GENLINX
™
GS9004D
Serial Digital Cable Equalizer
DATA SHEET
FEATURES
•
automatic cable equalization
•
typically greater than 300 m of high quality cable at
270 Mb/s
•
typically 300 m of high quality cable at 360 Mb/s
•
drop in replacement for GS9004C
•
capability to drive 50
DEVICE DESCRIPTION
The Gennum GS9004D is an improved monolithic automatic
cable equalizer developed for SMPTE/EBU scrambled
NRZI Serial Di g i t a l Video signals.
While there are no plans to discontinue the GS9004D,
Gennum has developed a successor product with improved
features and performance called the GS9024. The GS9024
is recommended for new designs.
This device features DC restoration to pass the Pathological
Test Signals and fully automatic equalization in order to
meet the SMPTE 259M Serial Interface Standard. The
DATA and DATA outputs typically deliver 800 mV (p-
p) equalized signals into 50
Ω
loads (to V
TT
). These
signals can be used to feed cable driver circuits for Serial
Distribution Amplifier applications.
•
fully compatible with SMPTE 259M and operational to
400 Mb/s
•
signal strength indicator
•
output 'eye' monitor
•
14 pin SOIC packaging
•
single +5 or -5 volt power supply operation
•
Pb-free and Green
APPLICATIONS
• Front-end cable equalization for digital video systems
• Input equalization for serial digital distribution amplifiers,
routers, production switchers and other receiving
equipment
ORDERING INFORMATION
Part Number
GS9004DCKB
GS9004DCTB
GS9004DCKBE3
D
E
D S
N N
E G
M SI
M E
O D
C
E W
R E
T N
O R
N O
F
W
loads (to V
TT
)
Package Type
Temperature Range
0
o
C to 70
o
C
0 C to 70 C
0 C to 70 C
o
o
o
o
This device also incorporates an analog signal strength
indicator (SSI) which provides a 0.5 V to 0 V output relative
to V
CC
, indicating the amount of equalization being applied
to the signal.
The GS9004D features an OUTPUT 'EYE' MONITOR
(OEM), which allows verification of signal integrity after
equalization, prior to reslicing. Operating with a single
+5 or -5 volt supply, the GS9004D typically draws 52 mA
of current.
Pb-Free and Green
No
No
14 pin SOIC
14 pin SOIC Tape
14 pin SOIC
Yes
GS9004D
6
SIGNAL
STRENGTH
INDICATOR
FILTER
CONTROL
AGC
CAPACITOR
7
PEAK
DETECTOR
VOLTAGE
VARIABLE
FILTER
LOGIC
COMPARATOR
IN+
8
9
14
13
IN-
Σ
DC
RESTORER
DATA
DATA
3 OUTPUT 'EYE'
MONITOR
Revision Date: July 2004
FUNCTIONAL BLOCK DIAGRAM
Document No. 32486 - 0
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996 fax. +1 (905) 632-5946
Web Site: www.gennum.com E-mail: info@gennum.com
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage (V
S
)
Input Voltage Range (any input)
DC Input Current (any one input)
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10 sec)
VALUE
5.5 V
V
CC
+0.5 to V
EE
-0.5 V
10 mA
500 mW
0
°
C
≤
T
A
≤
70
°
C
-65
°
C
≤
T
S
≤
150
°
C
260
°
C
V
CC
(GND)
V
CC
(GND)
OEM
V
CC
(GND)
NC
SSI
1
2
3
4
5
6
7
14
13
12
11
10
9
8
GS9004D
PIN CONNECTIONS
DATA
DATA
GND 1 (V
EE
1
)
GND (V
EE
)
GND (V
EE
)
IN –
IN+
PIN DESCRIPTIONS
(I = INPUT, O = OUTPUT, S = SUPPLY function)
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYMBOL
I/O
S
DESCRIPTION
AGC
GS9004D DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Supply Voltage
Power Consumption
Supply Current
Serial Data Output - High
- Low
GS9004D AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
D
E
D S
N N
E G
M SI
M E
O D
C
E W
R E
T N
O R
N O
F
V
CC
(GND)
V
CC
(GND)
Most positive supply voltage (ECL outputs)
S
Most positive supply voltage (DC Restore/Eye Monitor)
OEM
O
S
Output 'Eye' Monitor
V
CC
(GND)
NC
SSI
Most positive supply voltage (Equalizer)
No Connection
O
I
Signal Strength Indicator
AGC
IN+
IN-
AGC capacitor connection
I
Non-inverting signal
Inverting signal
I
GND(V
EE
)
GND(V
EE
)
S
S
S
Most negative supply voltage
Most negative supply voltage
GND1(V
EE1
)
DATA
Most negative supply voltage
for EYE MONITOR
O
DATA (true)
DATA
O
DATA (inverse)
Conditions: V
S
= 5 V, T
A
= 0
o
to 70
o
C, R
L
= 100
Ω,
to (V
CC
-2) volts, unless otherwise shown.
