 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| Features * * * * * * * * * * * * * * Current-controlled Output Current Source with 4 Input Channels Low-power Consumption Output Current up to 150 mA, Read Channel and Channel 2 Output Current up to 200 mA, Channel 3 and Channel 4 Total Output Current to 300 mA Rise Time 1.0 ns, Fall Time 1.1 ns On-chip RF Oscillator Control Frequency and 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 4-Channel Laser Driver with RF Oscillator T0820 Application * * * * * DVD-RAM DVD-RW DVD+RW CD-RW Writable Optical Drives Description The T0820 is a laser diode driver for the operation of a grounded laser diode for writable optical drives. It includes four channels for four different optical power levels which are controlled by a separate IC. The read channel generates a continuous output level whereas channels 2 to 4 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 at the IOUT pin. Read channel and channel 2 can contribute up to 150 mA and channels 3 and 4 up to 200 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. Frequency and swing can be set by two external resistors. Oscillation is enabled by a "high" at the ENOSC pin. Complete output current and oscillator switch-off is achieved by a low' at the ENABLE input. Figure 1. Block Diagram I4 NE4 Channel 4 I3 NE3 I2 NE2 IR ENABLE Channel 3 Channel 2 IOUT Read channel ENOSC RF oscillator RF RS Rev. 4506E-DVD-09/02 1 Pin Configuration Figure 2. Pinning SSO16 IR I2 RF I3 I4 NE2 NE3 NE4 1 2 3 4 16 15 14 13 VCC1 VCC2 IOUT GND RS ENABLE ENOSC VCC2 T0820 5 6 7 8 12 11 10 9 Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol IR I2 RF I3 I4 NE2 NE3 NE4 VCC2 ENOSC ENABLE RS GND IOUT VCC2 VCC1 Type analog analog analog analog analog digital digital digital supply digital digital analog supply analog supply supply Function Input current, bias voltage approximately GND Input current, bias voltage approximately GND External resistor to GND sets oscillator frequency Input current, bias voltage approximately GND Input current, bias voltage approximately GND Digital control of channel 2 (low active) Digital control of channel 3 (low active) Digital control of channel 4 (low active) +5 V power supply for IOUT Enables RF oscillator (high active) Enables output current (high active) External resistor to GND sets oscillator swing Ground Output current source for laser diode +5 V power supply for IOUT +5 V power supply for circuit 2 T0820 4506E-DVD-09/02 T0820 Absolute Maximum Ratings Parameters Supply voltage Input voltage at IR, I2, I3, I4 Input voltage at NE2, NE3, NE4, ENOSC Output voltage 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 PMAX Tj Tstg Value -0.5 to +6.0 -0.5 to +0.8 -0.5 to VCC +0.5 -0.5 to VCC -1 0.7 (1) Unit V V V V W _C _C to 1 (2) 150 -65 to +125 Thermal Resistance Parameters Junction ambient Note: Symbol RthJA Value 115 (1) Unit K/W 1. Measured with multi-layer test board (JEDEC standard) Operating Range 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, II4 RF RS Tamb Value 4.5 to 5.5 <2 >3 > 100 0 to +70 Unit V mA kW W C 