3.125 Gbps LVDS Buffers with Pre-emphasis and Equalization (DS25BR100/110/120) Evaluation Kit USER MANUAL Part Number: DS25BR100EVK 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. March 2007 Rev. 0.
DS25BR100EVK User Manual Table of Contents Table of Contents ................................................................................................................................... 2 Overview ................................................................................................................................................ 3 DS25BR100EVK Description................................................................................................................
DS25BR100EVK User Manual Overview The DS25BR100EVK is an evaluation kit designed for demonstrating performance of the 3.125 Gbps LVDS Single Channel Buffers with Transmit Pre-emphasis and Receive Equalization family (DS25BR100, DS25BR110 and DS25BR120). The evaluation kit provides all three devices on a single board and three FR4 striplines (14 (~35), 28 (~75) and 42 (~105) inches (cm) in length) for exercising devices’ signal conditioning features (pre-emphasis and equalization).
DS25BR100EVK User Manual DS25BR100EVK Description Figure 1 shows the top layer drawing of the PCB with the silkscreen annotations. It is a 4.5 by 4.5 inch eight-layer PCB that has a three-device layout capable of demonstrating performance and all features of the DS25BR100, DS25BR110 and DS25BR120. In addition, three microstrips allow easy evaluation of transmit pre-emphasis and receive equalization. Figure 1.
DS25BR100EVK User Manual DS25BR100 (U1) Evaluation The DS25BR100 is a 3.125 Gbps LVDS buffer featuring two levels of transmit pre-emphasis (Off and Medium) and two levels of receive equalization (Low and Medium). The following is a recommended test setup procedure for the device evaluation. Figure 2 depicts a typical setup and instrumentation used for the device evaluation. 1. Apply the power to the device (3.3V typical) between VDD and VSS banana plug receptacles. 2.
DS25BR100EVK User Manual DS25BR110 (U2) Evaluation The DS25BR110 is a 3.125 Gbps LVDS buffer featuring four levels of receive equalization (Off, Low, Medium and High). The following is a recommended test setup procedure for the device evaluation. Figure 3 depicts a typical setup and instrumentation used for the device evaluation. 1. Apply the power to the device (3.3V typical) between VDD and VSS banana plug receptacles. 2.
DS25BR100EVK User Manual DS25BR120 (U3) Evaluation The DS25BR120 is a 3.125 Gbps LVDS buffer featuring four levels of transmit pre-emphasis (Off, Low, Medium and High). The following is a recommended test setup procedure for the device evaluation. Figure 4 depicts a typical setup and instrumentation used for the device evaluation. 1. Apply the power to the device (3.3V typical) between VDD and VSS banana plug receptacles. 2.
DS25BR100EVK User Manual Typical Performance This section of the User Manual shows typical eye diagrams you can expect to see when evaluating the DS25BR100EVK. The DS25BRxxx 3.125 Gbps PRBS-7 output eye diagram without any STRIPLINE connected and with PE/EQ = Off The DS25BRxxx 3.125 Gbps PRBS-7 output eye diagram after the STRIPLINE 3 and with PE/EQ = Off The DS25BR120 3.125 Gbps PRBS-7 output eye diagram after the STRIPLINE 3 and with PE = High. See Figure 4 for the Setup used. The DS25BR110 3.
ENERCON - BILL OF MATERIALS TITLE: Main Product: NATIONAL SEMICONDUCTOR DS25BR100EVK ROHS PCBA, DS20BR100-EVK, Rev: Rev By: Rev Date: PL Number: Z3016-01 2 BJ Responsible Eng/Mgr: PCBA, DS25BR100EVK DS20BR100-EVK, ROHS Item Part Type 1 PCB Part Number/Value Mfg P-05479R0 NoSub Description DS25BR100: 4.50x4.50x.062in, 8 layer Qty PL Status: 3/1/2007 Creation Date: Arlene Fox 10/26/2006 Ref Des SMT 1 Released Creator: Notes Rev Bd: (114.30x 114.30mm) Panel: ( 4.50x13.70in) (114.
ENERCON - BILL OF MATERIALS TITLE: Main Product: NATIONAL SEMICONDUCTOR DS25BR100EVK ROHS PCBA, DS20BR100-EVK, PL Number: Rev: Rev By: Rev Date: Z3016-01 2 BJ Responsible Eng/Mgr: PCBA, DS25BR100EVK DS20BR100-EVK, ROHS Item Part Type Part Number/Value Mfg Description NoSub Qty 24 PL Status: 3/1/2007 Creation Date: Arlene Fox 10/26/2006 Ref Des SMT Released Creator: Notes Rev 12 CONN 142-0701-851 EMERSON SMA, Jack Receptacle, 50 OHM, Pb-Free SMA1-24 0 13 CONN 3267 POMONA
DS25BR100EVK
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