Circuit
0.1µF 47 +3.3V
10k EACH CPU DXP1 VCC SMBDATA SMBCLK DATA CLOCK INTERRUPT TO µP TO CLOCK THROTTLING TO SYSTEM SHUTDOWN
MAX6695
DXN
ALERT OT1 OT2
Applications
Notebook Computers Desktop Computers Servers Workstations Test and Measurement Equipment
SMBus is a trademark of Intel Corp. I2C is a trademark of Philips Corp. Purchase of I2C components from Maxim Integrated Products, Inc., or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.
GRAPHICS PROCESSOR
DXP2
GND
Typical Operating Circuits continued at end of data sheet. Pin Configurations appear at end of data sheet. µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
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For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Dual Remote/Local Temperature Sensors with SMBus Serial Interface MAX6695/MAX6696
ABSOLUTE MAXIMUM RATINGS
VCC .........-0.3V to +6V DXP1, DXP2......-0.3V to (VCC + 0.3V) DXN ....-0.3V to +0.8V SMBCLK, SMBDATA, ALERT ..-0.3V to +6V RESET, STBY, ADD0, ADD1, OT1, OT2 ..........-0.3V to +6V SMBDATA Current .......1mA to 50mA DXN Current ....±1mA Continuous Power Dissipation (TA = +70°C) 10-Pin mMAX (derate 6.9mW/°C above +70°C) .......555.6mW 16-Pin QSOP (derate 8.3mW/°C above +70°C) .......666.7mW Operating Temperature Range .......-40°C to +125°C Junction Temperature .....+150°C Storage Temperature Range ....-65°C to +150°C Lead Temperature (soldering, 10s) ........+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, TA = 0°C to +125°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C)
PARAMETER Supply Voltage Standby Supply Current Operating Current Average Operating Current SYMBOL VCC SMBus static, ADC in idle state Interface inactive, ADC active Conversion rate = 0.125Hz Conversion rate = 1Hz Conversion rate = 4Hz TRJ = +25°C to +100°C (TA = +45°C to +85°C) Remote Temperature Error (Note 1) TRJ = 0°C to +125°C (TA = +25°C to +100°C) TRJ = -40°C to +125°C (TA = 0°C to +125°C) TRJ = -40°C to +125°C (TA = -40°C) TA = +45°C to +85°C Local Temperature Error TA = +25°C to +100°C TA = 0°C to +125°C TA = -40°C to +125°C Power-On Reset Threshold POR Threshold Hysteresis Undervoltage Lockout Threshold Undervoltage Lockout Hysteresis Channel 1 rate 4Hz, channel 2 / local rate 2Hz (conversion rate register 05h) Channel 1 rate 8Hz, channel 2 / local rate 4Hz (conversion rate register 06h) IRJ High level Low level VOL = 0.4V VOH = 3.6V VIL VIH 2.9 112.5 56.25 80 8 UVLO Falling edge of VCC disables ADC 2.2 VCC, falling edge (Note 2) 1.3 -2.0 -3.0 -4.5 +3.0 1.45 500 2.8 90 125 62.5 100 10 137.5 ms 68.75 120 12 6 1 0.3 µA 2.95 1.6 V mV V mV -1.5 -3.0 -5.0 +3.0 +2.0 +3.0 +4.5 °C 0.5 35 250 500 CONDITIONS MIN 3.0 TYP MAX 3.6 10 1 70 500 1000 +1.5 +3.0 +5.0 °C µA UNITS V µA mA
Conversion Time
Remote-Diode Source Current ALERT, OT1, OT2 Output Low Sink Current Output High Leakage Current INPUT PIN, ADD0, ADD1 (MAX6696) Logic Input Low Voltage Logic Input High Voltage
mA µA V V
2
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Dual Remote/Local Temperature Sensors with SMBus Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, TA = 0°C to +125°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C)
PARAMETER Logic Input Low Voltage Logic Input High Voltage Input Leakage Current Logic Input Low Voltage Logic Input High Voltage Input Leakage Current Output Low Sink Current Input Capacitance Serial Clock Frequency Bus Free Time Between STOP and START Condition Repeat START Condition Setup Time START Condition Hold Time STOP Condition Setup Time Clock Low Period Clock High Period Data Setup Time Data Hold Time SMB Rise Time SMB Fall Time SMBus Timeout SYMBOL VIL VIH IL E A K VIL VIH IL E A K IOL CIN fSCL tBUF tSU:STA tHD:STA tSU:STO t LOW t HIGH tSU:DAT tHD:DAT tR tF SMBDATA low period for interface reset 20 30 90% of SMBCLK to 90% of SMBDATA 10% of SMBDATA to 90% of SMBCLK 90% of SMBCLK to 90% of SMBDATA 10% to 10% 90% to 90% 10 4.7 4.7 4 4 4 4.7 250 300 1 300 40 VIN = GND or VCC VOL = 0.6V 5 100 2.1 ±1 6 2.1 -1 +1 0.8 CONDITIONS MIN TYP MAX 0.8 UNITS V V µA V V µA mA pF kHz µs µs µs µs µs µs µs µs µs ns ms INPUT PIN, RESET, STBY (MAX6696)
MAX6695/MAX6696
SMBus INTERFACE (SMBCLK, SMBDATA, STBY)
SMBus-COMPATIBLE TIMING (Figures 4 and 5) (Note 2)
Note 1: Based on diode ideality factor of 1.008. Note 2: Specifications are guaranteed by design, not production tested.
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