DS10CP152EVK/NOPB

1.5 Gbps 2x2 LVDS Crosspoint Switch DS10CP152 Evaluation Kit USER MANUAL Part Number: DS10CP152EVK 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. November 2007 Rev. 0.1 DS10CP152EVK User Manual Table of Contents Table of Contents ..................................................................................................................... 2 Overview................................................................................................................................... 3 Description................................................................................................................................ 4 Evaluation................................................................................................................................. 5 Switch Configuration Truth Tables ........................................................................................... 6 Typical Performance ................................................................................................................ 7 Page 2 of 7 DS10CP152EVK User Manual Overview The DS10CP152EVK is an evaluation kit designed for demonstrating performance of the DS10CP152, a 1.5 Gbps 2x2 LVDS Crosspoint Switch. The evaluation kit is comprised of the DS10CP152 with its associated input and output SMA connectors and jumpers to manually configure the switch. The purpose of this document is to familiarize the user with the DS10CP152EVK, to suggest test setup procedures and instrumentation to test the device optimally, and to guide the user through some typical measurements that demonstrate the performance of the DS10CP152 in typical applications. Figure 1. Photo of the DS10CP152EVK Page 3 of 7 DS10CP152EVK User Manual Description Figure 2 shows the top layer drawing of the PCB with the silkscreen annotations. The 4.5 by 4.0 inch, four-layer PCB is designed to evaluate the functions of the DS10CP152. 0.75" NATIONAL LOGO 0.75" P/N: DS10CP152EVK SERIAL NUMBER 0.625" DS10CP152 IN0 OUT0 R3 and R4 Footprints 0.625" 0.625" 0.625" JP1 JP2 JP4 JP5 0.625" IN1 OUT1 H 0.625" VSS SEL1 SEL0 EN1 EN0 L VDD 0.75" 0.75" 4.5" x 4.0" PCB Figure 2. Top Layer Floor Plan of the DS10CP152EVK Page 4 of 7 DS10CP152EVK User Manual Evaluation This section provides recommended test setup procedure for the device evaluation. Figure 3 depicts a typical setup and instrumentation you may use for the device evaluation. 1. Configure the test setup as shown in Figure 3. 2. Set and enable the desired INn to OUTn drivers by selecting SEL0, SEL1, EN0 and EN1 according to Tables 1 – 2. 3. Apply + supply (3.3V typical) to the VDD and – supply (ground) to the VSS connectors. 4. Connect a signal source (signal generator, data source, or an LVDS driver) to the desired INn inputs on the board and adjust the signal parameters (VOH, VOL, VCM) so that they comply with the device input recommendations. 5. Connect an oscilloscope to the selected OUTn outputs and view the output signals with an oscilloscope with the analog bandwidth of at least 3 GHz. Figure 3. DS10CP152 Test Setup Example Page 5 of 7 DS10CP152EVK User Manual Switch Configuration Truth Tables SEL1 0 0 1 1 SEL0 0 1 0 1 OUT1 IN0 IN0 IN1 IN1 OUT0 IN0 IN1 IN0 IN1 Table 1. Switch Configuration Truth Table EN1 0 0 1 1 EN0 0 1 0 1 OUT1 Disabled Disabled Enabled Enabled Table 2. Output Enable Truth Table Page 6 of 7 OUT0 Disabled Enabled Disabled Enabled DS10CP152EVK User Manual Typical Performance This section of the User Manual shows a typical eye diagram you can expect to see when evaluating the DS10CP152EVK. Figure 4. DS10CP152 1.5 Gbps NRZ PRBS-7 Output Eye Diagram Page 7 of 7 1.5 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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