●Cellular Phones
●GPS Equipment
●Medical Instruments
●Battery Management
●Appliances
●Disk Drives
●Printers
●Fax Machines
●HVAC
General Description
The 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
Benets 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.
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX6613MXK+T -55°C to +130°C 5 SC70 ADJ
MAX6613MXK/V+T -55°C to +130°C 5 SC70 ADJ
GND
OUT
1 5 GNDN.C.
+
MAX6613
SC70
TOP VIEW
2
3 4 VCC
VCC
GND
VOUT
100pF
0.1µF
MICROCONTROLLER
VCC
GND
ADC IN
GND
VCC
MAX6613
MAX6613 Low-Voltage Analog Temperature
Sensor in an SC70 Package
19-2477; Rev 4; 5/15
Pin Conguration
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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temperature-to-Voltage Error
(Notes 2, 3)
VCC = 2.7V, TA = 0°C to +50°C -4 +4
°C
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 Voltage TA = 0°C 1.8455 V
Nonlinearity TA = -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 -11.47 mV/°C
Maximum Output Impedance 0 < IL < 16µA, TA = -55°C to +125°C 160 W
0 < IL < 16µA, TA = +125°C to +130°C 300
Load Regulation 0 < IL < 16µA, TA = -55°C to +125°C -2.5 mV
0 < IL < 16µA, TA = 125°C to 130°C -4.8
Supply Sensitivity (Note 3)
TA = -20°C to +130°C, VCC ≤ 5.5V 1 3.3
mV/VTA = -55°C to -20°C, VCC ≤ 4.5V 1 4.7
TA = -55°C to -20°C, VCC ≤ 5.5V 1
Quiescent Current IQNo load 7.5 13 µA
Capacitive Load No sustained oscillations for capacitive
loads in this range (Note 4) 0 1000 pF
Long-Term Stability TA = room temperature for 1000hr (Note 4) 0.1 °C
Temperature Coefficient of
Supply Current 15 nA/°C
Power-Down Supply Current VCC < 0.8V 0.1 µA
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MAX6613 Low-Voltage Analog Temperature
Sensor in an SC70 Package
DC Electrical Characteristics
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.
Absolute Maximum Ratings
(RL = ∞W, TA = +30°C, unless otherwise noted.)
PIN NAME FUNCTION
1 N.C. No Connection. Must be connected to ground or left unconnected.
2 GND Ground. Should be connected to pin 5. Can be left unconnected, if desired.
3 OUT Voltage Output
4 VCC Supply Voltage. Bypass to GND with a 0.1µF capacitor.
5 GND Ground
STEP RESPONSE FROM +25°C TO +125°C
MAX6613 toc05
1.55V
430mV
1s/div
200mV/div
VOUT
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX6613 toc03
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
5.04.01.0 2.0 3.0
1
2
3
4
5
6
7
8
9
10
0
0 6.0
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
MAX6613 toc02
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.04.03.02.01.0
1.482
1.484
1.486
1.488
1.490
1.492
1.494
1.496
1.498
1.500
1.502
1.504
1.506
1.508
1.510
1.480
0 6.0
OUTPUT VOLTAGE vs. TEMPERATURE
MAX6613 toc01
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
1109580655035205-10-25
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
0.4
-40 125
SUPPLY CURRENT vs. TEMPERATURE
MAX6613 toc04
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
1109565 80-10 5 20 35 50-25
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10.0
5.0
-40 125
VCC = 2.7V
VCC = 5V
VCC = 3.3V
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MAX6613 Low-Voltage Analog Temperature
Sensor in an SC70 Package
Pin Description
Typical Operating Characteristics
Detailed Description
The 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 Function
The 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
Sensors
The 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
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Temperature Error
Based on:
OUT = 1.8639 - 0.0115 x Temp
(Note 4)
VCC = 2.7V, TA = -55°C 0.6 7.9
°C
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
°C
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
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MAX6613 Low-Voltage Analog Temperature
Sensor in an SC70 Package
Applications Information
Sensing Circuit Board and Ambient Temperature
A 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 SC70 X5+1 21-0076 90-0188
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MAX6613 Low-Voltage Analog Temperature
Sensor in an SC70 Package
Package Information
For 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 Information
PROCESS: BiCMOS
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 5/02 Initial release —
1 11/03 Corrected error in equation 4
2 1/06 Updated spec in table 2
3 12/10 Added lead-free and automotive part, style edits 1, 2, 3, 5, 6
4 5/15 Revised Benefits and Features section 1
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2015 Maxim Integrated Products, Inc.
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MAX6613 Low-Voltage Analog Temperature
Sensor in an SC70 Package
Revision History
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
