GS2978 Datasheet, PDF (6/15 Pages) Gennum Corporation – Dual coaxial cable driving outputs with selectable slew rate

Table 2-1: DC Electrical Characteristics
V_CC = 3.3V ±5%; T_A = 0°C to 70°C, unless otherwise shown
Parameter
Symbol Conditions
Min
Typ
Input Voltage
V_CMIN
Common mode
1.4 + ΔV_DDI/2
–
SD/HD, DISABLE Input
V_IH
I_IH <= 10 μA
2.0
–
V_IL
I_IL <= 10 μA
–
–
2.3 AC Electrical Characteristics
Max
V_CC - ΔV_DDI/2
–
0.8
Units
V
V
V
Table 2-2: AC Electrical Characteristics
V_CC = 3.3V ±5%; T_A = 0°C to 70°C, unless otherwise shown
Parameter
Symbol Conditions
Min
Typ
Max
Serial input data rate
Additive jitter
DR_SDO
–
–
2.97Gb/s
–
–
2.97
–
22
–
–
1.485Gb/s
–
20
–
–
270Mb/s
–
16
–
Rise/Fall time
t_r, t_f
SD/HD=0
–
–
135
Mismatch in rise/fall time
t_r, t_f
Ut_r, Ut_f
SD/HD=1
–
400
–
800
–
–
35
Duty cycle distortion
–
SD/HD=0, 2.97 Gb/s
–
–
27
–
SD/HD=0, 1.485 Gb/s
–
–
30
–
SD/HD=1
–
–
100
Overshoot
–
SD/HD=0,
–
SD/HD=1
–
–
10
–
–
8
Output Return Loss
ORL
5 MHz – 1.485 GHz
15
20
–
1.485 GHz – 2.97 GHz
10
12
–
Output Voltage Swing
Input Voltage Swing
V_OUT
UV_DDI
R_SET = 750Ω
Differential
750
800
850
100
–
2200
NOTES:
1. The input coupling capacitor must be set accordingly for lower data rates.
2. Rise/Fall time measured between 20% and 80%.
3. Single Ended into 75Ω external load.
4. ORL depends on board design. The GS2978 achieves this specification on Gennum's evaluation boards.
Units
Gb/s
ps_p-p
ps_p-p
ps_p-p
ps
ps
ps
ps
ps
ps
%
%
dB
dB
mV_p-p
mV_p-p
Notes
1
–
–
–
2
2
–
3
3
3
3
3
4
4
3
–
GS2978
HD-LINX® III Multi-Rate Dual Slew-Rate Cable Driver
Data Sheet
37186 - 7
March 2009
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