EVALUATION KIT AVAILABLE MAX31730 3-Channel Remote Temperature Sensor General Description Benefits and Features The MAX31730 temperature sensor monitors its own tem- High est Temperature Regis ter Simplifies and Speeds perature and the temperatures of three external diode- Overtemperature Notification connected transistors. The operating supply voltage is Accurate Temperature Measurement Helps Designers from 3.0V to 3.6V. Resistance cancellation compensates Meet Error Budgets for high series resistance in circuit-board traces and the 12-Bit, 0.0625C Resolution external thermal diode, while beta compensation corrects 1C Remote Temperature-Measurement Accuracy for temperature-measurement errors due to low-beta (0C to +100C) sensing transistors. -64C to +150C Remote Temperature-Measurement All temperature channels have programmable temperature Range thresholds. When the measured temperature of a channel Resistance Cancellation for Remote Channels crosses the respective threshold, a status bit is set in Compensation for Low Beta Transistors the thermal status registers and the open-drain THERM Programmable Temperature Thresholds output asserts. A highest temperature register allows the Integration Reduces Cost, Board Area, Power-Supply master to obtain the temperature of the hottest channel. Current, and Slave Address Usage The 2-wire serial interface accepts SMBus protocols One Local and Three Remote Temperature-Sensing (write byte, read byte, send byte, and receive byte) for Channels reading the temperature data and programming the Eight Selectable Slave Addresses temperature thresholds. Any one of eight available slave 2 Flexible SMBus/I C Bus Interfaces to a Variety of addresses can be selected using the address selection Microcontrollers input (ADD), which can be connected to ground or con- nected to a grounded resistor. Ordering Information appears at end of data sheet. The MAX31730 supports 3.0V to 3.6V operation and is specified for a -40C to +125C operating temperature For related parts and recommended products to use with this part, refer range. It is available in a 10-pin MAX and a 12-pin, to www.maximintegrated.com/MAX31730.related. 3mm x 3mm TDFN package. Typical Application Circuits +3.3V +3.3V V VDD DD IC1 DXP1 IC1 DXP1 SCL SCL TO MASTER TO MASTER SDA SDA DXN1 DXN ADD ADD MAX31730 IC2 DXP2 (12 TDFN) IC2 DXP2 MAX31730 (10 MAX) +3.3V +3.3V DXN2 DXP3 DXP3 THERM THERM DXN3 GND GND MAX is a registered trademark of Maxim Integrated Products, Inc. 19-6953 Rev 2 4/15MAX31730 3-Channel Remote Temperature Sensor Absolute Maximum Ratings V , SCL, SDA, THERM, ADD ............................-0.3V to +3.7V Operating Temperature Range ......................... -40C to +125C DD All Other Pins ........................................... -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C DD ESD Protection (All Pins, Human Body Model) ....................2kV Storage Temperature Range ............................ -65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A MAX (derate at 8.8mW/C above +70C) ............707.30mW Soldering Temperature (reflow) .......................................+260C TDFN (derate 24.4mW/C above +70C) ...............1951.2mW 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. Package Thermal Characteristics (Note 1) MAX TDFN Junction-to-Ambient Thermal Resistance ( ) ..... 113.1C/W Junction-to-Ambient Thermal Resistance ( ) .......... 41C/W JA JA Junction-to-Case Thermal Resistance ( ) ............... 36C/W Junction-to-Case Thermal Resistance ( ) .............. 8.5C/W JC JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Recommended Operating Conditions (T = -40C to +125C, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Voltage Supply V (Note 3) 3.0 3.3 3.6 V DD Input Logic 0 V SDA, SCL (Note 3) -0.3 +0.8 V IL Input Logic 1 V SDA, SCL (Note 3) 2.2 V + 0.3 V IH DD compensation disabled 2200 pF C (between DXP and DXN) EXT compensation enabled 200 pF Electrical Characteristics (3.0V V 3.6V, T = -40C to +125C, unless otherwise noted) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Standby (Note 4) 2.5 7 Supply Current I A DD Operating, compensation disabled 700 1200 Temperature Resolution -0.0625 +0.0625 C T = 0C to +70C, A -1 +1 T = 0C to +100C RJ T = 0C to +70C, A Remote Temperature Accuracy -2 +2 C T = +100C to +150C RJ T = -40C to +125C, A -2.5 +2.5 T = -40C to +125C RJ Maxim Integrated 2 www.maximintegrated.com