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MAX6613MXK+T
Low-Voltage Analog Temperature Sensor in an SC70 Package
●Cellular Phones●GPS Equipment●Medical Instruments●Battery Management●Appliances●Disk Drives●Printers●Fax Machines●HVAC
General DescriptionThe MAX6613 is a low-power precision analog output
temperature sensor in a tiny 5-pin SC70 package. The
MAX6613 operates over a 1.8V to 5.5V supply voltage
range, with a typical current consumption of only 7.5µA. It
is particularly well suited for portable applications where
minimizing battery cost and maximizing useful battery life
are crucial.
The MAX6613 provides an analog voltage output pro-
portional to temperature. Accuracy is ±4.0°C (max)
over a range of TA = 0°C to +50°C and ±4.4°C (max)
from TA = -20°C to +80°C. Self-heating effects are neg-
ligible due to the low current consumption of the part.
Unlike many analog temperature sensors, the MAX6613
is stable with any capacitive load from 0pF to 1000pF,
providing broad flexibility in board-level design.
The operating temperature range varies with the volt-
age supply. The MAX6613 can be used over a -55°C to
+130°C range with a 2.5V to 5.5V supply voltage.
For applications with a supply voltage of 1.8V, the
MAX6613 can be used over a +25°C to +130°C tempera-
ture range.
Applications
Beneits and Features●Minimizes Power Consumption with Ultra-Low 7.5µA
(typ) Supply Current●Minimizes Board Space with Tiny SC70 Package●Extends Performance Range with Wide 1.8V to 5.5V
Operating Range●Ideal for Broad Range of Thermal Management
Applications -55°C to +130°C Measurement Range 4.0°C Accuracy●Pin Compatible with LM20
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
PARTTEMP RANGEPIN-
PACKAGE
TOP
MARKMAX6613MXK+T-55°C to +130°C5 SC70ADJ
MAX6613MXK/V+T-55°C to +130°C5 SC70ADJ
GND
OUT5GNDN.C.
MAX6613
SC70TOP VIEW4VCC
VCC
GND
VOUT
100pF
0.1µF
MICROCONTROLLER
VCC
GND
ADC IN
GND
VCC
MAX6613
MAX6613Low-Voltage Analog Temperature
Sensor in an SC70 Package
Pin Coniguration
Ordering Information
Typical Application Circuit
(All voltages referenced to GND, unless otherwise noted.)
VCC to GND ............................................................-0.3V to +6V
All Other Pins to GND ..............................-0.3V to (VCC + 0.3V)
OUT Short to GND ....................................................Continuous
Output Current ....................................................-1mA to +50mA
ESD Protection (Human Body Model)...............................2000V
Continuous Power Dissipation (TA = +70°C)5-Pin SC70 (derate 3.1mW/°C above +70°C) ..........246.9mW
Operating Temperature Range .........................-55°C to +130°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
Soldering Temperature (reflow) .......................................+260°C
(VCC = 1.8V to 5.5V, TA = -55°C to +130°C. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSTemperature-to-Voltage Error
(Notes 2, 3)
VCC = 2.7V, TA = 0°C to +50°C-4+4
VCC = 2.7V, TA = -20°C to +85°C-4.4+4.4
VCC = 2.7V, TA = -55°C to +100°C-4.5+4.5
VCC = 2.7V, TA = +100°C to +125°C-4.7+4.7
VCC = 2.7V, TA = +125°C to +130°C-5+5
Output VoltageTA = 0°C1.8455V
NonlinearityTA = -55°C to +100°C±0.4%
Sensor Gain (Temperature
Sensitivity or Average Slope)TA = -20°C to +100°C (Note 3)-10.98-11.23-11.47mV/°C
Maximum Output Impedance0 < IL < 16µA, TA = -55°C to +125°C160W0 < IL < 16µA, TA = +125°C to +130°C300
Load Regulation
0 < IL < 16µA, TA = -55°C to +125°C-2.50 < IL < 16µA, TA = 125°C to 130°C-4.8
Supply Sensitivity (Note 3)
TA = -20°C to +130°C, VCC ≤ 5.5V13.3
mV/VTA = -55°C to -20°C, VCC ≤ 4.5V14.7
TA = -55°C to -20°C, VCC ≤ 5.5V1
Quiescent CurrentIQNo load7.513µA
Capacitive LoadNo sustained oscillations for capacitive
loads in this range (Note 4)01000pF
Long-Term StabilityTA = room temperature for 1000hr (Note 4)0.1°C
Temperature Coefficient of
Supply Current15nA/°C
Power-Down Supply CurrentVCC < 0.8V0.1µA
MAX6613Low-Voltage Analog Temperature
Sensor in an SC70 Package
DC Electrical CharacteristicsStresses 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.
