GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s

Capability

Data Sheet

52131 - 4

December 2010

7 of 17

2.3 AC Electrical Characteristics

Table 2-2: AC Electrical Characteristics

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Notes

Serial input data rate

–.27

–

2.97

Gb/s

1

Additive jitter

–

2.97Gb/s

–

10

–

2

–

1.485Gb/s

–

10

–

2

–

270Mb/s

–

30

–

2

Rise/Fall time

SD/HD=0

–

–

135

ps

3

SD/HD=1

400

–

800

ps

3

Mismatch in rise/fall time

HD/3G modes only

–

–

35

ps

–

Duty cycle distortion

–

SD/HD=0, 2.97Gb/s

–

–

14

ps

4, 5

–

SD/HD=0, 1.485Gb/s

–

–

20

ps

4, 5

–

SD/HD=1

–

–

50

ps

4, 5

Overshoot

–

SD/HD=0,

–

–

10

%

4

Output Return Loss

ORL

5 MHz – 1.485GHz

17

19

–

dB

6

1.485GHz – 2.97GHz

13

15

–

dB

6

Output Voltage Swing

750

800

850

4

Input Voltage Swing

Guaranteed

functional.

100

–

250

–

Guaranteed to meet all

published

specifications.

250

2200

–

Output Enable Delay

–

–

–

–

100

ns

–

Output Disable Delay

–

–

–

–

80

ns

–

NOTES:

1. The input coupling capacitor must be set accordingly for lower data rates.

2. Turning on input trace equalization will reduce jitter in most applications.

3. Rise/Fall time measured between 20% and 80%.

4. Single-ended into 75

Ω external load.

5. Calculated as the actual positive bit-width compared to the expected positive bit-width using a 1010 pattern.

6. ORL depends on board design. The GS2988 achieves this specification on Gennum's evaluation boards.