SP8036

www.DataSheet4U.com Solved by SP8036 TM APC Amplifier with Integrated Photodiode and Gain Adjust Capability FEATURES Dual wavelength 650nm and 780nm 13 ns Settling Time to 2% 100 MHz Bandwidth at -3dB 10 mV Output Offset Voltage o 25 µV/ C Output Offset Voltage Drift ± 6 dB External Gain Adjust Small 8-pin OPLGA package Power-down mode Vref 1 Rgain1 2 Rgain2 3 __ CE 4 SP8036 8-Pin OPLGA 8 Vcc 7 Gain 6 Vout 5 Gnd APPLICATIONS CD-R, and CD-RW DVD+/-R, DVD+/-RW, and DVDRAM GENERAL DESCRIPTION The SP8036 represents the next generation in Automatic Power Control (APC) amplifiers designed specifically for demanding pick-up head applications. With its integrated photo detector, the SP8036 monitors light intensity of the laser diode in CD-R, CD-RW, DVD+/-R, DVD+/-RW, and DVD-RAM assemblies and converts this light to an output voltage. The magnitude of this voltage signal corresponds to the laser power intensity and is subsequently fed back to the laser diode driver to control the laser output power. The SP8036 on-chip photo detector transforms incident laser light into a proportional current, which is then converted to a voltage through a transimpedance amplifier. Adjustable gain is provided in the transimpedance amplifier by means of a gain control loop that is controlled by an external resistor. This external resistor is not a part of the signal path, which greatly reduces the effects of all parasitic capacitances and inductances on the flex cable at these pin...