Easy-to-use programmable 200mA two-terminal current source

The LT3092, an innovative power IC from Linear Technology is now available from RS Components. The device provides system designers with a two-terminal current source. Traditionally, current sources were imprecise or had to be designed from other components. The LT3092 200mA two-terminal current source overcomes the problems associated with previous current sources, with its wide voltage range, high AC and DC impedance, good regulation, low temperature coefficient, and the fact that it requires no capacitors. The device's two floating terminals make it easy to use. The device features 1% initial accuracy and a very low temperature coefficient. Output current is programmable from 0.5mA to 200mA and current regulation over 1.5V to 40V is better than 10ppm/V. Unlike other analog integrated circuits, the LT3092 leverages special design techniques for high DC and AC impedance, ensuring stable operation without supply bypass capacitors. Since the LT3092 requires no capacitors, it is ideal for 'intrinsically safe' applications in which the output may be shorted and no sparking can be tolerated. Reverse supply tolerance and thermal shutdown protect both the IC and the load, says the company.