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GS1528-CKA

HD-LINX™ II Multi-Rate SDI Dual Slew-Rate Cable Driver

Gennum -> Semtech 

GS1528 Data Sheet

3.5 Output Amplitude Adjustment

The output amplitude of the GS1528 can be adjusted by changing the value of the

RSET resistor as shown in Figure 3-4 and Table 3-1: RSET vs VOD. For an

800mVp-p output with a nominal ±7% tolerance, a value of 750Ω is required. A ±1%

SMT resistor should be used.

1100

1000

900

800

700

600

500

600

700

800

RSET R (Ω)

900

1000

Figure 3-4: Output Amplitude Adjustment

The RSET resistor is part of the high speed output circuit of the GS1528. 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.

Table 3-1: RSET vs VOD

RSET R (Ω)

995

824

750

600

573

Output Swing

608

734

800

884

1040

NOTE: For reliable operation of the GS1528 over the full temperature range, do not

use an RSET value below 573Ω.

16632 - 5 June 2005

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