atr0885

Manufacturer Part Numberatr0885
DescriptionAtr0885 3-output Laser Driver For Hd-dvd/ Blu-ray/dvd/ Cd-rom
ManufacturerATMEL Corporation
atr0885 datasheet
 
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Features
Three Selectable Outputs
All Outputs Can Be Used Either for Standard (5V) or High Voltage (9V)
Maximum Output Current at All Outputs Up to 150 mA
On-chip Low-EMI RF Oscillator With Spread-spectrum Technology
Control of 3 Different Swings Using 3 External Resistors
Oscillator Frequency Range from 200 MHz to 500 MHz
Maximum Oscillator Current Amplitude 100 mA
On-chip High-gain Transimpedance (IV) Amplifier
Small Green QFN24 4 mm × 4 mm Package
Applications
HD-DVD/DVD/CD ROM Drives
Blu-ray/DVD/CD ROM Drives
HD-DVD/DVD/CD Player
Blu-ray/DVD/CD Player
1. Description
ATR0885 is a laser diode driver designed to operate three different grounded or float-
ing laser diodes fo r reading CDs (λ = 780 nm), DVDs (λ = 65 0 n m) , a nd
HD-DVDs/Blu-ray (λ = 405 nm). An on-chip, low-EMI RF oscillator is available to
reduce laser mode hopping noise. The oscillator’s current amplitude can be set inde-
pendently for the three selectable outputs using three resistors (RSA, RSB, RSC).
The frequency setting is common to all IOUT outputs via a single resistor (RF). A logic
high level on the ENOSC pin enables the spread-spectrum RF oscillator. The
ATR0885 also includes a fast-settling transimpedance amplifier. It is provided to inter-
face between the front-end monitor photo diode and the adaptive laser diode power
control circuit. The gain of the transimpedance amplifier can set independently for
each of the three outputs using the resistors RTIA, RTIB and RTIC.
pp
3-output Laser
Driver for
HD-DVD/
Blu-ray/DVD/
CD-ROM
ATR0885
Preliminary
Summary
NOTE: This is a summary document.
The complete document is available
under NDA. For more information,
please contact your local Atmel sales
office.
4923CS–DVD–02/08

atr0885 Summary of contents

  • Page 1

    ... Blu-ray/DVD/CD Player 1. Description ATR0885 is a laser diode driver designed to operate three different grounded or float- ing laser diodes fo r reading CDs (λ = 780 nm), DVDs (λ HD-DVDs/Blu-ray (λ = 405 nm). An on-chip, low-EMI RF oscillator is available to reduce laser mode hopping noise. The oscillator’s current amplitude can be set inde- pendently for the three selectable outputs using three resistors (RSA, RSB, RSC) ...

  • Page 2

    ... Figure 1-1. ATR0885 [Preliminary] 2 Block Diagram RTIA RTIB RTIC PDIN Trans- impedance VREF amplifier Read IR channel Logic RF oscillator ENOSC PDOUT VCCA IOUTA VCCB Block enable IOUTB VCCC IOUTC 4923CS–DVD–02/08 ...

  • Page 3

    ... Output current source A for laser diode Ground, power supply External resistor to GND; sets frequency of oscillator External resistor to GND; sets swing of oscillator A External resistor to GND; sets swing of oscillator B External resistor to GND; sets swing of oscillator C ∼ Input current bias; 500Ω to ground - ATR0885 [Preliminary] 3 ...

  • Page 4

    ... High supply voltage (VCCA, VCCB, VCCC) Input current Output voltage range External resistor to GND to set oscillator frequency External resistor to GND to set oscillator swing Operating temperature range Transimpedance resistor Total capacitance at PDIN Load resistance Load capacitance Reference voltage ATR0885 [Preliminary] 4 Pin Symbol V VCCS V VCCH V PDIN 8, 9 ...

  • Page 5

    ... Package Green QFN24 (4 mm × 4 mm) 0.9 ±0.1 +0 0.05- 0.05 24 History • Put datasheet in a new template • Pin Description table (page 3): Function of Pin 2 and 3 changed ATR0885 [Preliminary] Remarks Taped and reeled 4 2 technical drawings according to DIN 13 6 specifications ...

  • Page 6

    ... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © 2008 Atmel Corporation. All rights reserved. Atmel Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. International Atmel Asia ...