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GS9074AのメーカーはGennumです、この部品の機能は「Adaptive Cable Equalizer」です。 |
部品番号 | GS9074A |
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部品説明 | Adaptive Cable Equalizer | ||
メーカ | Gennum | ||
ロゴ | |||
このページの下部にプレビューとGS9074Aダウンロード(pdfファイル)リンクがあります。 Total 17 pages
GS9074A HD-LINX® II Adaptive Cable Equalizer
Features
• SMPTE 259M compliant
• Automatic cable equalization
• Multi-standard operation from 143Mb/s to 360Mb/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 270Mb/s
• Typical maximum equalized length of Belden 1694A
cable: 350m at 270Mb/s
• 50Ωdifferential output (with internal 50Ωpull-ups)
• Manual output mute or programmable mute based on
max cable length adjust
• Single 3.3V power supply operation
• Operating temperature range: 0°C to +70°C
Applications
• SMPTE 259M Coaxial Cable Serial Digital Interfaces
Description
The GS9074A is a second-generation high speed BiCMOS
integrated circuit designed to equalize and restore signals
received over 75Ωco-axial cable.
The GS9074A is designed to support SMPTE 259M, and is
optimized for performance at 270Mb/s.
The GS9074A features DC restoration to compensate for
the DC content of SMPTE pathological test patterns.
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS9074A output when an
approximate selected cable length is reached for SMPTE
259M signals. This feature allows the GS9074A to
distinguish between low amplitude SD-SDI signals and
noise at the input of the device. The serial digital outputs of
the GS9074A 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 GS9074A is lead-free, and the
encapsulation compound does not contain halogenated
flame retardant (RoHS compliant).
MCLADJ
SDI
SDI
CABLE LENGTH ADJUSTOR
CARRIER DETECT
MUTE
EQUALIZER
DC RESTORE
OUTPUT
CD
MUTE
BYPASS
SDO
SDO
AGC
Figure A: GS9074A Functional Block Diagram
GS9074A HD-LINX® II Adaptive Cable Equalizer
Data Sheet
34166 - 4
November 2009
www.gennum.com
1 of 17
Proprietary & Confidential
1 Page 1. Pin Out
1.1 GS9074A Pin Assignment
16
VEE_A 1
15 14
13
12 VEE_D
SDI 2
SDI 3
GS9074A
(top view)
11 SDO
10 SDO
VEE_A 4
5
67
9 VEE_D
8
Center Pad
(bottom of package, internally
bonded to VEE_A)
Figure 1-1: 16-Pin QFN
1.2 GS9074A Pin Descriptions
Table 1-1: Pin Descriptions
Pin Number
1, 4
Name
VEE_A
Timing
Analog
Type
Power
2, 3
SDI, SDI
Analog
5, 6 AGC, AGC Analog
Input
–
7
BYPASS
Not
Input
Synchronous
8
MCLADJ
Analog
Input
Description
Most negative power supply for analog circuitry.
Connect to GND.
Serial digital differential input.
External AGC capacitors.
(See Section 7.1 Typical Application Circuit.)
Forces the Equalizing and DC RESTORE stages into bypass mode
when HIGH. No equalization occurs in this mode.
Maximum cable length adjust.
Adjusts the approximate maximum amount of cable to be
equalized (from 0m to the maximum cable length). The output is
muted (latched to the last state) when the maximum cable length is
achieved.
NOTE: MCLADJ is only recommended for data rates up to 270Mb/s.
GS9074A HD-LINX® II Adaptive Cable Equalizer
Data Sheet
34166 - 4
November 2009
3 of 17
Proprietary & Confidential
3Pages Table 2-2: DC Electrical Characteristics (Continued)
Parameter
CD Output Voltage
Mute Input Voltage
Required to Force
Outputs to Mute
Mute Input Voltage
Required to Force
Outputs Active
Symbol
Conditions
Min
Typ
Max
Units
Notes
VCD(OH)
Carrier not
2.4
–
–
V
present
VCD(OL)
Carrier present
–
– 0.4 V
VMute
Min to Mute
2.0
–
–
V
–
–
–
VMute
Max to Activate
–
– 0.8 V
–
2.3 AC Electrical Characteristics
Table 2-3 shows the AC electrical characteristics of the GS9074A where conditions are
VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown.
Table 2-3: AC Electrical Characteristics
Parameter
Serial input data rate
Input Voltage Swing
Symbol
DRSDO
ΔVSDI
Output Voltage Swing
ΔVSDO
Maximum Equalized Cable
Length
–
–
–
–
Output Rise/Fall time
Mismatch in rise/fall time
Duty cycle distortion
Overshoot
–
–
–
–
Conditions
–
TA =25°C,
differential
100Ω load, TA
=25°C,
differential
270Mb/s,
Belden 1694A,
350m
270Mb/s,
Belden 8281,
280m
360Mb/s,
Belden 1694A,
190m
360Mb/s,
Belden 8281,
140m
20% - 80%
–
–
–
Min
143
720
–
–
–
–
–
–
–
–
–
Typ
–
800
750
0.2
0.2
0.25
0.25
80
–
–
–
Max
360
950
–
–
–
–
–
220
30
100
10
Units
Mb/s
mVp-p
Notes
–
1
mVp-p
–
UI 2
UI 2
UI 2
UI 2
ps –
ps –
ps –
%–
GS9074A HD-LINX® II Adaptive Cable Equalizer
Data Sheet
34166 - 4
November 2009
6 of 17
Proprietary & Confidential
6 Page | |||
ページ | 合計 : 17 ページ | ||
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部品番号 | 部品説明 | メーカ |
GS9074A | Adaptive Cable Equalizer | Gennum |