MAX14950 Datasheet, PDF (4/17 Pages) Maxim Integrated Products – Quad PCI Express Equalizer/Redriver

MAX14950
Quad PCI Express Equalizer/Redriver
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +3.0V to +3.6V, CCL = 200nF coupling capacitor on each output, RL = 50I on each output, TA = 0NC to +70NC, unless oth-
erwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Note 3)
PARAMETER
AC PERFORMANCE (Note 4)
Differential Input Return Loss
Common-Mode Input Return
Loss
Differential Output Return Loss
Common-Mode Output Return
Loss
Redriver Operation Differential
Input-Signal Range
Full-Swing Differential Output
Voltage (No Deemphasis)
Output Deemphasis Ratio, 0dB
SYMBOL
CONDITIONS
RLRX-DIFF
RLRX-CM
RLTX-DIFF
RLTX-CM
VRX-DIFF-
PP
VTX-DIFF-
PP
VTX-DE-
RATIO-0dB
f = 0.05GHz to 1.25GHz
f = 1.25GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 1.25GHz
f = 1.25GHz to 2.5GHz
f = 2.5GHz to 4GHz
f = 0.05GHz to 2.5GHz
f = 2.5GHz to 4GHz
|(VOUT_P - VOUT_N)|, OEQ2 = GND,
OEQ1 = GND, OEQ0 = GND
OEQ2 = GND, OEQ1 = GND,
OEQ0 = GND, Figure 1
MIN TYP MAX UNITS
10
8
dB
5
6
dB
4
10
8
dB
4
6
dB
4
100
1200 mVP-P
800
1300 mVP-P
0
dB
Output Deemphasis Ratio, 3.5dB
VTX-DE-
RATIO-
3.5dB
OEQ2 = GND, OEQ1 = GND,
OEQ0 = VCC, Figure 1
3.5
dB
Output Deemphasis Ratio, 6dB
Output Deemphasis Ratio, 6dB
with Higher Amplitude
VTX-DE- OEQ2 = GND, OEQ1 = VCC,
RATIO-6dB OEQ0 = GND, Figure 1
VTX-DE-HA- OEQ2 = GND, OEQ1 = VCC,
RATIO-6dB OEQ0 = VCC, Figure 1
6
dB
6
dB
Output Deemphasis Ratio, 3.5dB
with Preshoot
VTX-DE-
PS-RATIO-
3.5dB
OEQ2 = VCC, OEQ1 = GND,
OEQ0 = GND, Figure 1
3.5
dB
Output Deemphasis Ratio, 6dB
with Preshoot
Output Deemphasis Ratio, 9dB
with Preshoot
Output Deemphasis Ratio,
9dB with Preshoot with Higher
Amplitude
VTX-DE-PS- OEQ2 = VCC, OEQ1 = GND,
RATIO-6dB OEQ0 = VCC, Figure 1
VTX-DE-PS- OEQ2 = VCC, OEQ1 = VCC,
RATIO-9dB OEQ0 = GND, Figure 1
VTX-DE-PS- _{OEQ2 = VCC, OEQ1 = VCC,}
HA-RATIO- _{OEQ0 = VCC, Figure 1}
9dB
6
dB
9
dB
9
dB
Input Equalization, 5dB
Input Equalization, 8dB
Input Equalization, 12dB
VRX-EQ-
5dB
VRX-EQ-
8dB
VRX-EQ-
12dB
INEQ1 = GND, INEQ0 = GND (Note 5)
INEQ1 = GND, INEQ0 = VCC (Note 5)
INEQ1 = VCC, INEQ0 = GND (Note 5)
5
dB
8
dB
12
dB
4  
Maxim Integrated