GS3490 Datasheet, PDF (9/22 Pages) Semtech Corporation – Configurable Adaptive Cable Equalizer/Cable Driver

Table 2-4: AC Electrical Characteristics - Cable Driver Mode
V_CC = +3.3V ± 5%, T_A= -20°C to +85°C (unless otherwise shown), Functional Temperature Range: -40°C to +85°C
Parameter
Symbol Conditions
Min Typ Max
Serial Data Rate
DR_DDI
–
2.97Gb/s
270
–
2970
–
15
25
Additive Jitter
–
1.485Gb/s
–
15
25
SDO Rise/Fall Time
Mismatch in Rise/Fall
Time
Duty Cycle Distortion
Overshoot
Output Return Loss
SDO Output Voltage
Swing
t_r, t_f
t_r, t_f
Δt_r, Δt_f
–
–
ORL
ΔV_SDO
270Mb/s
CD_SD_EN = 0, 20% - 80%
CD_SD_EN = 1, 20% - 80%
CD_SD_EN = 0 only
CD_SD_EN = 0, 2.97Gb/s
CD_SD_EN= 0, 1.485Gb/s
CD_SD_EN = 1
CD_SD_EN = 0
5MHz - 1.485GHz
1.485GHz - 2.97GHz
R_SET = 750Ω
–
55
85
–
–
135
400
–
950
–
–
35
–
–
14
–
–
20
–
–
50
–
–
10
15
–
–
10
–
–
750
800
880
Guaranteed functional
100
–
DDI/DDI Input Voltage
Swing
ΔV_DDI
Guaranteed to meet all published
specifications
250
–
Cable Driver Mode
Enable Delay
–
–
–
0.25
Notes:
1. Single-ended into 75Ω external load.
2. Calculated as the actual positive bit-width compared to the expected positive bit-width using a 1010 pattern.
3. ORL depends on board design. The GS3490 achieves this specification on Semtech's evaluation boards.
250
2200
–
Units Notes
Mb/s
–
ps_pp
–
ps_pp
–
ps_pp
–
ps
–
ps
–
ps
–
ps
1, 2
ps
1, 2
ps
1, 2
%
1
dB
3
dB
3
mV_pp
1
mV_ppd
–
mV_ppd
–
μs
–
GS3490
Final Data Sheet
GENDOC-058568
Rev. 1
April 2014
www.semtech.com
9 of 22
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