Features * * * * * * * * * * * * * Current-controlled Output Current Source with 5 Input Channels 2 Selectable Outputs for Grounded Laser Diodes Output Current per Channel up to 200 mA Total Output Current up to 250 mA Rise Time 1.0 ns / Fall Time 1.1 ns On-chip RF Oscillator Control of 2 Different Frequencies and Swings by Use of 4 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 SSO24 Package and HP-VFQFP-N28 Package Applications * Combo Drives (DVD + CD-RW) * DVD-RAM with CD-RW Capability * DVD-RW with CD-RW Capability Description 5-Channel Laser Driver with RF Oscillator and 2 Outputs T0800 Preliminary The T0800 is a laser diode driver for the operation of two different, grounded laser diodes for DVD-RAM (650 nm) and CD-RW (780 nm). It includes five channels for five different optical power levels which are controlled by a separate IC. The read channel generates a continuous output level. The channels 2 to 5 are provided as write channels with very fast switching speeds. When a `low' signal is applied to the NE pins, write current pulses are enabled. 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 200 mA to the total output current of up to 250 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 reduces laser mode hopping noise during read mode. Frequency and swing can be set independently for the two selectable outputs with two pairs of 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. 4503C-DVD-12/02 1 Pin Configuration Figure 1. Pinning SSO24 IR I2 I3 I4 I5 RFA RFB NE2 NE3 NE4 NE5 ENABLE 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC1 VCC2 IOUTA IOUTA GND RSA RSB IOUTB IOUTB SELA ENOSC VCC2 Pin Description: SSO24 2 Pin Symbol Type Function 1 IR Analog Input current, bias voltage approximately GND 2 I2 Analog Input current, bias voltage approximately GND 3 I3 Analog Input current, bias voltage approximately GND 4 I4 Analog Input current, bias voltage approximately GND 5 I5 Analog Input current, bias voltage approximately GND 6 RFA Analog External resistor to GND sets frequency of oscillator A 7 RFB Analog External resistor to GND sets frequency of oscillator B 8 NE2 Digital Digital control of channel 2 (low active) 9 NE3 Digital Digital control of channel 3 (low active) 10 NE4 Digital Digital control of channel 4 (low active) 11 NE5 Digital Digital control of channel 5 (low active) 12 ENABLE Digital Enables output current (high active) 13 VCC2 Supply +5 V power supply for IOUT 14 ENOSC Digital Enables RF oscillator (high active) 15 SELA Digital High: selects IOUTA, RFA, RSA Low: selects IOUTB, RFB, RSB 16/17 IOUTB Analog Output current source B for laser diode 18 RSB Analog External resistor to GND sets swing of oscillator B 19 RSA Analog External resistor to GND sets swing of oscillator A 20 GND Supply Ground 21/22 IOUTA Analog Output current source A for laser diode 23 VCC2 Supply +5 V power supply for IOUT 24 VCC1 Supply +5 V power supply for circuit T0800 4503C-DVD-12/02 T0800 I3 I2 IR nc VCC1 VCC2 VCC2 Figure 2. Pinning HP-VFQFP-N28 1 2 3 4 5 6 7 28 27 26 25 24 23 22 21 20 19 18 17 16 15 8 9 10 11 12 13 14 IOUTA IOUTA GND RSA RSB IOUTB IOUTB NE4 NE5 ENABLE VCC2 VCC2 ENOSC SELA I4 I5 RFA RFB GND NE2 NE3 Pin Description: HP-VFQFP-N28 Pin