GS9024 GENLINX™
Automatic Cable Equalizer
GS9024 Data Sheet
Features
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automatic cable equalization
fully compatible with SMPTE 259M
typically equalizes greater than 350m of high
quality cable at 270Mb/s
signal strength indicator
output data muting when input data is lost
output 'eye' monitor (OEM) with large signal
amplitude and power down option
low power: 240mW at 5V
14 pin SOIC package
programmable output data squelch for max cable
length limiting
carrier detect with programmable threshold level
serial data output "High Z" select to allow muxing of
EQ inputs
Pb-free and Green
Description
The GS9024 is a high performance automatic cable
equalizer designed for serial digital data rates from
143Mb/s to 540Mb/s. The GS9024 receives either
single-ended or differential serial data and outputs
equalized differential signals at PECL levels (800mV).
The GS9024 provides up to 40dB of gain at 200MHz
which will typically result in equalization of greater than
350m at 270Mb/s of Belden 8281 cable.
The GS9024 incorporates an analog signal strength
indicator/carrier detect (SSI/CD) output indicating both
the presence of a carrier and the amount of equalization
applied to the signal. Optional external resistors allow
the carrier detect threshold level to be customized to the
user's requirement.
The GS9024 also features selectable High Z serial data
outputs eliminating the need for input muxing circuitry in
routers. In addition, the GS9024 provides an 'Output
Eye Monitor' (OEM) which allows the verification of
signal integrity after equalization, prior to reslicing.
The GS9024 operates from a single +5V or -5V power
supply and consumes only 240mW of power. Packaged
in a small 14 pin SOIC, the GS9024 is ideal for router
applications where high density component placement
is required.
Applications
Front-end cable equalization for digital video systems;
Input equalization for serial digital distribution
amplifiers, routers, production switchers and other
receiving equipment.
SDI
+
-
VARIABLE GAIN
EQ STAGE
+
+
-
-
SDO
SDO
HIGH Z
SDI
OEM
EYE
MONITOR
AUTO EQ
CONTROL
SSI/CD
+
AGC
-
CD_ADJ
Block diagram
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GS9024 Data Sheet
Contents
1. Electrical Characteristics ...........................................................................................3
1.1 DC Electrical Characteristics ..........................................................................3
1.2 AC Electrical Characteristics ...........................................................................4
2. Test Setup................................................................................................................5
3. Pin Connections ........................................................................................................6
4. Typical Performance Curves .....................................................................................7
5. Detailed Description ................................................................................................11
5.1 Output HIGH Z ..............................................................................................11
5.2 Signal Strength Indication/Carrier Detect ......................................................11
5.3 Carrier Detect Threshold Adjust ....................................................................12
5.4 Output Eye Monitor .......................................................................................12
5.5 I/O Description ..............................................................................................13
5.5.1 High Speed Analog Inputs (SDI/SDI)...................................................13
5.5.2 High Speed Outputs (SDO/SDO) ........................................................13
6. Applications Information..........................................................................................14
7. Typical Application Circuit .......................................................................................14
8. Package Dimensions ..............................................................................................15
9. Ordering Information ...............................................................................................15
10. Revision History ....................................................................................................16
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GS9024 Data Sheet
1. Electrical Characteristics
Table 1-1: Absolute Maximum Ratings
Parameter
Supply Voltage
Input Voltage Range (any input)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10 sec)
Value
5.5V
V
CC
+0.5 to V
EE
-0.5V
0°C
≤
T
A
≤
70°C
-65°C
≤
T
S
≤
150°C
260°C
1.1 DC Electrical Characteristics
Table 1-2: DC Electrical Characteristics
V
CC
= 5V, V
EE
= 0V, T
A
= 0°C TO 70°C unless otherwise shown.
