NOTE: This is a summary document.

The complete document is available

under NDA. For more information,

please contact your local Atmel sales

office.

Features

Applications

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 differ-

ent 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.

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 UltraSLIM drives.

10-channel

High-speed

Photo Detector

IC for DVD/CD

ATR1874

Summary

Preliminary

4998AS–DVD–05/07