T0820

Features Current-controlled Output Current Source with 4 Input Channels Low-power Consumption Output Current up to 150 mA, Read Channel and Channel 2 Output Current up to 200 mA, Channel 3 and Channel 4 Total Output Current to 300 mA Rise Time 1.0 ns, Fall Time 1.1 ns On-chip RF Oscillator Control Frequency and Swings by Use of 2 External Resistors Oscillator Frequency Range from 200 MHz to 600 MHz Oscillator Swing to 100 mA Single 5 V Power Supply Common Enable/Disable Input TTL/CMOS Control Signals www.DataSheet4U.com Small SSO16 Package 4-Channel Laser Driver with RF Oscillator T0820 Application DVD-RAM DVD-RW DVD+RW CD-RW Writable Optical Drives Description The T0820 is a laser diode driver for the operation of a grounded laser diode for writable optical drives. It includes four channels for four different optical power levels which are controlled by a separate IC. The read channel generates a continuous output level whereas channels 2 to 4 are provided as write channels with very fast switching speeds. Write current pulses are enabled when a "low" signal is applied to the NE pins. All channels are summed together at the IOUT pin. Read channel and channel 2 can contribute up to 150 mA and channels 3 and 4 up to 200 mA to the total output current of up to 300 mA. A total gain of 100 is provided between each reference current input and the selected output. Although the reference inputs are current inputs voltage control is possible b...