Symbol Type Function 1 I4 Analog Input current, bias voltage approximately GND 2 I5 Analog Input current, bias voltage approximately GND 3 RFA Analog External resistor to GND sets frequency of oscillator A 4 RFB Analog External resistor to GND sets frequency of oscillator B 5 GND Supply Ground 6 NE2 Digital Digital control of channel 2 (low active) 7 NE3 Digital Digital control of channel 3 (low active) 8 NE4 Digital Digital control of channel 4 (low active) 9 NE5 Digital Digital control of channel 5 (low active) 10 ENABLE Digital Enables output current (high active) 11, 12 VCC2 Supply +5 V power supply IOUT 13 ENOSC Digital Enables RF oscillator (high active) 14 SELA Digital High: selects IOUTA, RFA, RSA Low: selects IOUTB, RFB, RSB 15 IOUTB Analog Output current source B for laser diode 16 IOUTB Analog Output current source B for laser diode 17 RSB Analog External resistor to GND sets swing of oscillator B 18 RSA Analog External resistor to GND sets swing of oscillator A 19 GND Supply Ground 20 IOUTA Analog Output current source A for laser diode 21 IOUTA Analog Output current source A for laser diode 22, 23 VCC2 Supply +5 V power supply IOUT 24 VCC1 Supply 25 nc - 26 IR Analog Input current, bias voltage approximately GND 27 I2 Analog Input current, bias voltage approximately GND 28 I3 Analog Paddle - - +5 V power supply circuit Not connected Input current, bias voltage approximately GND Should be conneced with ground 3 4503C-DVD-12/02 Figure 3. Block Diagram I5 NE5 Channel 5 I4 NE4 Channel 4 I3 NE3 Channel 3 I2 NE2 Channel 2 IR ENABLE ENOSC IOUTB Read channel RF oscillator RFA RFB RSA RSB 4 IOUTA SELA T0800 4503C-DVD-12/02 T0800 Absolute Maximum Ratings Parameter Symbol Value Unit Supply voltage VCC -0.5 to +6.0 V Input voltage at IR, I2, I3, I4, I5 VIN1 -0.5 to + 0.5 V Input voltage at NE2, NE3, NE4, NE5, ENOSC VIN2 -0.5 to VCC + 0.5 V Output voltage VOUT -0.5 to VCC -1 V 0.7 (1) to 1 (2) W Power dissipation Ptot Junction temperature TJ 150 C Tstg -65 to +125 C Symbol Value (1) Unit RthJA 115 (SSO24) 35 (HP-VFQFP-N28) K/W K/W Symbol Value Unit VCC 4.5 to 5.5 V IIR, II2, II3, II4, II5 < 2.5 mA External resistor to GND to set oscillator frequency RFA, RFB >3 kW External resistor to GND to set oscillator swing RSA, RSB > 100 W Tamb 0 to +70 C Storage temperature range Notes: 1. RthJA 115 K/W, Tamb = 70C 2. RthJA 115 K/W, Tamb = 25C Thermal Resistance Parameter Junction ambient Note: 1. Measured with multi-layer test board (JEDEC standard JESD51-7) Recommended Operating Conditions Parameter Supply voltage range Input current Operating temperature range 5 4503C-DVD-12/02 Electrical Characteristics VCC = 5 V, Tamb = 25C, ENABLE = High, NE2 = NE3 = NE4 = NE5 = High, ENOSC = Low, unless otherwise specified No. 1 1.1 1.2 1.3 1.4 1.5 2 Parameters Test Conditions Pin (1) Symbol 11,12, 22, 23, 24 ICCPD2 11,12, 22, 23, 24 Unit Type* Typ. Max. 0.5 mA A ICCR1 115 mA A Power Supply Supply current, power down ENABLE = Low, NE2 = NE3 = NE4 = NE5 = Low Supply current, read mode, oscillator disabled IIR = II2 = II3 = II4 = II5 = 500 A Supply current, read mode, oscillator enabled, output A selected IIR = II2 = II3 = II4 = II5 = 500 A, ENOSC = High, RS = 560 W, RF = 7.5 kW, SELA = High 11,12, 22, 23, 24 ICCR2 120 mA A Supply current, write mode IIR = II2 = II3 = II4 = II5 = 500 A, NE2 = NE3 = NE4 = NE5 = Low 11,12, 22, 23, 24 ICCW 320 mA A Supply current, input off IIR = II2 = II3 = II4 = II5 = 0 A 11,12, 22, 23, 24 ICCoff 18 mA A V A V A V A V A Digital Inputs 2.1 NE2/NE3/NE4/NE5 low voltage 6, 7, 8, 9 VNELO 2.2 NE2/NE3/NE4/NE5 high voltage 6, 7, 8, 9 VNEHI 2.3 SELA low voltage 14 VSELALO 2.4 SELA high voltage 14 VSELAHI 2.5 ENABLE low voltage 10 VENLO 2.6 ENABLE high voltage 10 VENHI 2.7 ENOSC low voltage 13 VEOLO 2.8 ENOSC high voltage 13 VEOHI 6, 7, 8, 9 INELO 6, 7, 8, 9 INEHI 3 Min. 1.1 2.0 0.5 2.0 0.5 V A V A V A 2.0 V A -300 A A A A A A A A A A A A A A A A 2.0 0.5 Currents at Digital Inputs 3.1 NE2/NE3/NE4/NE5 low current NE = 0 V 3.2 NE2/NE3/NE4/NE5 high current NE = 5 V 3.3 SELA low current SELA = 0 V 14 ISELALO 3.4 SELA high current SELA = 5 V 14 ISELAHI 3.5 ENABLE low current ENABLE = 0 V 10 IENLO 3.6 ENABLE high current ENABLE = 5 V 10 IENHI 3.7 ENOSC low current ENOSC = 0 V 13 IEOLO 3.8 ENOSC high current ENOSC = 5 V 13 IEOHI 800 -45 150 -150 100 -100 800 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter Note: 1. Related to HP-VFQFP-N28 Package 6 T0800 4503C-DVD-12/02 T0800 Electrical Characteristics: Laser Amplifier VCC = 5 V, Tamb = 25C, ENABLE = High, unless otherwise specified No. 4 Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type* 100 130 mA/mA A Outputs IOUTA and IOUTB Best fit current gain Any channel (1) 15, 16, 20, 21 GAIN 90 Best fit current offset Any channel (1) 15, 16, 20, 21 IOS -8 +4 mA A 4.3 Output current linearity Any channel (1) 15, 16, 20, 21 ILIN -3 +3 % A 4.5 Output current per channel Output is sourcing 15, 16, 20, 21 IOUTR 200 mA A 15, 16, 20, 21 IOUT 250 mA A 170 W A V C 4.1 4.2 4.6 4.7 4.8 4.9 4.10 Total output current IIN input impedance RIN is to GND 1, 2, 26, 27, 28 RIN NE threshold Temperature stabilized 6, 7, 8, 9 VTH Output off current 1 ENABLE = Low 15, 16, 20, 21 IOFF1 1 mA A Output off current 2 NE2 = NE3 = NE4 = NE5 = High 15, 16, 20, 21 IOFF2 1 mA A Output off current 3 NE2 = NE3 = NE4 = NE5 = Low, IIR = II2 = II3 = II4 = II5 = 0 A 15, 16, 20, 21 IOFF3 5 mA A 4.11 220 270 1.68 4.12 IOUT supply sensitivity, read mode IOUT = 40 mA, VCC = 5 V 10%, read-only 15, 16, 20, 21 VSER -5 1 %V A 4.13 IOUT supply sensitivity, write mode IOUT = 80 mA, 40 mA read + 40 mA write, VCC = 5 V 10% 15, 16, 20, 21 VSEW -6 0 %V A 4.14 IOUT current output noise IOUT = 40 mA, ENOSC = Low 15, 16, 20, 21 INOO 3 nA/ rt-Hz C 4.15 IOUT temperature sensitivity, read mode IOUT = 40 mA, read only 15, 16, 20, 21 TSER -100 ppm/C C 4.16 IOUT temperature sensitivity, write mode IOUT = 80 mA, 40 mA read + 40 mA write 15, 16, 20, 21 TSEW -300 ppm/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 7 4503C-DVD-12/02 Electrical Characteristics 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 5.5 Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type* Outputs IOUTA and IOUTB, AC Performance Write rise time IOUT = 40 mA (read) +40 mA (10%-90%) (1) 15, 16, 20, 21 tRISE 1.0 3.0 ns C Write fall time IOUT = 40 mA (read) +40 mA (10%-90%) (1) 15, 16, 20, 21 tFALL 1.1 3.0 ns C Output current overshoot IOUT = 40 mA (read) + 40 mA (1) 15, 16, 20, 21 OS 5 % C IOUT ON prop delay NE 50% High-Low to IOUT at 50% of final value 15, 16, 20, 21 tON 2.0 ns C IOFF OFF prop delay NE 50% Low-High to IOUT at 50% of final value 15, 16, 20, 21 tOFF 2.0 ns C Disable time ENABLE 50% High-Low to IOUT at 50% of final value 15, 16, 20, 21 tDIS 20 ns C ENABLE 50% Low-High to IOUT at 50% of final value 15, 16, 20, 21 tEN 20 ns C 5.6 Enable time 5.7 5.8 Disable time oscillator ENOSC 50% Low-High to IOUT at 50% of final value 15, 16, 20, 21 TDISO 4 ns C 5.9 Enable time oscillator ENOSC 50% High-Low to IOUT at 50% of final value 15, 16, 20, 21 TENO 2 ns C SELA delay SELA Low-High 50% to IOUT at 50% of final value 15, 16, 20, 21 TSAH TBD ns C SELA delay SELA High-Low 50% to IOUT at 50% of final value 15, 16, 20, 21 TSAL TBD ns C 5.12 Amplifier bandwidth IOUT = 50 mA, all channels, -3 dB value 15, 16, 20, 21 BWLCA 20 MHz C 6 Oscillator 6.1 Oscillator frequency RF = 4.7 kW 15, 16, 20, 21 FOSC MHz A Oscillator temperature coefficient RF = 4.7 kW 6.2 15, 16, 20, 21 TCOSC -150 ppm/C C Disable time oscillator ENOSC 50% High-Low to IOUT , at 10%/90% of final value 15, 16, 20, 21 TDISO 4 ns C 6.3 Enable time oscillator ENOSC 50% Low-High to IOUT , at 10%/90% of final value 15, 16, 20, 21 TENO 2 ns C 6.4 5.10 5.11 380 470 560 *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 8 T0800 4503C-DVD-12/02 T0800 Application Information Oscillator Figure 4. Frequency vs. Resistor RFA and RFB (RS = 525 W) Figure 5. Swing vs. Resistor RSA and RSB (RF = 7.82 kW) Figure 6. Frequency Dependency of Swing 9 4503C-DVD-12/02 Figure 7. Transfer Characteristic of all Channels (gain = 111) Figure 8. Output Characteristic (Voltage Compliance) R(IOUT) = 5.8 W Figure 9. Output Pulse, Read: 50 mA, Write: 250 mA pk-pk 10 T0800 4503C-DVD-12/02 T0800 Figure 10. Timing Diagram of IOUT ENABLE NE2 NE3 NE4 NE5 tON tOFF tOFF tON tOFF tON IOUT tON tr tr tEN tOFF tf tDIS tf tf tr tf tr Figure 11. Application Circuit A n a l o g D i g i t a l VCC IR I2 I3 I4 I5 RFA RFB NE2 NE3 NE4 NE5 ENABLE 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VCC1 VCC2 IOUTA IOUTA GND RSA RSB IOUTB IOUTB SELA ENOSC VCC2 LD LD VCC 11 4503C-DVD-12/02 Ordering Information Extended Type Number Package Remarks T0800-TNQ SSO24 Taped and reeled T0800-PJQ HP-VFQFP-N28 Taped and reeled Package Information 5.7 5.3 Package SSO24 Dimensions in mm 8.05 7.80 4.5 4.3 1.30 0.65 24 0.15 0.15 0.05 0.25 6.6 6.3 7.15 13 technical drawings according to DIN specifications 1 12 12 T0800 4503C-DVD-12/02 T0800 13 4503C-DVD-12/02 Atmel Headquarters Atmel Operations Corporate Headquarters Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Europe Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500 Asia Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369 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 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 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 ASIC/ASSP/Smart Cards Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4-42-53-60-00 FAX (33) 4-42-53-60-01 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. 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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. 4503C-DVD-12/02 xM