EB-GS6080
Evaluation Board User Guide Rev. 1
PDS-060159 February 2014
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Contents
1. Evaluation Board User Guide ....................................................................................................................4
1.1 SDI Inputs and Outputs ..................................................................................................................4
1.2 Power ....................................................................................................................................................4
1.3 Switch Settings ..................................................................................................................................5
1.4 Measuring ORL ..................................................................................................................................5
1.5 Signal Presence Indicator ..............................................................................................................6
2. Schematics .......................................................................................................................................................7
3. Board Layout...................................................................................................................................................8
4. Bill of Materials...............................................................................................................................................9
Version ECO Date Changes and / or Modifications
1 018072 February 2014
Modifications to User Guide due to new board
revision. USB connector added to board.
0 016078 October 2013 New document.
EB-GS6080
Evaluation Board User Guide Rev. 1
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General Description
The EB-GS6080 evaluation package is designed to accelerate the evaluation process of
the GS6080 6G UHD-SDI/3G/HD/SD Cable Driver.
It is strongly recommended to read the GS6080 Data Sheet (DocID: PDS-060045) before
using this evaluation kit.
Evaluation Kit Contents
• Semtech EB-GS6080 Evaluation Board
• CD containing GS6080 Collateral
Overview
The purpose of the EB-GS6080 Evaluation Board is to evaluate the GS6080
6G UHD-SDI/3G/HD/SD Cable Driver. This device is designed to support SMPTE ST 2081
(proposed standard), SMPTE ST 424, SMPTE ST 292, and SMPTE ST 259 and it is
optimized for performance at 270Mb/s, 1.485Gb/s, 2.97Gb/s, and 5.94Gb/s.
Block Diagram of the EB-GS6080
BNC
P
N
P
N
RSET
External Power Supply
or USB
+-
OSP
VCC
GS6080
Control
Switch
SD/HD
ORL
SMA
SMA
EQEN
DISABLE
75Ω
750Ω
LED
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Evaluation Board User Guide Rev. 1
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1. Evaluation Board User Guide
Figure 1-1 shows the inputs, outputs and power connections for the EB-GS6080.
Figure 1-1: GS6080 Evaluation Board (EB-GS6080)
1.1 SDI Inputs and Outputs
The GS6080 is a high-speed BiCMOS integrated circuit designed to drive one or two 75Ω
coaxial cables. The EB-GS6080 is the Evaluation Board for the GS6080. It features one
pair of 100Ω differential inputs through SMA connectors (J3, J4) and one 75Ω
single-ended output through a BNC connector (J10).
1.2 Power
The EB-GS6080 Evaluation Board features three discrete methods of powering the
board. Refer to the GS6080 Data Sheet (DocID: PDS-060045) for more information on the
necessary power requirements of the device. The power supply types are described in
Table 1-1 below.
Note: Only one method of supplying power should be used at any time.
DDI
(J3)
DDI
(J4)
Control Switch
(SW1)
OSP (D1)
SDO1
(J10)
5V
(TP1)
3V3
(TP2)
GND(TP3)
Micro USB Port
(Power Only)
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1.3 Switch Settings
A three-point dip switch (SW1) allows for input selection. The switch is simply used to
override the default states of the three input pins as described in the Table 1-2 below.
Note: Trace Equalization is not available in SD mode, and therefore must be disabled
when operating in this mode.
Table 1-1: EB-GS6080 Board Power Supply Methods
Power Supply Type Description
USB connection
Attach a USB cable to connector J1 (see
Figure 1-1) and connect the other end to a
PC or USB power source. The cable required
is a USB A Male to USB Micro-B Male
connector.
External 5V Supply
Attach ground reference (GND) to TP3 and
attach the 5V supply to TP1.
External 3.3V Supply
Attach ground reference (GND) to TP3 and
attach the 3.3V supply to TP2.
Note: If using the external 3.3V supply,
resistor R6 must be removed.
Table 1-2: Switch Settings
Switch Label Switch Position Description
SD/HD
Output slew rate set for
UHD-SDI/3G/HD
Output slew rate set for SD (default
state)
EQEN
Typical 3dB Trace Equalization
Trace Equalization OFF
(default state)
DISABLE
Entire device is powered down
Outputs (SDO/SDO
) enabled
(default state)
HDSD
1
HDSD
1
EQEN
2
EQEN
2
DISABLE
3
DISABLE
3
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1.4 Measuring ORL
To measure Output Return Loss (ORL) on the EB-GS6080 board, follow these steps:
1. Set the cable driver in balance mode by setting EQEN and SD. DISABLE must not be
set. The balance mode table is given below.
2. The cable driver outputs are now balanced. ORL can now be measured
single-endedly using a Network Analyzer. Please refer to the GS6080 Data Sheet
(DocID: PDS-060045) for more information regarding balance mode.
