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 additional 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. Front Monitor Diode for Blu-ray/HD-DVD/ DVD/CD with Serial Interface ATR1842 Summary Preliminary 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. NOTE: This is a summary document. The complete document is currently not available. For more information, please contact your local Atmel sales office. 9109AS–DVD–08/07 Figure 1-1. Block Diagram SENB SDATA SCLK Gain Select (H/M/L) Gain Adjust (±6 dB) RF+ RFInternal Vref VCC GND 2 ADS ATR1842 [Preliminary] 9109AS–DVD–08/07 ATR1842 [Preliminary] 2. Pin Configuration Figure 2-1. Table 2-1. Pinning QFN12L NC NC 10 11 GND 1 8 GND RF- 2 7 SENB RF+ 3 6 SCLK VCC 4 5 SDATA 9 12 NC NC Pin Description Pin Symbol Type Function 1 GND Supply Ground 2 RF- Analog Negative output 3 RF+ Analog Positive output 4 VCC Supply Power supply 5 SDATA Digital Serial interface, data input 6 SCLK Digital Serial interface, clock 7 SENB Digital Serial interface, data enable 8 GND Supply Ground 9 NC Not connected 10 NC Not connected 11 NC Not connected 12 NC Not connected 3 9109AS–DVD–08/07 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 Symbol Value Unit Supply voltage VCC –0.5 to +6.0 V Input voltage at any input Vin –0.5 to VCC – 0.5 V Storage temperature Tstg –40 to +100 °C Soldering temperature QFN_Open package Tsol 260 °C Symbol Value Unit Supply voltage VCC 4.5 to 5.5 V Operating temperature range Tamb –10 to +80 °C 4. Recommended Operating Conditions Parameters 5. Electrical Characteristics: General VCC = 5V, Tamb = 25°C, λ = 405 nm/780 nm/650 nm Output load: Rload = 10 kΩ, Cload = 20 pF No. 1 Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 28 30 mA A 0.5 mA A DC Specifications, Power Supply 1.1 Supply current ICC 1.2 Supply current (standby mode) ICC 1.3 VREF_INT 1.4 TCVREF_INT 1.5 Maximum output voltage Vout 1.6 Minimum output voltage Vout 1.7 Power supply rejection ratio Low-frequency (10 kHz), inclusive application/ flexboard PSRR 1.8 Power supply rejection ratio High-frequency (100 kHz), inclusive application/ flexboard PSRR 2 Output Offset Voltage VREF – VRF+, VREF – VRF– VOFF1 –20 dVOFF/dT –25 2.1 Output offset 2.2 Offset drift 1.65 V A 15 µV/°C C V C V C –45 dB C –45 dB C +20 mV C +25 µV/°C C VCC – 0.9 0.3 0 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 4 ATR1842 [Preliminary] 9109AS–DVD–08/07 ATR1842 [Preliminary] 6. Serial Programming Interface 6.1 Data MSB2 m1 6.2 LSB2 m2 g1 g2 g3 g4 g5 g6 Mode Setting The first two bits select the mode/gain level. Table 6-1. 6.3 Mode Selection Register m1 m2 Mode Select 1 1 High Gain 1 0 Middle Gain 0 1 Low Gain 0 0 Sleep Gain Setting The last six bits are used to finely adjust the gain by ±6 dB. Table 6-2. Gain Selection Register g1 g2 g3 g4 g5 g6 Gain 1 1 1 1 1 1 +6 dB … 1 0 0 0 0 0 … 0 0 0 0 dB 0 0 0 –6 dB … … 5 9109AS–DVD–08/07 7. Applications Recommendation To achieve the best performance VCC needs to be blocked using a high quality capacitor (C = 100 nF) as close to IC/pin as possible. 8. Photo Diode Arrangement Figure 8-1. Phote Diode Arrangement D D Dimensions 500.0 µm Photo diode is symmetrically centered to the center of the chip and package 6 ATR1842 [Preliminary] 9109AS–DVD–08/07 ATR1842 [Preliminary] 9. Ordering Information Extended Type Number Package Remarks ATR1842-P1QN QFN_OPEN_3x3_8L Taped and reeled, Pb-free 10. Package Information 7 9109AS–DVD–08/07 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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