GS2984 Datasheet, PDF (4/20 Pages) Gennum Corporation – GS2984 Adaptive Cable Equalizer

1. Pin Out
1.1 GS2984 Pin Assignment
VEE_A
SDI
SDI
GAIN_SEL
16
15
14
13
1
12
2
GS2984
11
16-pin QFN
3
(top view)
10
4
9
5
6
7
8
Ground Pad
(bottom of package)
VEE_D
SDO
SDO
CMSET
Figure 1-1: GS2984 Pin Out
1.2 GS2984 Pin Descriptions
Table 1-1: GS2984 Pin Descriptions
Pin Number
1
Name
VEE_A
Timing
Analog
2, 3
SDI, SDI
Analog
4
GAIN_SEL
Not
Synchronous
5, 6
AGC, AGC
Analog
7
BYPASS
Not
Synchronous
Type
Power
Input
Input
–
Input
Description
Most negative power supply for analog circuitry.
Connect to GND.
Serial digital differential input.
CONTROL SIGNAL INPUT
levels are LVCMOS/LVTTL compatible.
(3.3V tolerant) Controls flat band gain. See Section 4.6. (Internal
pull-down).
External AGC capacitor.
Connect pin 5 and pin 6 together as shown in the Typical
Application Circuit on page 16.
Forces the Equalizing and DC RESTORE stages into bypass mode
when HIGH. No equalization occurs in this mode. (Internal
pull-down).
GS2984 Adaptive Cable Equalizer
Data Sheet
50985 - 3
March 2010
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