1.5 Signal Presence Indicator
The EB-GS6080 features a green LED (D1) which indicates when a valid signal has been
detected at the pre-driver output. The LED remains off if no signal is detected
Table 1-3: Balance Mode Truth Table
EQ_EN SD/HD DISABLE BAL
Enabled SD No Yes
Enabled HD No No
Disabled SD No No
Disabled HD No No
XXYesNo
Note: ‘X’ indicates a “Don’t Care” condition
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2. Schematics
Figure 2-1: EB-GS6080 Schematic
100nF
1nH
10μF
14.7kΩ
GND
100nF 10μF
RED
2.61kΩ
VCC
BLACK
0Ω
100nF
ADJ
75Ω
VCC
75Ω
10nF
VCC
750Ω
220Ω
1kΩ
1kΩ
4.7μF
4.7μF
SMA
SMA
1kΩ
4.7μF
TBD TBD
VCC
GREEN
10nF
10nF
75Ω
75Ω
4.7μF
MMBT3906
VCC
SWDIP3
VCC
GS6080
VCC
ORANGE
3V3
SC4216H
5V
BNCRA
4.7nH
VCC
C7
C6
R8
R7
R6
C3
C1
C2
TP2
TP3
TP1
U1
C5
R4
C13C12
R11
SW1
R5
L1
R2
R1
J4
J3
R3
Q1
D1
L2
J10
C69
C70
C68
R68
R66
C66
R65
U12
C63
C64
DISABLE
EQEN
SD/HDB
63
TAB
5
41
8
72
4
5
6
3
2
1
32
1
3
2
1
1
3
2
2
1
1
2
3
9
TAB
11
12
10
4
14
15
13
8
7
5
16
6
2
1
VEE
VCC
NC5
NC4
OSP
NC3
DISABLE
NC2
NC1
SDO
SDO
SD/HD*
TAB
EQ_EN
RSET
DDI
DDI
TAB
GND
NC_5
VO
FB
NC_4
EN
VIN
NC_1
ON
1
C
B
E
RA
SMTRARCPTUSBBMICRO
D2
J1
2
SH6
SH5
SH4
SH3
SH2
SH1
4
5
2
3
SHELL6
SHELL5
SHELL4
SHELL3
ID
SHELL2
SHELL1
GND
D+
D-
VBUS
1
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4. Bill of Materials
Table 4-1: Bill of Materials
Quantity Reference Design Part
3 C1, C3, C6 Capacitor, Ceramic; 0.1μF 16V 10% X7R 0603
2 C2, C7 Capacitor, Tantalum; 10μF 10V 10% 3216/1206
3 C5, C66, C68 Capacitor, Ceramic; 10000pF 25V 10% X7R 0402
4 C63, C64, C69, C70 Capacitor, Ceramic; 4.7μF 6.3V 20% X5R 0402
1 D1 LED; Green TSS TYPE SMD
1 D2 Diode; Schottky 20V 3A SMA
1 J1 Connector; RCPT REV Micro-USB Type B
1 J10 3G/HD RA BNC PCIe with Simulated Footprint Ver. 2
2 J3, J4 SMA Edge Mount Short Signal Pin
1 L1 Inductor; 1.0nH 300mA 0402
1 L2 Inductor; 4.7nH 300mA 0402
1 Q1 Transistor; GP PNP AMP SOT23-3
3R1, R2, R11
Resistor; 1.00k
Ω 1/10W 1% 0603 SMD
1R3
Resistor; 220
Ω 1/10W 1% 0603 SMD
4 R4, R5, R66, R68
Resistor; 75.0
Ω 1/16W 1% 0402 SMD
1R6
Resistor; 0.0
Ω 1/8W 5% 0805 SMD
1R65
Resistor; 750
Ω 1/16W 1% 0402 SMD
1R7
Resistor; 14.7k
Ω 1/10W 1% 0402 SMD
1R8
Resistor; 2.61k
Ω 1/16W 1% 0402 SMD
1 SW1 Switch Tape Seal 3 POS SMD
1 TP1 Test Point RED
1 TP2 Test Point ORANGE
1 TP3 Test Point BLK
1 U1
Semtech SC4216H very low input dropout
3A regulator with enable
1 U12 GS6080 Cable Driver, 6Gb/s, Dual Slew Rate
Do Not Populate
2 C12, C13 Value To Be Determined
© Semtech 2013
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DOCUMENT IDENTIFICATION
EVALUATION BOARD USER GUIDE
The product is in a preproduction phase and specifications are subject to
change without notice.
EB-GS6080
Evaluation Board User Guide Rev. 1
PDS-060159 February 2014
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Contact Information
Semtech Corporation
Gennum Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805) 498-2111, Fax: (805) 498-3804
www.semtech.com
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