MAX6698 19-3476 Rev 3 8/07 7-Channel Precision Remote-Diode, Thermistor, and Local Temperature Monitor General Description Features The MAX6698 precision multichannel temperature sen- Three Thermal-Diode Inputs and Three Thermistor sor monitors its own temperature, the temperatures of Inputs three external diode-connected transistors, and the Local Temperature Sensor temperatures of three thermistors. All temperature channels have programmable alert thresholds. 1C Remote Temperature Accuracy (+60C to Channels 1, 4, 5, and 6 also have programmable over- +100C) temperature thresholds. When the measured tempera- Temperature Monitoring Begins at POR for Fail- ture of a channel exceeds the respective threshold, a Safe System Protection status bit is set in one of the status registers. Two open- drain outputs, OVERT and ALERT, assert correspond- ALERT and OVERT Outputs for Interrupts, ing to these bits in the status register. Throttling, and Shutdown The 2-wire serial interface supports the standard system Small 16-Pin QSOP and 16-Pin TSSOP Packages management bus (SMBus) protocols: write byte, read 2-Wire SMBus Interface byte, send byte, and receive byte for reading the tem- perature data and programming the alarm thresholds. Ordering Information The MAX6698 is specified for an operating temperature PIN- PKG range of -40C to +125C and is available in 16-pin PART TEMP RANGE PACKAGE CODE QSOP and 16-pin TSSOP packages. 16 QSOP MAX6698EE -40C to +125C E16-1 Applications 16 TSSOP MAX6698UE -40C to +125C U16-1 Desktop Computers Workstations *See the Slave Address section. Notebook Computers Servers Pin Configuration appears at end of data sheet. Typical Application Circuit +3.3V 1 16 DXP1 GND 2 MAX6698 15 DXN1 SMBCLK 3 14 DXP2 SMBDATA 4 13 DXN2 ALERT 5 12 DXP3 V CC 6 11 DXN3 OVERT 7 10 THER3 THER1 8 9 VREF THER2 R R R EX2 EX1 EX3 R R THER3 THER2 R THER1 SMBus is a trademark of Intel Corp. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE7-Channel Precision Remote-Diode, Thermistor, and Local Temperature Monitor ABSOLUTE MAXIMUM RATINGS 16-Pin TSSOP V , SCL, SDA, ALERT, OVERT to GND ................-0.3V to +6V CC (derate 9.4mW/C above +70C)....................754.7mW(U16-1) DXP to GND..............................................-0.3V to (V + 0.3V) CC DXN to GND ........................................................-0.3V to +0.8V ESD Protection (all pins, Human Body Model)................2000V Operating Temperature Range .........................-40C to +125C THER to GND..........................................................-0.3V to +6V VREF to GND............................................................-0.3V to +6V Junction Temperature......................................................+150C Storage Temperature Range .............................-60C to +150C SDA, ALERT, OVERT Current .............................-1mA to +50mA Lead Temperature (soldering, 10s) .................................+300C DXN Current .......................................................................1mA Continuous Power Dissipation (T = +70C) A 16-Pin QSOP (derate 8.3mW/C above +70C) ......................666.7mW(E16-1) 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 (V = +3.0V to +5.5V, T = -40C to +125C, unless otherwise noted. Typical values are at V = +3.3V and T = +25C.) (Note 1) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 3.0 5.5 V CC Standby Supply Current I SMBus static 30 A SS Operating Current I During conversion 500 1000 A CC Channel 1 only 11 Temperature Resolution Bits Other diode channels 8 T = T = +60C to +100C -1.0 +1.0 A RJ T = T = 0C to +125C -3.0 +3.0 A RJ o Remote Temperature Accuracy V = 3.3V C CC DXN grounded, 2.5 T = T = 0C to +85C RJ A T = +60C to +100C -2.5 +2.5 A o Local Temperature Accuracy V = 3.3V C CC T = 0C to +125C -3.5 +3.5 A Supply Sensitivity of Temperature o 0.2 C/V Accuracy Resistance cancellation on 95 125 156 Remote Channel 1 Conversion t ms CONV1 Time Resistance cancellation off 190 250 312 Remote Channels 2 Through 6 t 95 125 156 ms CONV Conversion Time High level 80 100 120 Remote-Diode Source Current I A RJ Low level 8 10 12 Undervoltage-Lockout Threshold UVLO Falling edge of V disables ADC 2.3 2.80 2.95 V CC Undervoltage-Lockout Hysteresis 90 mV Power-On Reset (POR) Threshold V falling edge 1.2 2.0 2.5 V CC POR Threshold Hysteresis 90 mV THERMISTOR CONVERSION %Full Voltage-Measurement Accuracy -1 +1 scale Conversion Time 31 ms Thermistor Reference Voltage V 1V REF 2 MAX6698