Description

The ZL40511/15 are high performance laser drivers capable of driving two separate cathode grounded laser diodes (e.g., 650 nm and 780 nm laser diodes).

The ZL40511/15 contain a 150 mA low-noise read channel (ChR), and three 500 mA write channels (Ch2, Ch3 and Ch4). The read channel amplifies the positive current supplied at its reference input, INR, by a fixed factor of 100. Write channels amplify the positive currents supplied at its reference inputs IN2, IN3, and IN4 by a fixed factor of 240.

An on-chip RF oscillator is provided for the reduction of laser mode hopping noise.

The ZL40511 offers higher tolerance performance.

Features

? Single 5 V supply (±10)

? 150 mA low-noise read channel with 100 x current gain

? Three 500 mA write channels with 240 x gain

? Combined channel output 700 mA

? Dual output for DVD/CD laser

? Rise and fall times 1 ns typical

? Oscillator, 500 MHz, 100 mA with external resistor control of frequency and amplitude

? Power Up/Down control

? CMOS control signals

? > 2 kV ESD

? Low Rth QFN package

? Contact Zarlink for available Custom Gain and Input Impedance options

Applications

? DVD±RW/RAM

? DVD±R

? CD-RW

? CD-R

? Write optical drives

? Laser Diode current switch

? Supports double density DVD