The EL6252C is a high-performance two channel laser diode current amplifier that provides controlled current to a grounded laser diode. The write amplifier can provide over 200mA of DC or pulsed current. The R and W channels have switching speeds of approximately one nanosecond rise/fall time and are summed together at the IOUT output. The level of the output current is set by an analog voltage applied to an external resistor which converts the voltage into a current at the IIN pin (virtually ground). The current seen at this pin is then amplified by 100X to become a current source at pin IOUT.