AD9665ACPZ-REEL7 Analog Devices Inc, AD9665ACPZ-REEL7 Datasheet

Reverse Logic Pad Up

AD9665ACPZ-REEL7

Manufacturer Part Number
AD9665ACPZ-REEL7
Description
Reverse Logic Pad Up
Manufacturer
Analog Devices Inc
Type
Laser Diode Driver (CD/DVD)r
Datasheet

Specifications of AD9665ACPZ-REEL7

Number Of Channels
4
Voltage - Supply
4.5 V ~ 5.5 V
Package / Case
32-VFQFN, CSP Exposed Pad
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
AD9665ACPZ-REEL7TR
FEATURES
Dual, current-controlled output current sources with 4 input
TTL-selectable output
Stable on-chip oscillators with independent frequency and
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
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.
channels
amplitude control
supercombo drives
Laser Diode Driver with Oscillator
4-Channel, LVDS, Dual-Output,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
For more information on the AD9665, email Analog Devices, Inc.
at
W3DISN
W2DISN
W1DISN
high_current_drivers.com@analog.com.
OSCEN
W3SET
W2SET
W1SET
W3DIS
W2DIS
W1DIS
RSET
RDIS
Figure 2. 4-Channel, LVDS, Laser Driver Pin Configuration
Figure 1. 4-Channel, LVDS, Laser Driver Block Diagram
FUNCTIONAL BLOCK DIAGRAM
F
*TTL ACTIVE LOW SEE TABLE 3
ADJ1
W3DISN
W2DISN
W1DISN
W3DIS*
W2DIS*
W1DIS*
GND
GND
READ CHANNEL
OSCILLATOR
F
CHANNEL 3
CHANNEL 2
CHANNEL 1
ADJ2
1
2
3
4
5
6
7
8
WRITE
WRITE
WRITE
© 2005 Analog Devices, Inc. All rights reserved.
A
ADJ1
(Not to Scale)
5mm
AD9665
A
LFCSP
ADJ2
×
5mm
INS
OUTSEL
24
23
22
21
20
19
18
17
AD9665
OUTPUT A
OUTPUT B
www.analog.com
INS
V
LD1
LD1
GND
LD2
LD2
V
DD
DD
ENABLE
LD1
LD2

Related parts for AD9665ACPZ-REEL7

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 ...

Related keywords