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| Features * * * * * * * * * * * * * * Current-controlled Output Current Source, 3 Input Channels Low-power Consumption Output Current per Channel to 250 mA Total Output Current to 300 mA Rise Time 1.0 ns, Fall Time 1.1 ns On-chip RF Oscillator Control of Frequency and Swing by Use of 2 External Resistors Oscillator Frequency Range from 200 MHz to 500 MHz Oscillator Swing to 100 mA Fast Settling APC Amplifier Single 5 V Power Supply Common Enable, Disable Input TTL/CMOS Control Signals Small SSO16 Package 3-Channel Laser Driver with RF Oscillator T0816 Applications * CD-RW Drives * Writable Optical Drives Description The T0816 is a laser diode driver for the operation of a grounded laser diode for CD-RW 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 at the IOUT pin. Each channel can contribute up to 250 mA to the total output current of up to 300 mA. A total gain of 100 (read channel), 250 (channel 2) and 150 (channel 3) are provided between each reference current input and the 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. 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 switchoff is achieved by a `low' at the ENABLE input. Rev. 4505C-DVD-09/02 1 Figure 1. Block Diagram I3 NE3 Channel 3 I2 NE2 IR NER ENABLE Channel 2 IOUT Read channel ENOSC RF oscillator RF RS Pin Configuration Figure 2. Pinning SSO16 1 2 3 4 16 15 14 13 IR I2 GND RF I3 NER NE2 NE3 VCC1 VCC2 IOUT GND RS ENABLE ENOSC VCC2 T0816 5 6 7 8 12 11 10 9 2 T0816 4505C-DVD-09/02 T0816 Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol IR I2 GND RF I3 NER NE2 NE3 VCC2 ENOSC ENABLE RS GND IOUT VCC2 VCC1 Type analog analog supply 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 Ground External resistor to GND sets oscillator frequency Input current, bias voltage approximately GND Digital control of read channel (low active) Digital control of channel 2 (low active) Digital control of channel 3 (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 Absolute Maximum Ratings Parameters Supply voltage Input voltage at IR, I2, I3 Input voltage at NER, NE2, NE3, 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 + 2.0 -0.5 to VCC + 0.5 -0.5 to VCC -1 0.7 (1) to 1 (2) 150 -65 to +125 Unit V V V V W C C 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 Symbol VCC IIR/II2/II3 Value 4.5 to 5.5 < 2.5 Unit V mA 3 4505C-DVD-09/02 Operating Range (Continued) Parameters External resistor to GND to set oscillator frequency External resistor to GND to set oscillator swing Operating temperature range Symbol RF RS Tamb Value >3 >1 0 to +70 Unit kW kW C Electrical Characteristics: General VCC = 5 V, Tamb =25C, ENABLE = High, NER = Low, NE2 = NE3 = 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 = Low IIR = 500 A, II2 = 200 A, II3 = 333 A IIR = 500 A, II2 = 200 A, II3 = 333 A, ENOSC = High, RS = 8.2 kW, RF = 6.8 kW IIR = 500 A, II2 = 200 A, II3 = 333 A, NE2 = NE3 = Low IIR = II2 = II3 = 0 A 9; 15; 16 9; 15; 16 9; 15; 16 ICCR2 90 mA A ICCPD2 ICCR1 0.3 mA A Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 86 mA A 1.3 1.4 Supply current, write mode 9; 15; 16 ICCW 175 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 Supply current, input off Digital Inputs NER/NE2/NE3 low voltage NER/NE2/NE3 high voltage ENABLE low voltage ENABLE high voltage ENOSC low voltage ENOSC high voltage 9; 15; 16 6, 7, 8 6, 7, 8 11 11 10 10 ICCoff 15 mA A VNELO VNEHI VENLO VENHI VEOLO VEOHI 3.0 2.7 2.0 1.3 V V A A A A A A 0.5 0.5 V V V V Current at Digital Inputs NER/NE2/NE3 low current NER/NE2/NE3 high current ENABLE low current ENABLE high current ENOSC low current ENOSC high current NE = 0 V NE = 5 V ENABLE = 0 V ENABLE = 5 V ENOSC = 0 V ENOSC = 5 V 6, 7, 8 6, 7, 8 11 11 10 10 INELO INEHI IENLO IENHI IEOLO IEOHI -100 