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 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 MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

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

Datasheet

Title		Size	Date	Other Language
	LM20 2.4V, 10μA, SC70, micro SMD Temperature Sensor	813 Kbytes	30-Oct-08	日本語

Featured Application Notes

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

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Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
LM20BIM7/NOPB LM20BIM7 RoHS	SC-70	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 0 FARNELL Europe and Asia 4680 FUTURE Worldwide 1100 KEIKONG Asia Pacific 20000 NEWARK Americas 2545 RS COMPONENTS Worldwide 500 TAYLOR Americas 875	$0.38 each at 1K+ pcs	reel of 1000
LM20CIM7/NOPB LM20CIM7 RoHS	SC-70	Full production Lead Time: 8 weeks	Distributor Region Qty DIGIKEY Worldwide 3054 FUTURE Worldwide 1100 NEWARK Americas 335 RS COMPONENTS Worldwide 990	$0.32 each at 1K+ pcs	reel of 1000
LM20BIM7X/NOPB LM20BIM7X RoHS	SC-70	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 2153 DIGIKEY Worldwide 0	$0.38 each at 1K+ pcs	reel of 3000
LM20CIM7X/NOPB RoHS	SC-70	Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 3895 DIGIKEY Worldwide 0 FUTURE Worldwide 1100	$0.32 each at 1K+ pcs	reel of 3000
LM20SITL/NOPB RoHS		Full production Lead Time: 12 weeks	Distributor Region Qty ARROW Worldwide 1000 DIGIKEY Worldwide 0	$0.32 each at 1K+ pcs	reel of 250
LM20SITLX/NOPB RoHS		Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$0.32 each at 1K+ pcs	reel of 3000
LM20SITP/NOPB RoHS		Not recommended for new designs (as of 28-Feb-06) Lead Time: 16 weeks	Contact your distributor	CALL	reel of N/A
LM20BI MDC RoHS		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	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM20SIBPX	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM20BI MDC	CMOS7	0	18406	0	0	1089000	4	309006723
LM20BIM7	CMOS7	0	18406	0	0	1089000	4	309006723
LM20BIM7X	CMOS7	0	18406	0	0	1089000	4	309006723
LM20CIM7	CMOS7	0	18406	0	0	1089000	4	309006723
LM20CIM7X	CMOS7	0	18406	0	0	1089000	4	309006723
LM20SITL	CMOS7	0	18406	0	0	1089000	4	309006723
LM20SITLX	CMOS7	0	18406	0	0	1089000	4	309006723
LM20SITP	CMOS7	0	18406	0	0	1089000	4	309006723

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.

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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	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009
LM20SIBPX	NONE	NATIONAL SEMICONDUCTOR	24 Jul 2009