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GS2974AのメーカーはGennumです、この部品の機能は「HD-LINX III Adaptive Cable Equalizer」です。 |
部品番号 | GS2974A |
| |
部品説明 | HD-LINX III Adaptive Cable Equalizer | ||
メーカ | Gennum | ||
ロゴ | |||
このページの下部にプレビューとGS2974Aダウンロード(pdfファイル)リンクがあります。 Total 16 pages
GS2974A HD-LINX™ III Adaptive Cable Equalizer
Features
• SMPTE 424M, SMPTE 292M and SMPTE 259M
compliant
• Automatic cable equalization
• 0.3UI Maximum Output Jitter at 2.97Gb/s
• Multi-standard operation from 143Mb/s to 2.97Gb/s
• Supports DVB-ASI at 270Mb/s
• Small footprint (4mm x 4mm)
• Pb-free and RoHS compliant
• Manual bypass (useful for low data rates with slow
rise/fall times)
• Performance optimized for 1.485Gb/s and 2.97Gb/s
• Typical equalized length of Belden 1694A cable: 120m
at 2.97Gb/s, 200m at 1.485Gb/s, and 350m at 270Mb/s
• 50Ω differential output (internal 50Ω pull-ups)
• Programmable mute based on max cable length adjust
• Single 3.3V power supply operation
• Operating temperature range: 0°C to +70°C
Applications
• SMPTE 424M, SMPTE 292M and SMPTE 259M Coaxial
Cable Serial Digital Interfaces.
Description
The GS2974A is a high-speed BiCMOS integrated circuit
designed to equalize and restore signals received over 75Ω
co-axial cable.
The GS2974A is designed to support SMPTE 424M, SMPTE
292M and SMPTE 259M, and is optimized for performance
at 1.485Gb/s and 2.97Gb/s.
The GS2974A features DC restoration to compensate for
the DC content of SMPTE pathological test patterns.
A voltage programmable mute threshold (MCLADJ),
applicable for SD mode (refer to Section 4.3), is included to
allow muting of the GS2974A output when an approximate
selected cable length is reached for SMPTE 259M signals.
This feature allows the GS2974A to distinguish between
low amplitude SD-SDI signals and noise at the input of the
device. The serial digital outputs of the GS2974A may be
forced to a mute state by applying a voltage to the MUTE
pin.
Power consumption is typically 215mW using a 3.3V
power supply. The GS2974A is lead-free, and the
encapsulation compound does not contain halogenated
flame retardant.
This component and all homogeneous subcomponents are
RoHS compliant.
MCLADJ
SDI
SDI
CABLE LENGTH ADJUSTOR
CARRIER
DETECT MUTE
EQUALIZER
DC RESTORE
OUTPUT
AGC
GS2974A Functional Block Diagram
GS2974A HD-LINX™ III Adaptive Cable Equalizer
Data Sheet
42216 - 3
January 2009
www.gennum.com
CD
MUTE
BYPASS
SDO
SDO
1 of 16
Free Datasheet http://www.datasheet4u.com/
1 Page Contents
Features ................................................................................................................................................................. 1
Applications ......................................................................................................................................................... 1
Description ........................................................................................................................................................... 1
Revision History .................................................................................................................................................2
1. Pin Out...............................................................................................................................................................4
1.1 GS2974A Pin Assignment ..............................................................................................................4
1.2 GS2974A Pin Descriptions .............................................................................................................4
2. Electrical Characteristics ............................................................................................................................6
2.1 Absolute Maximum Ratings ..........................................................................................................6
2.2 DC Electrical Characteristics ........................................................................................................6
2.3 AC Electrical Characteristics ........................................................................................................7
Test Circuit ...........................................................................................................................................................8
3. Input/Output Circuits ..................................................................................................................................8
4. Detailed Description.....................................................................................................................................9
4.1 Serial Digital Inputs .........................................................................................................................9
4.2 Cable Equalization ........................................................................................................................ 10
4.3 Programmable Maximum Cable Length Adjust (MCLADJ) ............................................. 10
4.4 Mute and Carrier Detect .............................................................................................................. 11
5. Application Information .......................................................................................................................... 12
5.1 PCB Layout ....................................................................................................................................... 12
5.2 Typical Application Circuit ........................................................................................................ 12
6. Package & Ordering Information .......................................................................................................... 13
6.1 Package Dimensions ..................................................................................................................... 13
6.2 Packaging Data ............................................................................................................................... 13
6.3 Recommended PCB Footprint ................................................................................................... 14
6.4 Marking Diagram ........................................................................................................................... 14
6.5 Solder Reflow Profiles .................................................................................................................. 15
6.6 Ordering Information ................................................................................................................... 15
GS2974A HD-LINX™ III Adaptive Cable Equalizer
Data Sheet
42216 - 3
January 2009
3 of 16
Free Datasheet http://www.datasheet4u.com/
3Pages 2. Electrical Characteristics
2.1 Absolute Maximum Ratings
Parameter
Supply Voltage
Input ESD Voltage
Storage Temperature Range
Input Voltage Range (any input)
Operating Temperature Range
Solder Reflow Temperature
Value
-0.3V to +3.6 VDC
2kV
-50°C < Ts < 125°C
-0.3 to (VCC +0.3)V
0°C to 70°C
260°C
2.2 DC Electrical Characteristics
Table 2-1: DC Electrical Characteristics
VCC = 3.3V ±5%, TA = 0°C to 70°C, unless otherwise shown
Parameter
Symbol Conditions
Supply Voltage
Power Consumption
Supply Current
Output Common Mode
Voltage
Input Common Mode Voltage
MCLADJ DC Voltage (to mute
signal)
VCC
PD
Is
VCMOUT
VCMIN
–
MCLADJ Range
–
CD Output Voltage
VCD(OH)
Mute Input Voltage Required
to Force Outputs to Mute
Mute Input Voltage Required
to Force Outputs Active
VCD(OL)
VMute
VMute
–
TA = 25°C
TA = 25°C
TA = 25°C
TA = 25°C
0m, TA = 25°C
TA = 25°C
Carrier not
present
Carrier present
Min to Mute
Max to
Activate
Min
3.135
–
–
–
–
–
–
2.4
–
2.0
–
Typ
3.3
215
65
VCC - ΔVSDO/2
1.75
3.2
0.5
–
–
–
–
Max
3.465
343
98
–
–
–
–
–
0.4
–
0.8
Units
V
mW
mA
V
Notes
±5%
–
–
–
V–
V–
V–
V–
V–
V–
V–
GS2974A HD-LINX™ III Adaptive Cable Equalizer
Data Sheet
42216 - 3
January 2009
6 of 16
Free Datasheet h
6 Page | |||
ページ | 合計 : 16 ページ | ||
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部品番号 | 部品説明 | メーカ |
GS2974A | HD-LINX III Adaptive Cable Equalizer | Gennum |
GS2974B | HD-LINX III Adaptive Cable Equalizer | Gennum |