Owner's manual

NOTE: This is a summary document.
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Features
405 nm, 650 nm and 780 nm Wavelengths Supported
Blu-ray/HD-DVD x5, CD-R/RW x52, DVD-R/RW x16
Adjustment of Mode and Gain by Setting Internal Register via Serial Interface
Paraphase Outputs
Internal Reference Voltage Generation
Fast Settling Time
Low Offset Voltage
Power-down Mode
Pb-free Optical 12-pin Package
Applications
Blu-ray/HD-DVD
DVD+RW with CD-RW Capability
DVD-RW with CD-RW Capability
DVD-RAM with CD-RW Capability
Recordable Optical Data Storage Devices
1. Description
The ATR1842 is a front monitor diode (FMD) which controls the laser power of the
optical pickup for Blu-ray/HD-DVD, DVD and CD drives in one IC.
With the serial programming interface (SPI) it is possible to fit the laser power for
Blu-ray/HD-DVD, DVD and CD. 2 bits are used to set the mode/gain level and 6 addi-
tional bits are used for gain trimming, within ±6 dB. Also setting into sleep mode can
be done via the serial programmin interface (SPI).
The integrated PIN diode and the high speed amplifier with low output impedance
ensures stable driver performance.
All output channels are set to tri-state during sleep mode.
Due to its small package size the ATR1842 is especially suited for applications with
low height requirements like SLIM and Ultra-SLIM drives.
Front Monitor
Diode for
Blu-ray/HD-DVD/
DVD/CD with
Serial Interface
ATR1842
Summary
Preliminary
9109AS–DVD–08/07

Summary of content (8 pages)