Gennum GS9064-CKDE3 Gs9064 sd sdi adaptive cable equalizer Datasheet

GS9064 SD SDI
Adaptive Cable Equalizer
DATA SHEET
DESCRIPTION
• SMPTE 259 and SMPTE 344 compliant
The GS9064 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 540Mb/s. The GS9064 is designed to
support SMPTE 344M and SMPTE 259M and is optimized
for performance at 270Mb/s.
• automatic cable equalization
• supports DVB-ASI at 270Mb/s
• typical maximum equalized length of Belden 1694A
cable at 270Mb/s is 350m
• 50Ω differential output (with internal 50Ω pull-ups)
• cable length indicator
• output mute based on maximum cable length adjust or
manual override
• Pb-free and Green
• single 3.3V power supply operation
• operating temperature range: 0°C to +70°C
• pin compatible with HDLINX™ II GS1524 multirate SDI
adaptive cable equalizer
APPLICATIONS
•
SMPTE 259M Coaxial Cable Serial Digital Interfaces
The GS9064 features DC restoration to compensate for the
DC content of SMPTE pathological test patterns, and
incorporates a Cable Length Indicator (CLI) that provides a
linear indication of the amount of cable being equalized.
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS9064 output when a
selected cable length is reached. This feature allows the
GS9064 to distinguish between low amplitude SDI signals
and noise at the input of the device. The CD/MUTE pin
provides an indication of the GS9064 mute status in
addition to functioning as a mute control input. The output
of the GS9064 may be forced to an active or a mute
condition by applying a voltage to the CD/MUTE pin.
CABLE LENGTH INDICATOR/ADJUSTOR
CARRIER DETECT
MUTE
MCLADJ
CLI
CD/MUTE
BYPASS
SDI
SDI
EQUALIZER
DC RESTORE
OUTPUT
SDO
SDO
AGC
GS9064 FUNCTIONAL BLOCK DIAGRAM
Revision Date: June 2004
Document No. 22212 - 2
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: [email protected]
www.gennum.com
GS9064
KEY FEATURES
TABLE OF CONTENTS
1. PIN OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 PIN ASSIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.2 PIN DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
2. ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
GS9064
2.1 ABSOLUTE MAXIMUM RATINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2 DC ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.3 AC ELECTRICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.4 INPUT/OUTPUT CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
2.5 TYPICAL PERFORMANCE CURVES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
3. DETAILED DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4. APPLICATION REFERENCE DESIGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.1 PCB LAYOUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2 TYPICAL APPLICATION CIRCUIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5. REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
6. PACKAGE & ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.1 PACKAGE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.2 ORDERING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
7. REVISION HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
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1.
PIN OUT
1.1
CLI
1
16
CD/MUTE
VCC
2
15
VCC
VEE
3
14
VEE
SDI
4
13
SDO
SDI
5
12
SDO
VEE
6
11
V
AGC+
7
10
MCLADJ
AGC-
8
9
BYPASS
GS9064
16PIN SOIC
TOP VIEW
GS9064
1.2
PIN ASSIGNMENT
EE
PIN DESCRIPTIONS
PIN
NUMBER
NAME
TYPE
1
CLI
Output
DESCRIPTION
CABLE LENGTH INDICATOR
An analog voltage proportional to the cable length connected to the serial digital input.
NOTE: CLI is recommended for data rates up to 360 Mb/s only.
2, 15
VCC
Input
Power
Most positive power supply connection. Connect to +3.3V.
3, 6, 11,
14
VEE
Input
Power
Most negative power supply connection. Connect to ground.
4, 5
SDI, SDI
Input
Serial digital differential inputs.
7, 8
AGC+, AGC-
Passive
Input
9
BYPASS
Input
10
MCLADJ
Input
External AGC capacitor. Should be set to 1µF.
Forces the CORE stage and the DC RESTORE stage 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 recommended for data rates up to 360 Mb/s only.
12, 13
SDO, SDO
Output
Equalized serial digital differential outputs.
16
CD/MUTE
Input /
Output
MUTE INDICATOR-CONTROL / CARRIER DETECT
OUTPUT: the output voltage drops to below 1.2V when the carrier is present and the
data outputs are active.
INPUT: if the CD/MUTE pin is tied to ground, the data output will never mute and the
MCLADJ setting is overwritten. If the CD/MUTE pin is tied to VCC, the data outputs will
always mute and the MCLADJ setting is overwritten.
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2.
