AD9664

4-Channel LVDS Dual-Output Laser Diode Driver with Oscillator AD9664 www.DataSheet4U.com FEATURES Dual-current controlled output current sources with 4 input channels TTL selectable output Stable on-chip oscillators with independent frequency and amplitude control TTL or LVDS selectable write channel enables Independent TTL oscillator enable 150 mA minimum output current for Read Channel 325 mA minimum output current for Write Channel 1 250 mA minimum output current for Write Channel 2 150 mA minimum output current for Write Channel 3 Rise time/fall time of ≤0.8 ns Low output overshoot Low power consumption Single 5 V power supply (±10%) W3SET W3DIS W3DISN FUNCTIONAL BLOCK DIAGRAM WRITE CHANNEL 3 W2SET W2DIS W2DISN WRITE CHANNEL 2 OUTPUT A LD1 W1SET W1DIS W1DISN WRITE CHANNEL 1 OUTPUT B LD2 RSET RDIS READ CHANNEL INS FADJ1 FADJ2 AADJ1 AADJ2 OUTSEL APPLICATIONS DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM supercombo drives MO drives Laser diode current switching Figure 1. 4-Channel LVDS Laser Driver Block Diagram GENERAL DESCRIPTION The AD9664 is a laser diode driver for high performance CD-RW and DVD recordable drives. It includes four channels for four different optical power levels: the Read Channel generates a continuous output power level, whereas Channel 1, Channel 2, and Channel 3 can be used as write channels that can be controlled with an LVDS or TTL interface. The OSCEN pin is controlled by a TTL signal. All channels are summed at the selected LD output pin w...