ATR0885

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 3-output Laser Driver for HD-DVD/ Blu-ray/DVD/ CD-ROM ATR0885 Preliminary Summary 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. 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 Transimpedance amplifier PDOUT IR Read channel Block enable VCCA IOUTA VCCB IOUTB VCCC IOUTC SEL2 SEL1 Logic ENOSC RF oscillator 2 ATR0885 [Preliminary] 4923CS–DVD–02/08 RF RSA RSB RSC ATR0885 [Preliminary] 2. Pin Configuration Figure 2-1. Pinning QFN24 IR RSC RSB RSA RF GND GND SEL1 SEL2 ENOSC VCCS PDOUT 1 2 3 4 5 6 24 23 22 21 20 19 18 17 16 15 14 78 13 9 10 11 12 IOUTA VCCA IOUTB VCCB IOUTC VCCC Table 2-1. Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Paddle Pin Description Symbol GND SEL1 SEL2 ENOSC VCCS PDOUT GND VREF PDIN RTIA RTIB RTIC VCCC IOUTC VCCB IOUTB VCCA IOUTA GND RF RSA RSB RSC IR GND Type Supply Digital Digital Digital Supply Analog Supply Analog Analog Analog Analog Analog Supply Analog Supply Analog Supply Analog Supply Analog Analog Analog Analog Analog Supply Function Ground, power supply Logic pin 1 to select IOUT/ENABLE IC Logic pin 2 to select IOUT/ENABLE IC Digital control of RF oscillator +5V power supply for internal circuit IV amplifier output Ground, power supply Reference voltage input Photo-diode input External resistor defining transimpedance IOUTA External resistor defining transimpedance IOUTB External resistor defining transimpedance IOUTC +5V to +9V power supply for IOUTC Output current source C for laser diode +5V to +9V power supply for IOUTB Output current source B for laser diode +5V to +9V power supply for IOUTA 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 - GND VREF PDIN RTIA RTIB RTIC 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 Supply voltage Supply voltage output stages (VCCA, VCCB, VCCC) Input voltage Differential voltage Power dissipation Output voltage Junction temperature Storage temperature Notes: 1. RthJA ≤ 115 K/W at Tamb = 70°C 2. RthJA ≤ 115 K/W at Tamb = 25°C 8, 9 Pin Symbol VVCCS VVCCH VPDIN Vdiff_8,9 Pmax Vout Tj Tstg 0.7 Value –0.5 to +6.0 –0.5 to +9.5 –0.5 to Vcc+0.5 |0.5| (1) Unit V V V V (2) to 1 W V °C °C –0.5 to Vcch–1 150 –65 to +125 Electrostatic sensitive device. Observe precautions for handling. 4. Thermal Resistance Parameters Junction ambient Note: 1. Symbol RthJA Measured with multi-layer test board (JDEC standard) Value 50(1) Unit K/W 5. Recommended Operating Conditions Parameters Supply voltage 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 Symbol VVCCS VVCCH IIR VPDOUT RF RS1, RS2, RS3 Tamb RTI CPD RLoad CLoad VREF Value 4.5 to 5.5 VVCCS to 9.0 3 > 100 0 to +70 1 to 50 < 15 >5 < 30 1.6 to 3.0 Unit V V mA V kΩ Ω °C kΩ pF kΩ pF V 4 ATR0885 [Preliminary] 4923CS–DVD–02/08 ATR0885 [Preliminary] 6. Ordering Information Extended Type Number ATR0885-PFQW Package Green QFN24 (4 mm × 4 mm) Remarks 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 +0 4 2.6 0.05-0.05 24 1 18 19 24 1 technical drawings according to DIN specifications 6 13 12 7 6 0.5 nom. Drawing-No.: 6.543-5101.02-4 Issue: 1; 03.06.05 2.5 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. 4923CC-DVD-02/08 History • Put datasheet in a new template • Pin Description table (page 3): Function of Pin 2 and 3 changed 5 4923CS–DVD–02/08 Headquarters Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: 1(408) 441-0311 Fax: 1(408) 487-2600 International 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 Product Contact Web Site www.atmel.com Technical Support dvd_ldd@atmel.com Sales Contact www.atmel.com/contacts Literature Requests www.atmel.com/literature Disclaimer: T he information in this document is provided in connection with Atmel products. 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