2.1
ELECTRICAL CHARACTERISTICS
ABSOLUTE MAXIMUM RATINGS
PARAMETER
VALUE
Supply Voltage
-0.5V to +3.6 VDC
500V
Storage Temperature Range
-50°C< Ts < 125°C
Input Voltage Range (any input)
-0.3 to (VCC + 0.3)V
Operating Temperature Range
0°C to 70°C
Power Dissipation
300mW
Lead Temperature (soldering, 10 sec.)
2.2
GS9064
Input ESD Voltage
260°C
DC ELECTRICAL CHARACTERISTICS
VCC = 3.3V , VEE = 0V , TA = 0°C to 70°C, 270Mb/s, unless otherwise shown
PARAMETER
SYMBOL
CONDITIONS
MIN
TYPICAL
MAX
UNITS
TEST
LEVEL
NOTES
Supply Voltage
VCC
3.1
3.3
3.5
V
1
-
Power Consumption
PD
TA = 25°C
-
265
-
mW
5
-
Supply Current
ΙS
TA = 25°C
-
80
-
mA
1
-
Input Common Mode Voltage
Output Common Mode Voltage
VCMIN
-
1.75
-
V
10
-
VCMOUT
-
VCC - ∆VSDO/2
-
mV
7
-
Cable length = 0m
-
2.5
-
V
1
-
No signal (max
cable length)
-
1.9
-
V
7
-
-
1.3
-
V
7
-
0m to max cable
length
-
0.69
-
V
7
-
2.6
-
-
V
1
-
-
-
1.2
1
-
3.0
-
-
V
7
-
-
-
2.0
V
7
-
CLI DC Voltage
Floating MCLADJ DC Voltage
MCLADJ Range
CD/Mute Output Voltage
VCD/Mute(OH)
Carrier not present
VCD/Mute(OL)
Carrier present
CD/Mute Input Voltage
Required to Force Outputs to
Mute
VCD/Mute)
Min to Mute
CD/Mute Input Voltage
Required to Force Outputs to
Activate
VCD/Mute
Max to Activate
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.
10. Wafer Probe
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2.3
AC ELECTRICAL CHARACTERISTICS
VCC = 3.3V , VEE = 0V , TA = 0°C to 70°C, 270Mb/s, unless otherwise shown
PARAMETER
SYMBOL
CONDITIONS
MIN
TYPICAL
MAX
UNITS
TEST
LEVEL
NOTES
DRSDI
EQ active
143
-
540
Mb/s
6
-
Input Swing
∆VSDI
Differential, TA =25°C
720
800
950
mVp-p
1
-
Differential, 50 ohm load, TA
=25°C
-
750
-
mVp-p
1
-
270Mb/s, Belden 8281
-
280
-
m
7
-
-
180
-
m
7
-
Cable length = 0m
Output Swing
∆VSDO
Maximum Equalized
Cable Length
0.20UI output jitter
EQ Pathological
540Mb/s, Belden 8281
0.20UI output jitter
EQ Pathological
Output Rise/Fall Time
tr, tf
-
80
220
ps
1
-
Mismatch in Rise/Fall
Time
-
-
30
ps
1
-
Duty Cycle Distortion
-
-
100
ps
7
-
Overshoot
-
-
10
%
1
-
15
-
-
dB
7
-
Input Return Loss
20% - 80%
IRL
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.
10. Wafer Probe
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GS9064
Serial Input Data Rate
2.4
INPUT/OUTPUT CIRCUITS
All resistors in ohms, all capacitors in farads, unless otherwise shown.
3k
50
50
SDI
SDI
RC
SDO
3.6k
3.6k
SDO
Figure 1 Input Equivalent Circuit
Figure 4 Output Circuit
VCC
VCC
10k
12k
+
MCLADJ
10k
-
150µ
CLI
+
Figure 5 CLI Output Circuit
Figure 2 MCLADJ Equivalent Circuit
VCC
7.5k
OUTPUT
STAGE
CD/MUTE
MUTE
CONTROL
Internal
Reference
Bypass
Figure 3 CD/MUTE Circuit
Figure 6 Bypass Circuit
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GS9064
3k
2.5
TYPICAL PERFORMANCE CURVES
All resistors in ohms, all capacitors in farads, unless otherwise shown.
