Rainbow Electronics ATR1842 - Manual

NOTE: This is a summary document.
The complete document is currently not
available. For more information, please
contact your local Atmel sales office.
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