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GS1528B Datasheet(PDF) 10 Page - Gennum Corporation |
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GS1528B Datasheet(HTML) 10 Page - Gennum Corporation |
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10 / 14 page  GS1528B HD-LINX® II Multi-Rate Dual Slew-Rate Cable Driver Data Sheet 39623 - 4 August 2010 10 of 14 Figure 5-3: Static Protection Diodes 5.3 Output Return Loss Measurement To perform a practical return loss measurement, it is necessary to force the GS1528B output to a DC high or low condition. The actual measured return loss will be based on the outputs being static at VCC or VCC-1.6V. Under normal operating conditions the outputs of the device swing between VCC-0.4V and VCC-1.2V. 5.4 Output Amplitude Adjustment The output amplitude of the GS1528B can be adjusted by changing the value of the RSET resistor as shown in Table 5-1. For an 800mVp-p output with a nominal ±7% tolerance, a value of 750Ω is required. A ±1% SMT resistor should be used. The RSET resistor is part of the high speed output circuit of the GS1528B. The resistor should be placed as close as possible to the RSET pin. In addition, the PCB capacitance should be minimized at this node by removing the PCB groundplane beneath the RSET resistor and the RSET pin. SDO SDO GS1528B Table 5-1: RSET vs VOD RSET R (Ω) Output Swing (mVp-p) 995 608 824 734 750 800 680 884 573 1040 NOTE: For reliable operation of the GS1528B over the full temperature range, do not use an RSET value below 573Ω. |
Similar Part No. - GS1528B |
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Similar Description - GS1528B |
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