3.5
MCLADJ VOLTAGE (V)
300
250
200
150
100
GS9064
POWER CONSUMPTION (mW)
350
3.0
2.5
50
0
0
20
40
60
2.0
80
0
50
100
TEMPERATURE (˚C)
150
200
250
300
CABLE LENGTH (m)
Figure 7 Power Consumption
Figure 10 MCLADJ Input Voltage vs 1694A Cable Length,
270Mb/s
3.5
900
3
700
JITTER (ps)
CLI VOLTAGE (V)
1100
2.5
2
500
400
300
200
100
1.5
0
50
100
150
200
250
300
0
0
CABLE LENGTH (m)
100
200
300
400
CABLE LENGTH (m)
Figure 8 CLI Voltage vs 8281 Cable Length, 270Mb/s
Figure 11 Typical Peak-to-Peak Jitter, PRN223-1, 1694A, 270Mb/s
Figure 9 Input 8281, 280m, 270Mb/s
Figure 12 Output 8281, 280m, 270Mb/s
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3.
DETAILED DESCRIPTION
The GS9064 is a high speed bipolar IC designed to
equalize SD serial digital signals. The device can typically
equalize 350 meters of Belden 1694A cable at 270Mb/s.
Powered from a single +3.3V or -3.3V power supply, the
device consumes approximately 240mW of power.
SERIAL DIGITAL INPUT
The SD serial digital input signal may be connected to the
input pins (SDI/SDI) in either a differential or single ended
configuration. AC coupling of the inputs is recommended,
as the SDI and SDI inputs are internally biased at
approximately +1.8 volts.
3.2
The GS9064 incorporates an analog cable length indicator
(CLI) output and a programmable threshold output mute
(MCLADJ). In addition, a multi-function CD/MUTE pin allows
control of the GS9064 MUTE functionality for SD inputs.
AUTOMATIC CABLE EQUALIZATION
The input signal passes through a variable gain equalizing
stage whose frequency response closely matches the
inverse of the cable loss characteristic. In addition, the variation of the frequency response with control voltage imitates
the variation of the inverse cable loss characteristic with
cable length.
The edge energy of the equalized signal is monitored by a
detector circuit which produces an error signal
corresponding to the difference between the desired edge
energy and the actual edge energy. This error signal is
integrated by both an internal and an external AGC filter
capacitor providing a steady control voltage for the gain
stage. As the frequency response of the gain stage is
automatically varied by the application of negative
feedback, the edge energy of the equalized signal is kept
at a constant level which is representative of the original
edge energy at the transmitter.
The equalized signal is also DC restored, effectively restoring the logic threshold of the equalized signal to its correct
level independent of shifts due to AC coupling. The digital
output signals have a nominal voltage of 750mVpp differential, or 375mVpp single ended when terminated with 50Ω as
shown below in Figure 13.
3.3.1 Cable Length Indicator
The voltage output of the CLI pin is a representation of the
amount of cable present at the inputs of the device. Figure
8 shows the CLI voltage versus cable length (signal
strength). At 270Mb/s with no cable length and 800mV input
signal levels, the CLI output voltage is approximately 2.5V.
As the cable length is increased, the CLI voltage
decreases, thereby providing an approximate correlation
between the CLI voltage and cable length
3.3.2 Programmable Mute Threshold
A voltage programmable mute threshold (MCLADJ) is
included to allow muting of the GS9064 output when a
selected cable length is reached. This feature allows the
device to distinguish between low amplitude SDI signals
and noise at its input.
Figure 10 shows the relationship between the voltage
applied to the MCLADJ pin and the input cable length
accepted by the GS9064. For consistent accurate results
this may need to be calibrated for each device. The
MCLADJ pin may be left unconnected for applications
where output muting is not required.
This feature has been designed for use in applications such
as routers where signal crosstalk and circuit noise cause
the equalizer to output erroneous data when no input signal
is actually present. The use of a Carrier Detect function with
a fixed internal reference does not solve this problem since
the signal to noise ratio on the circuit board could be
significantly less than the default signal detection level set
by the on-chip reference.
NOTE: MCLADJ and CLI are only recommended for data
rates up to 360 Mb/s.
+187.5mV
3.3.3 Carrier Detect/Mute
VCM = 2.925V
typical
SDO
-187.5mV
SDO
+187.5mV
50
50
VCM = 2.925V
typical
-187.5mV
Applying a HIGH INPUT to the CD/Mute pin forces the
GS9064 outputs to a muted condition. See the DC Electrical
Characteristics table for voltage levels. In this condition the
outputs are latched to the last logic level present at the
output to avoid signal crosstalk.
Applying a LOW INPUT to the CD/Mute pin will force the
GS9064 outputs to remain active regardless of input cable
length or the voltage applied to the MCLADJ pin. See the DC
Electrical Characteristics table for voltage levels.
