GS2964 Adaptive Cable Equalizer

Data Sheet

51913 - 3

March 2010

13 of 17

5. Application Information

5.1 PCB Layout

Special attention must be paid to component layout when designing Serial Digital

Interfaces for HDTV. An FR-4 dielectric can be used, however, controlled impedance

transmission lines are required for PCB traces longer than approximately 1cm. Note the

following PCB artwork features used to optimize performance:

• PCB trace width for 3Gb/s rate signals is closely matched to SMT component width

to minimize reflections due to change in trace impedance.

• The PCB ground plane is removed under the GS2964 input components to minimize

parasitic capacitance.

• The PCB ground plane is removed under the GS2964 output components to

minimize parasitic capacitance.

• High speed traces are curved to minimize impedance changes.

5.2 Typical Application Circuit

Figure 5-1: GS2964 Typical Application Circuit

GS2964

SDI

SDI

VEE_D

VEE_A

NOTE: All resistors in Ohms, capacitors in Farads,

and inductors in Henrys, unless otherwise noted.

* Value dependent on layout

NC

SDO

SDO

NC

10n

1

10n

4u7

4u7

+

+

SDO

SDO

CD

MUTE

VCC

BYPASS

SQ_ADJ

470n

6.2n*

75

SDI

1u

75

1u

37R4

VCC

4

5

6

2

3

8

7

16

12

13

11

14

15

9

10

470n