LM34   
Precision Fahrenheit Temperature Sensor 		Click link to Download

Features
•Calibrated directly in degrees Fahrenheit
•Linear +10.0 mV/°F scale factor
•1.0°F accuracy guaranteed (at +77°F)
•Rated for full -50° to +300°F range
•Suitable for remote applications
•Low cost due to wafer-level trimming
•Operates from 5 to 30 volts
•Less than 90 µA current drain
•Low self-heating, 0.18°F in still air
•Nonlinearity only ±0.5°F typical
•Low-impedance output, 0.4Ohm for 1 mA load

Description

The LM34 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 thus has an advantage over linear temperature sensors calibrated in degrees Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Fahrenheit scaling. The LM34 does not require any external calibration or trimming to provide typical accuracies of ±½°F at room temperature and ±1½°F over a full -50 to +300°F temperature range. Low cost is assured by trimming and calibration at the wafer level. The LM34's low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy. It can be used with single power supplies or with plus and minus supplies. As it draws only 75 µA from its supply, it has very low self-heating, less than 0.2°F in still air. The LM34 is rated to operate over a -50° to +300°F temperature range, while the LM34C is rated for a -40° to +230°F range (0°F with improved accuracy). The LM34 series is available packaged in hermetic TO-46 transistor packages, while the LM34C, LM34CA and LM34D are also available in the plastic TO-92 transistor package. The LM34D is also available in an 8-lead surface mount small outline package. The LM34 is a complement to the LM35 (Centigrade) temperature sensor.
Also Recommended
LM94021▲1.5V Supply, Celsius,4 Selectable Gains
LM94022▲1.5V Supply, Celsius,4 Selectable Gains



MY BRIEFCASE                                     Remove all from My Briefcase 
Click any "Briefcase" icon to add an item

                                              LM34
Drag-Select for Table Reset Graph
Also Recommended
LM94021▲1.5V Supply, Celsius,4 Selectable Gains
LM94022▲1.5V Supply, Celsius,4 Selectable Gains

Typical Application
*click for larger image



Typical Performance
*click for larger image


Paramaters / ValuesLM34 LM94021 LM94022
Temperature Accuracy (+/-)1.11, 0.556 deg C 1.5 deg C 1.5 deg C
Supply Min5 Volt 1.5 Volt 1.5 Volt
Quiescent Current_75 uA 9 uA 5.4 uA
Temperature Min-45.5555, -40, 0 deg C -50 deg C -50 deg C
Temperature Max148.889008, 100, 110 deg C 150 deg C 150 deg C
Sensor Gain10 mV/Deg F -5.5 to -13.6 mV/degC -5.5 to -13.6 mV/degC
Supply Max30 Volt 5.5 Volt 5.5 Volt
Single SupplyNo Yes Yes
Output Impedance0.4 Ohm 8 Ohm 5.2 Ohm
Quiescent Current0.075 mA 0.012 mA 0.0081 mA

Datasheets
TitleSizeDateOther
Language
LM34 Precision Fahrenheit Temperature Sensors251
Kbytes		30-Nov-00日本語


Featured Application Notes
TitleSizeDateOther
Language
AN-460: Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors306
Kbytes		20-Sep-02日本語


More Application Notes
TitleSizeDateOther
Language
AN-1982: Application Note 1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool63
Kbytes		15-Jul-09 
AN-1852: Application Note 1852 Designing With pH Electrodes190
Kbytes		25-Sep-08 

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM34CAZ/NOPB
LM34CAZ

RoHS Status



TO-92		Full production
Lead Time: 12 weeks

Samples
DistributorRegionQty
ARROWWorldwide554
AVNET-EMWorldwide1779
DIGIKEYWorldwide2549
FARNELLEurope and Asia272
FUTUREWorldwide1100
NEWARKAmericas1043
$4.00 each at 1K+ pcsbox
of
1800
LM34CZ/NOPB
LM34CZ

RoHS Status



TO-92		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide480
AVNET-EMWorldwide1770
DIGIKEYWorldwide2402
FARNELLEurope and Asia279
FUTUREWorldwide1100
NEWARKAmericas2662
TAYLORAmericas1390
$3.10 each at 1K+ pcsbox
of
1800
LM34DM/NOPB
LM34DM

RoHS Status



SOIC NARROW		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide99
AVNET-EMWorldwide970
DIGIKEYWorldwide78
FUTUREWorldwide1100
NEWARKAmericas188
$0.92 each at 1K+ pcsrail
of
95
LM34DMX/NOPB
LM34DMX

RoHS Status



SOIC NARROW		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
ARROWWorldwide10000
DIGIKEYWorldwide0
FUTUREWorldwide1100
$0.92 each at 1K+ pcsreel
of
2500
LM34DZ/NOPB
LM34DZ

RoHS Status



TO-92		Full production
Lead Time: 16 weeks

Samples
DistributorRegionQty
ARROWWorldwide874
AVNET-EMWorldwide253
DIGIKEYWorldwide6869
FUTUREWorldwide1100
NEWARKAmericas1032
$0.95 each at 1K+ pcsbox
of
1800
LM34AH/NOPB
LM34AH

RoHS Status



TO-46		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide477
AVNET-EMWorldwide1106
DIGIKEYWorldwide585
FUTUREWorldwide100
$9.90 each at 1K+ pcsbox
of
1000
LM34CAH/NOPB
LM34CAH

RoHS Status



TO-46		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
ARROWWorldwide615
DIGIKEYWorldwide0
FUTUREWorldwide1100
$8.25 each at 1K+ pcsbox
of
1000
LM34DH/NOPB
LM34DH

RoHS Status



TO-46		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
AVNET-EMWorldwide83
DIGIKEYWorldwide0
$5.17 each at 1K+ pcsbox
of
1000

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM34CH
LM34CAH
NATIONAL SEMICONDUCTOR
01 Dec 2009

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LM34CAZ/NOPB
LM34CAZ
TO-9231
1		NA
NA		DetailDownloadN/A
NSXYTT
LM34
CAZ
LM34CZ/NOPB
LM34CZ
TO-9231
1		NA
NA		DetailDownloadN/A
NSXYTT
LM34
CZ
LM34DM/NOPB
LM34DM
SOIC NARROW81
1		260
235		DetailDownloadN/A
NSZXTT
LM34D
M
LM34DMX/NOPB
LM34DMX
SOIC NARROW81
1		260
235		DetailDownloadN/A
NSZXTT
LM34D
M
LM34DZ/NOPB
LM34DZ
TO-9231
1		NA
NA		DetailDownloadN/A
NSXYTT
LM34
DZ
LM34AH/NOPB
LM34AH
TO-4631
1		NA
NA		DetailDownloadN/A
NSXYTTE# LM34AH
LM34CAH/NOPB
LM34CAH
TO-4631
1		NA
NA		DetailDownloadN/A
NSXYTTE# LM34CAH
LM34DH/NOPB
LM34DH
TO-4631
1		NA
NA		DetailDownloadN/A
NSXYTTE# LM34DH

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

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

CAD Symbols and Models
Download LM34 CAD Symbols
 Models
N/A

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM34CAZSLM04404600353250011002356520
LM34CZSLM04404600353250011002356520
LM34DMSLM04404600353250011002356520
LM34DMXSLM04404600353250011002356520
LM34DZSLM04404600353250011002356520

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/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

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

Obsolete Versions
Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM34CH
LM34CAH
NATIONAL SEMICONDUCTOR
01 Dec 2009

[Information as of 9-Feb-2010]