3 4506E-DVD-09/02 Electrical Characteristics: General VCC = 5 V, Tamb = 25C, ENABLE = High, NE2 = NE3 = NE4 = High, ENOSC = Low, unless otherwise specified No. 1 1.1 1.2 Parameters Power supply Supply current, power down Supply current, read mode, oscillator disabled Supply current, read mode, oscillator enabled ENABLE = Low, NE2 = NE3 = NE4 = Low IIR = II2 = II3 = II4 = 500 mA IIR = II2 = II3 = II4 = 500 mA, ENOSC = High, RS = 560 W, RF = 7.5 kW IIR = II2 = II3 = II4= 500 mA, NE2 = NE3 = NE4 = Low IIR = II2 = II3 = II4 = 0 mA 9, 15, 16 9, 15, 16 ICCPD2 ICCR1 0.3 mA A Test Condition Pin Symbol Min. Typ. Max. Unit Type* 95 mA A 1.3 9, 15, 16 ICCR2 100 mA A 1.4 Supply current, write mode Supply current, input off Digital inputs NE2/NE3/NE4 low voltage NE2/NE3/NE4 high voltage ENABLE low voltage ENABLE high voltage ENOSC low voltage ENOSC high voltage 9, 15, 16 9, 15, 16 ICCW ICCoff 230 mA A 1.5 2 2.1 2.2 2.3 2.4 2.5 2.6 3 3.1 3.2 3.3 3.4 3.5 3.6 16 mA A 6, 7, 8 6, 7, 8 11 11 10 10 NE = 0 V NE = 5 V ENABLE = 0 V ENABLE = 5 V ENOSC = 0 V ENOSC = 5 V VNELO VNEHI VENLO VENHI VEOLO VEOHI 3.0 3.0 2.0 1.3 V V A A A A A A 0.5 0.5 V V V V Current at digital inputs NE2/NE3/NE4 low current NE2/NE3/NE4 high current ENABLE low current ENABLE high current ENOSC low current ENOSC high current 6, 7, 8 6, 7, 8 11 11 10 10 INELO INEHI IENLO IENHI IEOLO IEOHI -100 800 -150 100 -300 800 mA mA mA mA mA mA A A A A A a * Type means: A: 100% tested B: 100% correlation tested C: Characterized on samples D: Design parameter 4 T0820 4506E-DVD-09/02 T0820 Electrical Characteristics: Laser Amplifier VCC = 5 V, Tamb = 25C, ENABLE = High, unless otherwise specified No. 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 4.11 4.12 4.13 4.14 4.15 4.16 Parameters Laser Amplifier Best fit current gain Best fit current offset Output current linearity Input current range Output current read channel Output current channel 2 Output current channel 3 Output current channel 4 Output current read channel + channel 2 Output current channel 3 + channel 4 Total output current IOUT series resistor IIN input impedance NE threshold Output off current 1 Output off current 2 Any channel (1) Any channel Any channel (1) (1) Test Conditions Pin 14 14 14 1, 2, 4, 5 14 14 14 14 14 14 14 14 1, 2, 4, 5 6, 7, 8 Symbol GAIN IOS ILIN IDAC IOUTR IOUT2 IOUT3 IOUT4 IOUTR,2 IOUT3,4 IOUT ROUT RIN VTH IOFF1 Min. 90 -8 -3 0 150 150 200 200 150 200 300 Typ. 105 Max. 130 +4 +3 3 Unit mA/mA mA % mA mA mA mA mA mA mA mA Type* A A A C A A A A A A A C A B A A Input is sinking Output is sourcing Output is sourcing Output is sourcing Output is sourcing Output is sourcing Output is sourcing Output is sourcing IOUT = 250 mA total ROUT to VCC-Rail RIN is to GND Temperature stabilized ENABLE = Low NE2=NE3=NE4=High IIR=0 A, II2=II3=II4= 500 A NE2=NE3=NE4=Low, IIR=II2=II3=II4= 0 A IOUT = 40 mA, VCC = 5 V 10%, read only IOUT = 80 mA, 40 mA read + 40 mA write, VCC=5V10% IOUT = 40 mA, ENOSC = Low IOUT = 40 mA, read only IOUT = 80 mA, 40 mA read + 40 mA Write 8 150 200 1.68 1 1 250 W W V mA mA 14 IOFF2 IOFF3 VSER -4 4.17 4.18 