IC LASER DIODE DRIVER 3CH 16QSOP

AD9662ARQZ-REEL

Manufacturer Part NumberAD9662ARQZ-REEL
DescriptionIC LASER DIODE DRIVER 3CH 16QSOP
ManufacturerAnalog Devices Inc
TypeLaser Diode Driver (CD/DVD)
AD9662ARQZ-REEL datasheet
 

Specifications of AD9662ARQZ-REEL

Number Of Channels3Voltage - Supply4.5 V ~ 5.5 V
Operating Temperature0°C ~ 85°CPackage / Case16-LSSOP (0.154", 3.91mm Width)
Mounting TypeSurface MountOperating Supply Voltage (max)5.5V
Operating Temperature (min)0CMountingSurface Mount
Operating Temperature ClassificationCommercialLead Free Status / RoHS StatusLead free / RoHS Compliant
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FEATURES
Current-controlled current source
with 3 input channels
Output current for Channel 3—315 mA
Output current for other channels—210 mA
Rise time/fall time of 0.8 ns
On-chip oscillator
Single 5 V power supply (±10%)
Low output overshoot
Low power consumption
APPLICATIONS
CD-RW drives
DVD-RW, DVD+RW, MO drives
Laser diode current switching
GENERAL DESCRIPTION
The AD9662 is a laser diode driver for high performance CD
and DVD recordable drives. It includes three channels for three
different optical power levels: the read channel generates a
continuous output power level, whereas Channel 2 and
Channel 3 are used as write channels having 0.8 ns rise/fall
times. All channel currents are summed at the I
channel’s output current is established by multiplying the
channel’s gain by the channel’s input current. The input current
for each of the input channels—INR, IN2, and IN3—can be set
either by using an external resistor that converts an input
voltage to a current or by directly using a current source.
An on-chip oscillator is provided to allow output current
modulation (to reduce laser mode hopping). Two external
resistors control the frequency and the amplitude swing of the
oscillator. The push-pull oscillator can swing up to 100 mA p-p
and has a frequency range of 200 MHz to 500 MHz.
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
3-Channel Laser Diode Driver
FUNCTIONAL BLOCK DIAGRAM
IN3
OUTEN3
IN2
OUTEN2
INR
OUTENR
OSCEN
Figure 1. AD9662 3-Channel Laser Diode Driver
pin. Each
OUT
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
with Oscillator
AD9662
CHANNEL 3
CHANNEL 2
I
OUTPUT
OUT
ENABLE
READ CHANNEL
OSCILLATOR
R
R
F
S
www.analog.com
© 2005 Analog Devices, Inc. All rights reserved.

AD9662ARQZ-REEL Summary of contents

  • Page 1

    FEATURES Current-controlled current source with 3 input channels Output current for Channel 3—315 mA Output current for other channels—210 mA Rise time/fall time of 0.8 ns On-chip oscillator Single 5 V power supply (±10%) Low output overshoot Low power consumption ...

  • Page 2

    AD9662 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 REVISION HISTORY 11/05—Rev. SpB to Rev. C Changes to ...

  • Page 3

    SPECIFICATIONS = 5 V, ENABLE = 1, OSCEN = 0, OUTENx = 1, unless otherwise stated AMB CC Table 1. Parameter LASER AMPLIFIER Output Current Read Channel Output Current Channel 2 Output Current Channel 3 Total ...

  • Page 4

    AD9662 Parameter LOGIC SPECIFICATIONS Logic HI Threshold Logic LO Threshold Input Impedance Input Leakage Current SUPPLY CURRENT Power-Down Power-Up Inputs Disabled Inputs Disabled, OSC Enabled 3 Read Mode, OSC Enabled OUT 3 Write Mode I = ...

  • Page 5

    ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage +V S Pin 9, Pin 15, and Pin 16 Input Pins Pin 1 and Pin 2 Pin 5 Pin 6, Pin 7, Pin 8, Pin 10, and Pin 11 1 Internal Power ...

  • Page 6

    AD9662 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 INR Input Current Pin for the Read Channel. Has a typical input impedance of 200 Ω. 2 IN2 Input Current Pin for Write Channel ...

  • Page 7

    TYPICAL PERFORMANCE CHARACTERISTICS R = 23.7 kΩ 9.53 kΩ, and read channel output current is 50 mA, unless otherwise noted 500 400 300 200 100 RESISTANCE (kΩ) F Figure 3. Oscillator ...

  • Page 8

    AD9662 –40 – TEMPERATURE (°C) Figure 9. Oscillator Amplitude vs. Temperature 10ns/DIV Figure 10. Optical Response 50 mA Read Write2, Sharp GH0781JA2C Diode 225 200 175 150 125 100 75 ...

  • Page 9

    Table 4. I Control OUT ENABLE OUTENR Table 5. Oscillator Control ENABLE OSCEN OUTEN2 OUTEN3 ...

  • Page 10

    AD9662 APPLICATIONS The AD9662 uses the current at one or more of its three inputs— and I —and generates an output current INR IN2 IN3 proportional to the input currents. Channel R has a typical gain of ...

  • Page 11

    The change in junction temperature can then be determined ΔV /(1.9 mV/° AD9662 – V1 ENR 1M Ω 10V Figure 15. Junction Temperature ...

  • Page 12

    AD9662 EVALUATION BOARD VINR C3 R2 VINR 4.32kΩ 0.1μF VINW2 C2 R3 VIN2 4.32kΩ 0.1μF VINW3 C4 R5 VIN3 4.32kΩ 0.1μF ENR 50Ω DNI EN2 50Ω DNI EN3 50Ω DNI Note: ...

  • Page 13

    ... OUTLINE DIMENSIONS 0.010 0.004 COPLANARITY ORDERING GUIDE Model Temperature Range AD9662ARQZ 1 0°C to 85°C 1 AD9662ARQZ-REEL 0°C to 85°C 1 AD9662ARQZ-REEL7 0°C to 85° Pb-free part. 0.197 0.193 0.189 16 9 0.158 0.154 0.244 0.150 1 0.236 8 0.228 PIN 1 0.069 0.065 0.053 0.049 0.025 ...

  • Page 14

    AD9662 NOTES Rev Page ...

  • Page 15

    NOTES Rev Page AD9662 ...

  • Page 16

    AD9662 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C04389-0-11/05(C) Rev Page ...