Datasheet > EVAL-ADN2892EBZ

EVAL-ADN2892EBZ

更新时间： 2024-02-29 01:10:27

品牌	Logo	应用领域
亚德诺 - ADI		放大器
页数	文件大小	规格书
16页	451K
描述
3.3 V, 4.25 Gbps, Limiting Amplifier

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EVAL-ADN2892EBZ 数据手册

3.3 V, 4.25 Gbps,

Limiting Amplifier

Data Sheet

ADN2892

FEATURES

GENERAL DESCRIPTION

Input sensitivity: 3.5 mV p-p

70 ps rise/fall times

The ADN2892 is a 4.25 Gbps limiting amplifier with integrated

loss of signal (LOS) detection circuitry and a received signal

strength indicator (RSSI). This part is optimized for Fibre

Channel (FC) and Gigabit Ethernet (GbE) optoelectronic

conversion applications. The ADN2892 has a differential input

sensitivity of 3.5 mV p-p and accepts up to a 2.0 V p-p

CML outputs: 750 mV p-p differential

Bandwidth selectable for multirate 1×/2×/4× FC modules

Optional LOS output inversion

Programmable LOS detector: 3.5 mV to 35 mV

Rx signal strength indicator (RSSI)

differential input overload voltage. The ADN2892 has current

mode logic (CML) outputs with controlled rise and fall times.

SFF-8472-compliant average power measurement

Single-supply operation: 3.3 V

The ADN2892 has a selectable low-pass filter with a −3 dB

cutoff frequency of 1.5 GHz. By setting BW_SEL to Logic 0, the

filter can limit the relaxation oscillation of a low cost CD laser

used in a legacy 1 Gbps FC transmitter. The limited BW also

reduces the rms noise and in turn improves the receiver optical

sensitivity for a lower data rate application, such as 1× FC and

GbE.

Low power dissipation: 160 mW

Available in space-saving, 3 mm × 3 mm, 16-lead LFCSP

Extended temperature range: −40°C to +95°C

SFP reference design available

APPLICATIONS

1×, 2×, and 4× FC transceivers

SFP/SFF/GBIC optical transceivers

GbE transceivers

By monitoring the bias current through a photodiode, the on-

chip RSSI detector measures the average power received with

2% typical linearity over the entire valid input range of the

photodiode. The on-chip RSSI detector facilitates SFF-8472-

compliant optical transceivers by eliminating the need for

external RSSI detector circuitry.

Backplane receivers

Additional features include a programmable loss-of-signal

(LOS) detector and output squelch. The ADN2892 is available

in a 3 mm × 3 mm, 16-lead LFCSP.

FUNCTIONAL BLOCK DIAGRAM

AVCC AVEE

BW_SEL

SQUELCH

DRVEE

DRVCC

ADN2892

50W

OUTP

OUTN

NIN

ADN2882

LPF

50W

V+

10kW

3.5kW

LOS

REF

PD_VCC

RSSI/LOS

DETECTOR

ADuC7020

RSSI_OUT

PD_CATHODE

THRADJ

LOS_INV

Figure 1. RSSI Function Capable—Applications Setup Block Diagram

Rev. A

Document Feedback

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

rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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