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 * 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 https://elecena.pl/product/376874/constant-current-source-and-temperature-sensor 2007-04-23 https://elecena.pl/product/376874/constant-current-source-and-temperature-sensor 2016-04-13 https://elecena.pl/product/376874/constant-current-source-and-temperature-sensor 2025-01-21