ADN8820-REEL7

更新时间： 2024-11-19 23:14:15

品牌	Logo	应用领域
亚德诺 - ADI		光纤光纤放大器控制器
页数	文件大小	规格书
9页	289K
描述
EDFA and CW Laser Controller

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ADN8820-REEL7 数据手册

EDFA and CW Laser Controller

ADN8820^*

Preliminary Technical Data

Output Power (COP), or Constant EDFA Gain (CG). Multiple

pump laser applications are easily supported by the ADN8820.

Common-cathode-to-ground and common-anode-to-VDD

configurations are also supported.

FEATURES

Four Operational Modes Including:

Constant Laser Current

Constant Optical Output Power

Constant EDFA Gain

Constant Laser Power

High Power Efficiency: >90%

The ADN8820 has a high speed closed-loop control, making it

suitable for add/drop applications in telecommunication

systems. It has a low-current shutdown mode and a soft-start

feature to minimize power supply bounce on start-up.

Three Built-In Photodiode TIAs

Adjustable Laser Diode and EDFA Protection Limits

Free-run or Synchronous Switching Frequency Modes

Adjustable Phase Delay for Synchornous Clock Mode

Optional Dithering Built-In

Protection circuitry is built into the device. The protection

limits are easily adjustable and are used to set maximum output

current and voltage, optical output power, EDFA gain, and

pump or CW laser power.

Programmable Dither Frequency and Amplitude

The output stage consists of a high-efficiency PWM amplifier in

parallel with a high-speed linear amplifier. This provides the

fastest settling time response along with the lowest power and

heat dissipation. A pair of external MOSFETs on the PWM

amplifier provide output currents of up to 5A.

APPLICATIONS

EDFA Pump Laser Diode Control

CW Laser Bias Control

Raman Amplifiers

Three low-bias current TIAs are built-in. These allow

amplification for the laser back-facet photodiode and EDFA

input and output photodiodes. For CW laser applications, the

two unused TIAs can be used for etalon photodiode

GENERAL DESCRIPTION

The ADN8820 is a versatile Continuous Wave (CW) and EDFA

laser diode driver and controller. It provides a low noise and

precise current control for driving a source or pump laser diode.

amplification, allowing continuous wavelength monitoring.

The ADN8820 is available in a 7 x 7 mm lead-frame chip scale

package (LFCSP) with a package height of less than 1 mm.

It can be set to operate in one of four controller modes:

Constant Current (CC), Constant Laser Power (CLP), Constant

FUNCTIONAL BLOCK DIAGRAM

^*U.S. Patent Pending

Rev. PrB

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.

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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