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| Features * * * * * * * * * * * * * Current-controlled Output Current Source, 3 Input Channels Two Selectable Outputs for Grounded Laser Diodes Output Current per Channel up to 250 mA Total Output Current to 300 mA (Minimum) Rise Time 1.0 ns, Fall Time 1.1 ns On-chip RF Oscillator Control of 2 Different Swings by Use of 2 external Resistors Oscillator Frequency Range from 200 MHz to 600 MHz Oscillator Swing to 100 mA Single 5 V Power Supply Common Enable/Disable Input TTL/CMOS Control Signals Small SSO16 Package Applications * DVD-ROM with CD-RW Capability (Combo Drives) * Combo Drives with CD and DVD Writing Capability 3-Channel Laser Driver with RF Oscillator and 2 Outputs T0806 Description The T0806 is a laser diode driver for the operation of two different grounded laser diodes for DVD-RAM (650 nm) and CD-RW (780 nm) drives. It includes three channels for three different optical power levels which are controlled by a separate IC. The read channel generates a continuous output level whereas channels 2 and 3 are provided as write channels with very fast switching speeds. Write current pulses are enabled when a low signal is applied to the NE pins. All channels are summed together and switched to one of the two outputs IOUTA or IOUTB by the select input SELA. Each channel can contribute up to 250 mA to the total output current of up to 300 mA. A total gain of 100 is provided between each reference current input and the selected output. Although the reference inputs are current inputs, voltage control is possible by using external resistors. An on-chip RF oscillator is provided to reduce laser mode hopping noise during read mode. Swing can be set independently for the two selectable outputs with two different resistors. Oscillation is enabled by a high signal at the ENOSC pin. Complete output current and oscillator switch-off is achieved by a `low' signal at the ENABLE input. Rev. 4522B-DVD-06/02 1 Figure 1. Block Diagram I3 NE3 I2 NE2 IR ENABLE Channel 3 IOUTA IOUTB Channel 2 Read channel ENOSC RF oscillator RF RSA RSB SELA Pin Configuration Figure 2. Pinning SSO16 IR I2 I3 RF NE2 NE3 ENABLE ENOSC 1 2 3 4 16 15 14 13 VCC1 IOUTA GND RSA RSB IOUTB SELA VCC2 T0806 5 6 7 8 12 11 10 9 2 T0806 4522B-DVD-06/02 T0806 Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol IR I2 I3 RF NE2 NE3 ENABLE ENOSC VCC2 SELA IOUTB RSB RSA GND IOUTA VCC1 Type analog analog analog analog digital digital digital digital supply digital analog analog analog supply analog supply Function Input current, bias voltage approximately GND Input current, bias voltage approximately GND Input current, bias voltage approximately GND External resistor to GND sets oscillator frequency of oscillator A Digital control of channel 2 (low active) Digital control of channel 3 (low active) Enables output current (high active) Enables RF oscillator (high active) + 5 V power supply for IOUT High: selects IOUTA, RSA Low: selects IOUTB, RSB Output current source B for laser diode External resistor to GND sets swing of oscillator B External resistor to GND sets swing of oscillator A Ground Output current source A for laser diode + 5 V power supply for IOUT and circuit Absolute Maximum Ratings Parameters Supply voltage Input voltage at IR, I2, I3 Input voltage at NE2, NE3, ENOSC Output voltage Total output current Output current per channel Power dissipation Junction temperature Storage temperature range Notes: 1. RthJA 115 K/W, Tamb = 70C 2. RthJA 115 K/W, Tamb = 25C Symbol VCC VIN1 VIN2 VOUT IOUT IOUT (IR, I2, I3) PMAX TJ TStg Value -0.5 to +6.0 -0.5 to +1.0 -0.5 to VCC +0.5 -0.5 to VCC -1 350 300 0.7 (1) to 1 (2) 150 -65 to +125 Unit V V V V mA mA W C C Thermal Resistance Parameters Junction ambient Symbol RthJA Value 135 Unit K/W 3 4522B-DVD-06/02 Recommended Operating Conditions Parameters Supply voltage range Input current External resistor to GND to set oscillator