IC LDD 4CH LVDS DUAL OUT 32LFCSP

AD9668ACPZ-R7

Manufacturer Part NumberAD9668ACPZ-R7
DescriptionIC LDD 4CH LVDS DUAL OUT 32LFCSP
ManufacturerAnalog Devices Inc
TypeLaser Diode Driver (CD/DVD)
AD9668ACPZ-R7 datasheet
 

Specifications of AD9668ACPZ-R7

Number Of Channels4Voltage - Supply4.5 V ~ 5.5 V
Package / Case32-VFQFN, CSP Exposed PadMounting TypeSurface Mount
Operating Supply Voltage (max)5.5VMountingSurface Mount
Lead Free Status / RoHS StatusLead free / RoHS Compliant  
1
Page 1
2
Page 2
Page 1/2

Download datasheet (71Kb)Embed
Next
FEATURES
Dual current-controlled output current sources
with 4 input channels
TTL-selectable output
Stable on-chip oscillators with independent frequency
and amplitude control
TTL- or LVDS-selectable write channel enables
TTL- or LVDS-selectable oscillator enable
150 mA minimum output current for Read Channel
275 mA minimum output current for Write Channel 1
170 mA minimum output current for Write Channel 2
150 mA minimum output current for Write Channel 3
Rise time/fall time of ≤0.8 ns
Low output overshoot
Low power consumption
Single 5 V power supply (±10%)
APPLICATIONS
DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM
supercombo drives
MO drives
Laser diode current switching
GENERAL DESCRIPTION
The AD9668 is a laser diode driver for high performance
CD-RW and DVD recordable drives. It includes four channels
for four different optical power levels; the Read Channel
generates a continuous output power level, whereas Channel 1,
Channel 2, and Channel 3 can be used as write channels that
can be controlled with either an LVDS or a TTL interface. The
OSCEN pin is also controlled by either an LVDS or a TTL
signal. All channels are summed at the selected LD output pin,
where Write Channel 1 can contribute at least 275 mA output
current, and Write Channel 2 and Write Channel 3 can contribute
at least 170 mA and 150 mA, respectively. The level of the output
current is set by an external resistor that converts an input voltage
into a current at the xSET pins.
An on-chip oscillator is provided to allow output current
modulation and to reduce laser mode hopping. Four external
resistors permit the setting of two different values for both
oscillator frequency and amplitude, one for each output. The
oscillator can output up to 100 mA p-p of current (push-pull
oscillator) with a frequency range of 200 MHz to 500 MHz.
Rev. Sp0
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.
4-Channel LVDS, Dual-Output,
Laser Diode Driver with Oscillator
FUNCTIONAL BLOCK DIAGRAM
W3SET
WRITE
W3EN
CHANNEL 3
W3EN
W2SET
WRITE
W2EN
CHANNEL 2
W2EN
W1SET
WRITE
W1EN
CHANNEL 1
W1EN
RSET
RDEN
READ CHANNEL
OSCEN
OSCEN
OSCILLATOR
VDD
FADJ1 FADJ2 AADJ1 AADJ2
Figure 1. 4-Channel LVDS Laser Driver Block Diagram
W3EN*
1
W3EN
2
AD9668
GND
3
GND
4
LFCSP
5mm
W2EN*
5
(Not to Scale)
W2EN
6
W1EN*
7
W1EN
8
*ACTIVE LOW.
Figure 2. 4-Channel, LVDS, Laser-Driver Pin Configuration
For more information about the AD9668, contact
Analog Devices, Inc. at high_current_drivers.com@analog.com.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
AD9668
OUTPUT A
LD1
OUTPUT B
LD2
INS
OUTSEL
VDD
24
INS
23
VDD
22
LD1
21
LD1
×
5mm
20
GND
19
LD2
LD2
18
VDD
17
www.analog.com

AD9668ACPZ-R7 Summary of contents

  • Page 1

    FEATURES Dual current-controlled output current sources with 4 input channels TTL-selectable output Stable on-chip oscillators with independent frequency and amplitude control TTL- or LVDS-selectable write channel enables TTL- or LVDS-selectable oscillator enable 150 mA minimum output current for Read Channel ...

  • Page 2

    AD9668 © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05444F–0–7/05(Sp0) Rev. Sp0 | Page ...