LM26 - SOT-23, ±3°C Accurate, Factory Preset Thermostat from the PowerWise® Family

Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

Features
Internal comparator with pin programmable 2°C or 10°C hysteresis
No external components required
Open Drain or push-pull digital output; supports CMOS logic levels
Internal temperature sensor with VTEMP output pin
VTEMP output allows after-assembly system testing
Internal voltage reference and DAC for trip-point setting
Currently available in 5-pin SOT-23 plastic package
Excellent power supply noise rejection
UL Recognized Component

Key Specification


Power Supply Voltage 2.7V to 5.5V
Power Supply Current 40µA(max) 20µA(typ)
Hysteresis Temperature 2°C or 10°C(typ)

Temperature Trip Point Accuracy

Temperature Range LM26CIM
−55°C to +110°C ±3°C (max)
+120°C ±4°C (max)

General Description


The LM26 is a precision, single digital-output, low-power thermostat comprised of an internal reference, DAC, temperature sensor and comparator. More...


Applications


Microprocessor Thermal Management
Appliances
Portable Battery Powered Systems
Fan Control
Industrial Process Control
HVAC Systems
Remote Temperature Sensing
Electronic System Protection
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
SetPoint Type Fixed
SetPoint Value -25, 50, 120, 90, 85, 95, 75, 70, 115, 0, 45, 105, 100, 65, 110 deg C
Temperature Accuracy (+/-) 3 deg C
Supply Min 2.7 Volt
Temperature Min -55 deg C
Temperature Max 125 deg C
Quiescent Current_ 40 uA
SetPoint Type Fixed
SetPoint Value -25, 50, 120, 90, 85, 95, 75, 70, 115, 0, 45, 105, 100, 65, 110 deg C
Temperature Accuracy (+/-) 3 deg C
Supply Min 2.7 Volt
Temperature Min -55 deg C
Temperature Max 125 deg C
Quiescent Current_ 40 uA
Comparators 1
Sensor Gain -10.82 mV/Deg C
Remote Diode Thermal Sensors Undefined
Supply Max 5.5 Volt
VtempOutput Impedance 18 Ohm
Reference Output Undefined Volt
Quiescent Current 0.04 mA
Automotive Selection Guide Yes
PowerWise Yes
View Using Catalog

  Also Recommended
LM26LVMore Accurate
LM27Higher Max Temperature.
LM56More Accurate. Resistor Programmable.

Additional Resources


Online Seminars Application Notes (see below)


Block Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM26 SOT-23, ±3°C Accurate, Factory Preset Thermostat 286 Kbytes 31-Jul-08 View Online
Download
LM26 SOT-23, ±3°C Accurate, Factory Preset Thermostat (Japanese)
459 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM26CIM5-DPBSOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TDPB
XTT
6 weeksN/A
LM26CIM5-HHDSOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.40reel
of
1000
THHD
XTT
6 weeks500
LM26CIM5-NPASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TNPA
XTT
8 weeks2000
LM26CIM5-PHASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TPHA
XTT
6 weeks2000
LM26CIM5-RPASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TRPA
XTT
6 weeks2000
LM26CIM5-SHASOT-235STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TSHA
XTT
6 weeks2000
LM26CIM5-SPASOT-235STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TSPA
XTT
8 weeks2000
LM26CIM5-TPASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TTPA
XTT
6 weeks15000
LM26CIM5-VHASOT-235STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TVHA
XTT
6 weeks2500
LM26CIM5-VPASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TVPA
XTT
6 weeks2000
LM26CIM5-XHASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TXHA
XTT
6 weeks2000
LM26CIM5-XPASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TXPA
XTT
6 weeks10000
LM26CIM5-YHASOT-235STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TYHA
XTT
6 weeks3000
LM26CIM5-YPASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TYPA
XTT
12 weeks5000
LM26CIM5-ZHASOT-235NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.43reel
of
1000
TZHA
XTT
6 weeks10000
LM26CIM5X-DPBSOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TDPB
XTT
6 weeksN/A
LM26CIM5X-SPASOT-235STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TSPA
XTT
6 weeksN/A
LM26CIM5X-HHDSOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.40reel
of
3000
THHD
XTT
6 weeks150000
LM26CIM5X-NPASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TNPA
XTT
6 weeks5000
LM26CIM5X-PHASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TPHA
XTT
6 weeks40000
LM26CIM5X-RPASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TRPA
XTT
8 weeks20000
LM26CIM5X-SHASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TSHA
XTT
8 weeksN/A
LM26CIM5X-TPASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TTPA
XTT
6 weeks10000
LM26CIM5X-VHASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TVHA
XTT
6 weeks5000
LM26CIM5X-VPASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TVPA
XTT
6 weeks50000
LM26CIM5X-XHASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TXHA
XTT
8 weeksN/A
LM26CIM5X-XPASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TXPA
XTT
6 weeks25000
LM26CIM5X-YHASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TYHA
XTT
6 weeks10000
LM26CIM5X-YPASOT-235NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TYPA
XTT
6 weeks25000
LM26CIM5X-ZHASOT-235STD
NOPB
1
1
260
260
RoHS Download Full productionN/A
 