800 -150 100 -300 800 A A A A A A A A A A A A *) Type means: A =100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 4 T0816 4505C-DVD-09/02 T0816 Electrical Characteristics: Laser Amplifier VCC = 5 V, Tamb = 25C, ENABLE = High, unless otherwise specified No. 4 4.1 4.2 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 Output IOUT Total output current Output current per channel IOUT series resistance Best fit current gain IR Best fit current gain I2 Best fit current gain I3 Best fit current offset Output current linearity IIN input impedance IIN input impedance IIN input impedance NE threshold Output off current 1 Output off current 2 Output is sourcing Output is sourcing Total ROUT to VCC rail Channel R (1) Test Conditions Pin 14 14 14 14 14 14 14 14 1 2 5 6, 7, 8 14 14 Symbol IOUT IOUTR ROUT GAINR GAIN2 GAIN3 IOS ILIN RIN,IR RIN,I2 RIN,I3 VTH IOFF1 IOFF2 Min. 300 250 Typ. 350 Max. Unit mA mA Type* A A C A A A A A A A A B A A 6 90 225 135 -8 -3 400 1000 600 500 1250 750 1.68 1 100 250 150 130 325 195 +4 +3 600 1500 900 W mA/mA mA/mA mA/mA mA % W W W V mA Channel 2 (1) Channel 3 (1) Any channel (1) Any channel (1) RIN,IR is to GND RIN,I2 is to GND RIN,I3 is to GND Temperature stabilized ENABLE = Low NE2 = NE3 = High, IIR = 0, II2 = 200 A, II3 = 333 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 1 mA 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 14 IOFF3 VSER -4 5 mA A A 1 %/V A 4.19 14 VSEW 14 14 TSER 14 TSEW -400 -400 ppm/C ppm/C INOO -6 0 %/V nA/ rt-Hz 4.20 4.21 3 C C 4.22 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 4505C-DVD-09/02 Electrical Characteristics: Laser Current Amplifier Outputs 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 Output AC Performance Write rise time Write fall time Output current overshoot IOUT ON propagation delay IOUT OFF propagation delay Disable time 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 IOUT = 50 mA, all channels, -3 dB value RF = 7.5 kW RF = 7.5 kW ENOSC 50% HighLow to IOUT at 50% of final value ENOSC 50% LowHigh to IOUT at 50% of final value 14 14 14 14 tON 14 tOFF 14 tDIS 14 tEN 14 BWLCA 20 ns C 20 ns C 2 ns C 2 ns C tRISE tFALL OS 1.0 1.1 5 2.0 2.0 ns ns % C C C Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 5.5 5.6 5.7 Enable time 5.8 6 6.1 6.2 6.3 Amplifier bandwidth Oscillator Oscillator frequency Osc. temperature coefficient Disable time oscillator 16 MHz C 14 14 14 FOSC TCOSC TDISO 255 300 -150 350 MHz ppm/C A C 4 ns C 6.4 Enable time oscillator 14 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 T0816 4505C-DVD-09/02 T0816 Characteristic 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 ( kOhm ) 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 ( kOhm ) 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 4505C-DVD-09/02 Figure 6. Transfer Characteristic of Channel 2 (gain = 278, load resistor at IOUT = 6.8 W) 400 350 300 y = 0.2783x - 3.3199 Vcc = 5.5 V Vcc = 5.0 V Vcc = 4.5 V IOUT (mA) 250 200 150 100 50 0 0 200 400 600 800 1000 1200 1400 1600 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 8 T0816 4505C-DVD-09/02 T0816 Figure 8. Step Response, Read Channel: 50 mA, Channel 2: 50 mApp Figure 9. Step Response, Read Channel: 50 mA, Channel 2: 250 mApp 9 4505C-DVD-09/02 Figure 10. Timing Diagram of IOUT ENABLE NER NE2 NE3 tON tEN tON tr tr tOFF tOFF tDIS tf tf Figure 11. Application Circuit A n a l o g __ D i g i t a l IR 1 I2 2 GND 3 RF 4 I3 5 NER 6 NE2 7 NE3 8 9 10 11 ENOSC VCC2 VCC 12 ENABLE 13 RS 14 GND 15 IOUT 16 VCC2 LD VCC1 VCC 10 T0816 4505C-DVD-09/02 T0816 Ordering Information Extended Type Number T0816-TCQ Package SSO16 Remarks Taped and reeled Package Information 11 4505C-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. 4505C-DVD-09/02 xM |
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