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LM60-Q1
SNIS197 – AUGUST 2017
LM60-Q1 2.7-V, SOT-23 Temperature Sensor
1 Features
3 Description
•
The LM60-Q1 device is a precision integrated-circuit
temperature sensor that can sense a −40°C to
+125°C temperature range while operating from a
single 2.7-V supply. The output voltage of the device
is linearly proportional to Celsius (Centigrade)
temperature (6.25 mV/°C) and has a DC offset of
424 mV. The offset allows reading negative
temperatures without the need for a negative supply.
The nominal output voltage of the device ranges from
174 mV to 1205 mV for a −40°C to +125°C
temperature range. The device is calibrated to
provide accuracies of ±2°C at room temperature and
±3°C over the full −25°C to +125°C temperature
range.
1
•
•
•
•
•
AEC-Q100 Qualified for Automotive Applications
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
– Device HBM ESD Classification Level 2
Calibrated Linear Scale Factor of 6.25 mV/°C
Rated for Full −40°C to +125°C Range
Suitable for Remote Applications
Available in SOT-23 Packages
Key Specifications
– Accuracy at 25°C: ±2°C and ±3°C (Maximum)
– Accuracy for −40°C to +125°C: ±4°C
(Maximum)
– Accuracy for −25°C to +125°C: ±3°C
(Maximum)
– Temperature Slope: 6.25 mV/°C
– Power-Supply Voltage Range: 2.7 V to 10 V
– Current Drain at 25°C: 110 μA (Maximum)
– Nonlinearity: ±0.8°C (Maximum)
– Output Impedance: 800 Ω (Maximum)
The linear output of the device, 424-mV offset, and
factory calibration simplify external circuitry required
in a single supply environment where reading
negative temperatures is required. Because the
quiescent current of the device is less than 110 μA,
self-heating is limited to a very low 0.1°C in still air in
the SOT-23 package. Shutdown capability for the
device is intrinsic because its inherent low power
consumption allows it to be powered directly from the
output of many logic gates.
2 Applications
•
•
•
•
•
•
•
Automotive
Cell Phones and Computers
Power Supply Modules
Battery Management
Fax Machines and Printers
HVAC and Disk Drives
Appliances
Simplified Schematic
Device Information(1)
PART NUMBER
LM60-Q1
PACKAGE
BODY SIZE (NOM)
SOT-23 (3)
2.92 mm × 1.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Full-Range Centigrade Temperature Sensor
(−40°C to +125°C)
1.50
1.205
Output Voltage (V)
1.25
1.00
0.580
0.75
0.50
0.174
0.25
VO = (+6.25 mV/°C × T °C) + 424 mV
0.00
±50
±25
0
25
50
75
DUT Temperature (ƒC)
100
125
150
C001
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
LM60-Q1
SNIS197 – AUGUST 2017
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Table of Contents
1
2
3
4
5
6
7
8
Features ..................................................................
Applications ...........................................................
Description .............................................................
Revision History.....................................................
Device Comparison Table.....................................
Pin Configuration and Functions .........................
Specifications.........................................................
1
1
1
2
3
4
4
7.1
7.2
7.3
7.4
7.5
7.6
4
4
5
5
5
7
Absolute Maximum Ratings ......................................
ESD Ratings..............................................................
Recommended Operating Conditions.......................
Thermal Information ..................................................
Electrical Characteristics...........................................
Typical Characteristics ..............................................
8.4 Device Functional Modes.......................................... 9
9
Application and Implementation ........................ 10
9.1 Application Information............................................ 10
9.2 Typical Applications ................................................ 11
9.3 System Examples ................................................... 13
10 Power Supply Recommendations ..................... 13
11 Layout................................................................... 14
11.1 Layout Guidelines ................................................. 14
11.2 Layout Example .................................................... 14
11.3 Thermal Considerations ........................................ 14
12 Device and Documentation Support ................. 16
12.1
12.2
12.3
12.4
12.5
Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................... 9
Receiving Notification of Documentation Updates
Community Resources..........................................
Trademarks ...........................................................
Electrostatic Discharge Caution ............................
Glossary ................................................................
16
16
16
16
16
13 Mechanical, Packaging, and Orderable
Information ........................................................... 16
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
DATE
August 2017
2
REVISION
NOTES
*
Initial release. Moved the automotive device
from the SNIS119 to a standalone data sheet
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5 Device Comparison Table
ORDER NUMBER
ACCURACY OVER SPECIFIED
TEMPERATURE RANGE
SPECIFIED TEMPERATURE RANGE
LM60BIM3
±3
–25°C ≤ TA ≤ +125°C
±4
–40°C ≤ TA ≤ +125°C
±4
–40°C ≤ TA ≤ +125°C
LM60BIZ
±3
–25°C ≤ TA ≤ +125°C
LM60CIZ
±4
–40°C ≤ TA ≤ +125°C
LM60BIM3X
LM60CIM3
LM60CIM3X
LM60QIM3
LM60QIM3X
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6 Pin Configuration and Functions
DBZ Package
3-Pin SOT-23
Top View
Pin Functions
PIN
NAME
SOT-23
TYPE
GND
3
GND
VOUT
2
O
+VS
1
POWER
DESCRIPTION
Device ground, connected to power supply negative terminal
Temperature sensor analog output
Positive power supply pin
7 Specifications
7.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
MIN
MAX
UNIT
Supply voltage
−0.2
12
V
Output voltage
−0.6
VS + 0.6
V
Output current
10
mA
Input current at any pin (2)
5
mA
125
°C
150
°C
Maximum junction temperature (TJMAX)
−65
Storage temperature (Tstg)
(1)
(2)
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended
Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
When the input voltage (VI) at any pin exceeds power supplies (VI < GND or VI > +VS), the current at that pin should be limited to 5 mA.
7.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
4
Electrostatic discharge (1)
Human-body model (HBM), per AEC Q100-002 (2)
±2500
Machine model (MM)
±250
UNIT
V
The human body model is a 100-pF capacitor discharged through a 1.5-kΩ resistor into each pin. The machine model is a 200-pF
capacitor discharged directly into each pin.
AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
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7.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted) (1)
MIN
MAX
UNIT
LM60-Q1 (TMIN ≤ TA ≤ TMAX)
–40
125
°C
Supply voltage (+VS)
2.7
10
V
(1)
Soldering process must comply with National Semiconductor's Reflow Temperature Profile specifications. Refer to
www.national.com/packaging. Reflow temperature profiles are different for lead-free and non-lead-free packages.
7.4 Thermal Information
LM60-Q1
THERMAL METRIC
(1)
DBZ (SOT-23)
UNIT
3 PINS
RθJA (2)
Junction-to-ambient thermal resistance
266
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
135
°C/W
RθJB
Junction-to-board thermal resistance
59
°C/W
ψJT
Junction-to-top characterization parameter
18
°C/W
ψJB
Junction-to-board characterization parameter
58
°C/W
(1)
(2)
For more information about traditional and new thermal metrics, see the Semiconductor or IC Package Thermal Metrics application
report.
The junction to ambient thermal resistance (RθJA) is specified without a heat sink in still air.
7.5 Electrical Characteristics
Unless otherwise noted, these specifications apply for +VS = 3 VDC and ILOAD = 1 μA. All limits TA = TJ = 25°C unless
otherwise noted.
PARAMETER
Accuracy (3)
TEST CONDITIONS
LM60-Q1
TA = TJ = TMIN
to TMAX
MIN (1)
TYP (2)
MAX (1)
–3
3
–4
4
Output voltage at 0°C
UNIT
°C
424
mV
LM60-Q1
TA = TJ = TMIN
to TMAX
–0.8
±0.8
°C
Sensor gain (average slope)
LM60-Q1
TA = TJ = TMIN
to TMAX
6
6.5
mV/°C
Output impedance
TA = TJ = TMIN to TMAX
800
Ω
Nonlinearity
(4)
3 V ≤ +VS ≤ 10 V
TA = TJ = TMIN
to TMAX
–0.3
0.3
mV/V
2.7 V ≤ +VS ≤ 3.3 V
TA = TJ = TMIN
to TMAX
–2.3
2.3
mV
110
μA
125
μA
Line regulation (5)
82
Quiescent current
2.7 V ≤ +VS ≤ 10 V
Change of quiescent current
2.7 V ≤ +VS ≤ 10 V
TA = TJ = TMIN
to TMAX
Temperature coefficient of
quiescent current
(1)
(2)
(3)
(4)
(5)
±5
μA
0.2
μA/°C
Limits are specified to TI's AOQL (Average Outgoing Quality Level).
