Features Rated for full −55°C to +130°C range Available in an SC70 and micro SMD package Predictable curvature error Suitable for remote applications 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. 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) Applications Cellular Phones Computers Power Supply Modules Battery Management FAX Machines Printers HVAC Disk Drives Appliances

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

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Parameters / Values	LM20	LM94022	LM94023	LM19
Temperature Accuracy (+/-)	3.5, 5, 2.5 deg C	1.5 deg C	1.5 deg C	2.5 deg C
Supply Min	2.4 Volt	1.5 Volt	1.5 Volt	2.4 Volt
Quiescent Current_	4.5 uA	5.4 uA	8.1 uA	4.5 uA
Temperature Min	-40, -55 deg C	-50 deg C	-50 deg C	-55 deg C
Temperature Max	130, 125 deg C	150 deg C	150 deg C	130 deg C
Sensor Gain	-11.7 mV/Deg C	-5.5 to -13.6 mV/degC	-5.5 or -8.2 mV/degC	-11.7 mV/Deg C
Supply Max	5.5 Volt	5.5 Volt	5.5 Volt	5.5 Volt
Single Supply	Yes	Yes	Yes	Yes
Output Impedance	160 Ohm	5.2 Ohm	4.4 Ohm	160 Ohm
Quiescent Current	0.0045 mA	0.0081 mA	0.0081 mA	0.0045 mA
Automotive	Yes	Yes	Yes	Yes

Datasheets

Title		Size	Date	Other Language
	LM20 2.4V, 10µA, SC70, micro SMD Temperature Sensor	813 Kbytes	17-Aug-11	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1256: Application Note 1256 Tiny Temperature Sensors for Portable Systems	66 Kbytes	1-Oct-02

Other Technical Documents

Title		Type	Date
	Sensing and Monitoring for Control and Protection Seminar	App Note	2003-02-17
	Tiny Temperature Sensors for Portable Systems	App Note	2003-03-06
	Tiny Temperature Sensors for Remote Systems	App Note	2003-02-17

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM20BIM7/NOPB LM20BIM7 RoHS Status	SC-70	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 4675 AVNET-EM Worldwide 51 DIGI-KEY Worldwide 26636 FARNELL Europe and Asia 4235 MOUSER Worldwide 2019 NEWARK Americas 486 RS COMPONENTS Worldwide 500 RSL MICRO Asia Pacific 7000 TAYLOR Americas 4733	$0.38 each at 1K+ pcs	reel of 1000
LM20BIM7X/NOPB LM20BIM7X RoHS Status	SC-70	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 3000 AVNET-EM Worldwide 15000 CEAC Asia Pacific 3000 DIGI-KEY Worldwide 0 MOUSER Worldwide 2864 RSL MICRO Asia Pacific 12000 TAYLOR Americas 32987	$0.38 each at 1K+ pcs	reel of 3000
LM20CIM7/NOPB LM20CIM7 RoHS Status	SC-70	Full production Lead Time: 8 weeks	Distributor Region Qty DIGI-KEY Worldwide 5381 FARNELL Europe and Asia 2327 MOUSER Worldwide 1725 NEWARK Americas 2327 RS COMPONENTS Worldwide 990	$0.32 each at 1K+ pcs	reel of 1000
LM20CIM7X/NOPB LM20CIM7X RoHS Status	SC-70	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 3240 CEAC Asia Pacific 3000 DIGI-KEY Worldwide 0 MOUSER Worldwide 3000 TAYLOR Americas 3240	$0.32 each at 1K+ pcs	reel of 3000
LM20SITL/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 250 AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 0 MOUSER Worldwide 900 TAYLOR Americas 250	$0.32 each at 1K+ pcs	reel of 250
LM20SITLX/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$0.32 each at 1K+ pcs	reel of 3000
LM20BI MDC RoHS Status		Full production Lead Time: N/A	Contact your distributor	CALL	tray of N/A

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM20CI MDC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM20CIM7EP	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM20SIBP	LM20SITL	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM20SIBPX	LM20SITLX	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM20SITP	LM20SITL	NATIONAL SEMICONDUCTOR	28 Oct 2010
LM20SITPX	LM20SITLX	NATIONAL SEMICONDUCTOR	28 Oct 2010

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM20.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM20 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM20C-EVAL	2.4V, 10μA, SC70, micro SMD Temperature Sensor	Full production	Distributor Region Qty DIGI-KEY Worldwide 0	$6.00 each	1
Contents: Evaluation board Data sheet Cover letter Temperature sensor selection guide

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM20S-EVAL	2.4V, 10μA, SC70, micro SMD Temperature Sensor	Full production	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$6.00 each	1
Contents: Evaluation board Data sheet Cover letter Temperature sensor selection guide

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM20BIM7/NOPB LM20BIM7	7.65 7.7	SC-70	5	1 1	260 260	Detail	Download	N/A	T2B XTT
LM20BIM7X/NOPB LM20BIM7X	7.65 7.7	SC-70	5	1 1	260 260	Detail	Download	N/A	T2B XTT
LM20CIM7/NOPB LM20CIM7	7.65 7.7	SC-70	5	1 1	260 260	Detail	Download	N/A	T2C XTT
LM20CIM7X/NOPB LM20CIM7X	7.65 7.7	SC-70	5	1 1	260 260	Detail	Download	N/A	T2C XTT
LM20SITL/NOPB	1.216	MICRO SMD	4	1	260	Detail	Download	N/A	X I
LM20SITLX/NOPB	1.216	MICRO SMD	4	1	260	Detail	Download	N/A	X I
LM20BI MDC	.309	Unpackaged Die				N/A	-

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM20.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM20 is located at RoHS Status.

CAD Symbols and Models Download LM20 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM20BI MDC	CMOS7	0	21301	0	0	1584000	3	449464325
LM20BIM7	CMOS7	0	21301	0	0	1584000	3	449464325
LM20BIM7X	CMOS7	0	21301	0	0	1584000	3	449464325
LM20CIM7	CMOS7	0	21301	0	0	1584000	3	449464325
LM20CIM7X	CMOS7	0	21301	0	0	1584000	3	449464325
LM20SITL	CMOS7	0	21301	0	0	1584000	3	449464325
LM20SITLX	CMOS7	0	21301	0	0	1584000	3	449464325

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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM20.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM20 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM20CI MDC	NONE	NATIONAL SEMICONDUCTOR	03 Dec 2008
LM20CIM7EP	NONE	NATIONAL SEMICONDUCTOR	16 Nov 2008
LM20SIBP	LM20SITL	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM20SIBPX	LM20SITLX	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM20SITP	LM20SITL	NATIONAL SEMICONDUCTOR	28 Oct 2010
LM20SITPX	LM20SITLX	NATIONAL SEMICONDUCTOR	28 Oct 2010