Overview

Features and Benefits

  • 1µA to 10mA Operation
  • 0.02%/V Regulation
  • 0.8V to 30V Operating Voltage
  • Can Be Used as Linear Temperature Sensor
  • Draws No Reverse Current
  • Supplied in Standard Transistor Packages

Product Details

Most H (Metal Can), J (Ceramic), and K (Metal Can) Packages Are Now Obsolete

Download Complete Datasheet for Details

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 1µA/°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

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.