DS91M047
125 MHz Quad M-LVDS Driver
Evaluation Kit
USER MANUAL
Part Number: DS91M047EVK NOPB
For the latest documents concerning these products and evaluation kit, visit lvds.national.com. Schematics and
gerber files are also available at lvds.national.com
June 17, 2008
Rev. 1.0
1
© 2008, National Semiconductor Corp.
Overview
The purpose of this document is to familiarize you with the DS91M047 evaluation board, suggest the test setup
procedures and instrumentation, and to guide you through some typical measurements that will demonstrate the
performance of the device. The board enables the user to examine performance and all functions of the
DS91M047 as a standalone device.
The DS91M047 is a high-speed quad M-LVDS differential line driver designed for multipoint applications with
multiple drivers or receivers. The device conforms to TIA/EIA-899 standard. It utilizes M-LVDS technology for
low power, high-speed and superior noise immunity.
Description
Figure 1 below represents the top layer drawing of the board with the silkscreen annotations. It is a 2.5 x 3 inch
4 layer printed circuit board (PCB) that features a single DS91M047 (U1) device.
JP1
H
B0
A0
L
EN
DI0
A1
National
Semiconductor
0.625"
125 MHz Quad M-LVDS Driver
P/N: DS91M047EVK
DI1
J1
B1
J2
U1
3"
DS91M047
3.3 V
GND
DI2
B2
DI3
A2
JP2
H
B3
A3
L
EN*
2.5"
Figure 1 - DS91M047EVK Top View Drawing
June 17, 2008
Rev. 1.0
2
© 2008, National Semiconductor Corp.
DS91M047 Evaluation in a Point-to-Point Link
The following is a recommended procedure for using and evaluating the DS91M047EVK. Figure 2 depicts a
typical setup and instrumentation used.
1. Select a single DS91M047 evaluation board.
2. Apply the power to the board (3.3 V typical) between J1 and J2 power tabs, observe the value of ICC,
and compare it with the expected value (refer to the datasheet) to ensure that the devices are
functional.
3. Enable U1 driver outputs. This is accomplished by setting the EN pin to VDD (JP1) or EN* pin to GND
(JP2).
4. Connect a signal source to one of the driver inputs (DI0-3).
5. Connect one of the U1 outputs (A0-3/B0-3) to an oscilloscope and observe the waveforms.
Figure 2 – DS91M047 Test Setup
June 17, 2008
Rev. 1.0
3
© 2008, National Semiconductor Corp.
Figure 3 shows an eye diagram acquired at the output of the DS91M047 driver loaded with a 100-ohm resistor.
The generator connected to the driver input simulated a 100 Mbps PRBS-7 NRZ.
Figure 3 – DS91M047 Output
June 17, 2008
Rev. 1.0
4
© 2008, National Semiconductor Corp.
ENERCON -
BILL OF MATERIALS
TITLE:
Main Product:
1 PCB
Rev: Rev By: Rev Date:
PL Number:
Z3250-01 1
BJ
Responsible Eng/Mgr:
DS91M047
PCBA, DS91M047EVK, ROHS
Item Part Type
NATIONAL SEMICONDUCTOR
PCBA, DS91M047EVK, ROHS
Part Number/Value
Mfg
NoSub
Description
Qty
PL Status:
Released
Creator:
Creation Date:
Arlene Fox
03/13/08
Ref Des
SMT
04/30/08
Notes
1
Rev
P-06540R0
ENERCON
0
Z3211-04
ENERCON
LABEL, MADE IN U.S.A.
1
DS91M047TMA
NAT
125MHz Line Driver, SOIC16, Pb-Free
1
X
U1
0
7 CAP
06035C103KAT
AVX
.01µF, 50V, ±10%, 0603, Ceramic, X7R,
Pb-Free
2
X
C3,6
0
8 CAP
0603YC104KAT
AVX
.1µF, 16V, ±10%, 0603, Ceramic, X7R, PbFree
2
X
C2,4
0
9 CAP
TAJA106K016
AVX
10µF, 16V, ±10%, A-Case, Tantalum, PbFree
1
X
C1
0
11 CONN
1287
KEYSTONE
Faston, Male, .250", Pb-Free
2
J1,2
0
12 CONN
142-0701-851
EMERSON
SMA, Jack Receptacle, 50 OHM, Pb-Free
SMA1-12
0
13 CONN
15-29-1024
MOLEX
Jumper Shunt, 2p, Gold, Pb-Free
2
14 CONN
TSW-103-07-G-S
SAMTEC
Header, 3p, Male, .100"sp, Gold, Pb-Free
2
T-06543R0
ENERCON
STENCIL FABRICATION, TOP,
DS91M047EVK/DS91M124E...
1
18 REF
C-06541R0
ENERCON
FAB DWG,
DS91M047EVK/DS91M124EVK/DS91M125EVK
0
19 REF
C-06542R0
ENERCON
PALLET DWG,
DS91M047EVK/DS91M124EVK/DS91M125EVK
0
20 REF
S-06539R0
ENERCON
SCHEMATIC,
DS91M047EVK/DS91M124EVK/DS91M125EVK
0
2
3 SUBASY
Apply to bottom
of PCBA
1
4
5 IC
6
10
12
Use on JP1,2
Pins 2&3
JP1,2
0
0
15
16 STENCL
0
17
21
10:30:50 AM, 06/17/08
Confidential and Proprietary. This document is considered uncontrolled unless stamped otherwise.
Page
1 of 2
ENERCON -
BILL OF MATERIALS
TITLE:
Main Product:
NATIONAL SEMICONDUCTOR
PCBA, DS91M047EVK, ROHS
PL Number:
Rev: Rev By: Rev Date:
Z3250-01 1
Responsible Eng/Mgr:
DS91M047
PCBA, DS91M047EVK, ROHS
BJ
04/30/08
PL Status:
Released
Creator:
Creation Date:
Arlene Fox
03/13/08
Notes:
DO NOT STUFF:
U2
M1-10
JP3,4,5,6
R1-15
T1-2,7,15,17,19,21,23,3,11,12,16,18,20,22,24
J3,4
C5,7,8,9,10
SMA13-22
10:30:50 AM, 06/17/08
Confidential and Proprietary. This document is considered uncontrolled unless stamped otherwise.
Page
2 of 2
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