GENNUM GS9004C

GENLINX™ GS9004C
Serial Digital Cable Equalizer
DATA SHEET
FEATURES
DEVICE DESCRIPTION
• automatic cable equalization
The Gennum GS9004C is an improved monolithic automatic
cable equalizer developed for SMPTE/EBU scrambled
NRZI Serial Di g i t a l Video signals.
• typically greater than 350 m of high quality cable at
270 Mb/s
While there are no plans to discontinue the GS9004C,
Gennum has developed a successor product with improved
features and performance called the GS9024. The GS9024
is recommended for new designs.
• typically 300 m of high quality cable at 360 Mb/s
• improved jitter response vs cable length
• drop in replacement for GS9004B
• capability to drive 50 Ω loads (to VTT)
• fully compatible with SMPTE 259M and operational to
400 Mb/s
• signal strength indicator
• output 'eye' monitor
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.
• 14 pin SOIC packaging
This device also incorporates an analog signal strength
indicator (SSI) which provides a 0.5 V to 0 V output relative
to VCC, indicating the amount of equalization being applied
to the signal.
• single +5 or -5 volt power supply operation
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
Package Type
GS9004CCKB
GS9004CCTB
14 pin SOIC
14 pin SOIC Tape
The GS9004C 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 GS9004C typically draws 52 mA of
current.
Temperature Range
0oC to 70oC
0oC to 70oC
GS9004C
6
SIGNAL
STRENGTH
INDICATOR
FILTER
CONTROL
AGC
7 CAPACITOR
PEAK
DETECTOR
VOLTAGE
VARIABLE
FILTER
LOGIC
COMPARATOR
IN+
IN-
8
9
Σ
DC
RESTORER
14
13
DATA
DATA
3 OUTPUT 'EYE'
MONITOR
FUNCTIONAL BLOCK DIAGRAM
Document No. 521 - 72 - 00
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: [email protected]
ABSOLUTE MAXIMUM RATINGS
PARAMETER
GS9004C
PIN CONNECTIONS
VALUE
Supply Voltage (VS)
5.5 V
Input Voltage Range (any input)
VCC+0.5 to VEE -0.5 V
VCC (GND)
1
14
DATA
10 mA
VCC (GND)
2
13
DATA
DC Input Current (any one input)
Power Dissipation
Operating Temperature Range
500 mW
OEM
3
12
0°C ≤ TA ≤ 70°C
GND 1 (VEE1)
VCC (GND)
4
11
GND (VEE)
NC
5
10
GND (VEE)
SSI
6
9
IN –
7
8
IN+
-65°C ≤ T S ≤ 150°C
Storage Temperature Range
260°C
Lead Temperature (soldering, 10 sec)
AGC
PIN DESCRIPTIONS (I = INPUT, O = OUTPUT, S = SUPPLY function)
PIN NO.
SYMBOL
I/O
DESCRIPTION
1
VCC (GND)
S
Most positive supply voltage (ECL outputs)
2
VCC(GND)
S
Most positive supply voltage (DC Restore/Eye Monitor)
3
OEM
O
Output 'Eye' Monitor
4
VCC(GND)
S
Most positive supply voltage (Equalizer)
5
NC
6
SSI
7
AGC
I
AGC capacitor connection
8
IN+
I
Non-inverting signal
9
IN-
I
Inverting signal
No Connection
O
Signal Strength Indicator
10
GND(V EE)
S
Most negative supply voltage
11
GND(V EE)
S
Most negative supply voltage
12
GND1(VEE1 )
S
Most negative supply voltage
for EYE MONITOR
13
DATA
O
DATA (true)
14
DATA
O
DATA (inverse)
GS9004C DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Supply Voltage
VS
Power Consumption
PD
Conditions: V S = 5 V, TA = 0o to 70o C, RL = 100 Ω, to (V CC -2) volts, unless otherwise shown
CONDITIONS
Operating Range
With MONITOR active
IS
Supply Current
With MONITOR active
Serial Data Output - High
- Low
VOH
TYP
MAX
UNITS
4.75
5.0
5.25
V
-
285
360
mW
-
330
415
mW
-
52
72
mA
-
60
83
mA
MIN
TA = 25˚C
-1.025
-
-0.88
V
with respect to V CC
TA = 25˚C
-1.8
-
-1.6
V
with respect to VCC
SYMBOL
Conditions: VS = 5 V, TA = 0o to 70 oC, RL = 100 Ω, to (VCC -2) volts, unless otherwise shown
CONDITIONS
Output Signal Swing
VO
Input Resistance(IN+, IN-)
RIN
Input Capacitance(IN+, IN-)
CIN
TA = 25˚C
Output 'Eye' Monitor
VOEM
RL = 50Ω, To VCC
Signal Strength Output
VSS
GS9004C GAIN
AV
JITTER (Added)
270Mb/s
tJ
TA = 25˚C
TA = 25˚C
MIN
TYP
MAX
UNITS
700
800
900
4k
5k
-
NOTES
Ω
see fig. 8
-
1.3
-
pF
see fig. 8
mV p-p
mV
-
40
-
4.4
-
5
V
30
33
-
dB
-
600
-
ps p-p
ƒ=135 MHz
521 - 72 - 00
NOTES
VOL MAX
GS9004C AC ELECTRICAL CHARACTERISTICS
PARAMETER
MIN
see Fig. 5
see Fig. 4
TA = 25˚C, 300m of 8281
cable.
