LTC2996 Temperature Sensor with Alert Outputs Fea T Descrip T n Converts Remote or Internal Diode Temperature to The LTC 2996 is a high accuracy temperature sensor Analog Voltage with adjustable overtemperature and undertemperature n Adjustable Overtemperature and Undertemperature thresholds and open drain alert outputs. It converts the Thresholds temperature of an external diode sensor or its own die n Voltage Output Proportional to Temperature temperature to an analog output voltage while rejecting n 1C Remote Temperature Accuracy errors due to noise and series resistance. The measured n 2C Internal Temperature Accuracy temperature is compared against upper and lower limits n Built-In Series Resistance Cancellation set with resistive dividers. If a threshold is exceeded, the n Open Drain Alert Outputs device communicates an alert by pulling low the corre- n 2.25V to 5.5V Supply Voltage spondent open drain logic output. n 1.8V Reference Voltage Output The LTC2996 gives 1C accurate temperature results n 200A Quiescent Current using commonly available NPN or PNP transistors or n 10-Lead 3mm 3mm DFN Package temperature diodes built into modern digital devices. A 1.8V reference output simplifies threshold programming and can be used as an ADC reference input. a T The LTC2996 provides an accurate, low power solution n Temperature Monitoring and Measurement for temperature monitoring in a compact 3mm 3mm n System Thermal Control DFN package. n Network Servers L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Desktop and Notebook Computers Technology Corporation. All other trademarks are the property of their respective owners. n Environmental Monitoring Typical a T Remote Temperature Monitor with Overtemperature V vs Remote PTAT and Undertemperature Thresholds Diode Temperature 2.25V TO 5.5V 1.8 0.1F V 1.8V OT T > 70C CC V OT REF 1.6 TEMPERATURE CONTROL 43k LTC2996 SYSTEM UT T < 20C VTH UT 1.4 36k VTL V 4mV/K PTAT 1.2 + 102k D 470pF MMBT3904 1.0 D GND 2996 TA01a 0.8 75 100 50 25 0 25 50 125 150 REMOTE DIODE TEMPERATURE (C) 2996 TA01b 2996f 1 V (V) PTAT ion pplica ions pplica ion uresLTC2996 a Te Maxi Mu M r a T p in c F T (Notes 1, 2) V .............................................................. 0.3V to 6V CC + D , D , V , V ............................. 0.3V to V + 0.3V PTAT REF CC OT, UT, VTH, VTL ......................................... 0.3V to 6V TOP VIEW Operating Ambient Temperature Range LTC2996C ................................................ 0C to 70C VTH 1 10 OT VTL 2 9 UT LTC2996I .............................................40C to 85C + D 3 11 8 V REF LTC2996H .......................................... 40C to 125C D 4 7 GND Storage Temperature Range .................. 65C to 150C V 5 6 V PTAT CC DD PACKAGE 10-LEAD (3mm 3mm) PLASTIC DFN T = 150C, = 43C/W JMAX JA EXPOSED PAD PCB GROUND CONNECTION OPTIONAL o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC2996CDD PBF LTC2996CDD TRPBF LFQX 10-Lead (3mm 3mm) Plastic QFN 0C to 70C LTC2996IDD PBF LTC2996IDD TRPBF LFQX 10-Lead (3mm 3mm) Plastic QFN 40C to 85C LTC2996HDD PBF LTC2996HDD TRPBF LFQX 40C to 125C 10-Lead (3mm 3mm) Plastic QFN Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are identified by a label on the shipping container. Consult LTC Marketing for information on lead based finish parts. For more information on lead free part marking, go to: