Datasheet > GS2993

GS2993

更新时间： 2024-10-02 01:21:03

品牌	Logo	应用领域
商升特 - SEMTECH		/
页数	文件大小	规格书
23页	1838K
描述
Dual Output Adaptive Cable Equalizer

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GS2993 数据手册

GS2993

Dual Output Adaptive Cable Equalizer

Key Features

Description

•

SMPTE 424M, SMPTE 292M and SMPTE 259M

compliant

The GS2993 is a high-speed BiCMOS integrated circuit

designed to equalize and restore signals received over 75Ω

coaxial cable.

•

Automatic cable equalization

Multi-standard operation from 143Mb/s to 2.97Gb/s

The device is designed to support SMPTE 424M,

SMPTE292M and SMPTE 259M, and is optimized for

performance at 270Mb/s, 1.485Gb/s and 2.97Gb/s.

Performance optimized for 270Mb/s, 1.485Gb/s and

2.97Gb/s. Typical equalized length of Belden 1694A

cable:

The GS2993 features DC restoration to compensate for the

DC content of SMPTE pathological test patterns.

140m at 2.97Gb/s

220m at 1.485Gb/s

400m at 270Mb/s

The Carrier Detect output pin (CD) indicates whether a

valid input signal has been detected. It can be connected

directly to the SLEEP pin to enable automatic power-down

upon loss of carrier. A voltage programmable threshold,

which can be changed via the SQ_ADJ pin, forces CD high

when the input signal amplitude falls below the threshold.

This allows the GS2993 to distinguish between

low-amplitude SDI signals and noise at the input of the

device.

•

Supports DVB-ASI at 270Mb/s

Dual, independently-controlled outputs

Manual bypass (useful for low data rates with slow

rise/fall times)

•

Programmable carrier detect with squelch threshold

adjustment

Automatic power-down on loss of signal

The equalizing and DC restore stages are disengaged when

the BYPASS pin is HIGH. No equalization occurs in Bypass

mode.

Standby power <30mW (typical)

•

Differential outputs support DC coupling to 1.2V, 2.5V

or 3.3V CML logic

The GS2993 includes a gain selection pin (GAIN_SEL)

which, when tied HIGH, compensates for 6dB flat

attenuation.

•

0/6 dB gain boost selection pin

Cable Length Indicator output; varies monotonically

with input cable length

The differential outputs can be DC-coupled to Gennum

3.3V cable drivers and reclockers, and to industry-standard

1.2V, 2.5V, and 3.3V CML logic by connecting the

respective VCCO to 1.2V, 2.5V or 3.3V.

•

Selectable de-emphasis: 2dB, 4dB and 6dB

Standard EIA/JEDEC logic control and status signal

levels

•

Single 3.3V power supply operation

The GS2993 also includes programmable de-emphasis with

three operating levels in order to support long PCB traces.

207mW power consumption (typical)

Wide operating temperature range of -40ºC to +85ºC

Small footprint QFN package (4mm x 4mm)

Pb-free and RoHS compliant

The device is available in a 24-pin, 4mm x 4mm QFN

package.

Power consumption of the GS2993 is typically 207mW.

The GS2993 is Pb-free, and the encapsulation compound

does not contain halogenated flame retardant.

Applications

•

SMPTE 424M, SMPTE 292M and SMPTE 259M coaxial

This component and all homogeneous subcomponents are

RoHS compliant.

cable serial digital interfaces

1 of 23

GS2993 Dual Output Adaptive Cable Equalizer

Data Sheet

www.semtech.com

Propietary & Confidential

53966 - 4

August 2012

12 3 4 5 6 7...23

中文翻译

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