General Description

The EL6272C is a single channel laser diode current amplifier that provides controlled current to a grounded laser diode. The amplifier can provide up to 200 mA of DC or pulsed current with switching speeds of approximately three nanoseconds rise/fall time. 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.

Features

• Voltage-controlled output current source (requiring one external set resistor)

• Current-controlled output current source.

• Rise time = 3.0 ns typ.

• Fall time = 3.5 ns typ.

• On-chip oscillator w/frequency and amplitude control by use of external resistors to ground.

• Oscillator to 500 MHz typ.

• Oscillator to 100 mA pk/pk typ.

• Single +5V supply (±10)

• Current amplification = 100

• TTL/CMOS control signals

Applications

• MO drives

• Mini-Disc drives

• Writable optical drives

• Laser diode current switching