Figure 13 Typical Output Voltage Levels
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GS9064
3.1
3.3 CABLE LENGTH INDICATION & CARRIER
DETECT/MUTE
When used as an OUTPUT, the CD/Mute pin will provide an
indication of the output mute status. The CD/Mute voltage
will fall to below 1.2V when the carrier is present and the
data outputs are active.
NOTE: The CD/Mute pin is not functional in BYPASS mode.
4.
APPLICATION REFERENCE DESIGN
GS9064
4.1
PCB LAYOUT
An FR-4 dielectric can be used, however, controlled
impedance transmission lines are required for PCB traces
longer than approximately 1cm. Note the following PCB
artwork features used to optimize performance:
1. The PCB ground plane is removed under the GS9064
input AND output components to minimize parasitic
capacitance.
2. High speed traces are curved to minimize impedance
changes.
4.2
TYPICAL APPLICATION CIRCUIT
CLI
CD/MUTE
VCC
VCC
10n
BNC
GS9064
6.4n
1
2
3
1u
4
5
6
7
75
1u
8
75
+
37.4
CLI
VCC
VEE
SDI
SDI
VEE
AGC+
AGC-
10n
CD/MUTE
VCC
VEE
SDO
SDO
VEE
MCLADJ
BYPASS
16
15
14
13
12
11
10
9
+
4u7
SDO
+
SDO
4u7
1u
MCLADJ
NOTE: All resistors in Ohms, capacitors in Farads,
and inductors in Henrys, unless otherwise noted.
5.
BYPASS
REFERENCES
Compliant with SMPTE 259M and SMPTE 344.
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6.
6.1
PACKAGE & ORDERING INFORMATION
PACKAGE DIMENSIONS
* CONTROLLING DIMENSION: MM
16
MILLIMETER
9
H
MIN.
NOM.
MAX.
MIN.
NOM.
MAX.
A
1.35
1.63
1.75
0.053
0.064
0.069
A1
0.10
0.15
0.25
0.004
0.006
0.010
A2
1.30
1.40
1.50
0.051
0.055
0.059
b
0.33
0.41
0.51
0.013
0.016
0.020
0.25
0.007
0.010"
8
GAUGE PLANE
L
b
c
0.19
9.80
9.91
10.01
0.386
0.390
0.394
E
3.80
3.90
4.00
0.150
0.154
0.157
e
Detail F
1.27
5.80
6.00
6.20
0.228
0.236
0.244
L
0.40
0.64
1.27
0.016
0.025
0.050
0.10
0˚
8˚
0.004
0˚
8˚
c
A1
A
A2
0.042
1.07
Y
e
0.50
H
L1
D
0.010
D
L1
Y
Seating Plane
See Detail F
16 PIN SOIC
6.2
7.
ORDERING INFORMATION
PART NUMBER
PACKAGE
TEMPERATURE RANGE
Pb-FREE AND GREEN
GS9064-CKD
16 pin SOIC
0°C to 70°C
No
GS9064-CKDE3
16 pin SOIC
0°C to 70°C
Yes
REVISION HISTORY
VERSION
ECR
DATE
CHANGES AND/OR MODIFICATIONS
A
120607
July 2002
New Document
B
125774
July 2002
Added detailed block descriptions and initial applications information.
C
126688
September 2002
Change packaging from LGA to SOIC for pin compatibility with the
GS1524.
0
127023
December 2002
Upgrade document to Preliminary Data Sheet and edit AC/DC
Characteristics to match current design specification limits.
1
128542
June 2003
Upgrade document to Data Sheet. Power number corrected.
2
133975
June 2004
Added lead-free and green information.
DOCUMENT IDENTIFICATION
CAUTION
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) 632-5946
SHIPPING ADDRESS:
970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5
ELECTROSTATIC
SENSITIVE DEVICES
DO NOT OPEN PACKAGES OR HANDLE
EXCEPT AT A STATIC-FREE WORKSTATION
GENNUM JAPAN CORPORATION
Shinjuku Green Tower Building 27F, 6-14-1, Nishi Shinjuku,
Shinjuku-ku, Tokyo, 160-0023 Japan
Tel. +81 (03) 3349-5501, Fax. +81 (03) 3349-5505
GENNUM UK LIMITED
25 Long Garden Walk, Farnham, Surrey, England GU9 7HX
Tel. +44 (0)1252 747 000 Fax +44 (0)1252 726 523
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 2002 Gennum Corporation. All rights reserved. Printed in Canada.
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GS9064
E
1
INCH
Symbol
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