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Shop > Analog/Linear > Power Management Circuit > Ics & Semiconductors >
 

IC LM334Z (LT65-5201) 1-to-40V 10mA Adjustable Current Sources

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LM334Z (LT65-5201) 3-Terminal Adjustable Current Sources The LM334 is a 3-terminal adjustable current sources featuring 10,000:1 range in operating current, excellent current regulation and a wide dynamic voltage range of 1V to 40V. Current is established with one external resistor and no other parts are required. Initial current accuracy is A 3%. The LM334 is a true floating current sources with no separate power supply connections. In addition, reverse applied voltages of up to 20V will draw only a few dozen microamperes of current, allowing the devices to act as both a rectifier and current source in AC applications. (LT65-5201 Linear Tech) The sense voltage used to establish operating current in the LM134 is 64mV at 25C and is directly proportional to absolute temperature (K). The simplest one external resistor connection, then, generates a current with about 0.33%/C temperature dependence. Zero drift operation can be obtained by adding one extra resistor and a diode. Applications for the current sources include bias networks, surge protection, low power reference, ramp generation, LED driver, and temperature sensing. The LM334 is guaranteed over a temperature range 0C to 70C. These devices are available in TO-92 and SO-8 plastic packages. Features Operates from 1V to 40V 0.02%/V current regulation Programmable from 1AmicroA to 10mA True 2-terminal operation Available as fully specified temperature sensor A 3% initial accuracy