Programmable Bidirectional Current Source Using the AD5292 Digital Potentiometer and the ADA4091-4 Op-Amp

Programmable Bidirectional Current Source Using Digital Potentiometer and Rail-to-Rail Op-Amp. The circuit provides a programmable bidirectional Howland current source using the AD5292 digital potentiometer in conjunction with the quad ADA4091-4 Op-Amp and the ADR512 voltage reference. This circuit offers 10-bit resolution over an output current range of 18.4 mA