The AD9668 is a high performance CD-RW and DVD recorder laser diode driver.
The AD9668 is a 4-channel LVDS, dual-output laser diode driver with an on-chip oscillator designed for high-performance CD-RW and DVD recordable drives. It features dual current-controlled output current sources with four input channels, including a Read Channel and three Write Channels that can be controlled via TTL or LVDS interfaces.
| Output current (Read Channel) | 150 mA minimum |
|---|---|
| Output current (Write Channel 1) | 275 mA minimum |
| Output current (Write Channel 2) | 170 mA minimum |
| Output current (Write Channel 3) | 150 mA minimum |
| Rise time/fall time | <0.8 ns |
| Power supply | Single 5 V |
| Oscillator frequency range | 200 MHz to 500 MHz |
It is used in DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM supercombo drives, MO drives, and for laser diode current switching.
The level of the output current is set by an external resistor that converts an input voltage into a current at the xSET pins.