DS1878 SFP+ Controllers Analog Devices DS1878 Controllers are small form factor pluggable (SFP+) controllers with a digital laser diode driver (LDD) interface. The state machine-based device implements SFF-8472 without software development. The DS1878 Controller from Analog Devices monitors six analog channels: temperature, VCC, and MON1 to MON4, with MON3 being differential with support for the common mode to VCC.