GS3490 Datasheet, PDF (8/22 Pages) Semtech Corporation – Configurable Adaptive Cable Equalizer/Cable Driver

2.3 AC Electrical Characteristics
Table 2-3: AC Electrical Characteristics - Equalizer 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 Units Notes
Serial Data Rate
DR_SDI
–
125
–
2970 Mb/s
1
SDI/SDI Input Voltage
Swing
ΔV_SDI
270Mb/s and 1.485Gb/s
2.97Gb/s
720
800
950 mV_ppd
2
720
800
880 mV_ppd
2
DDO/DDO Output
Voltage Swing
100Ω load, EQ_OP_CTL set for high
swing
700
ΔV_DDO
100Ω load, EQ_OP_CTL set for low
swing
350
850
1000 mV_ppd
–
425
500 mV_ppd
–
2.97Gb/s Belden 1694A: 0-140m
–
0.2
0.45
UI
3, 4
1.485Gb/s Belden 1694A: 0-200m
–
–
0.2
UI
3, 4
DDO/DDO Output Jitter
–
1.485Gb/s Belden 1694A: 200-260m
–
0.3
0.4
UI
3, 4
270Mb/s Belden 1694A: 0-300m
–
0.1
0.2
UI
3, 4
270Mb/s Belden 1694A: 300-500m
–
0.2
0.3
UI
3, 4
1.485Gb/s and 2.97Gb/s, 20% - 80%
–
75
–
ps
–
DDO/DDO Rise/Fall Time
t_r, t_f
270Mb/s, 20% - 80%
–
150
–
ps
–
Mismatch in Rise/Fall Time Δt_r, Δt_f –
–
–
30
ps
–
Duty cycle distortion
–
SD/HD/3G
–
–
30
ps
–
Overshoot
–
–
–
–
10
%
–
Input Return Loss
5MHz - 1.485GHz
–
1.485GHz - 2.97GHz
15
–
10
–
–
dB
5
–
dB
5
SDI/SDI Input Resistance
–
Single-ended
–
1.9
–
kΩ
–
SDI/SDI Input
Capacitance
–
Single-ended
–
1.3
–
pF
–
DDO/DDO Output
Resistance
–
Single-ended
–
50
–
W
–
Equalizer Mode Enable
Delay
–
–
–
1
–
μs
–
Notes:
1. Device performance is optimized for standard data rates (SD = 270Mb/s, HD = 1.485Gb/s, 3G = 2.970Gb/s).
2. 0m cable length.
3. All parts are production tested. In order to guarantee jitter over the full range of specification (V_CC = 3.3V ±5%, T_A = -40°C to +85°C, and
720-880mV launch swing from a SMPTE compliant cable driver) the recommended applications circuit must be used.
4. Based on validation data using the recommended circuit, at V_CC = 3.3V, T_A = 25°C and 800mV launch swing from a SMPTE compliant cable driver.
5. IRL depends on board design. The GS3490 achieves this specification on Semtech‘s evaluation boards.
GS3490
Final Data Sheet
GENDOC-058568
Rev. 1
April 2014
www.semtech.com
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