Reverse Logic Pad Up

AD9665ACPZ-REEL7

Manufacturer Part NumberAD9665ACPZ-REEL7
DescriptionReverse Logic Pad Up
ManufacturerAnalog Devices Inc
TypeLaser Diode Driver (CD/DVD)
AD9665ACPZ-REEL7 datasheet
 

Specifications of AD9665ACPZ-REEL7

Number Of Channels4Voltage - Supply4.5 V ~ 5.5 V
Package / Case32-VFQFN, CSP Exposed PadMounting TypeSurface Mount
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther namesAD9665ACPZ-REEL7TR
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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 negative logic
Independent TTL oscillator enables positive logic
170 mA minimum output current for the read channel
510 mA minimum output current for Write Channel 1
330 mA minimum output current for Write Channel 2
165 mA minimum output current for Write Channel 3
950 mA typical total output current
Typical rise time/fall time of 0.8 ns
Low power consumption
Single 5 V power supply (±10%)
APPLICATIONS
DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM
supercombo drives
Magneto-optical (MO) drives
Laser diode current switching
GENERAL DESCRIPTION
The AD9665 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 an LVDS or TTL interface. The WxDIS and
RDIS pins are active low logic. The OSCEN pin is controlled by
an active high TTL signal. All active channels are summed at
the output where Write Channel 1 can contribute at least 325
mA output current, and Write Channel 2 and Write Channel 3
can contribute at least 250 mA and 150 mA, respectively. The
level of the output current is set by an external resistor, which
converts this voltage into a current at the WxSET pin.
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 distinct values for the
frequency and swing of the oscillator. 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. SpD
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
W3DIS
CHANNEL 3
W3DISN
W2SET
WRITE
W2DIS
CHANNEL 2
W2DISN
W1SET
WRITE
W1DIS
CHANNEL 1
W1DISN
RSET
READ CHANNEL
RDIS
OSCEN
OSCILLATOR
F
F
A
A
ADJ1
ADJ2
ADJ1
Figure 1. 4-Channel, LVDS, Laser Driver Block Diagram
W3DISN
1
W3DIS*
2
AD9665
GND
3
GND
4
LFCSP
5mm
W2DISN
5
(Not to Scale)
W2DIS*
6
W1DISN
7
W1DIS*
8
*TTL ACTIVE LOW SEE TABLE 3
Figure 2. 4-Channel, LVDS, Laser Driver Pin Configuration
For more information on the AD9665, email 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.
AD9665
OUTPUT A
LD1
OUTPUT B
LD2
ENABLE
INS
OUTSEL
ADJ2
24
INS
23
V
DD
LD1
22
21
LD1
×
5mm
GND
20
19
LD2
LD2
18
17
V
DD
www.analog.com

AD9665ACPZ-REEL7 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 negative logic Independent TTL oscillator enables positive logic 170 mA minimum output current ...

  • Page 2

    AD9665 © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05269F-0-12/05(SpD) Rev. SpD | Page ...