AD9662

更新时间： 2022-11-24 21:40:14

品牌	Logo	应用领域
亚德诺 - ADI		振荡器驱动器二极管激光二极管
页数	文件大小	规格书
2页	66K
描述
3-Channel Laser Diode Driver with Oscillator

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AD9662 数据手册

3-Channel Laser Diode Driver

with Oscillator

AD9662

FEATURES

FUNCTIONAL BLOCK DIAGRAM

Current controlled current source

with 3 input channels

IN3

OUTEN3

CHANNEL 3

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

IN2

OUTEN2

CHANNEL 2

Low power consumption

OUTPUT

ENABLE

OUT

INR

READ CHANNEL

OUTENR

APPLICATIONS

CD-RW drives

DVD-RW, DVD+RW, MO drives

Laser diode current switching

OSCEN

OSCILLATOR

GENERAL DESCRIPTION

Figure 1. AD9662 3-Channel Laser Diode Driver

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_OUTpin. Each

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.

INR

IN2

GND

OUT

13 GND

AD9662

IN3

OUTENR

OUTEN2

OUTEN3

11 ENABLE

10 OSCEN

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.

Figure 2. QSOP-16 Pinout

For more information about the AD9662, contact Analog Devices,

Inc. via email at: high_current_drivers.com@analog.com.

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

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