DESCRIPTION

· The LMH6525/LMH6526 is a laser diode driver designed for combination DVD/CD recordable and rewritable systems.
· It features two high-current outputs for reading and writing DVD (650nm) and CD (780nm) lasers.
· The device supports read, write, and erase functions through four separate switched current channels.
· Channel currents are summed at the selected output to generate multilevel waveforms for optical disc operations.
· The LVDS interface supports DVD write speeds of 16x and higher, minimizing noise and crosstalk.
· Optimized for speed and power consumption, it meets the demands of next-generation systems.
· Includes a 150 mA read channel, one 300 mA, and two 150 mA write channels, allowing a total output current of 600 mA or greater.
· Channel currents are set through four independent current inputs.

FEATURES

· LMH6525 features Differential Enable Oscillator Inputs; LMH6526 features Single Ended Enable Oscillator Inputs.
· Fast switching with rise and fall times of 0.6/1.0 ns.
· Low Voltage Differential Signaling (LVDS) channels enable interface for fast switching lines.
· Low output current noise: 0.24 nA/√Hz.
· Dual output selectable by SELA/B pin (Active HIGH).
· Four independent current channels with gains of 300 (300 mA Write Channel) and 150 (150 mA Low-Noise Read Channel).
· Two gain of 150, 150 mA Write Channels with a minimum combined output current of 600 mA.
· Integrated AC Coupled HFM Oscillator with selectable frequency and amplitude settings by external resistors.
· Frequency range from 200 MHz to 600 MHz with amplitude up to 100 mA Peak-to-Peak Modulation.
· Complete shutdown by ENABLE pin.
· 5V single-supply operation.
· Logic inputs compatible with TTL and CMOS.
· Space-saving package (OFN).

APPLICATIONS

· Combination DVD/CD Recordable and Rewritable Drives.
· DVD Camcorders.
· DVD Recorders.