Product details

Local sensor accuracy (max) 0.556, 1.111 Operating temperature range (°C) -45 to 148 Supply voltage (min) (V) 5 Supply voltage (max) (V) 30 Supply current (max) (µA) 160 Interface type Analog output Sensor gain (mV/°C) 18 Rating Catalog
Local sensor accuracy (max) 0.556, 1.111 Operating temperature range (°C) -45 to 148 Supply voltage (min) (V) 5 Supply voltage (max) (V) 30 Supply current (max) (µA) 160 Interface type Analog output Sensor gain (mV/°C) 18 Rating Catalog
SOIC (D) 8 29.4 mm² 4.9 x 6 TO-92 (LP) 3 19.136 mm² 5.2 x 3.68 TO-CAN (NDV) 3 34.8704 mm² 6.41 x 5.44
  • Calibrated Directly in Degrees Fahrenheit
  • Linear 10.0 mV/°F Scale Factor
  • 1.0°F Accuracy Assured (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, 0.4 Ω for 1-mA Load
  • Calibrated Directly in Degrees Fahrenheit
  • Linear 10.0 mV/°F Scale Factor
  • 1.0°F Accuracy Assured (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, 0.4 Ω for 1-mA Load

The LM34 series devices are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 device has an advantage over linear temperature sensors calibrated in degrees Kelvin, because the user is not required to subtract a large constant voltage from its output to obtain convenient Fahrenheit scaling. The LM34 device does not require any external calibration or trimming to provide typical accuracies of ±1/2°F at room temperature and ±1-1⁄2°F over a full −50°F to 300°F temperature range. Lower cost is assured by trimming and calibration at the wafer level. The low output impedance, linear output, and precise inherent calibration of the LM34 device makes interfacing to readout or control circuitry especially easy. It can be used with single power supplies or with plus and minus supplies. Because the LM34 device draws only 75 µA from its supply, the device has very low self-heating, less than 0.2°F in still air.

The LM34 device is rated to operate over a −50°F to 300°F temperature range, while the LM34C is rated for a −40°F to 230°F range (0°F with improved accuracy). The LM34 devices are series is available packaged in hermetic TO-46 transistor packages; while the LM34C, LM34CA, and LM34D are available in the plastic TO-92 transistor package. The LM34D device is available in an 8-lead, surface-mount, small-outline package. The LM34 device is a complement to the LM35 device (Centigrade) temperature sensor.

The LM34 series devices are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 device has an advantage over linear temperature sensors calibrated in degrees Kelvin, because the user is not required to subtract a large constant voltage from its output to obtain convenient Fahrenheit scaling. The LM34 device does not require any external calibration or trimming to provide typical accuracies of ±1/2°F at room temperature and ±1-1⁄2°F over a full −50°F to 300°F temperature range. Lower cost is assured by trimming and calibration at the wafer level. The low output impedance, linear output, and precise inherent calibration of the LM34 device makes interfacing to readout or control circuitry especially easy. It can be used with single power supplies or with plus and minus supplies. Because the LM34 device draws only 75 µA from its supply, the device has very low self-heating, less than 0.2°F in still air.

The LM34 device is rated to operate over a −50°F to 300°F temperature range, while the LM34C is rated for a −40°F to 230°F range (0°F with improved accuracy). The LM34 devices are series is available packaged in hermetic TO-46 transistor packages; while the LM34C, LM34CA, and LM34D are available in the plastic TO-92 transistor package. The LM34D device is available in an 8-lead, surface-mount, small-outline package. The LM34 device is a complement to the LM35 device (Centigrade) temperature sensor.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
TMP235 ACTIVE 1C analog temperature sensor, 10 mV/C This product has smaller package sizes, lower IQ (12uA), and supports a lower voltage supply (2.3V).
TMP236 ACTIVE ±2.0°C analog output temperature sensor, with 19.5mV/°C gain Similar sensor gain (19.5 mV/°C) in smaller packages with lower IQ (12 μA) for cost-optimized designs

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 2
Type Title Date
* Data sheet LM34 Precision Fahrenheit Temperature Sensors datasheet (Rev. D) PDF | HTML 05 Jan 2016
Application note AN-460 LM34/LM35 Precision Monolithic Temperature Sensors (Rev. C) 01 May 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Package Pins Download
SOIC (D) 8 View options
TO-92 (LP) 3 View options
TO-CAN (NDV) 3 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos