EL6215

EL6215 To request the full datasheet, please visit www.intersil.com/products/EL6215 Data Sheet June 15, 2004 FN7223 3-Channel Laser Diode Driver + Oscillator The EL6215 is a high-performance three channel laser driver that provides controlled current to a grounded laser diode. Write channels 2 and 3 should be used as the write channels, with switching speeds of approximately one nanosecond rise/fall time. All three channels are summed together at the IOUT output, allowing the user to create multilevel waveforms in order to optimize laser diode performance. 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 to become a current source at pin IOUT. An on-chip 500MHz oscillator is provided to allow output current modulation when in any mode. This is turned on when the OSCEN pin is held high. Complete control of amplitude and frequency is set by two external resistors connected to ground at pins RFREQ and RAMP (see graphs in this data sheet for further explanation). Features Shrink-Small Outline Package Voltage-controlled output current source requiring one external set resistor per channel Rise time = 0.8ns Fall time = 0.8ns On chip oscillator with frequency and amplitude control by use of external resistors to ground Oscillator to 500MHz Oscillator to 100mA pk/pk Single +5V supply (±10%) Dis...