ATR1874 Datasheet | Atmel

Features - - - - - - - - 650 nm and 780 nm Wavelengths Supported 150 MHz Data Channel Bandwidth Fast Settling Time 4 Configurable Gain Steps 12 Photo Diodes Low Offset Voltage Power-down Mode Pb-free Optical 16-pin Package Applications - - - - - DVD +RW with CD-RW Capability DVD -RW with CD-RW Capability DVD-RAM with CD-RW Capability DVD 18x Up to 20x Application Recordable Optical Data Storage Devices 10-channel High-speed Photo Detector IC for DVD/CD ATR1874 Summary Preliminary 1. Description The ATR1874 is a Photo Detector Integrated Circuit (PDIC) for operation in high-speed DVD applications like DVD-RAM and DVD+/-RW at a wavelength of 650 nm and CD-RW at a wavelength of 780 nm. It includes 10 channels with 4 different gain steps. The four channels A, B, C, and D are high-speed channels whereas the channels E1G1, E2G2, F1H1, F2H2 are high-gain channels at average speed for tracking control, sector information etc. The remaining two channels RF+ and RF- are RF paraphase outputs. Channels A to D are summed together at the RF outputs. http://../ Setting of the gain and entering/exiting sleep mode is controlled using the two tri-state inputs SW1 and SW2. All channels are set to tri-state during sleep mode. Due to its small package size the ATR1874 is especially suited for application with restricted height requirements like SLIM and Ultra SLIM drives. NOTE: This is a summary document. The plete document is available under NDA. For more information, please contact your local Atmel sales office. 4998AS- DVD- 05/07 Figure 1-1. Block Diagram VZERO 2.05V VREF 0.5- ∑ ∑ + SW1 SW2 Gain Switch RF+ 0.5- ∑ ∑ - RF- F2H2 + H1 H2 + F1H1 + G1 G2 +...