AD9662 is a laser diode driver for high performance CD and DVD recordable drives. It includes three channels for three different optical power levels: the read channel generates a continuous output power level, whereas Channel 2 and Channel 3 are used as write channels having 0.8 ns rise/fall times. All channel currents are summed at the IOUT pin. Each channel’s output current is established by multiplying the channel’s input current and a current gain, where the current gain is controlled by the input current. The device is suitable for CD-RW, DVD-RW, DVD+RW and MO drives.
The AD9662 is a current-controlled current source designed for high-performance CD and DVD recordable drives. It features three channels: one read channel providing continuous output power, and two write channels (Channel 2 and Channel 3) capable of fast switching with rise/fall times of 0.8 ns. The device includes an on-chip oscillator to reduce laser mode hopping.
| Output Current (Read Channel) | 210 mA typical, 235 mA max |
|---|---|
| Output Current (Channel 3) | 315 mA typical, 340 mA max |
| Rise Time/Fall Time | 0.8 ns |
| Supply Voltage Range | 4.5 V to 5.5 V |
The device is used in CD-RW drives, DVD-RW and DVD+RW drives, and MO drives.
The maximum output current for Channel 3 is 340 mA.
The rise time and fall time for the write channels are both 0.8 ns.