Typicals are at TJ = TA = 25°C and represent most likely parametric norm.
Accuracy is defined as the error between the output voltage and 6.25 mV/°C times the case temperature of the device plus 424 mV, at
specified conditions of voltage, current, and temperature (expressed in °C).
Nonlinearity is defined as the deviation of the output-voltage-versus-temperature curve from the best-fit straight line, over the rated
temperature range of the device.
Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output due to heating
effects can be computed by multiplying the internal dissipation by the thermal resistance.
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Electrical Characteristics (continued)
Unless otherwise noted, these specifications apply for +VS = 3 VDC and ILOAD = 1 μA. All limits TA = TJ = 25°C unless
otherwise noted.
PARAMETER
Long-term stability (6)
(6)
6
TEST CONDITIONS
TJ = TMAX = 125°C
for 1000 hours
MIN (1)
TYP (2)
±0.2
MAX (1)
UNIT
°C
For best long-term stability, any precision circuit will give best results if the unit is aged at a warm temperature, temperature cycled for at
least 46 hours before long-term life test begins for both temperatures. This is especially true when a small (surface-mount) part is wavesoldered; allow time for stress relaxation to occur. The majority of the drift will occur in the first 1000 hours at elevated temperatures.
The drift after 1000 hours will not continue at the first 1000 hour rate.
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7.6 Typical Characteristics
To generate these curves, the device was mounted to a printed-circuit board as shown in Figure 20.
Figure 1. Thermal Resistance Junction to Air
Figure 2. Thermal Time Constant
Figure 3. Thermal Response in Still Air With Heat Sink
Figure 4. Thermal Response in Stirred Oil Bath With Heat
Sink
0
Figure 5. Thermal Response in Still Air Without a Heat Sink
Figure 6. Start-Up Voltage vs Temperature
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Typical Characteristics (continued)
To generate these curves, the device was mounted to a printed-circuit board as shown in Figure 20.
Figure 7. Quiescent Current vs Temperature
Figure 8. Accuracy vs Temperature
Figure 9. Noise Voltage
Figure 10. Supply Voltage vs Supply Current
SVA-1268122
Figure 11. Start-Up Response
8
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8 Detailed Description
8.1 Overview
TheLM60-Q1 devices are precision analog bipolar temperature sensors that can sense a −40°C to +125°C
temperature range while operating from a single 2.7-V supply. The output voltage of the LM60-Q1 is linearly
proportional to Celsius (Centigrade) temperature (6.25 mV/°C) and has a DC offset of 424 mV. The offset allows
reading negative temperatures with a single positive supply. The nominal output voltage of the device ranges
from 174 mV to 1205 mV for a −40°C to +125°C temperature range. The device is calibrated to provide
accuracies of ±2.0°C at room temperature and ±3°C over the full −25°C to +125°C temperature range.
With a quiescent current of the device is less than 110 μA, self-heating is limited to a very low 0.1°C in still air in
the SOT-23 package. Shutdown capability for the device is intrinsic because its inherent low power consumption
allows it to be powered directly from the output of many logic gates.
The output of the LM60-Q1 is a Class A base emitter follower, thus the LM60-Q1 can source quite a bit of current
while sinking less than 1 µA. In any event load current should be minimized in order to limit it's contribution to the
total temperature error. The temperature-sensing element is based on a delta VBE topology of two transistors (Q1
and Q2 in Functional Block Diagram) that are sized with a 10:1 area ratio.
