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PDF GS1524 Data sheet ( Hoja de datos )
| Número de pieza | GS1524 | |
| Descripción | HD-LINX-TM II Multi-Rate SDI Adaptive Cable Equalizer | |
| Fabricantes | Gennum Corporation | |
| Logotipo |  |
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GS1524 HD-LINX™ II
Multi-Rate SDI Adaptive
Cable Equalizer
GS1524 Data Sheet
Key Features
• SMPTE 292M, SMPTE 344M and SMPTE 259M
compliant
• automatic cable equalization
• multi-standard operation from 143Mb/s to
1.485Gb/s
• supports DVB-ASI at 270Mb/s
• manual bypass (useful for low data rates with slow
rise/fall times)
• performance optimized for 270Mb/s and 1.485Gb/s
• typical maximum equalized length of Belden 1694A
cable: 140m at 1.485Gb/s, 350m at 270Mb/s
• 50Ω differential output (with internal 50Ω pull-ups)
• Pb-free and RoHS Compliant
Key Specifications
• cable length indicator for SMPTE 259M inputs
• output mute based on max cable length adjust or
manual override
• single 3.3V power supply operation
• operating temperature range: 0°C to +70°C
Applications
• SMPTE 292M, SMPTE 344M and SMPTE 259M
Coaxial Cable Serial Digital Interfaces
Description
The GS1524 is a second-generation high-speed bipolar
integrated circuit designed to equalize and restore
signals received over 75Ω co-axial cable at data rates
from 143Mb/s up to 1.485Gb/s. The GS1524 is
designed to support SMPTE 292M, SMPTE 344M and
SMPTE 259M, and is optimized for performance at
270Mb/s and 1.485Gb/s.
The GS1524 features DC restoration to compensate for
the DC content of SMPTE pathological test patterns.
The GS1524 also incorporates a Cable Length Indicator
(CLI) that provides an indication of the amount of cable
being equalized for data rates up to 360Mb/s.
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS1524 output when an
approximate selected cable length is reached for
SMPTE 259M signals. This feature allows the GS1524
to distinguish between low amplitude SD-SDI signals
and noise at the input of the device. The CD/MUTE pin
provides an indication of the GS1524 mute status in
addition to functioning as a mute control input. The SD
outputs of the GS1524 may be forced to a mute state by
applying a voltage to the CD/MUTE pin.
Power consumption is typically 265mW using a 3.3V
power supply.
This component and all homogeneous subcomponents
are RoHS compliant.
MCLADJ
SDI
SDI
CABLE LENGTH INDICATOR/ADJUSTOR
CARRIER DETECT
MUTE
EQUALIZER
DC RESTORE
OUTPUT
AGC
Functional Block Diagram
14976 - 7 June 2005
CLI
CD/MUTE
BYPASS
SDO
SDO
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www.gennum.com
1 page  
GS1524 Data Sheet
Table 1-2: AC Electrical Characteristics
VDD = 3.3V, TA = 0°C to 70°C, unless otherwise shown
Parameter
Conditions
Symbol Min Typ Max Units Notes
Duty cycle distortion
–
– – – 30 ps –
Overshoot
–
–
– – 10 %
–
Input Return Loss
–
–
15 –
–
dB 1
Input Resistance
single ended
–
– 1.64 –
kΩ –
Input Capacitance
single ended
–
– 1–
pF –
Output Resistance
single ended
– – 50 – Ω –
TEST LEVELS:
1. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges.
2. Production test at room temperature and nominal supply voltage with guardbands for supply and temperature ranges using
correlated test.
3. Production test at room temperature and nominal supply voltage.
4. QA sample test.
5. Calculated result based on Level 1, 2, or 3.
6. Not tested. Guaranteed by design simulations.
7. Not tested. Based on characterization of nominal parts.
8. Not tested. Based on existing design/characterization data of similar product.
9. Indirect test.
Test
Levels
1
1
7
6
6
6
NOTES:
1. 1. Tested on CB1524 board from 5MHz to 2GHz.
GigaBERT
1400
EXT. CLOCK DATA
CLOCK OUT OUT
8281 or 1694A CABLE
50/75
IN
EXT.
CLOCK
1.485GHz/270MHz
GS1524
TEST BOARD
OUT
OUT
CH. 1
CH. 2
TDS 820
EXT. TRIGGER
Figure 1-1: Test Circuit
14976 - 7 June 2005
5 of 18
5 Page 
GS1524 Data Sheet
1100
900
700
500
400
300
200
100
0
0 100 200 300 400
CABLE LENGTH (m)
Figure 4-4: Typical Peak to Peak Jitter, PRN 223-1, Belden 1694A, 270Mb/s
3.5
3.0
2.5
2.0
0 50 100 150 200 250 300
CABLE LENGTH (m)
Figure 4-5: MCLADJ Input Voltage vs 1694A Cable Length, 270Mb/s
3.5
3
2.5
2
1.5
0 50 100 150 200 250 300
CABLE LENGTH (m)
Figure 4-6: CLI Voltage vs. Belden 8281 Cable Length, 270Mb/s
14976 - 7 June 2005
11 of 18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet GS1524.PDF ] | |
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