The Texas Instruments REF200AU is an IC designed for current mirror, sink, and source applications. It features an output current of 100µA and operates within a voltage range of 2.5V to 40V.
The REF200AUE4 is a precision current mirror and sink/source IC from Burr-Brown Corp. It features ±0.25% accuracy, operates over 2.5V to 40V, and draws 100µA supply current.