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 LM60 Transfer Function
The LM60 follows a simple linear transfer function to achieve the accuracy as listed in Electrical Characteristics
as given:
VO = (6.25 mV/°C × T °C) + 424 mV
where
•
•
T is the temperature
VO is the LM60-Q1 output voltage
(1)
8.4 Device Functional Modes
The only functional mode for this device is an analog output directly proportional to temperature.
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9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The device has a low supply current and a wide supply range, therefore it can easily be driven by a battery.
9.1.1 Capacitive Loads
The device handles capacitive loading well. Without any special precautions, the device can drive any capacitive
load as shown in Figure 12. Over the specified temperature range the device has a maximum output impedance
of 800 Ω. In an extremely noisy environment, adding some filtering to minimize noise pick-up may be required. TI
recommends that 0.1 μF be added from +VS to GND to bypass the power supply voltage, as shown in Figure 13.
In a noisy environment, adding a capacitor from the output to ground may be required. A 1-μF output capacitor
with the 800-Ω output impedance forms a 199-Hz, low-pass filter. Because the thermal time constant of the
device is much slower than the 6.3-ms time constant formed by the RC, the overall response time of the device
is not be significantly affected. For much larger capacitors, this additional time lag increases the overall response
time of the device.
TI Device
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Figure 12. No Decoupling Required for Capacitive Load
Figure 13. Filter Added for Noisy Environment
10
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9.2 Typical Applications
9.2.1 Full-Range Centigrade Temperature Sensor
Because the LM60-Q1 is a simple temperature sensor that provides an analog output, design requirements
related to the layout are also important. Refer to Layout for details.
VO = (6.25 mV/°C × T°C) + 424 mV
Figure 14. Full-Range Centigrade Temperature Sensor (−40°C to +125°C)
Operating From a Single Li-Ion Battery Cell
9.2.1.1 Design Requirements
For this design example, use the design parameters listed in Table 1.
Table 1. Temperature and Typical VO Values of
Figure 14
TEMPERATURE (T)
TYPICAL VO
125°C
1205 mV
100°C
1049 mV
25°C
580 mV
0°C
424 mV
–25°C
268 mV
–40°C
174 mV
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9.2.1.2 Detailed Design Procedure
Selection of the LM60-Q1 is based on the output voltage transfer function being able to meet the needs of the
rest of the system.
9.2.1.3 Application Curve
1.50
1.205
Output Voltage (V)
1.25
1.00
0.580
0.75
0.50
0.174
0.25
VO = (+6.25 mV/°C × T °C) + 424 mV
0.00
±50
±25
0
25
50
75
100
125
DUT Temperature (ƒC)
150
C001
Figure 15. LM60-Q1 Output Transfer Function
9.2.2 Centigrade Thermostat Application
V+
R3
R4
TI Device
V+
VT
R1
4.1V
U3
0.1 PF
TI Device
R2
(High = overtemp alarm)
+
U1
-
VOUT
LM7211
VTemp
U2
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Figure 16. Centigrade Thermostat
9.2.2.1 Design Requirements
A simple thermostat can be created by using a reference (LM4040) and a comparator (LM7211) as shown in
Figure 16.
9.2.2.2 Detailed Design Procedure
Use Equation 2 and Equation 3 to calculate the threshold values for T1 and T2.
(4.1)R2
R2 + R1||R3
(2)
(4.1)R2||R3
VT2 =
R1 + R2||R3
(3)
VT1 =
12
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9.2.2.3 Application Curve
VTEMP
VT1
VT2
VOUT
Figure 17. Thermostat Output Waveform
9.3 System Examples
9.3.1 Conserving Power Dissipation With Shutdown
The LM60-Q1 draws very little power, therefore it can simply be shutdown by driving the LM60-Q1 supply pin
with the output of a logic gate as shown in Figure 18.
Figure 18. Conserving Power Dissipation With Shutdown
10 Power Supply Recommendations
In an extremely noisy environment, add some filtering to minimize noise pick-up. Adding 0.1 μF from +VS to GND
is recommended to bypass the power supply voltage, as shown in Figure 13. In a noisy environment, add a
capacitor from the output to ground.