CONDITIONS
MIN
TYP
MAX
UNITS
V
NOTES
V
S
Operating Range
4.75
-
-
-
5.0
5.25
360
72
415
83
P
D
I
S
285
52
-
mW
mA
V
With MONITOR active
With MONITOR active
T
A
= 25°C
T
A
= 25°C
330
60
-
mW
mA
V
-
V
OH
MIN
-1.025
-1.8
-0.88
-1.6
with respect to V
CC
with respect to V
CC
V
OL MAX
Conditions: V
S
= 5 V, T
A
= 0
o
to 70
o
C, R
L
= 100
Ω,
to (V
CC
-2) volts, unless otherwise shown
CONDITIONS
MIN
TYP
MAX
UNITS
mV
Ω
pF
NOTES
Output Signal Swing
Input Resistance
(IN+, IN-)
Input Capacitance
(IN+, IN-)
Output 'Eye' Monitor
Signal Strength Output
GS9004C GAIN
V
O
R
IN
C
IN
V
OEM
V
SS
A
V
t
J
T
A
= 25°C
T
A
= 25°C
R
L
= 50Ω, To V
CC
T
A
= 25°C
ƒ=135 MHz
T
A
= 25°C, 300m of 8281
cable.
700
4k
-
-
4.4
30
800
5k
1.3
40
-
33
900
-
-
-
5
-
see fig. 5
see fig. 5
mV p-p
V
dB
JITTER (Added)
270Mb/s
-
600
-
ps p-p
Test setup 1
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GS9004D CABLE EQUALIZER - DETAILED DEVICE DESCRIPTION
The GS9004D Cable Equalizer is a bipolar integrated circuit
used to equalize SMPTE 259M signals from a co-axial cable.
The device is implemented as a fourteen pin SOIC, powered
from a single five volt supply. With an operating frequency up
to 400 Mb/s, the equalizer consumes about 285 mW of
power.
The Serial Digital signal is connected to the input (pins 8, 9)
either differentially or single ended with the unused input
being decoupled. The equalized signal is generated by
passing the cable signal through a voltage variable filter
having a characteristic which closely matches the inverse
cable loss characteristic. Additionally, the variation of the
filter characteristic with control voltage is designed to imitate
the variation of the inverse cable loss characteristic as the
cable length is varied.
The amplitude of the equalized signal is monitored by a peak
detector circuit which produces an output current with a
polarity corresponding to the difference between the desired peak
signal level and the actual peak signal level.
This output is integrated by an external AGC filter capacitor
(AGC CAP pin 7), providing a steady control voltage for the
voltage variable filter.
A separate signal strength indicator output, (SSI pin 6),
proportional to the amount of AGC, is also provided. As the
filter characteristic is varied automatically by the application
of negative feedback, the amplitude of the equalized signal is
kept at a constant level which is representative of the original
amplitude at the transmitter.
The equalized signal is then DC restored, effectively restoring
the logic threshold of the equalized signal to its correct level
irrespective of shifts due to AC coupling.
As the final stage of signal conditioning, a comparator converts
the analog output of the DC restorer to a regenerated digital
output signal having pseudo-ECL voltage levels. These
outputs, DATA and DATA, are available from pins 13 and 14
respectively.
An OUTPUT 'EYE' MONITOR (pin 3) allows verification of
signal integrity after equalization, prior to reslicing.
