Features • Two High-side Outputs for Grounded Red Laser Diodes • Total Output Current up to 700 mA at VLD = 3.8V • One Low-side Output for Floating Blue Laser Diode • Total Output Current up to 550 mA, External LD Supply Voltage • Five Channels with Gain DACs • Two Current Inputs for Read and Write Channels • Channel 2 Current Contribution up to 350 mA • LVDS-compatible Enable Inputs at Channels 2, 3, 4 and HFM • Optional SyncDrive Technology for Increased Timing Accuracy • Common Enable Input for All Channels • Low-EMI High-Frequency Modulator (HFM) with Wiper – Frequency Range 200 MHz to 500 MHz – Swing up to 100 mApp – Erase Modulation Supported 3-output Laser Driver with 5 Channels and Serial Interface ATR0881 • Serial Interface (SPI and TWI) with Write and Read Operation – – – – – – – – – LD Output Channel Gains and Input Current Source Overcurrent Protection HFM Frequency and Swing HFM Frequency Measurement LVDS/Single Ended Input Configurations SyncDrive Mode Temperature Monitor Blue LD Voltage Monitor Preliminary Summary • Small, Pb-free, 24-pin, Paddle-up Package 4 mm × 4 mm Applications • Blu-ray/DVD/CD Recordable Drives • Blu-ray Combo Drives Benefits • The Serial Interface Yields the Following Benefits: – – – – Low Pin Count and Small Package Flexible Channel Configurations Digital Gain Control High Accuracy of HFM Frequency NOTE: This is a summary document. The complete document is available. For more information, please contact your local Atmel sales office. 9105BS–DVD–03/08 1. Description The ATR0881 is a laser diode driver designed to operate two grounded red laser diodes for CD and DVD and one floating blue laser diode for Blu-ray. The floating blue laser diode needs an extra supply voltage VH. The serial interface (SPI and TWI supported) makes ATR0881 very flexible and configurable for a wide range of applications. Five channels can be assigned to one of the two reference current inputs IR and IW. The channel gains can be individually set by DACs. Prescalers with 2 bits are provided to increase the resolution. Overcurrent protection circuits supervise the reference current inputs. The channel enable inputs can be configured as single ended or LVDS. In SyncDrive mode, channels 3, 4, and 5 are synchronized to channel 2. The on-chip spread spectrum HFM with low EMI reduces laser mode hopping noise. All HFM frequency and swing parameters can be set by the serial interface. A high frequency-accuracy can be achieved by the frequency counter feature. HFM enable can be configured as single ended or LVDS or automatically-disabling by write channels. 2 ATR0881 [Preliminary] 9105BS–DVD–03/08 ATR0881 [Preliminary] 2. Pin Configuration 24 23 22 Table 2-1. IOUTC RREF VDD SENB SDATA Pinning QFN24 SCLK 21 20 19 GNDC NE5 1 18 NE4 2 17 IOUTB E3 3 16 VDDAB NE3 4 15 VDDAB E2 5 14 IOUTA NE2 6 13 GND 7 8 9 10 11 12 ENO NENO NEX VDD IW Exposed Upside Paddle IR Figure 2-1. Pin Description Pin Symbol Type Function 1 NE5 Digital in 2 NE4 Digital in Enable channel 4 (inverting, LVDS, or single ended) 3 E3 Digital in Enable channel 3 (non-inverting, LVDS) 4 NE3 Digital in Enable channel 3 (inverting, LVDS, or single ended) 5 E2 Digital in Enable channel 2 (non-inverting, LVDS) 6 NE2 Digital in Enable channel 2 (inverting, LVDS, or single ended) 7 ENO Digital in Enable HFM (non-inverting, LVDS, or single ended) 8 NENO Digital in Enable HFM (inverting, LVDS) 9 NEX Digital in Multipurpose enable input (inverting, all channels, channel 1, write channels) 10 VDD Supply 11 IW Analog in Reference current input for write channels 12 IR Analog in Reference current input for read channels 13 GND Supply Enable channel 5 (inverting, single ended) or enable channel 4 (non-inverting, LVDS) Power supply GND 14 IOUTA Analog out 15, 16 VDDAB Supply 17 IOUTB Analog out 18 GNDC Supply 19 IOUTC Analog out 20 RREF Analog in 21 VDD Supply Power supply 22 SENB Digital in Serial enable 23 SDATA Digital in/out 24 SCLK Digital in Corners Laser diode anode connection Power supply for outputs IOUTA and IOUTB Laser diode anode connection GND for output IOUTC Laser diode cathode connection Reference current input for HFM and overcurrent detector Serial data input and output Serial clock Paddle – at least one corner has to be connected to GND 3 9105BS–DVD–03/08 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 10, 15, 16, 21 VDD –0.3 to +6.0 V VIN –0.3 to VDD + 0.3 V IIN 0 to 4 mA Power dissipation P 0.7(1) to 1(2) W Junction temperature Tj 150 °C Storage temperature Tstg –65 to +125 °C Supply voltage Input voltage at any pin Current into IR, IW and RREF pins (no voltage source allowed) Notes: 11, 12, 20 1. RthJA ≤ 115°C/W at Tamb = 70°C 2. RthJA ≤ 115°C/W at Tamb = 25°C 4. Thermal Resistance Parameters Junction-ambient Note: Symbol Value Unit RthJA 50 °C/W Package thermal resistance is measured on the ATR0881 demo board without heat spreader. Users should ensure that the junction temperature never exceeds 150°C. Thermal resistance from junction to case and to ambient depends very much on the PCB layout and on heat spreading measures. 5. Recommended Operating Conditions Parameters Pin Symbol Value Unit Supply voltage 10, 15, 16, 21 VDD 4.5 to 5.5 V Input current 11, 12 IR, IW ≤ 2 mA 20 RREF 13 ±1% External reference resistor to GND Operating voltage at IOUTC output 19 Operating temperature range Note: 4 VIOUTC Tamb 0.8 to 4.0 (1) 0 to +70 kΩ V °C 1. Adjust supply voltage VH of blue laser diode to keep VIOUTC within the specified range for all operating modes of the laser diode to avoid degradation of the laser diode. ATR0881 [Preliminary] 9105BS–DVD–03/08 ATR0881 [Preliminary] 6. Ordering Information Extended Type Number Package Remarks ATR0881-PTQW QFN24_PUP Taped and reeled 7. Package Information Package: QFN_PUP_4 x 4_24L Exposed pad 2.2 x 2.2 Dimensions in mm Top Bottom 19 24 Not indicated tolerances ±0.05 24 1 18 1 6 13 6 12 2.2±0.15 Drawing-No.: 6.543-5106.01-4 0.75±0.1 Z 10:1 0.5 nom. Z 2.5 0.4±0.1 4 0.35 0.2 7 technical drawings according to DIN specifications 0.35 0.23±0.07 Issue: 1; 18.03.04 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 9105BS-DVD-03/08 • All TWI parts added • Applications on page 1 changed • Section 4 “Thermal Resistance” on page 4 changed 5 9105BS–DVD–03/08 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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