frequency External resistor to GND to set oscillator swing Operating temperature range Symbol VCC IIR/II2/II3 RF RSA, RSB Tamb Value 4.5 to 5.5 < 3.0 >3 >1 0 to +70 Unit V mA kW kW C Electrical Characteristics: General VCC = 5 V, Tamb = 25C, ENABLE = High, NE2 = NE3 = High, ENOSC = Low, unless otherwise specified. No. 1 1.1 Parameters Power Supply Supply current, power down Supply current, read mode, oscillator disabled Supply current, read mode, oscillator enabled, output A, selected Supply current, write mode Supply current, input off Digital Inputs NE2/NE3 low voltage NE2/NE3 high voltage SELA low voltage SELA high voltage ENABLE low voltage ENABLE high voltage ENOSC low voltage ENOSC high voltage Current at Digital Inputs NE2/NE3 low current NE2/NE3 high current SELA low current SELA high current ENABLE low current NE = 0 V NE = 5 V SELA = 0 V SELA = 5 V ENABLE = 0 V 5, 6 5, 6 10 10 7 INELO INEHI ISELALO ISELAHI IENLO -150 -50 150 -300 800 A A A A A A A A A A 5, 6 5, 6 10 10 7 7 8 8 VNELO VNEHI VSELALO VSELAHI VENLO VENHI VEOLO VEOHI 3.0 2.7 0.5 3.0 0.5 2.0 0.5 1.3 V V V V V V V V A A A A A A A A ENABLE = Low, NE2 = NE3 = Low IIR = II2 = II3 = 500 A 9, 16 9, 16 ICCPD2 ICCR1 0.3 90 mA mA A A Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 1.2 1.3 IIR = II2 = II3 = 500 A, ENOSC = High, RS = 8.2 kW, RF = 6.8 kW, SELA = High IIR = II2 = II3 = 500 A, NE2 = NE3 = Low IIR = II2 = II3 = 0 A 9, 16 ICCR2 93 mA A 1.4 1.5 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 3 3.1 3.2 3.3 3.4 3.5 9, 16 9, 16 ICCW ICCoff 180 17 mA mA A A *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 4 T0806 4522B-DVD-06/02 T0806 Electrical Characteristics: General (Continued) VCC = 5 V, Tamb = 25C, ENABLE = High, NE2 = NE3 = High, ENOSC = Low, unless otherwise specified. No. 3.6 3.7 3.8 Parameters ENABLE high current ENOSC low current ENOSC high current Test Conditions ENABLE = 5 V ENOSC = 0 V ENOSC = 5 V Pin 7 8 8 Symbol IENHI IEOLO IEOHI -100 800 Min. Typ. Max. 100 Unit A A A Type* A A A *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Electrical Characteristics: Laser Amplifier VCC = 5 V, Tamb = 25C, ENABLE = High, unless otherwise specified. No. Parameters Total output current Output current per channel Best fit current gain Best fit current offset Output current linearity IIN input impedance NE threshold Output off current 1 Output off current 2 Test Conditions Output is sourcing Output is sourcing Any channel (1) Any channel (1) Pin 11, 15 11, 15 11, 15 11, 15 11, 15 1, 2, 3 5, 6 11, 15 11, 15 Symbol IOUT IOUTR GAIN IOS ILIN RIN VTH IOFF1 IOFF2 Min. 300 250 90 -8 -3 150 Typ. 350 Max. Unit mA mA Type* A A A A A A C A A 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 Outputs IOUTA and IOUTB 100 130 +4 +3 mA/mA mA % W V Any channel (1) RIN is to GND Temperature stabilized ENABLE = Low NE2 = NE3 = High, IIR =0 A, II2 = II3 = 500 A NE2 = NE3 = Low, IIR = II2 = II3 = 0 A IOUT = 40 mA, VCC = 5 V 10%, read only IOUT = 80 mA, 40 mA read + 40 mA write, VCC = 5 V 10% IOUT = 40 mA, ENOSC = Low IOUT = 40 mA, read only IOUT = 80 mA, 40 mA read + 40 mA write 200 1.68 250 1 1 mA mA 4.10 Output off current 3 IOUT supply sensitivity, read mode IOUT supply sensitivity, write mode IOUT current output noise IOUT temperature sensitivity, read mode IOUT temperature sensitivity, write mode 11, 15 11, 15 IOFF3 VSER -5 5 +1 mA %/V A A 4.11 11, 15 VSEW -6 0 %/V A 4.12 4.13 4.14 4.15 11, 15 11, 15 11, 15 INOO TSER TSEW 3 500 500 nA/rt-Hz ppm/C ppm/C C C C *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Linearity of the amplifier is calculated using a best fit method at three operating points of IOUT at 20 mA, 40 mA, and 60 mA. IOUT = (IIN x GAIN) + IOS 5 4522B-DVD-06/02 Electrical Characteristics: Laser Amplifier AC Performance VCC = + 5 V, IOUT = 40 mA DC with 40 mA pulse, TA = 25C unless otherwise specified. No. 5 5.1 5.2 5.3 Parameters Write rise time Write fall time Output current