Absolute Maximum Ratings
(RL = ∞W, TA = +30°C, unless otherwise noted.)
PINNAMEFUNCTIONN.C.No Connection. Must be connected to ground or left unconnected.GNDGround. Should be connected to pin 5. Can be left unconnected, if desired.OUTVoltage OutputVCCSupply Voltage. Bypass to GND with a 0.1µF capacitor.GNDGround
STEP RESPONSE FROM +25°C TO +125°CMAX6613 toc05
1.55V
430mV
1s/div
200mV/div
VOUT
SUPPLY CURRENT vs. SUPPLY VOLTAGEMAX6613 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
MAX6613 toc02
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE vs. TEMPERATURE
MAX6613 toc01
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
MAX6613 toc04
TEMPERATURE (°C)
SUPPLY CURRENT (
VCC = 2.7V
VCC = 5V
VCC = 3.3V
MAX6613Low-Voltage Analog Temperature
Sensor in an SC70 Package
Pin Description
Typical Operating Characteristics
Detailed DescriptionThe MAX6613 analog output temperature sensor’s out-
put voltage is a discrete function of its die temperature.
The maximum supply current is 13µA, and the supply
voltage range is from 2.5V to 5.5V for the -55°C to
+130°C temperature range, or 1.8V to 5.5V for the
+25°C to +130°C temperature range.
Transfer FunctionThe temperature-to-voltage transfer function is approx-
imately linear and can be described by the quadratic
equation:
VOUT = -0.0000022 5 T2 - 0.01105 × T + 1.8455V
In many cases, a linear approximation can be applied:
VOUT = -0.01123 × T + 1.8455V
where T is the die temperature of the MAX6613 in °C.
Therefore:
T = (1.8455 - VOUT)/0.01123V
Compatibility with Other Temperature
SensorsThe MAX6613 can be used to replace temperature
sensors using other output algorithms. Table 1 provides
information for a linear and quadratic output equation.
Contact the factory for performance information about
another equation.
Table 1. Linear and Quadratic Output Equation
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSTemperature Error
Based on:
OUT = 1.8639 - 0.0115 x Temp
(Note 4)
VCC = 2.7V, TA = -55°C0.67.9
VCC = 2.7V, TA = -20°C-0.4+5.8
VCC = 2.7V, TA = 0°C-0.9+4.5
VCC = 2.7V, TA = +50°C-2.6+3.0
VCC = 2.7V, TA = +85°C-3.6+3.5
VCC = 2.7V, TA = +100°C-4.0+3.7
VCC = 2.7V, TA = +125°C-4.8+4.2
VCC = 2.7V, TA = +130°C-5.1+4.2
Temperature Error
Based on:
OUT = 1.8639 - 0.0115 x Temp -
0.00000388 x Temp2 (Note 4)
VCC = 2.7V, TA = -55°C-0.4+6.9
VCC = 2.7V, TA = -20°C-0.6+5.7
VCC = 2.7V, TA = 0°C-0.9+4.5
VCC = 2.7V, TA = +50°C-3.5+2.1
VCC = 2.7V, TA = +85°C-6.1+1.0
VCC = 2.7V, TA = +100°C-7.4+0.4
VCC = 2.7V, TA = +125°C-10.1-1.0
VCC = 2.7V, TA = +130°C-10.8-1.5
MAX6613Low-Voltage Analog Temperature
Sensor in an SC70 Package
Applications Information
Sensing Circuit Board and Ambient TemperatureA temperature sensor IC like the MAX6613 that senses
its own die temperature must be mounted on, or close
to, the object whose temperature it is intended to mea-
sure. Because there is a good thermal path between the
package’s metal lead and the IC die, the MAX6613 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 optimizes the thermal connection 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 lead, so the
MAX6613, like all temperature sensors in plastic packag-
es, is less sensitive to the temperature of the surrounding
air than to the temperature of its leads. It can be suc-
cessfully 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 insu-
lated and dry to avoid leakage and corrosion, especially if
the part is operated at cold temperatures where conden-
sation can occur.
The change in die temperature introduced by the part due
to self-heating is negligible.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.5 SC70X5+1
21-007690-0188MAX6613Low-Voltage Analog Temperature
Sensor in an SC70 Package
Package InformationFor the latest package outline information and land pat-
terns (footprints), go to
www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show
a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
Chip InformationPROCESS: BiCMOS
REVISION
NUMBER
REVISION
DATEDESCRIPTIONPAGES
CHANGED5/02Initial release—11/03Corrected error in equation41/06Updated spec in table212/10Added lead-free and automotive part, style edits1, 2, 3, 5, 65/15Revised Benefits and Features section1
MAX6613Low-Voltage Analog Temperature
Sensor in an SC70 Package
Revision HistoryFor pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
