MAX6695/MAX6696 19-3183 Rev 3 4/11 Dual Remote/Local Temperature Sensors with SMBus Serial Interface General Description Features The MAX6695/MAX6696 are precise, dual-remote, and Measure One Local and Two Remote local digital temperature sensors. They accurately mea- Temperatures sure the temperature of their own die and two remote 11-Bit, +0.125C Resolution diode-connected transistors, and report the tempera- High Accuracy 1.5C (max) from +60C to +100C ture in digital form on a 2-wire serial interface. The remote diode is typically the emitter-base junction of a (Remote) common-collector PNP on a CPU, FPGA, GPU, or ASIC. ACPI Compliant The 2-wire serial interface accepts standard system Programmable Under/Overtemperature Alarms management bus (SMBus) commands such as Write Programmable Conversion Rate Byte, Read Byte, Send Byte, and Receive Byte to read the temperature data and program the alarm thresholds Three Alarm Outputs: ALERT, OT1, and OT2 and conversion rate. The MAX6695/MAX6696 can func- 2 SMBus/I C-Compatible Interface tion autonomously with a programmable conversion rate, which allows control of supply current and temper- Compatible with 65nm Process Technology ature update rate to match system needs. For conver- (Y Versions) sion rates of 2Hz or less, the temperature is Ordering Information represented as 10 bits + sign with a resolution of +0.125C. When the conversion rate is 4Hz, output data PART TEMP RANGE PIN-PACKAGE is 7 bits + sign with a resolution of +1C. The MAX6695/ MAX6695AUB+ -40C to +125C 10 MAX MAX6696 also include an SMBus timeout feature to enhance system reliability. MAX6695YAUB+ -40C to +125C 10 MAX Remote temperature sensing accuracy is 1.5C be- MAX6696AEE+ -40C to +125C 16 QSOP tween +60C and +100C with no calibration needed. MAX6696YAEE+ -40C to +125C 16 QSOP The MAX6695/MAX6696 measure temperatures from Devices are also available in tape-and-reel packages. Specify -40C to +125C. In addition to the SMBus ALERT out- tape and reel by adding T to the part number when ordering. put, the MAX6695/MAX6696 feature two overtempera- +Denotes a lead(Pb)-free/RoHS-compliant package. ture limit indicators (OT1 and OT2), which are active only while the temperature is above the corresponding Typical Operating Circuit programmable temperature limits. The OT1 and OT2 outputs are typically used for fan control, clock throt- tling, or system shutdown. +3.3V 0.1F 47 The MAX6695 has a fixed SMBus address. The MAX6696 has nine different pin-selectable SMBus 10k addresses. The MAX6695 is available in a 10-pin EACH MAX and the MAX6696 is available in a 16-pin QSOP V CPU CC DXP1 package. Both operate throughout the -40C to +125C SMBDATA DATA temperature range. SMBCLK CLOCK Applications ALERT INTERRUPT MAX6695 TO P Notebook Computers TO CLOCK OT1 DXN THROTTLING Desktop Computers TO SYSTEM OT2 SHUTDOWN Servers Workstations DXP2 GND Test and Measurement Equipment GRAPHICS PROCESSOR Typical Operating Circuits continued at end of data sheet. Pin Configurations appear at end of data sheet. MAX is a registered trademark of Maxim Integrated Products, Inc. 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.Dual Remote/Local Temperature Sensors with SMBus Serial Interface ABSOLUTE MAXIMUM RATINGS V ...........................................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A DXP1, DXP2................................................-0.3V to (V + 0.3V) 10-Pin MAX (derate 6.9mW/C above +70C) ........555.6mW CC DXN ......................................................................-0.3V to +0.8V 16-Pin QSOP (derate 8.3mW/C above +70C) .......666.7mW SMBCLK, SMBDATA, ALERT...................................-0.3V to +6V Operating Temperature Range .........................-40C to +125C RESET, STBY, ADD0, ADD1, OT1, OT2...................-0.3V to +6V Junction Temperature .....................................................+150C SMBDATA Current .................................................1mA to 50mA Storage Temperature Range ............................-65C to +150C DXN Current ......................................................................1mA Lead Temperature (soldering, 10s) ................................+300C Soldering Temperature (reflow) .......................................+260C 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 +3.6V, T = 0C to +125C, unless otherwise noted. Typical values are at V = +3.3V and T = +25C) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 3.0 3.6 V CC Standby Supply Current SMBus static, ADC in idle state 10 A Operating Current Interface inactive, ADC active 0.5 1 mA Conversion rate = 0.125Hz 35 70 Average Operating Current A Conversion rate = 1Hz 250 500 Conversion rate = 4Hz 500 1000 T = +25C to +100C RJ -1.5 +1.5 (T = +45C to +85C) A Remote Temperature Error T = 0C to +125C (T = +25C to +100C) -3.0 +3.0 C RJ A (Note 1) T = -40C to +125C (T = 0C to +125C) -5.0 +5.0 RJ A T = -40C to +125C (T = -40C) +3.0 RJ A T = +45C to +85C -2.0 +2.0 A T = +25C to +100C -3.0 +3.0 A Local Temperature Error C T = 0C to +125C -4.5 +4.5 A T = -40C to +125C +3.0 A T = +45C to +85C -3.8 A T = +25C to +100C -4.0 Local Temperature Error A C (MAX6695Y/MAX6696Y) T = 0C to +125C -4.2 A T = -40C to +125C -4.4 A Power-On Reset Threshold V , falling edge (Note 2) 1.3 1.45 1.6 V CC POR Threshold Hysteresis 500 mV Undervoltage Lockout Threshold UVLO Falling edge of V disables ADC 2.2 2.8 2.95 V CC Undervoltage Lockout Hysteresis 90 mV Channel 1 rate 4Hz, channel 2 / local rate 112.5 125 137.5 2Hz (conversion rate register 05h) Conversion Time ms Channel 1 rate 8Hz, channel 2 / local rate 56.25 62.5 68.75 4Hz (conversion rate register 06h) High level 80 100 120 Remote-Diode Source Current I A RJ Low level 8 10 12 2 MAX6695/MAX6696