overshoot IOUT ON propagation delay IOFF OFF propagation delay Disable time 5.6 Enable time 5.7 SELA delay 5.8 SELA delay 5.9 Amplifier bandwidth Oscillator Oscillator frequency Oscillator temperature coefficient Disable time oscillator Enable time oscillator 6.4 RF = 7.5 kW RF = 7.5 kW 11, 15 11, 15 FOSC TCOSC 255 300 -150 350 MHz ppm/C A C Test Conditions IOUT = 40 mA (read) + 40 mA (10% to 90%) (1) IOUT = 40 mA (read) + 40 mA (10% to 90%) (1) IOUT = 40 mA (read) + 40 mA (1) NE 50% High-Low to IOUT at 50% of final value NE 50% Low-High to IOUT at 50% of final value ENABLE 50% HighLow to IOUT at 50% of final value ENABLE 50% LowHigh to IOUT at 50% of final value SELA 50% Low-High to IOUT at 50% of final value SELA 50% High-Low to IOUT at 50% of final value IOUT = 50 mA, all channels, -3 dB value Pin 11, 15 11, 15 11, 15 11, 15 Symbol tRISE tFALL OS tON Min. Typ. 1.0 1.1 5 2 Max. 2.0 2.0 Unit ns ns % ns Type C C C C Outputs IOUTA and IOUTB, AC Performance 5.4 11, 15 tOFF 2 ns C 5.5 11, 15 tDIS 20 ns C 11, 15 tEN 20 ns C 11, 15 TSAH 20 C 11, 15 TSAL 20 C 5.10 6 6.1 6.2 11, 15 BWLCA 16 MHz C 6.3 ENOSC 50% High-Low to IOUT , at 10%/90% of final value ENOSC 50% Low-High to IOUT , at 10%/90% of final value 11, 15 TDISO 4 ns C 11, 15 TENO 2 ns C *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Load resistor at IOUT 6.8 W, measurement with 50-W oscilloscope and 39-W series resistor. 6 T0806 4522B-DVD-06/02 T0806 Characteristics Curves Figure 3. Oscillator Frequency vs. Resistor RF (RS = 7.5 kW) 550 500 Frequency (MHz) 450 400 350 300 250 200 4,0 5,0 6,0 7,0 8,0 9,0 10,0 RF (kW ) Figure 4. Oscillator Swing vs. Resistor RS (RF = 7.5 kW) 120 100 Swing / mA (pk/pk) 80 60 40 20 0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0 10,0 RS (kW ) Figure 5. Oscillator Frequency Dependency of Swing 60 50 Swing / mA (pk/pk) 40 30 20 10 0 200,0 250,0 300,0 350,0 400,0 450,0 500,0 Frequency (MHz) 7 4522B-DVD-06/02 Figure 6. Transfer Characteristic of all Channels (Gain = 110.7) 400 350 300 250 VCC = 5.5 V VCC = 5.0 V VCC = 4.5 V y = 0.1107x - 3.4498 IOUT (mA) 200 150 100 50 0 0 500 1000 1500 2000 2500 3000 3500 4000 Iin (A) Figure 7. Voltage Compliance R (IOUT to VCC)= 5.9 W 350 300 250 IOUT (mA) 200 150 100 50 0 0.0 1.0 2.0 3.0 4.0 5.0 VCC-V (IOUT) /V Figure 8. Step Response, Read Channel: 50 mA, Channel 2: 50 mApp 8 T0806 4522B-DVD-06/02 T0806 Figure 9. Step Response, Read Channel: 50 mA, Channel 2: 250 mApp Timing Diagram Figure 10. Timing Diagram of IOUTA/IOUTB t ON t ON t EN tr tr t OFF t OFF t DIS tf tf 9 4522B-DVD-06/02 Typical Application Circuit Figure 11. Application Circuit A n a l o g IR I2 I3 RF NE2 D i g i t a l NE3 ENABLE ENOSC 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC1 IOUTA GND RSA RSB IOUTB SELA VCC2 LD LD VCC 10 T0806 4522B-DVD-06/02 T0806 Ordering Information Extended Type Number Package Remarks T0806-TCQ SSO16 Taped and reeled Package Information 11 4522B-DVD-06/02 Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1(719) 576-3300 FAX 1(719) 540-1759 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Microcontrollers 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL (33) 2-40-18-18-18 FAX (33) 2-40-18-19-60 Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France TEL (33) 4-76-58-30-00 FAX (33) 4-76-58-34-80 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4-42-53-60-00 FAX (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1(719) 576-3300 FAX 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland TEL (44) 1355-803-000 FAX (44) 1355-242-743 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 literature@atmel.com Web Site http://www.atmel.com (c) Atmel Corporation 2002. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems. Atmel (R) is the registered trademark of Atmel. Other terms and product names may by the trademarks of others. Printed on recycled paper. 4522B-DVD-06/02 xM |
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