7
TDP142
www.ti.com.cn
ZHCSGQ7C –SEPTEMBER 2017–REVISED MAY 2019
Copyright © 2017–2019, Texas Instruments Incorporated
6.7 AC Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DisplayPort Transmitter (OUTDP[3:0]p or OUTDP[3:0]n)
V
TX(DIFF-PP)
Transmitter dynamic differential voltage swing range. 1500 mV
PP
V
TX(RCV-DETECT)
Amount of voltage change allowed during receiver detection 600 mV
V
TX(CM-AC-PP-ACTIVE)
Tx AC common-mode voltage active
Max mismatch from Txp + Txn for both
time and amplitude
100 mV
PP
V
TX(IDLE-DIFF-AC-PP)
AC electrical idle differential peak-to-
peak output voltage
At package pins 0 10 mV
V
TX(IDLE-DIFF-DC)
DC electrical idle differential output
voltage
At package pins after low pass filter to
remove AC component
0 14 mV
R
TX(DIFF)
Differential impedance of the driver 75 120 Ω
C
AC(COUPLING)
AC coupling capacitor 75 265 nF
R
TX(CM)
Common-mode impedance of the
driver
Measured with respect to AC ground
over
0–500 mV
18 30 Ω
C
TX(PARASITIC)
TX input capacitance for return loss At package pins, at 2.5GHz 1.25 pF
R
LTX(DIFF)
Differential return loss
50 MHz – 1.25 GHz at 90 Ω -15 dB
2.5 GHz at 90 Ω -12 dB
R
LTX(CM)
Common-mode return loss 50 MHz – 2.5 GHz at 90 Ω -13 dB
I
TX(SHORT)
TX short circuit current TX± shorted to GND 67 mA
V
TX(DC-CM)
Common-mode voltage bias in the transmitter (DC) 0 0 V
AC Characteristics
Crosstalk
Differential crosstalk between TX and
RX signal pairs
at 2.5 GHz –30 dB
C
(P1dB-LF)
Low frequency 1-dB compression
point
at 100 MHz, 200 mV
PP
< V
ID
< 2000 mV
PP
1300 mV
PP
C
(P1dB-HF)
High frequency 1-dB compression
point
at 2.5 GHz, 200 mV
PP
< V
ID
< 2000 mV
PP
1300 mV
PP
f
LF
Low frequency cutoff 200 mV
PP
< V
ID
< 2000 mV
PP
20 50 kHz
TX output deterministic jitter
200 mV
PP
< V
ID
< 2000 mV
PP
, PRBS7,
5 Gbps
0.05 UIpp
200 mV
PP
< V
ID
< 2000 mV
PP
, PRBS7,
8.1 Gbps
0.08 UIpp
TX output total jitter
200 mV
PP
< V
ID
< 2000 mV
PP
, PRBS7,
5 Gbps
0.08 UIpp
200 mV
PP
< V
ID
< 2000 mV
PP
, PRBS7,
8.1 Gbps
0.135 UIpp
DisplayPort Receiver (INDP[3:0]p or INDP[3:0]n)
V
ID(PP)
Peak-to-peak input differential dynamic voltage range 2000 V
V
IC
Input common mode voltage 0 2 V
C
(AC)
AC coupling capacitance 75 200 nF
E
Q(DP)
Receiver equalization DPEQ[1:0] at 4.05 GHz 14 dB
d
R
Data rate HBR3 8.1 Gbps
R
(ti)
Input termination resistance 80 100 120 Ω
AUXp or AUXn
V
(AUXP_DC_CM)
AUX Channel DC common mode
voltage for AUXp
V
CC
= 3.3 V 0 0.4 V
V
(AUXN_DC_CM)
AUX Channel DC common mode
voltage for AUXn
V
CC
= 3.3 V 2.7 3.6 V
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