The main differences are the current setpoint and the compliance voltage.
On the DRV200, the DC current setpoint is adjusted with the onboard potentiometer.
On the DRV200S, the DC current setpoint is controlled externally through the ISET input. ISET is intended for slow/DC control and can be used simultaneously with the SMA modulation input.
The DRV200S also has separate VSI and VSL power supplies, allowing higher compliance voltages than the DRV200.