68
V
CC
V
CC
50
OEM
D
E
D S
N N
E G
M SI
M E
O D
C
E W
R E
T N
O R
N O
F
+5V
10µ
+
1.0
1.8p
150
GND
68
1.0
1.8p
100
5
6
7
8
GND
SI
SI
SO2 4
SO2 3
150
68
SO1 2
SO1 1
100
100n
SDO4
SDO3
VCC
100n
SDO2
100n
1
2
3
4
5
6
7
V
CC
V
CC
V
CC
DATA
DATA
14
13
12
11
10
9
8
680
V
CC
GS9007
1.0
1.8p
150
68
V
CC
100n
V
CC
OEM
V
CC
N/C
SSI
GND1
GND
GND
IN -
680
OEM
SDO1
100n
1.0
1.8p
100n
150
100n
113
+
V
CC
AGC
IN+
10
47p
47p
All resistors in ohms, all capacitors in microfarads,
SSI
GS9004D
75
all inductors in henries unless otherwise stated.
75
18n
SDI
Fig. 1 Test Circuit
8281 CABLE
CABLE
DRIVER
DATA
CABLE
DRIVER
ANRITSU
ME522A
OR
TEKTRONIX
TSG422
D.U.T.
VERTICAL
IN
CLOCK
OSCILLOSCOPE
TRIGGER
IN
Fig. 2 Test Set-up 1
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32486 -0
TYPICAL PERFORMANCE CURVES
(unless otherwise shown V
S
= 5V, T
A
= 25°C)
80
0
900
SERIAL OUTPUT (mV)
850
75
5
V
S
= 5.25 V
V
S
= 5.25 V
800
CURRENT (mA)
70
0
V
S
= 5.0 V
750
V
S
= 5.0 V
V
S
= 4.75 V
700
65
5
60
0
0
V
CC
V
CC
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
D
E
D S
N N
E G
M SI
M E
O D
C
E W
R E
T N
O R
N O
F
V
S
= 4.75 V
650
10
20
30
40
50
60
70
600
0
10
20
30
40
50
60
70
TEMPERATURE
TEMPERATURE (°C)
Fig. 3 Supply Current vs Temperature
Fig. 4 Data and Data Output Voltage vs Temperature
R2
68
+5V
V
CC
10µ
+
GND
R3
150
C6
1.0
C8
1.8p
J3
SDO4
R5
68
100n
GS9004D
C3
100n
1
2
3
4
5
6
7
V
CC
V
CC
V
CC
DATA
DATA
14
13
12
11
10
9
8
R7
100
5
6
7
8
GND
SI
SI
SO2 4
SO2 3
R6
150
C10
1.0
C11
1.8p
J4
SDO4
SO1 2
SO1 1
R8
68
C4 100n
OEM
V
CC
N/C
SSI
GND1
GND
GND
IN -
JP1 OEM
R1
50
R10
100
VCC
V
CC
J2
OEM
C2
100n
C7
100n
R11
680
R12
680
V
CC
GS9007
R13
150
C13
1.0
C16
1.8p
J5
SDO4
113
R14
68
V
CC
+
AGC
IN+
TP1
SSI
C5
10µ
C12
47p
C15
47p
C14
100n
R15
150
R15
1.0
C18
1.8p
J6
SDO4
75
J1
SDI
R9
75
L1
18n
Fig. 5 Typical Application Circuit
All resistors in ohms, all capacitors
in microfarads unless otherwise stated.
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DOCUMENT IDENTIFICATION:
DATA SHEET
The product is in production. Gennum reserves the right to
make changes at any time to improve reliability, function or
design, in order to provide the best product possible.
GENNUM CORPORATION
MAILING ADDRESS:
P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814
SHIPPING ADDRESS:
970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5
REVISION NOTES:
New document.
For latest product information, visit www.gennum.com
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 27F 6-14-1, Nishi Shinjuku Shinjuku-ku,
Tokyo 160-0023 Japan
GENNUM UK LIMITED
25 Long Garden Walk Farnham, Surrey, England GU9 7HX
Tel: +44 (0) 1252 747000 Fax: +44 (0) 1252 726523
Tel: +81 (03) 3349-5501
Fax: +81 (03) 3349-5505
Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement.
© Copyright July 2004 Gennum Corporation.
All rights reserved.
Printed in Canada.
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