ATR0881 Datasheet | Atmel

Features - Two High-side Outputs for Grounded Red Laser Diodes - Total Output Current up to 700 m A at VLD = 3.8V - One Low-side Output for Floating Blue Laser Diode - Total Output Current up to 550 m A, External LD Supply Voltage - Five Channels with Gain DACs - Two Current Inputs for Read and Write Channels - Channel 2 Current Contribution up to 350 m A - LVDS-patible Enable Inputs at Channels 2, 3, 4 and HFM - Optional Sync Drive Technology for Increased Timing Accuracy - mon Enable Input for All Channels - Low-EMI High-Frequency Modulator (HFM) with Wiper - Frequency Range 200 MHz to 500 MHz - Swing up to 100 m App - Erase Modulation Supported 3-output Laser Driver with 5 Channels and Serial Interface ATR0881 Preliminary Summary - Serial Interface (SPI and TWI) with Write and Read Operation - - - - - - - - - LD Output Channel Gains and Input Current Source Overcurrent Protection HFM Frequency and Swing HFM Frequency Measurement LVDS/Single Ended Input Configurations Sync Drive Mode Temperature Monitor Blue LD Voltage Monitor - Small, Pb-free, 24-pin, Paddle-up Package 4 mm × 4 mm Applications - Blu-ray/DVD/CD Recordable Drives - Blu-ray bo Drives Benefits - The Serial Interface Yields the Following Benefits: - - - - Low Pin Count and Small Package Flexible Channel Configurations Digital Gain Control High Accuracy of HFM Frequency NOTE: This is a summary document. The plete document is available. For more information, please contact your local Atmel sales office. 9105BS- DVD- 03/08 .. 1. Description The ATR0881 is a laser diode driver designed to operate two grounded red laser diodes for CD and DVD and one floating blue laser diode for Blu-ray. The floating blue laser diode needs an extra supply voltage VH. The serial interface (SPI and TWI supported) makes ATR0881 very flexible and configurable for a wide range of applications. Five channels can be assigned to one of the two reference current inputs IR and IW. The channel gains can be individually set by DACs....