19-2040; Rev 1; 6/01 Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages The MAX6607/MAX6608 precision, low-voltage, analog output temperature sensors are available in 5-pin SC70 and SOT23 packages. The devices have a +1.8V to +3.6V supply voltage range and 8µA supply current over the -20°C to +85°C temperature range. Accuracy is ±0.6°C (typ) from T A = +20°C to +50°C and is ±0.7°C (typ) from TA = 0°C to +70°C. The MAX6607/MAX6608 output voltage depends on its die temperature and has a slope of 10mV/°C and an offset of 500mV at 0°C. Features ♦ Operate Down to 1.8V Supply ♦ Low Current Consumption (15µA max) ♦ Small SC70 and SOT23 Packages ♦ ±2.0°C (max) Accuracy from +20°C to +50°C ♦ Optimized to Drive Capacitive Loads Up to 1000pF Ordering Information ________________________Applications Cellular Phones Digital Cameras Battery Packs Portable Equipment GPS Equipment TEMP. RANGE PIN-PACKAGE MAX6607IXK-T PART -20°C to +85°C 5-SC70-5 MAX6608IUK-T -20°C to +85°C 5-SOT23-5 Typical Application Circuit Pin Configurations TOP VIEW VCC VCC CS = 0.2µF VCC MAX6607 A MAX6608 OUT OUT 1 ADC IN µC N.C. 2 5 GND MAX6607 N.C. 1 GND 2 5 OUT 4 VCC MAX6608 GND A 3 1nF 4 VCC A 3 GND SC70 SOT23 GND ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX6607/MAX6608 General Description MAX6607/MAX6608 Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages ABSOLUTE MAXIMUM RATINGS VCC to GND ..............................................................-0.3V to +6V OUT, A to GND...........................................-0.3V to (VCC + 0.3V) ESD Protection (Human Body Model) .............................>2000V Current into Any Pin ............................................................10mA Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70°C) 5-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW Operating Temperature Range .........................-55°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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 (VCC = +1.8V to +3.6V, CL = 1nF, TA = -20°C to +85°C, typical values are at TA = +25°C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX -2.0 0.6 +2.0 TA = 0°C to +70°C -3.5 0.7 +3.5 TA = -10°C to +85°C -5.0 1.0 +5.0 TA = -20°C to -10°C -6.0 1.5 +6.0 TA = +20°C to +50°C Temperature Error Supply Voltage VCC = +2.4V VCC Maximum Rate of Rise of Supply Voltage (Note 2) 1.8 VCC < 2.8V 3.6 TA = +70°C 1000 TA = +80°C 500 TA = +85°C 100 °C V V/s Supply Current IQ No load 8 Output Voltage VOUT TA = 0°C 500 mV 10 mV/°C Sensor Gain (Average Slope) Maximum Capacitive Load Load Regulation Line Regulation 15 1 IOUT = -1.2µA to +20µA µA nF 0.15 0.2 °C/µA 0.3 0.9 °C/V Note 1: All parameters are measured at TA = +25°C. Specifications over temperature range are guaranteed by design. Note 2: Not production tested, guaranteed by design. 2 UNITS _______________________________________________________________________________________ Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages 800 600 400 MAX6607/08 toc02 0.6 0.2 -0.2 -0.6 200 0 20 30 40 50 60 70 80 TA = +25°C 12 10 8 6 4 2 -1.0 -20 -10 0 10 14 SUPPLY CURRENT (µA) 1000 1.0 0 -20 -5 10 25 40 55 70 85 0 1 2 3 4 5 TEMPERATURE (°C) TEMPERATURE (°C) SUPPLY VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE OUTPUT VOLTAGE vs. SUPPLY VOLTAGE STEP RESPONSE FROM +25°C TO +80°C FLOURINERT BATH MAX6607/08 toc06 MAX6607/08 toc4 12 11 VCC = +3.3V 9 VCC = +1.8V 8 7 750 730 720 710 5 700 5 20 35 50 TEMPERATURE (°C) 65 80 OUT 200mV/div 740 6 -40 -25 -10 TA = +25°C 760 OUTPUT VOLTAGE (mV) 10 770 MAX6607/08 toc05 OUTPUT VOLTAGE (mV) 1200 TEMPERATURE ERROR (°C) MAX6607/08 toc01 1400 SUPPLY CURRENT (µA) SUPPLY CURRENT vs. SUPPLY VOLTAGE TEMPERATURE ERROR vs. TEMPERATURE MAX6607/08 toc03 OUTPUT VOLTAGE vs. TEMPERATURE 0 0 1 2 3 4 5 6 1s/div SUPPLY VOLTAGE (V) _______________________________________________________________________________________ 3 MAX6607/MAX6608 Typical Operating Characteristics (VCC = +1.8V, CS = 0.1µF, CL = 1nF, unless otherwise noted.) MAX6607/MAX6608 Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages Pin Description Applications Information Sensing Circuit Board and Ambient Temperatures PIN NAME FUNCTION Temperature Sensor Output SC70 SOT23 1 5 OUT 2 1 N.C. 3 3 A Must be connected to GND. 4 4 VCC Supply Input. Decouple with a 0.1µF capacitor to GND. 5 2 GND Ground Not Connected Detailed Description The MAX6607/MAX6608 analog output temperature sensors’ output voltage is a linear function of its die temperature. The slope of the output voltage is 10mV/°C, and there is a 500mV offset at 0°C to allow measurement of negative temperatures. The maximum supply current is 15µA, and the supply voltage range is from +1.8V to +3.6V for the -20°C to +85°C temperature range. Transfer Function The temperature-to-voltage transfer function has an approximately linear positive slope and can be described by the equation: VOUT = 500mV + (T ✕ 10mV/°C) where T is the die temperature of the MAX6607/ MAX6608 in °C. Temperature sensor ICs like the MAX6607/MAX6608 that sense their own die temperatures must be mounted on, or close to, the object whose temperature they are intended to measure. Because there is a good thermal path between the package’s metal leads and the IC die, the MAX6607/MAX6608 can accurately measure the temperature of the circuit board to which it is soldered. If the sensor is intended to measure the temperature of a heat-generating component on the circuit board, it should be mounted as close as possible to that component and should share supply and ground traces (if they are not noisy) with that component where possible. This maximizes the heat transfer from the component to the sensor. The thermal path between the plastic package and the die is not as good as the path through the leads, so the MAX6607/MAX6608, like all temperature sensors in plastic packages, are less sensitive to the temperature of the surrounding air than they are to the temperature of their leads. They can be successfully used to sense ambient temperature if the circuit board is designed to track the ambient temperature. As with any IC, the wiring and circuits must be kept insulated and dry to avoid leakage and corrosion, especially if the part is operated at cold temperatures where condensation can occur. The error introduced by the part self-heating is negligible. Chip Information Therefore: T (°C) = (VOUT - 500mV) / 10mV/°C TRANSISTOR COUNT: 111 PROCESS: BiCMOS 4 _______________________________________________________________________________________ Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages SC70, 5L.EPS _______________________________________________________________________________________ 5 MAX6607/MAX6608 Package Information MAX6607/MAX6608 Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages Package Information (contnued) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.