GENERAL DESCRIPTION

The AD9660 is a highly integrated driver for laser diode applications such as optical disk drives, printers, and copiers. The AD9660 gets feedback from an external photo detector and includes two analog feedback loops to allow users to set “bias” and “write” (for optical disk drives) power levels of the laser, and switch between the two power levels at up to 200 MHz. Output rise and fall times are typically 1.5 ns and 2.0 ns to complement printer applications that use image enhancing techniques such as pulse width modulation to achieve gray scale, and allow disk drive applications to improve density and take advantage of pulsed write formats. Control signals are TTL/ CMOS compatible.

FEATURES

1.5 ns Rise/2.0 ns Fall Times

Output Current: 180 mA @ 3 V, 200 mA @ 2.5 V

Bias Current: 90 mA @ 3 V

Modulation Current: 60 mA @ 3 V

Offset Current: 30 mA @ 3 V

Single +5 V Power Supply

Switching Rate: 200 MHz

Onboard Light Power Control Loops

APPLICATIONS

Laser Printers and Copiers

Optical Disk Drives

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