Analog Device product for TENS device to output constant current up to +/- 30 mA at output voltage ranging up to +/- 50V


Are there are any products or evaluation boards that can enable generation of pulses for electrical stimulation in biomedical applications of nerve stimulator?

The output current and voltage ranges are

+/- 25 mA 

+/- 50 V to overcome human skin resistance

Rather than using a circuit that achieve the above, I was wondering if there is a module or a evaluation kit that could achieve the above for initial prototype testing.