2
Test setup 1
see Fig. 7
GS9004C CABLE EQUALIZER - DETAILED DEVICE DESCRIPTION
This output is integrated by an external AGC filter capacitor
(AGC CAP pin 7), providing a steady control voltage for the
voltage variable filter.
The GS9004C 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.
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 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 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.
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.
An OUTPUT 'EYE' MONITOR (pin 3) allows verification of
signal integrity after equalization, prior to reslicing.
68
VCC
+5V
SDO4
+
10µ
1.0
1.8p
150
GND
68
SDO3
1.0
100
5
6
7
100
100n
100n
100n
1
VCC
VCC
50
VCC
2
100n
3
VCC
4
100n
5
100n
100n
OEM
+
VCC
SSI
6
7
VCC
DATA
VCC
DATA
OEM
GND1
VCC
GND
N/C
GND
SSI
IN -
AGC
IN+
10
680
14
8
GND
SO2 4
SI
SO2 3
SI
SO1 2
VCC
SO1 1
VCC
GS9007
1.8p
150
68
SDO2
1.0
1.8p
150
13
68
680
12
OEM
SDO1
11
1.0
10
1.8p
150
113
9
8
47p
GS9004C
47p
All resistors in ohms, all capacitors in microfarads,
75
18n
75
all inductors in henries unless otherwise stated.
SDI
Fig. 1 Test Circuit
8281 CABLE
ANRITSU
ME522A
OR
TEKTRONIX
TSG422
CABLE
DRIVER
DATA
D.U.T.
CABLE
DRIVER
VERTICAL
IN
CLOCK
OSCILLOSCOPE
TRIGGER
IN
Fig. 2 Test Set-up 1
3
521 - 72 - 00
TYPICAL PERFORMANCE CURVES (unless otherwise shown VS = 5V, TA = 25°C)
80 0
40
35
30
VS = 5.25 V
70 0
GAIN (dB)
CURRENT (mA)
75 5
V S = 5.0 V
65 5
25
20
15
10
V S = 4.75 V
5
60 0
0
10
20
30
40
50
60
0
70
0.1
1
10
TEMPERATURE
Fig. 4 Equalizer Gain vs Frequency
900
4.9
850
SERIAL OUTPUT (mV)
5.0
SSI VOLTAGE (V)
4.8
4.7
4.6
0
50
100
150
200
250
300
VS = 5.0 V
750
VS = 4.75 V
700
0
900
800
270 Mb/s 223 PRN
Signal Source
600
500
400
300
200
100
0
50
100
150
200
250
20
30
40
50
60
70
Fig. 6 Data and Data Output Voltage vs Temperature
1000
700
10
TEMPERATURE (°C)
Fig. 5 Signal Strength Output Voltage
vs Input Cable Length
JITTER p-p (ps)
800
600
350
CABLE LENGTH (m) (8281)
300
350
INPUT CABLE LENGTH (m) (8281)
Fig. 7 Additive Jitter vs Input Cable Length
at 270 Mb/s
521 - 72 - 00
VS = 5.25 V
650
4.5
0
500
FREQUENCY (MHz)
Fig. 3 Supply Current vs Temperature
4.4
100
4
R2
68
VCC
+5V
J3
SDO4
+
10µ
C6
1.0
R3
150
GND
C8
1.8p
R5
68
J4
SDO4
100n
GS9004C
C3
100n
VCC
VCC
1
VCC
2
C4 100n
R1
50
3
4
VCC
5
J2
OEM
C2
100n
VCC
TP1
SSI
C7
100n
+
6
7
VCC
VCC
OEM
VCC
N/C
SSI
AGC
C5
10µ
5
R7
100
14
DATA
13
DATA
12
GND1
11
GND
10
GND
9
IN 8
IN+
6
7
8
R10
100
JP1 OEM
R11
680
R12
680
GND
SO2 4
SI
SO2 3
SI
SO1 2
VCC
SO1 1
VCC
GS9007
R6
150
R13
150
C10
1.0
R8
68
C13
1.0
113
C16
1.8p
J5
SDO4
R14
68
C14
100n
C15
47p
C12
47p
C11
1.8p
R15
150
R15
1.0
C18
1.8p
J6
SDO4
75
J1
SDI
R9
75
L1
18n
All resistors in ohms, all capacitors
in microfarads unless otherwise stated.
Fig. 8 Typical Application Circuit
CAUTION
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
DOCUMENT IDENTIFICATION: DATA SHEET
REVISION NOTES:
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.
New information added to Device Description
GENNUM CORPORATION
GENNUM JAPAN CORPORATION
C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan
MAILING ADDRESS:
P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814
Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839
GENNUM UK LIMITED
Centaur House, Ancells Business Park, Ancells Road, Fleet, Hampshire, UK GU13 8UJ
Tel. +44 (1252) 761 039 Fax +44 (1252) 761 114
SHIPPING ADDRESS:
970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5
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 April 1996 Gennum Corporation.
All rights reserved.
5
Printed in Canada.
521 - 72 - 00