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GS1528 HD-LINXTM II
Multi-Rate SDI
Dual Slew-Rate Cable Driver
GS1528 Data Sheet
16632 - 5
June 2005
1 of 13
Features
SMPTE 292M, SMPTE 344M and SMPTE 259M
compliant
dual coaxial cable driving outputs with selectable
slew rate
50
differential PECL input
seamless interface to other HD-LINX
TM
II family
products
Pb-free and RoHS Compliant
single 3.3V power supply operation
operating temperature range: 0C to 70C
Applications
SMPTE 292M, SMPTE 344M and SMPTE 259M
Coaxial Cable Serial Digital Interfaces.
Description
The GS1528 is a second generation high-speed bipolar
integrated circuit designed to drive one or two 75
co-axial cables at data rates up to 1.485Gb/s. The
GS1528 provides two selectable slew rates in order to
achieve compliance to SMPTE 259M, SMPTE 344M
and SMPTE 292M.
The GS1528 accepts a LVPECL level differential input
that may be AC coupled. External biasing resistors at
the inputs are not required.
Power consumption is typically 160mW using a 3.3V
power supply.
This component and all homogeneous subcomponents
are ROHS compliant.
Functional Block Diagram
SDO
R
SET
SDO
SDI
SDI
SD/HD
BANDGAP REFERENCE AND BIASING CIRCUIT
OUTPUT STAGE &
CONTROL
INPUT
DIFFERENTIAL
PAIR
GS1528 Data Sheet
16632 - 5
June 2005
2 of 13
Contents
Features ........................................................................................................................1
Applications...................................................................................................................1
Description ....................................................................................................................1
1. Electrical Characteristics...........................................................................................3
1.1 Absolute Maximum Ratings ............................................................................3
1.2 DC Electrical Characteristics ..........................................................................3
1.3 AC Electrical Characteristics ...........................................................................4
2. Pin Out ......................................................................................................................5
2.1 Pin Assignment ...............................................................................................5
2.2 Pin Descriptions ..............................................................................................5
2.3 Input/Output Circuits .......................................................................................6
3. Detailed Description ..................................................................................................7
3.1 Input Interfacing ..............................................................................................7
3.2 SD/HD .............................................................................................................7
3.3 Output Interfacing ...........................................................................................7
3.4 Output Return Loss Measurement ..................................................................9
3.5 Output Amplitude Adjustment .......................................................................10
4. Application Information............................................................................................11
4.1 PCB Layout ...................................................................................................11
4.2 Typical Application Cirucit .............................................................................11
5. Package Dimensions ..............................................................................................12
5.1 Ordering Information .....................................................................................12
6. Revision History ......................................................................................................13
GS1528 Data Sheet
16632 - 5
June 2005
3 of 13
1. Electrical Characteristics
1.1 Absolute Maximum Ratings
T
A
= 25C unless otherwise indicated
1.2 DC Electrical Characteristics
Parameter
Value
Supply Voltage
-0.5V to 3.6 V
DC
Input ESD Voltage
500V
Storage Temperature Range
-50C < T
s
< 125C
Input Voltage Range (any input)
-0.3 to (V
CC
+0.3)V
Operating Temperature Range
0C to 70C
Power Dissipation
300mW
Lead Temperature (soldering, 10 sec)
260C
CAUTION The GS1528 is sensitive to electrostatic discharge. Use extreme caution,
observing all ESD-prevention practices, during handling and assembly. The SDI inputs
of the GS1528 must be protected from electrostatic discharge and electrical overstress
during the handling and operation of circuit assemblies
Table 1-1: DC Electrical Characteristics
V
DD
= 3.3V, T
A
= 0C to 70C, unless otherwise shown
Parameter
Conditions
Symbol
Min
Typ
Max
Units
Notes
Test
Levels
Supply Voltage
V
CC
3.135
3.3
3.465
V
5%
3
Power Consumption
T
A
= 25C
P
D
160
mW
5
Supply Current
T
A
= 25C
s
48
mA
1
Output Voltage
Common mode
V
CMOUT
V
CC
- V
OUT
6
Input Voltage
Common mode
V
CMIN
1.6 +
V
SDI
/2
V
CC
-
V
SDI
/2
V
5
SD/HD Input
V
IH
2.4
V
7
V
IL
0.8
V
7
GS1528 Data Sheet
16632 - 5
June 2005
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1.3 AC Electrical Characteristics
Table 1-2: AC Electrical Characteristics
V
DD
= 3.3V, T
A
= 0C to 70C, unless otherwise shown
Parameter
Conditions
Symbol
Min
Typ
Max
Units
Notes
Test
Levels
Serial input data rate
DR
SDO
1.485
Gb/s
2
1
Additive jitter
1.485Gb/s
15
ps
p-p
1
270Mb/s
25
ps
p-p
1
Rise/Fall time
SD/HD=0
t
r
, t
f
220
ps
20% to 80%
1
SD/HD=1
t
r
, t
f
400
800
ps
20% to 80%
1
Mismatch in rise/fall
time
t
r
, t
f
30
ps
1
Duty cycle distortion
30
ps
1
Overshoot
8
%
1
Output Return Loss
ORL
15
dB
1
7
Output Voltage Swing
Single Ended
into 75
external
load
R
SET
= 750
V
OUT
750
800
850
mV
p-p
1
Input Voltage Swing
Differential
V
SDI
300
2000
mV
p-p
1
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.
NOTES:
1. Tested on CB1528 board from 5MHz to 1.435GHz
2. The input coupling capacitor must be set accordingly for lower data rates.
GS1528 Data Sheet
16632 - 5
June 2005
5 of 13
2. Pin Out
2.1 Pin Assignment
Figure 2-1: 8-Pin SOIC
2.2 Pin Descriptions
SDI
SDI
V
EE
R
SET
SDO
SDO
SD/HD
V
CC
1
2
3
4
8
7
6
5
GS1528
8 PIN SOIC
TOP VIEW
Table 2-1: Pin Descriptions
Pin Number
Name
Type
Description
1,2
SDI, SDI
PECL INPUT
Serial digital differential input.
4
R
SET
INPUT
External output amplitude control resistor.
6
SD/HD
LOGIC INPUT
Output slew rate control. When HIGH, the output will meet SMPTE259M
rise/fall time specifications. When LOW, the serial outputs will meet
SMPTE292M rise/fall time specifications.
7, 8
SDO, SDO
OUTPUT
Serial digital differential output.
3
V
EE
POWER
Most negative power supply connection. Connect to GND.
5
V
CC
POWER
Most positive power supply connection. Connect to +3.3V.
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