LM334S
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LM334S

Constant Current Source and Temperature Sensor

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Info: : PRODUCTION tooltip
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Part Details
Part Models 4
1ku List Price Starting From $1.78
Features
  • 1µA to 10mA Operation
  • 0.02%/V Regulation
  • 0.8V to 40V Operating Voltage
  • Can be Used as Linear Temperature Sensor
  • Draws No Reverse Current
  • Supplied in Standard Transistor Packages
Additional Details
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The LM134 is a three-terminal current source designed to operate at current levels from 1µA to 10mA, as set by an external resistor. The device operates as a true two terminal current source, requiring no extra power connections or input signals. Regulation is typically 0.02%/V and terminal-to-terminal voltage can range from 800mV to 40V.

Because the operating current is directly proportional to absolute temperature in degrees Kelvin, the device will also find wide applications as a temperature sensor. The temperature dependence of the operating current is 0.336%/°C at room temperature. For example, a device operating at 298µA will have a temperature coefficient of 1mA/°C. The temperature dependence is extremely accurate and repeatable. Devices specified as temperature sensors in the 100µA to 1mA range are the LM134-3, LM234-3 and the LM134-6, LM234-6, with the dash numbers indicating ±3°C and ±6°C accuracies, respectively.

If a zero temperature coefficient current source is required, this is easily achieved by adding a diode and a resistor.

Applications

  • Current Mode Temperature Sensing
  • Constant Current Source for Shunt References
  • Cold Junction Compensation Constant-Gain Bias for Bipolar Differential Stage
  • Micropower Bias Networks
  • Buffer for Photoconductive Cell
  • Current Limiter
Part Models 4
1ku List Price Starting From $1.78

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Oct 12, 2022

- 22_0254

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

Nov 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

Feb 20, 2022

- 22_0014

Final Packaging Changes for TO-92, TO-5 and TO-46

Mar 6, 2022

- 22_0014

Final Packaging Changes for TO-92, TO-5 and TO-46

Filter by Model

reset

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Part Models

Product Lifecycle

PCN

Oct 12, 2022

- 22_0254

arrow down

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

Nov 11, 2021

- 21_0060

arrow down

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

Feb 20, 2022

- 22_0014

arrow down

Final Packaging Changes for TO-92, TO-5 and TO-46

Mar 6, 2022

- 22_0014

arrow down

Final Packaging Changes for TO-92, TO-5 and TO-46

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