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19-2040; Rev 1; 6/01
Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages
General Description
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 8A supply current over the -20C to +85C temperature range. Accuracy is 0.6C (typ) from T A = +20C to +50C and is 0.7C (typ) from TA = 0C to +70C. The MAX6607/MAX6608 output voltage depends on its die temperature and has a slope of 10mV/C and an offset of 500mV at 0C. o Operate Down to 1.8V Supply o Low Current Consumption (15A max) o Small SC70 and SOT23 Packages o 2.0C (max) Accuracy from +20C to +50C o Optimized to Drive Capacitive Loads Up to 1000pF
Features
MAX6607/MAX6608
________________________Applications
Cellular Phones Battery Packs GPS Equipment Digital Cameras Portable Equipment
PART MAX6607IXK-T MAX6608IUK-T
Ordering Information
TEMP. RANGE -20C to +85C -20C to +85C PIN-PACKAGE 5-SC70-5 5-SOT23-5
Typical Application Circuit
VCC VCC MAX6607 A MAX6608 OUT VCC OUT 1 ADC IN C GND 1nF GND A3 4 VCC N.C. 2 5
Pin Configurations
TOP VIEW
GND
N.C. 1
5
OUT
CS = 0.2F
MAX6607
GND 2
MAX6608
A3
4
VCC
SC70
GND
SOT23
________________________________________________________________ Maxim Integrated Products
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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.
Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages MAX6607/MAX6608
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 = +70C) 5-Pin SC70 (derate 3.1mW/C above +70C) ..............245mW 5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW Operating Temperature Range .........................-55C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C 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
(VCC = +1.8V to +3.6V, CL = 1nF, TA = -20C to +85C, typical values are at TA = +25C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS TA = +20C to +50C Temperature Error VCC = +2.4V TA = 0C to +70C TA = -10C to +85C TA = -20C to -10C Supply Voltage Maximum Rate of Rise of Supply Voltage (Note 2) Supply Current Output Voltage Sensor Gain (Average Slope) Maximum Capacitive Load Load Regulation Line Regulation IOUT = -1.2A to +20A IQ VOUT VCC TA = +70C VCC < 2.8V No load TA = 0C TA = +80C TA = +85C MIN -2.0 -3.5 -5.0 -6.0 1.8 1000 500 100 8 500 10 1 0.15 0.3 0.2 0.9 15 A mV mV/C nF C/A C/V V/s TYP 0.6 0.7 1.0 1.5 MAX +2.0 +3.5 +5.0 +6.0 3.6 V C UNITS
Note 1: All parameters are measured at TA = +25C. Specifications over temperature range are guaranteed by design. Note 2: Not production tested, guaranteed by design.
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Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages
Typical Operating Characteristics
(VCC = +1.8V, CS = 0.1F, CL = 1nF, unless otherwise noted.)
MAX6607/MAX6608
OUTPUT VOLTAGE vs. TEMPERATURE
MAX6607/08 toc01
TEMPERATURE ERROR vs. TEMPERATURE
MAX6607/08 toc02
SUPPLY CURRENT vs. SUPPLY VOLTAGE
TA = +25C 12 SUPPLY CURRENT (A) 10 8 6 4 2 0
MAX6607/08 toc03
1400 1200 OUTPUT VOLTAGE (mV) 1000 800 600 400 200 0 -20 -10 0 10 20 30 40 50 60 70 80 TEMPERATURE (C)
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1.0 TEMPERATURE ERROR (C) 0.6 0.2 -0.2 -0.6 -1.0 -20 -5 10 25 40 55 70
85
0
1
2
3
4
5
TEMPERATURE (C)
SUPPLY VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
MAX6607/08 toc4
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
770 760 OUTPUT VOLTAGE (mV) 750 740 730 720 710 700 0 0 1 2 3 4 5 6 TA = +25C
MAX6607/08 toc05
STEP RESPONSE FROM +25C TO +80C FLOURINERT BATH
MAX6607/08 toc06
12 11 SUPPLY CURRENT (A) VCC = +3.3V 10 9 8 7 6 5 -40 -25 -10 5 20 35 50 65 80 TEMPERATURE (C) VCC = +1.8V
OUT 200mV/div
1s/div
SUPPLY VOLTAGE (V)
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Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages MAX6607/MAX6608
Pin Description
PIN NAME SC70 1 2 3 4 5 SOT23 5 1 3 4 2 OUT N.C. A VCC GND Temperature Sensor Output Not Connected Must be connected to GND. Supply Input. Decouple with a 0.1F capacitor to GND. Ground FUNCTION
Applications Information
Sensing Circuit Board and Ambient Temperatures
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.
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 0C to allow measurement of negative temperatures. The maximum supply current is 15A, and the supply voltage range is from +1.8V to +3.6V for the -20C to +85C 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. Therefore: T (C) = (VOUT - 500mV) / 10mV/C
Chip Information
TRANSISTOR COUNT: 111 PROCESS: BiCMOS
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Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages
Package Information
SC70, 5L.EPS
MAX6607/MAX6608
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Low-Voltage Analog Temperature Sensors in SC70 and SOT23 Packages MAX6607/MAX6608
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 (c) 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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