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11 Layout
11.1 Layout Guidelines
The LM60-Q1 can be applied easily in the same way as other integrated-circuit temperature sensors. It can be
glued or cemented to a surface. The temperature that the LM60-Q1 is sensing will be within about +0.1°C of the
surface temperature that the leads of th LM60-Q1 are attached to.
This presumes that the ambient air temperature is almost the same as the surface temperature. If the air
temperature were much higher or lower than the surface temperature, the actual temperature of the device die
would be at an intermediate temperature between the surface temperature and the air temperature.
To ensure good thermal conductivity the backside of the device die is directly attached to the GND pin. The lands
and traces to the device will, of course, be part of the printed-circuit board, which is the object whose
temperature is being measured. These printed-circuit board lands and traces do not cause the temperature of the
device to deviate from the desired temperature.
Alternatively, the device can be mounted inside a sealed-end metal tube, and can then be dipped into a bath or
screwed into a threaded hole in a tank. As with any IC, the device and accompanying wiring and circuits must be
kept insulated and dry to avoid leakage and corrosion. Specifically when the device operates at cold
temperatures where condensation can occur. Printed-circuit coatings and varnishes such as a conformal coating
and epoxy paints or dips are often used to ensure that moisture cannot corrode the device or connections.
11.2 Layout Example
+VS
1
3
VO
GND
2
Via to ground plane
Via to power plane
1/2-inch square printed circuit board with 2-oz. copper foil or similar.
Figure 19. PCB Layout
11.3 Thermal Considerations
The thermal resistance junction to ambient (RθJA) is the parameter used to calculate the rise of a device junction
temperature due to the device power dissipation. Use Equation 4 to calculate the rise in the die temperature of
the device.
TJ = TA + RθJA [(+VS IQ) + (+VS − VO) IL]
where
•
•
14
IQ is the quiescent current
IL is the load current on the output
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Thermal Considerations (continued)
Table 2 summarizes the rise in die temperature of the LM60-Q1 without any loading, and the thermal resistance
for different conditions. The values in Table 2 were actually measured where as the values shown in where
calculated using modeling methods as described in the Semiconductor and IC Package Thermal Metrics
(SPRA953) application report.
Table 2. Temperature Rise of LM60-Q1 Due to Self-Heating and Thermal Resistance (RθJA)
SOT-23 (1)
NO HEAT SINK
Still air
Moving air
(1)
(2)
(3)
SOT-23 (2)
SMALL HEAT FIN
TO-92 (1)
NO HEAT FIN
TO-92 (3)
SMALL HEAT FIN
RθJA
TJ − TA
RθJA
TJ − TA
RθJA
TJ − TA
RθJA
TJ − TA
(°C/W)
(°C)
(°C/W)
(°C)
(°C/W)
(°C)
(°C/W)
(°C)
450
0.17
260
0.1
180
0.07
140
0.05
—
—
180
0.07
90
0.034
70
0.026
Part soldered to 30 gauge wire.
Heat sink used is 1/2-in square printed-circuit board with 2-oz. foil with part attached as shown in Figure 20.
Part glued or leads soldered to 1-in square of 1/16-in printed-circuit board with 2-oz. foil or similar.
Ground Plane
on 062 copper
clad board.
LM60/LM60-Q1
1/2"
1/2"
1/2-in Square Printed-Circuit Board with 2-oz. Copper Foil or Similar.
Figure 20. Printed-Circuit Board Used for Heat Sink to Generate Thermal Response Curves
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12 Device and Documentation Support
12.1 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
12.2 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
12.3 Trademarks
E2E is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
12.4 Electrostatic Discharge Caution
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
12.5 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
13 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
16
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PACKAGE OPTION ADDENDUM
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10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
LM60QIM3/NOPB
ACTIVE
SOT-23
DBZ
3
1000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 125
L60Q
LM60QIM3X/NOPB
ACTIVE
SOT-23
DBZ
3
3000
RoHS & Green
SN
Level-1-260C-UNLIM
-40 to 125
L60Q
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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