Buy Now
1K+$0.43reel
of
3000
TZHA
XTT
6 weeks10000

General Description


The LM26 is a precision, single digital-output, low-power thermostat comprised of an internal reference, DAC, temperature sensor and comparator. Utilizing factory programming, it can be manufactured with different trip points as well as different digital output functionality. The trip point (TOS) can be preset at the factory to any temperature in the range of −55°C to +110°C in 1°C increments. The LM26 has one digital output (OS/ ^OS/US/ ^US), one digital input (HYST) and one analog output (VTEMP). The digital output stage can be preset as either open-drain or push-pull. In addition, it can be factory programmed to be active HIGH or LOW. The digital output can be factory programmed to indicate an over temperature shutdown event (OS or ^OS) or an under temperature shutdown event (US or ^US). When preset as an overtemperature shutdown ( ^OS) it will go LOW to indicate that the die temperature is over the internally preset TOS and go HIGH when the temperature goes below (TOS–THYST). Similarly, when preprogrammed as an undertemperature shutdown (US) it will go HIGH to indicate that the temperature is below TUS and go LOW when the temperature is above (TUS+THYST). The typical hysteresis, THYST, can be set to 2°C or 10°C and is controlled by the state of the HYST pin. A VTEMP analog output provides a voltage that is proportional to temperature and has a −10.82mV/°C output slope.

Available parts are detailed in the ordering information. For other part options, contact a National Semiconductor Distributor or Sales Representative for information on minimum order qualification. The LM26 is currently available in a 5-lead SOT-23 package.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM * LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM26CIM5-DPBCMOS7013906008625005244736730
LM26CIM5-HHDCMOS7013906008625005244736730
LM26CIM5-NPACMOS7013906008625005244736730
LM26CIM5-PHACMOS7013906008625005244736730
LM26CIM5-RPACMOS7013906008625005244736730
LM26CIM5-SHACMOS7013906008625005244736730
LM26CIM5-SPACMOS7013906008625005244736730
LM26CIM5-TPACMOS7013906008625005244736730
LM26CIM5-VHACMOS7013906008625005244736730
LM26CIM5-VPACMOS7013906008625005244736730
LM26CIM5-XHACMOS7013906008625005244736730
LM26CIM5-XPACMOS7013906008625005244736730
LM26CIM5-YHACMOS7013906008625005244736730
LM26CIM5-YPACMOS7013906008625005244736730
LM26CIM5-ZHACMOS7013906008625005244736730
LM26CIM5X-DPBCMOS7013906008625005244736730
LM26CIM5X-HHDCMOS7013906008625005244736730
LM26CIM5X-NPACMOS7013906008625005244736730
LM26CIM5X-PHACMOS7013906008625005244736730
LM26CIM5X-RPACMOS7013906008625005244736730
LM26CIM5X-SHACMOS7013906008625005244736730
LM26CIM5X-SPACMOS7013906008625005244736730
LM26CIM5X-TPACMOS7013906008625005244736730
LM26CIM5X-VHACMOS7013906008625005244736730
LM26CIM5X-VPACMOS7013906008625005244736730
LM26CIM5X-XHACMOS7013906008625005244736730
LM26CIM5X-XPACMOS7013906008625005244736730
LM26CIM5X-YHACMOS7013906008625005244736730
LM26CIM5X-YPACMOS7013906008625005244736730
LM26CIM5X-ZHACMOS7013906008625005244736730

Note: The Early Failure Rates were calculated as point estimates. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1256: Application Note 1256 Tiny Temperature Sensors for Portable Systems 66 Kbytes 1-Oct-02 Download

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[Information as of 7-Jan-2009]