MAX6612 19-2546 Rev 0 7/02 High-Slope, Low-Power, Analog Temperature Sensor in an SC70 Package General Description Features The MAX6612 is a low-power precision analog output Optimized for Use with ADCs temperature sensor in a tiny 5-pin SC70 package. The High Temperature-to-Voltage Slope sensitivity of the output voltage to temperature is a high 19.53mV/C. This sensitivity provides superior noise Able to Drive High-Capacitive Loads immunity. The voltage/temperature slope is chosen to Operates Up to +150C provide convenient bit weights when the MAX6612 dri- ves the input of an ADC with a 2.5V or 5V reference. Low Current Consumption (35A max) The MAX6612 provides an analog voltage output propor- No Calibration Required tional to temperature. Accuracy is 1.2C (max) at +25C, 3.0 (max) from T = 0C to +70C, and 5.5C (max) Space-Saving SC70 Package A from T = -10C to +125C. Useful measurements can be A obtained at temperatures as high as +150C. Self-heating Ordering Information effects are negligible due to the low current consumption of the part. PIN- TOP PART TEMP RANGE PACKAGE MARK Unlike many analog temperature sensors, the MAX6612 is stable with large capacitive loads. Any capacitive MAX6612MXK-T -55C to +150C 5 SC70-5 ADG load greater than or equal to 1000pF yields stable oper- ation, providing broad flexibility in board-level design. The operating temperature range varies with the supply voltage, with a higher supply voltage enabling a wider Pin Configuration temperature range. The MAX6612 can be used over a range of -10C to +125C with a supply voltage of 3.3V TOP VIEW or greater. For applications with a supply voltage of 2.4V, the MAX6612 can be used over a temperature A 15 B range of -10C to +70C. MAX6612 Applications 2 GND Base Stations Industrial Equipment OUT34 V CC Home Appliances SC70 Battery Packs Medical Instruments Portable Equipment GPS Equipment Typical Application Circuit V SUPPLY R R PU1 PU2 V V CC DD OUT AIN SDA C S C LOAD MAX6612 MAX1137 SCL GND GND C REF Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.High-Slope, Low-Power, Analog Temperature Sensor in an SC70 Package ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) CC A OUT to GND..................................................-0.3V to V + 0.3V 5-Pin SC70 (derate 3.1mW/C above +70C)..............245mW CC ESD Protection (Human Body)...........................................2000V Operating Temperature Range .........................-55C to +150C Current into Any Pin ............................................................20mA Junction Temperature......................................................+150C Output Short-Circuit Duration.....................................Continuous Storage Temperature Range .............................-65C to +165C Lead Temperature (soldering, 10s) .................................+300C 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 = 2.4V to 5.5V, C = 1000pF, T = -10C to +150C, unless otherwise specified.) CC LOAD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS T = +25C, V = 3.3V -1.2 +1.2 A CC Temperature Error T = +60C to +70C, V = 3.3V -3.0 +3.0 A CC V = 0.4 + (0.01953 T) OUT T = +60C to +100C, V = 3.3V -4.3 +4.3 C A CC -6 2 (2 10 T ) T = -10C to +125C, V = 3.3V -5.5 +5.5 A CC (Notes 1, 2) T = -10C to +150C, V = 5.5V 5 A CC Supply Voltage Range V 2.4 2.3 5.5 V CC Supply Current I No load 35 A Q Output Voltage V T = 0C 400 mV OUT A Sensor Gain (Average Slope) T = -10C to +150C 19.53 mV/C A Capacitive Load No sustained oscillations (Note 3) 1000 pF Turn-On Time C = 1000pF 80 s LOAD Shutdown Current V < 0.8V 1 A CC Supply Sensitivity V = 2.4V to 5.5V 0.5 0.8 C/V CC Load Regulation I = 2A to 100A 0.03 C/A OUT Note 1: 100% production tested at +25C. Guaranteed by design through temperature. Note 2: T is in C. Note 3: Guaranteed by design. Typical Operating Characteristics (V = 3.3V, C = 0.1F, C = 1000pF, unless otherwise specified.) CC S LOAD OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE SUPPLY CURRENT vs. SUPPLY VOLTAGE 3500 25 3000 T = +25C A 20 2500 V = 5.5V CC 15 2000 1500 10 1000 5 500 0 0 -25 0 25 50 75 100 125 150 162 3 4 5 AMBIENT TEMPERATURE (C) SUPPLY VOLTAGE (V) 2 MAX6612 OUTPUT VOLTAGE (mV) MAX6612 toc01 SUPPLY CURRENT ( A) MAX6612 toc02