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 mApp 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 floating 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 independently 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 interface 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. 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 Figure 1-1. Block Diagram RTIA RTIB RTIC PDIN VREF IR SEL2 SEL1 PDOUT VCCA IOUTA Read channel Block enable Logic VCCB IOUTB VCCC IOUTC RF oscillator RF RSA RSB RSC ENOSC Transimpedance amplifier 2 ATR0885 [Preliminary] 4923CS–DVD–02/08 ATR0885 [Preliminary] 2. Pin Configuration Pinning QFN24 IR RSC RSB RSA RF GND Figure 2-1. 1 24 23 22 21 20 19 18 2 17 3 16 4 15 5 14 6 7 8 13 9 10 11 12 IOUTA VCCA IOUTB VCCB IOUTC VCCC GND VREF PDIN RTIA RTIB RTIC GND SEL1 SEL2 ENOSC VCCS PDOUT Table 2-1. Pin Description Pin Symbol Type Function 1 GND Supply Ground, power supply 2 SEL1 Digital Logic pin 1 to select IOUT/ENABLE IC 3 SEL2 Digital Logic pin 2 to select IOUT/ENABLE IC 4 ENOSC Digital Digital control of RF oscillator 5 VCCS Supply +5V power supply for internal circuit 6 PDOUT Analog IV amplifier output 7 GND Supply Ground, power supply 8 VREF Analog Reference voltage input 9 PDIN Analog Photo-diode input 10 RTIA Analog External resistor defining transimpedance IOUTA 11 RTIB Analog External resistor defining transimpedance IOUTB 12 RTIC Analog External resistor defining transimpedance IOUTC 13 VCCC Supply +5V to +9V power supply for IOUTC 14 IOUTC Analog Output current source C for laser diode 15 VCCB Supply +5V to +9V power supply for IOUTB 16 IOUTB Analog Output current source B for laser diode 17 VCCA Supply +5V to +9V power supply for IOUTA 18 IOUTA Analog Output current source A for laser diode 19 GND Supply Ground, power supply 20 RF Analog External resistor to GND; sets frequency of oscillator 21 RSA Analog External resistor to GND; sets swing of oscillator A 22 RSB Analog External resistor to GND; sets swing of oscillator B 23 RSC Analog External resistor to GND; sets swing of oscillator C 24 IR Analog Input current bias; ∼500Ω to ground Paddle GND Supply - 3 4923CS–DVD–02/08 3. Absolute Maximum Ratings Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Parameters Pin Symbol Value Unit Supply voltage VVCCS –0.5 to +6.0 V Supply voltage output stages (VCCA, VCCB, VCCC) VVCCH –0.5 to +9.5 V Input voltage VPDIN –0.5 to Vcc+0.5 V |0.5| V Differential voltage 8, 9 Vdiff_8,9 0.7 (1) to 1 (2) W Power dissipation Pmax Output voltage Vout –0.5 to Vcch–1 V Junction temperature Tj 150 °C Storage temperature Tstg –65 to +125 °C Symbol Value Unit RthJA 50(1) K/W Notes: 1. RthJA ≤ 115 K/W at Tamb = 70°C 2. RthJA ≤ 115 K/W at Tamb = 25°C Electrostatic sensitive device. Observe precautions for handling. 4. Thermal Resistance Parameters Junction ambient Note: 1. Measured with multi-layer test board (JDEC standard) 5. Recommended Operating Conditions Parameters Symbol Value Unit Supply voltage VVCCS 4.5 to 5.5 V High supply voltage (VCCA, VCCB, VCCC) VVCCH VVCCS to 9.0 V IIR <2 mA VPDOUT 0.8 to (VVCCS – 1.8) V RF >3 kΩ RS1, RS2, RS3 > 100 Ω Tamb 0 to +70 °C Transimpedance resistor RTI 1 to 50 kΩ Total capacitance at PDIN CPD < 15 pF Load resistance RLoad >5 kΩ Load capacitance CLoad < 30 pF Reference voltage VREF 1.6 to 3.0 V Input current Output voltage range External resistor to GND to set oscillator frequency External resistor to GND to set oscillator swing Operating temperature range 4 ATR0885 [Preliminary] 4923CS–DVD–02/08 ATR0885 [Preliminary] 6. Ordering Information Extended Type Number ATR0885-PFQW Package Remarks Green QFN24 (4 mm × 4 mm) Taped and reeled 7. Package Information Package: QFN 24 - 4 x 4 Exposed pad 2.6 x 2.6 (acc. JEDEC OUTLINE No. MO - 220) Dimensions in mm Not indicated tolerances ±0.05 0.9±0.1 4 +0 2.6 0.05-0.05 24 19 1 24 18 6 1 13 6 12 technical drawings according to DIN specifications 7 0.5 nom. 2.5 Drawing-No.: 6.543-5101.02-4 Issue: 1; 03.06.05 8. Revision History Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this document. Revision No. History 4923CC-DVD-02/08 • Put datasheet in a new template • Pin Description table (page 3): Function of Pin 2 and 3 changed 5 4923CS–DVD–02/08 Headquarters International Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 Atmel Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimshatsui East Kowloon Hong Kong Tel: (852) 2721-9778 Fax: (852) 2722-1369 Atmel Europe Le Krebs 8, Rue Jean-Pierre Timbaud BP 309 78054 Saint-Quentin-en-Yvelines Cedex France Tel: (33) 1-30-60-70-00 Fax: (33) 1-30-60-71-11 Atmel Japan 9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan Tel: (81) 3-3523-3551 Fax: (81) 3-3523-7581 Technical Support [email protected] Sales Contact www.atmel.com/contacts Product Contact Web Site www.atmel.com Literature Requests www.atmel.com/literature Disclaimer: The information in this document is provided in connection with Atmel products. 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