The SP8110 is a Two-Channel Modulation IC utilizing high frequency current to suppress the noise of grounded laser diodes. Modulation frequency is adjusted in both channels simultaneously by an external resistor Rf tied to the ground. The amplitude of the high frequency current is set for each channel separately by a DC input current applied to the appropriate input pin (IA or IB for Laser A or Laser B, respectively). Current gain from input to output is 100mA/mA (typical).