LM20 - 2.4V, 10μA, SC70, micro SMD Temperature Sensor
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
•Rated for full −55°C to +130°C range
•Available in an SC70 and 2 micro SMD packages
•Predictable curvature error
•Suitable for remote applications

Key Specification

■  Accuracy at +30°C ±1.5 to ±4 °C (max)
■  Accuracy at +130°C & −55°C ±2.5 to ±5 °C (max)
■  Power Supply Voltage Range +2.4V to +5.5V
■  Current Drain 10 μA (max)
■  Nonlinearity ±0.4 % (typ)
■  Output Impedance 160 Ω (max)
■  Load Regulation     0 μA < IL< +16 μA −2.5 mV (max)

General Description

The LM20 is a precision analog output CMOS integrated-circuit temperature sensor that operates over a −55°C to +130°C temperature range. More...


Applications

•Cellular Phones
•Computers
•Power Supply Modules
•Battery Management
•FAX Machines
•Printers
•HVAC
•Disk Drives
•Appliances
  Typical Application
click for larger image


ParametersValues
Temperature Accuracy (+/-) 3.5, 5, 2.5 deg C
Supply Min 2.4 Volt
Quiescent Current_ 4.5 uA
Temperature Min -40, -55 deg C
Temperature Max 130, 125 deg C
Sensor Gain -11.7 mV/Deg C
Supply Max 5.5 Volt
Single Supply Yes
Output Impedance 160 Ohm
Quiescent Current 0.0045 mA
Automotive Yes


Typical Performance

click for larger image


  Also Recommended
LM94022▲For Lower Power, Lower Minimum Supply Voltage, And Greater Source Current
LM94023▲Smaller MicroSMD Package (0.8mmx0.8mm), Lower Minimum Voltage (1.5V), Better Accuracy, Greater Outpu
LM19▲3 Pin TO92 Package Option
Additional Resources
Online Seminars
Connection Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM20 2.4V, 10μA, SC70, micro SMD Temperature Sensor 813
Kbytes		 30-Oct-08 Download
LM20 2.4V, 10μA, SC70, micro SMD Temperature Sensor (Japanese)
 451 Kbytes   Download

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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
LM20C-EVAL2.4V, 10µA, SC70, micro SMD Temperature SensorFull productionN/A
 
Buy Now 		1+$6.001-
8 weeksN/A
LM20S-EVAL2.4V, 10µA, SC70, micro SMD Temperature SensorFull productionN/A
 
Buy Now 		1+$6.001-
8 weeksN/A
LM20BIM7SC-705NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.38reel
of
1000		T2B
XTT
8 weeks2000
LM20CIM7SC-705NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
1000		T2C
XTT
8 weeks5000
LM20BIM7XSC-705NOPB
STD		1
1		260
260		RoHS Download Full productionN/A
 
Buy Now 		1K+$0.38reel
of
3000		T2B
XTT
6 weeks7500
LM20CIM7XSC-705NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		T2C
XTT
12 weeks40000
LM20SITLMICRO SMD4NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$0.32reel
of
250		X
I
12 weeksN/A
LM20SITLXMICRO SMD4NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$0.32reel
of
3000		X
I
6 weeksN/A
LM20SITPMICRO SMD4NOPB1260RoHS Download Not recommended for new designs
(as of 28-Feb-06)		N/A
 
Buy Now 		 CALLreel
of
N/A		X
I
16 weeksN/A
LM20BI MDCUnpackaged DieFull productionN/A
  CALLtray
of
N/A		-
N/A20000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM20CI MDC
NONE
NATIONAL SEMICONDUCTOR
03 Dec 2008
LM20CIM7EP
NONE
NATIONAL SEMICONDUCTOR
16 Nov 2008
LM20SIBP
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009
LM20SIBPX
NONE
NATIONAL SEMICONDUCTOR
24 Jul 2009

General Description

The LM20 is a precision analog output CMOS integrated-circuit temperature sensor that operates over a −55°C to +130°C temperature range. The power supply operating range is +2.4 V to +5.5 V. The transfer function of LM20 is predominately linear, yet has a slight predictable parabolic curvature. The accuracy of the LM20 when specified to a parabolic transfer function is ±1.5°C at an ambient temperature of +30°C. The temperature error increases linearly and reaches a maximum of ±2.5°C at the temperature range extremes. The temperature range is affected by the power supply voltage. At a power supply voltage of 2.7 V to 5.5 V the temperature range extremes are +130°C and −55°C. Decreasing the power supply voltage to 2.4 V changes the negative extreme to −30°C, while the positive remains at +130°C.

The LM20's quiescent current is less than 10 μA. Therefore, self-heating is less than 0.02°C in still air. Shutdown capability for the LM20 is intrinsic because its inherent low power consumption allows it to be powered directly from the output of many logic gates or does not necessitate shutdown at all.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM20BI MDCCMOS70184060010890004309006723
LM20BIM7CMOS70184060010890004309006723
LM20BIM7XCMOS70184060010890004309006723
LM20CIM7CMOS70184060010890004309006723
LM20CIM7XCMOS70184060010890004309006723
LM20SITLCMOS70184060010890004309006723
LM20SITLXCMOS70184060010890004309006723
LM20SITPCMOS70184060010890004309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. 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.


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 8-Nov-2009]