Parameter
Supply Voltage
Power Consumption
Symbol
V
CC
P
D
–
–
Conditions
Min
4.75
–
–
–
–
–
–
–
–
–
–
–
2.4
–
NOTES
Typ
1
5.0
240
340
44
58
11
2.5
2.7
4.5
–
–
1.0
–
–
Max
5.25
–
–
–
–
–
–
–
–
18
110
1.5
–
0.8
Units
V
mW
mW
mA
mA
mA
V
V
V
µA
µA
mA
V
V
Notes
Test Level
3
3
1
1
3
1
1
1
with OEM active
Supply Current
Ι
S
–
with OEM active
Serial Data O/P Current
SDI/SDI Common
Mode Voltage
AGC+/AGC- Mode
Voltage
OEM Bias Potential
SSI/CD Output Current
Ι
SDO
–
–
–
Ι
SOURCE
R
L
= 75Ω
–
–
–
C
LM
AX
= 50pF R
L
=
∞
C
LM
AX
= 50pF R
L
= 5kΩ
I
SINK
High Z Input Voltage
V
HIGH
V
LOW
TEST LEVELS
1. 100% tested at 25°C.
2. Guaranteed by design.
3. Inferred or co-related value.
–
–
–
1
1
1. Typical values are parametric norms at 25°C.
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GS9024 Data Sheet
1.2 AC Electrical Characteristics
Table 1-3: AC Electrical Characteristics
V
CC
= 5V, V
EE
= 0V, T
A
= 0°C TO 70°C unless otherwise shown.
Parameter
Data Rate
Output Signal Swing
Additive Jitter
Symb
ol
Conditions
Min
143
Typ
1
–
850
275
200
0.65
30
10
1.0
3
Max
540
1000
–
–
–
–
–
–
–
Units
Mb/s
mV
ps p-p
ps p-p
ns
ps
kΩ
pF
µs
Notes
Test Level
1
1
V
SDO
R
L
= 75Ω
270Mb/s, 300m
540Mb/s, 100m
700
–
–
0.5
–
–
–
–
t
J
see Fig 5
see Fig 5
5
5
3
2
2
2
2
Output Rise and Fall
Times (20-80%)
Output Duty Cycle
Distortion
Input Resistance
Input Capacitance
Carrier Detect
Response Time
t
r,
t
f
–
R
IN
C
IN
–
–
SDI, SDI
SDI, SDI
Carrier Applied R
L
=
∞
,
C
L
≤
50pF on SSI/CD
Carrier Removed R
L
=
∞
,
C
L
≤
50pF on SSI/CD
–
at 270MHz
t
CDON
t
CDOFF
–
30
–
µs
2
High Z Response Time
Input Return Loss
Maximum Equalizer
Gain
TEST LEVELS
1.
2.
3.
4.
5.
t
r
HIGHZ
–
15
–
NOTES
17
20
40
–
–
–
ns
dB
dB
see Fig 8
see Fig 4
2
3
3, 5
A
EQ
at 200MHz
100% tested at 25°C.
Guaranteed by design.
Inferred or co-related value.
Evaluated using test setup
Figure 2-1.
Evaluated using test setup
Figure 2-2.
1. Typical values are parametric norms at 25°C.
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GS9024 Data Sheet
2. Test Setup
DATA
TEKTRONIX
GigaBERT
700
TRANSMITTER
DATA
GS9028
CABLE
DRIVER
BELDEN 8281
CABLE
EB9024
BOARD
TEKTRONIX
GigaBERT
700
ANALYZER
TRIGGER
CLOCK
Figure 2-1: Test Setup for
Figure 4-1.
DATA
ANRITSU
DATA
ME522A
or
GigaBERT
700
TRANSMITTER CLOCK
GS9028
CABLE
DRIVER
BELDEN 8281
CABLE
EB9024
BOARD
VERTICAL IN
SSI/CD V
V CD_ADJ OSCILLOSCOPE
TRIGGER IN
Figure 2-2: Test Setup for
Figure 4-2, Figure 4-3, Figure 4-4, Figure 4-5,
Figure 4-8,
and
Figure
.
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