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 14 5 mA A 14 -1 %/V A 4.19 14 VSEW INOO TSER TSEW -6 0 %/V nA/ rt-Hz ppm/ C ppm/ C A 4.20 4.21 4.22 14 14 14 3 -500 -600 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 GAIN) + IOS 5 4506E-DVD-09/02 Electrical Characteristics: Laser Current Amplifier Output AC Performance VCC = +5 V, IOUT = 40 mA DC with 40 mA pulse, Tamb = 25C, unless otherwise specified No. 5 5.1 5.2 5.3 5.4 Parameters Write rise time Write fall time Output current overshoot IOUT ON prop delay Test Conditions IOUT = 40 mA (read) + 40 mA (10% - 90%) (1) IOUT = 40 mA (read) + 40 mA (10% - 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 IOUT = 50 mA, all channels, -3 dB value RF = 7.5 kW RS = 560 W RF = 7.5 kW RS = 560 W ENOSC 50% LowHigh to IOUT at 50% of final value ENOSC 50% HighLow to IOUT at 50% of final value RF = 7.5 kW RS = 560 W Pin Symbol Min. Typ. Max. Unit Type* Laser Current Amplifier Output AC Performance 14 14 14 tRISE tFALL OS 1.0 1.1 5 3.0 3.0 ns ns % C C C 14 tON 2.0 ns C 5.5 IOUT OFF prop delay 14 tOFF 2.0 ns C 5.6 Disable time 14 tDIS 10 ns C 5.7 Enable time 14 tEN 50 ns C 5.10 Amplifier bandwidth 14 BWLCA 20 MHz C 6 6.1 Oscillator Oscillator frequency Oscillator temperature coefficient Disable time oscillator 14 FOSC TCOSC 255 300 350 MHz ppm/ C ns A 6.2 6.3 14 -150 C 14 TDISO 4 C 6.4 Enable time oscillator 14 TENO SOSC 35 2 ns C 6.5 Oscillator swing 14 55 mApp A *) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Load resistor at IOUT 10 W, measurement with a 50-W oscilloscope and a 39-W series resistor 6 T0820 4506E-DVD-09/02 T0820 Application Information Figure 3. Oscillator Frequency vs. Resistor RF (RS = 560 W) 550 500 450 400 350 300 250 200 4 5 6 7 8 9 10 Frequency (MHz) RF ( kOhm ) Figure 4. Oscillator Swing vs. Resistor RS (RF = 7.5 kW) 120 100 Swing (mA pk-pk) 80 60 40 20 0 0 300 600 900 1200 1500 RS ( Ohm ) Figure 5. Oscillator Frequency Depending of Swing (RS = 560 W) 60 50 Swing (mA pk-pk) 40 30 20 10 0 200 250 300 350 400 450 500 550 600 Frequency ( MHz ) 7 4506E-DVD-09/02 Figure 6. Transfer Characteristic of Channel 2 (gain = 112) 300 250 200 IOUT (mA) 150 100 50 0 0 500 1000 1500 2000 2500 3000 I2 ( A ) Figure 7. Transfer Characteristic of Channel 3 and 4 (gain = 112) 300 250 200 IOUT (mA) 150 100 50 0 0 500 1000 1500 2000 2500 3000 I3 ( A ) Figure 8. Step Response, Read Channel: 50 mA, Channel 3 = 200 mApp 8 T0820 4506E-DVD-09/02 T0820 Figure 9. Timing Diagram ENABLE NE2 NE3 NE4 tON tON tON tEN tr tr tr tOFF tOFF tOFF tf tf tf tDIS Figure 10. Typical Application Circuit VCC A n a l o g IR 1 I2 2 RF 3 I3 4 I4 5 NE2 D i g i t a l 6 NE3 7 NE4 8 9 10 VCC2 VCC 11 ENOSC 12 ENABLE 13 RS 14 GND 15 IOUT LD 16 VCC2 VCC1 9 4506E-DVD-09/02 Ordering Information Extended Type Number T0820-TCQ Package SSO16 Remarks Taped and reeled Package Information 10 T0820 4506E-DVD-09/02 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 be the trademarks of others. Printed on recycled paper. 4506E-DVD-09/02 xM |
Price & Availability of T0820
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |