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19-3265; Rev 0; 5/04
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers
General Description
The MAX9483/MAX9484 high-performance, multimode, laser-diode drivers (LDDs) are designed for CD and DVD combination pickup heads. The drivers consist of three input channels, an RF oscillator, and two precision current-amplifier outputs to drive the CD and DVD laser diodes. The MAX9483/MAX9484 support multiple CD and DVD read/write standards, such as CD-R/RW, DVD-R, DVD+R, DVD-RW, DVD+RW, and DVD-RAM by choosing the writing control signals and input currents on these input channels. The peak total output current is 400mA with a current gain of 100 at each channel. External resistors set the oscillation frequency and output swing. The MAX9484 features an extra resistor input allowing the oscillation frequencies of the two outputs to be set separately. Additionally, the MAX9484 allows the writing control signals to be received in lowvoltage differential signal (LVDS) mode or single-ended mode to provide reliable high-speed writing. The MAX9483 is offered in 16-pin QSOP and 4mm x 4mm 16-pin thin QFN packages. The MAX9484 is offered in a 4mm x 4mm 20-pin thin QFN package. Both devices are specified for 4.5V to 5.5V supply and 0C to +70C temperature range.
Features
Dual Output Ports with Three Controlled-Current Channels Support Various Laser-Diode Driver Standards CD-R/RW, DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM, and DVD Video MAX9483 is Pin and Function Compatible with ATMEL T0806 Independent Frequency Setting for the Two Output Ports (MAX9484) Accepts Differential (LVDS) or Single-Ended Inputs for Writing Data (MAX9484) Enable Control High-Current Swing Up to 270mA for the Reading Current High 400mA Total Peak Writing Current Adjustable Modulation Frequency from 100MHz to 600MHz Fast Output-Current Pulse Rise and Fall Time 1.0ns (typ) 4.5V to 5.5V Single-Supply Voltage No External Reference Clock Required 0C to +70C Commercial Temperature Range
MAX9483/MAX9484
Applications
Laser Diode Driver for CD-RW and DVD Combos: CD-R/RW, DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM DVD Video Recorders High-Power and High-Speed Laser-Writable Device Drivers
Pin Configurations
TOP VIEW
IN1 1 IN2 2 IN3 3 RF 4 NE2 5 NE3 6 ENABLE 7 ENOSC 8 16 VCC 15 OUT1 14 GND
Ordering Information
PART MAX9483CEE MAX9483CTE* MAX9484CTP TEMP RANGE 0C to +70C 0C to +70C 0C to +70C PIN-PACKAGE 16 QSOP 16 Thin QFN 20 Thin QFN
MAX9483
13 RS1 12 RS2 11 OUT2 10 OUTSEL 9 VCC
*Future product--contact factory for availability.
QSOP Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
ABSOLUTE MAXIMUM RATINGS
VCC, VCCO_ to GND ..............................................-0.3V to +6.0V IN_, RF_, RS_ to GND..................................-0.3V to (VCC + 0.3V) ENABLE, ENOSC, NE2_, NE3_, OUTSEL to GND.....................................-0.3V to (VCC + 0.3V) Output Voltage at OUT1, OUT2......................-0.3V to (VCC - 1V) Continuous Power Dissipation (TA = +70C) QSOP (derate 8.3mW/C above +70C) ........................667mW TQFN (derate 16.9mW/C above +70C).....................1349mW Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C ESD Rating (Human Body Model) ................................. 2.0kV Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = VCCO_ = +4.5V to +5.5V, RL = 6.8, ENABLE = high, NE2 = NE3 = high (MAX9483), NE2_ = NE3_ = differential high (MAX9484), ENOSC = low, TA = 0C to +70C, unless otherwise noted. Typical values are at VCC = VCCO_ = +5V, TA = +25C.) (Notes 1, 2, 4)
PARAMETER POWER SUPPLY Write-Mode Supply Current ICC1 IIN1 = IIN2 = IIN3 = 500A, NE2 = NE3 = low Oscillator enabled, IIN1 = IIN2 = IIN3 = 500A, ENOSC = high, RS = 8.2k, RF = 6.8k Oscillator disabled, IIN1 = IIN2 = IIN3 = 500A Supply Current Power-Down Supply Current ICC3 ICC4 Input disabled, IIN1 = IIN2 = IIN3 = 0 ENABLE = NE2 = NE3 = low, IIN1 = IIN2 = IIN3 = 0 MAX9483 MAX9484 MAX9483 MAX9484 MAX9483 MAX9484 MAX9483 MAX9484 MAX9483 MAX9484 2.0 0.8 VIN = high or low -20 +20 50 -50 1.10 VREF + 300 VREF 300 VIN = high or low -20 +20 1.25 1.40 181 182 91 92 82 83 14 14 0.96 1.2 200 210 100 105 95 95 20 20 2.0 2.0 mA mA mA mA SYMBOL CONDITIONS MIN TYP MAX UNITS
Read-Mode Supply Current
ICC2
DIGITAL INPUTS FOR WRITE CHANNEL CONTROL (NE2, NE3) (MAX9483) High-Level Input Voltage Low-Level Input Voltage Input Current Differential Input High Threshold Differential Input Low Threshold Reference Voltage High-Level Input Voltage Low-Level Input Voltage Input Current VIH1 VIL1 IIN1 VTH VTL VREF VIH2 VIL2 IIN2 V V A mV mV V mV mV A
LVDS DIGITAL INPUTS FOR WRITE CHANNEL CONTROL (NE2_, NE3_) (MAX9484)
SINGLE-ENDED DIGITAL INPUTS FOR WRITE CHANNEL CONTROL (NE2+, NE3+) (MAX9484)
2
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Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = VCCO_ = +4.5V to +5.5V, RL = 6.8, ENABLE = high, NE2 = NE3 = high (MAX9483), NE2_ = NE3_ = differential high (MAX9484), ENOSC = low, TA = 0C to +70C, unless otherwise noted. Typical values are at VCC = VCCO_ = +5V, TA = +25C.) (Notes 1, 2, 4)
PARAMETER High-Level Input Voltage Low-Level Input Voltage Input Current ANALOG INPUTS (IN1, IN2, IN3) Current Channel Input Current Range Current Channel Input Impedance OUTPUTS (OUT1 and OUT2) Maximum Total Output Current Maximum Output Current per Channel Best-Fit Current Gain Best-Fit Current Offset Output Current Linearity IOFF1 Output Off Current IOFF2 IOFF3 Read-Mode Output Supply Sensitivity Write-Mode Output Supply Sensitivity Read-Mode Output Temperature Sensitivity Write-Mode Output Temperature Sensitivity Output Noise IOUT IOUT AI IOFFSET Read current IN1 Write current IN2, IN3 Any channel (Note 3) Any channel (Note 3) Any channel (Note 3) ENABLE = low NE2 = NE3 = high, IIN1 = 0A, IIN2 = IIN3 = 500A NE2 = NE3 = low, IIN1 = IIN2 = IIN3 = 0A IOUT = 40mA IOUT = 80mA IOUT = 40mA IOUT = 80mA IOUT = 40mA, ENOSC = low -2 -2 15 16 3 -4 -3 0.2 0.22 0.14 320 210 250 400 273 347 100 +4 +3 1 1.5 5 +2 +2 %/V %/V ppmC ppmC nA/Hz mA mA mA I/I mA % ICIN RIN Current flowing into IN1, IN2, or IN3 IN_ to GND 0 165 200 4.0 235 mA SYMBOL VIH3 VIL3 IIN3 VIN = high or low -10 CONDITIONS MIN 2.0 0.8 +10 TYP MAX UNITS V V A
MAX9483/MAX9484
DIGITAL INPUTS FOR CONTROL SIGNALS (ENABLE, OUTSEL, ENOSC)
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3
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
AC ELECTRICAL CHARACTERISTICS
(VCC = VCCO_ = +4.5V to +5.5V, IOUT = 40mA (read) + 40mA, RL = 6.8, ENABLE = high, NE2 = NE3 = high (MAX9483), NE2_ = NE3_ = differential high (MAX9484), ENOSC = low, TA = 0C to +70C, unless otherwise noted. Typical values are at VCC = VCCO_ = +5V, TA = +25C.) (Notes 1, 4)
PARAMETER OSCILLATOR Oscillator Frequency Oscillator Temperature Coefficient OUTPUT TIMING Write Rise Time Write Fall Time Output-Current Overshoot Output ON Propagation Delay Output OFF Propagation Delay Output Disable Time Output Enable Time Oscillator Disable Time Oscillator Enable Time tr tf OCO tON tOFF tDIS tEN tDISO tEHO tODH Channel-Select Delay tODL OUTSEL 50% high-low to IOUT at 50% of final value measured at OUT2 2.9 10 NE 50% high-low to IOUT at 50% of final value NE 50% low-high to IOUT at 50% of final value ENABLE 50% high-low to IOUT at 50% of final value at IOUT = 40mA (read) ENABLE 50% low-high to IOUT at 50% of final value at IOUT = 40mA (read) ENOSC 50% high-low to IOUT at 50% of final value at IOUT = 40mA (read) ENOSC 50% high-low to IOUT at 50% of final value at IOUT = 40mA (read) OUTSEL 50% low-high to IOUT at 50% of final value measured at OUT1 IOUT = 40mA (read) + 40mA (10% to 90%) IOUT = 40mA (read) + 40mA (90% to 10%) 0.9 1.0 5 1.0 1.0 60 60 4 25 2.9 2.0 2.0 100 100 10 50 10 ns 1.6 1.6 ns ns % ns ns ns ns ns ns fOSC RF_ = 7.5k (Note 2), IOUT = 40mA (read) RF_ = 7.5k 255 300 10 350 MHz ppm/C SYMBOL CONDITIONS MIN TYP MAX UNITS
Note 1: Current into a pin is defined as positive. Current out of a pin is defined as negative. All voltages are referenced to ground except VTH. Note 2: Maximum and minimum limits over temperature are guaranteed by design and characterization. Devices are production tested at TA = +25C. Note 3: Linearity of the amplifier is calculated using a best-fit method at three operating points of IOUT at 20mA, 40mA, and 60mA. IOUT = (IIN x GAIN) + IOFFSET. Note 4: Guaranteed by design and characterization. Limit set at 6 sigma.
4
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Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
Typical Operating Characteristics
(VCC = VCCO_ = +5V, TA = +25C, unless otherwise noted.)
OSCILLATOR FREQUENCY vs. RESISTOR RF
MAX9483 toc01
OSCILLATOR PEAK-TO-PEAK SWING vs. RESISTOR RS
MAX9483 toc02
OSCILLATOR PEAK-TO-PEAK SWING vs. FREQUENCY
90 80 70 SWING (mAP-P) 60 50 40 30
MAX9483 toc03
700 600 FREQUENCY (MHz) 500 400 300 200 100 3 4 5 6 7 8 9 10 11
80 70 60 SWING (mAP-P) 50 40 30 20 10 0
100
20 10 0 3 4 5 6 7 8 9 10 200 250 300 350 400 450 500 550 600 FREQUENCY (MHz) RS (k)
12
RF (k)
OSCILLATOR FREQUENCY vs. TEMPERATURE
MAX9483 toc04
OUTPUT CHANNEL CURRENT vs. INPUT CURRENT (IIN1 = IIN2 = IIN3)
400 350 300 IOUT (mA) 250 200 150 100 50 0 VCC = 4.75V VCC = 5.25V VCC = 5.0V
MAX9483 toc05
320 315 310 FREQUENCY (MHz) 305 300 295 290 285 280 0 10 20 30 40 50 60
450
70
0
300
600
900
1200
1500
TEMPERATURE (C)
IIN_ (A)
OUTPUT VOLTAGE COMPLIANCE
MAX9483 toc06
50mA +50mA PULSE (10ns)
MAX9483 toc07
350 300 250 IOUT (mA) 200 150 100 50 0 0 1 2 3 4 5
TIME (5ns/div)
VCC - VOUT (V)
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5
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
Pin Description
PIN MAX9483 QSOP 1 2 3 4 5 6 7 8 9, 16 10 11 12 13 14 15 -- -- -- -- -- -- -- -- -- -- TQFN 15 16 1 2 3 4 5 6 14 8 9 10 11 -- 12 -- -- -- -- -- -- 7 13 -- EP MAX9484 TQFN 18 19 20 -- -- -- 8 9 17 11 12 13 14 -- 15 1 2 3 4 6 7 10 16 5 EP IN1 IN2 IN3 RF NE2 NE3 ENABLE ENOSC VCC OUTSEL OUT2 RS2 RS1 GND OUT1 RF1 RF2 NE2+ NE2NE3+ NE3VCCO2 VCCO1 REF EP Channel 1 Input Current (Read Channel) Channel 2 Input Current (Write Channel) Channel 3 Input Current (Write Channel) Oscillator Frequency-Setting Resistor. Connect an external resistor to GND to set the frequency of the oscillator for both outputs OUT1 and OUT2. Channel 2 Active-Low Digital Control Input Channel 3 Active-Low Digital Control Input LVTTL Output-Current Enable LVTTL Oscillator Enable +5V Power Supply. Bypass to GND with 0.1F and 0.01F capacitors with the 0.01F capacitor as close to the pin as possible. LVTTL Output Select. Drive high to select output 1; pull low to select output 2. Output Current 2 Output 2 Oscillator Current Swing-Setting Resistor. Connect an external resistor to GND to set the swing current of output port 2. Output 1 Oscillator Current Swing-Setting Resistor. Connect an external resistor to GND to set the swing current of output port 1. Ground Output Current 1 Output 1 Oscillator Frequency-Setting Resistor. Connect an external resistor to GND to set the frequency of the oscillator for OUT1. Output 2 Oscillator Frequency-Setting Resistor. Connect an external resistor to GND to set the frequency of the oscillator for OUT2. Noninverting Channel 2 LVDS or Single-Ended Digital Control Input Inverting Channel 2 LVDS or Reference for Single-Ended Digital Control Input Noninverting Channel 3 LVDS or Single-Ended Control Digital Input Inverting Channel 3 LVDS or Reference for Single-Ended Control Digital Input +5V Power Supply for Output 2. Bypass to GND with 0.1F and 0.01F capacitors with the 0.01F capacitor as close to pin as possible. +5V Power Supply for Output 2. Bypass to GND with 0.1F and 0.01F capacitors with the 0.01F capacitor as close to the pin as possible. Reference Voltage for Single-Ended Input. Connect a 0.1F decoupling capacitor to ground. Exposed Pad. Connect to ground. NAME FUNCTION
6
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Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
H ENABLE L H NE2 L H NE3 L tON tOFF
IOUT tEN
tON
tOFF
tDIS tr tr tf tf
TIME
Figure 1. Timing Diagram of Output vs. Control Signals
Detailed Description
Read Channel and Write Channels
The MAX9483/MAX9484 high-performance multimode LDDs are designed for CD and DVD combination pickup heads. The drivers have three current channels. Each channel has a current input IN_ (_ = 1, 2, or 3) and a channel control signal (ENABLE, NE2, or NE3). IN1 supplies the reference for the read channel, which provides the read current or the offset current to the lasers. The other two channels are the write channels. The currents of these two channels are superimposed on the read current that serves as the offset current for the laser in write mode. The offset current significantly reduces the laser output ramp-up time. When ENABLE is low, all three channels are disabled. Driving ENABLE high enables the read channel and leaves the other two write channels to be controlled by NE2 and NE3 (see Figure 1). By selecting the input currents at IN2 and
IN3, as well as the signal timing of NE2 and NE3, the drivers can generate various current waveforms for different CD/DVD writing standards. All three channels have a current gain of 100. The maximum total current each output can provide is 400mA.
RF Oscillator
To reduce the laser-mode hopping noise in read mode, modulate the read current with an oscillator with a 100MHz to 600MHz frequency. An external resistor, RF, determines the oscillator frequency selection. For the MAX9484, two external resistors, R F1 and R F2 , are used to select the oscillator frequency for CD and DVD lasers separately. The swing amplitude of the oscillator current is set by two external resistors, RS1 and RS2, one for CD and one for DVD. The oscillator is enabled when both ENABLE and ENOSC are driven high.
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7
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
Applications Information
LVDS Inputs for MAX9484
The MAX9484 input control signals, NE2_ and NE3_, are compatible with LVDS or single-ended inputs. The LVDS inputs allow the driver to handle higher data writing rates. When using single-ended input signals, such as LVTTL or SSTL_2, connect NE2- and NE3- to REF.
Laser Safety and IEC 825
Using the MAX9483/MAX9484 laser drivers alone does not ensure that a transmitter design is compliant with IEC 825. The entire transmitter circuit and component selections must be considered. Customers must determine the level of fault tolerance required by their application. Note that Maxim products are not designed or authorized for use as components in systems intended for surgical implantation into the body, for applications intended to support or sustain life, or for any other application where the failure of a Maxim product could create a situation where personal injury or death may occur.
CONTROL CHANNEL 3 IN3 ENABLE NE3 CONTROL CHANNEL 2 IN2 ENABLE NE2 READ CHANNEL IN1 ENABLE
CONTROL CHANNEL 3
MAX9483
OUT1 OUT2
IN3 NE3+ NE3CONTROL CHANNEL 2 IN2 NE2+ NE2READ CHANNEL IN1 ENABLE ENABLE ENABLE ENABLE
MAX9484
OUT1 OUT2
ENABLE RF OSCILLATOR VOLTAGE REFERENCE
ENOSC
RF OSCILLATOR
ENOSC REF
RF
RS1
RS2
OUTSEL
RF1
RF2
RS1 RS2
OUTSEL
Figure 2. MAX9483 Functional Diagram
Figure 3. MAX9484 Functional Diagram
8
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Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
+5V CORE LOGIC SUPPLY
+5V OUTPUT SUPPLY
IN3
IN2
IN1
VCC
RS1 RS2 RS2 CONTROL SIGNALS AND CURRENT INPUTS SINGLEENDED INPUTS NE2 NE3
VCC
RS1
OUT1 RF RF LD1
MAX9483
OUT2 ENABLE ENOSC OUTSEL LD2
Figure 4. MAX9483 Typical Operating Circuit
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9
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
+5V CORE LOGIC SUPPLY
+5V OUTPUT1 SUPPLY
IN3
IN2
IN1
RF1 RF2 RF1 NE2+ CONTROL SIGNALS AND CURRENT INPUTS 100 NE2-
VCCO1
VCC
RF1
OUT1 RS1 RS1 RS2 LD1 RS2 OUT2
MAX9484
ENABLE
OUTSEL ENOSC VCCO2 LD2
NE3+
LVDS INPUTS
REF
100
NE3-
+5V OUTPUT2 SUPPLY
Figure 5. MAX9484 Typical Operating Circuit with LVDS Inputs
10
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Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
+5V CORE LOGIC SUPPLY
+5V OUTPUT1 SUPPLY
IN3
IN2
IN1
RF1 RF2 RF2 NE2+
VCCO1
VCC
RF1
OUT1 RS1 RS1 RS2 LD1 RS2 OUT2
ENABLE
ENOSC
REF
VCCO2
NE3+
NE3-
CONTROL SIGNALS AND CURRENT INPUTS
MAX9484
SINGLEENDED INPUTS
NE2-
OUTSEL LD2
+5V OUTPUT2 SUPPLY
Figure 6. MAX9484 Typical Operation Circuit with Single-Ended Inputs
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11
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
Pin Configurations (continued)
VCCO1
VCC
IN1
IN2
IN3
IN2
IN1
13
15
14
19
16
IN3 RF NE2 NE3
1 2 3 4
12
OUT1 RS1 RS2
RF1 RF2 NE2+ NE2-
1 2 3 4 5 10 7 6 8 9
20
18
17
16 15 14
VCCO1
VCC
TOP VIEW
OUT1 RS1 RS2 OUT2 OUTSEL
MAX9483
EXPOSED PAD (GROUND)
11 10 9
MAX9484
EXPOSED PAD (GROUND)
13 12 11
OUT2 REF
6
5
7
8
ENABLE
VCCO2
NE3-
ENABLE
ENOSC
TQFN
OUTSEL
TQFN
Chip Information
TRANSISTOR COUNT: 1399
12
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ENOSC
VCCO2
NE3+
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX9483/MAX9484
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
1
2
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13
24L QFN THIN.EPS
Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers MAX9483/MAX9484
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
PACKAGE OUTLINE 12, 16, 20, 24L THIN QFN, 4x4x0.8mm
21-0139
C
2
2
14
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Dual-Output, Multimode CD-RW/DVD Laser-Diode Drivers
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
QSOP.EPS
PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH
MAX9483/MAX9484
21-0055
E
1
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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