AD9664ACPDNZ-REEL [ADI]
AD9664ACPDNZ-REEL;
| 型号： | AD9664ACPDNZ-REEL |
| 厂家： | 
ADI |
| 描述： | AD9664ACPDNZ-REEL 光电二极管 |
| 文件： | 总2页 (文件大小：85K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
4-Channel LVDS Dual-Output
Laser Diode Driver with Oscillator
AD9664
FUNCTIONAL BLOCK DIAGRAM
FEATURES
W3SET
WRITE
Dual-current controlled output current sources with 4 input
channels
W3DIS
CHANNEL 3
W3DISN
TTL selectable output
Stable on-chip oscillators with independent frequency and
amplitude control
W2SET
WRITE
OUTPUT A
OUTPUT B
ENABLE
LD1
LD2
W2DIS
CHANNEL 2
W2DISN
TTL or LVDS selectable write channel enables
Independent TTL oscillator enable
150 mA minimum output current for Read Channel
325 mA minimum output current for Write Channel 1
250 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
W1SET
W1DIS
W1DISN
WRITE
CHANNEL 1
RSET
RDIS
READ CHANNEL
Low output overshoot
OSCEN
OSCILLATOR
Low power consumption
Single 5 V power supply ( 10%)
INS OUTSEL
AADJ2
FADJ1 FADJ2 AADJ1
APPLICATIONS
Figure 1. 4-Channel LVDS Laser Driver Block Diagram
DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM
supercombo drives
MO drives
Laser diode current switching
GENERAL DESCRIPTION
W3DISN
W3DIS
GND
1
2
3
4
5
6
7
8
24 INS
The AD9664 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 gener-
ates 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 OSCEN
pin is controlled by a TTL signal. All channels are summed at
the selected LD output pin where Write Channel 1 can contrib-
ute a minimum 325 mA maximum output current, and
Write Channel 2 and Write Channel 3 can contribute a mini-
mum of 250 mA and 150 mA, respectively. The level of the out-
put current is set by an external resistor, which converts this
voltage into a current at the xSET pin.
23 LVDD
22 LD1
21 LD1
20 GND
19 LD2
18 LD2
17 LVDD
AD9664
LFCSP
5mm × 5mm
(Not to Scale)
GND
W2DISN
W2DIS
W1DISN
W1DIS
Figure 2. 4-Channel LVDS Laser Driver Pin Configuration
For more information about the AD9664, contact Analog Devices
at high_current_drivers.com@analog.com.
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. SpA
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703
www.analog.com
© 2004 Analog Devices, Inc. All rights reserved.
AD9664
© 2004 Analog Devices, Inc. All rights reserved. Trademarks and regis-
tered trademarks are the property of their respective owners.
D04597–0–4/04(SpA)
Rev. SpA | Page 2 of 2
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