资 源 简 介
The EL6252C is a high-performance two channel laser diode currentamplifier 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 onenanosecond 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 anexternal resistor which converts the voltage into a current at the IIN pin(virtually ground). The current seen at this pin is then amplified by100X to become a current source at pin IOUT.An on-chip 500 MHz oscillator is provided to allow current modulaTIonwhen in the read mode. This is turned on when the OSCEN pin isheld high (floaTIng not recommended). Complete control of amplitudeand frequency is set by two external resistors connected to ground atpins RFREQ and RAMP (see graphs in this data sheet for furtherexplanaTIon).Write current pulses appear when an ‘L’ signal is applied to the OUTENW pin.
