Datasheet

_______________________________________________________________________________________ 5
MAX3815A
TMDS Digital Video Equalizer for
HDMI/DVI Cables
Typical Operating Characteristics (continued)
(Typical values are at V
CC
= +3.3V, T
A
= +25°C, data pattern = 2
7
- 1 PRBS + 20 ones + 2
7
- 1 PRBS (inverted) + 20 zeros, equalizer
in automatic mode, cable launch amplitude 1V
P-P
differential, unless otherwise noted.)
TOTAL JITTER vs. CABLE LENGTH (CARLISLE
INTERCONNECT TECHNOLOGIES TWIN-AX 28 AWG)
MAX3815A toc08
CABLE LENGTH (m)
DETERMINISTIC JITTER (UI
P-P
)
302010
0.1
0.2
0.3
0.4
0.5
0.6
0
0 40
2.25Gbps
NO EQ
WITH MAX3815A EQ
1.485Mbps
742.5Mbps
TOTAL JITTER vs. SIGNAL AMPLITUDE INPUT
TO CABLE (DATA RATE 2.25Gbps)
MAX3815A toc09
DIFFERENTIAL AMPLITUDE (V
P-P
)
TOTAL JITTER (ps
P-P
)
1.41.20.6 0.8 1.0
60
70
80
90
100
110
120
130
50
0.4 1.6
50m OF DVIGear SHR HDMI CABLE
WITH 35dB LOSS AT 1.11GHz
EQCONTROL VOLTAGE (RELATIVE TO V
CC
)
vs. CABLE LENGTH (MANUAL EQ CONTROL)
CABLE LENGTH (m)
EQCONTROL VOLTAGE (V)
2010
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
-0.8
0 30
CABLE IS CARLISLE INTERCONNECT
TECHNOLOGIES TWIN-AX 28 AWG WITH
APPROXIMATELY 1.35dB OF LOSS
PER METER AT 1.11GHz
MAX3815A toc10
RESIDUAL JITTER (ps
P-P
)
0
20
40
60
80
100
120
140
160
180
200
EQCONTROL VOLTAGE
RESIDUAL JITTER
AT 2.25Gbps
LOSS-OF-CLOCK ASSERT THRESHOLD
vs. CABLE LENGTH
MAX3815A toc11
CABLE LENGTH (m)
DIFFERENTIAL CLOCK AMPLITUDE (mV
P-P
)
302418126
50
100
150
200
250
300
350
0
0 36
CLOCK AMPLITUDE IS AT INPUT OF CABLE
CABLE IS CARLISLE INTERCONNECT
TECHNOLOGIES TWIN-AX, 28 AWG
225MHz CLOCK
FREQUENCY
25MHz CLOCK
FREQUENCY
EQUALIZER OUTPUT EYE AFTER 50m OF 22 AWG
HDMI CABLE (DATA RATE = 2.25Gbps)
MAX3815A toc12
100ps/div
200mV/div
DVIGear SHR HDMI CABLE