特點
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
典型應用
典型應用
描述
Most H (Metal Can), J (Ceramic), and K (Metal Can) Packages from Linear Technology 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.
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