Datasheet

MAX3845
DVI/HDMI 2:4 TMDS Fanout Switch and
Cable Driver
4 _______________________________________________________________________________________
Typical Operating Characteristics
(Typical values are at V
CC
= +3.3V, T
A
= +25°C, data pattern = 2
10
- 1 PRBS + 20 ones + 2
10
- 1 PRBS (inverted) + 20 zeros, unless
otherwise noted.)
SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
MAX3845 toc01
AMBIENT TEMPERATURE (°C)
I
CC
(mA)
80655 20 35 50
360
380
400
420
440
460
480
500
340
-10
OUT_LEVEL = LOW,
ALL INPUTS/OUTPUTS ACTIVE,
PREEMPHASIS SAME ON ALL
OUTPUT CHANNELS
0dB PREEMPHASIS
3dB PREEMPHASIS
6dB PREEMPHASIS
SUPPLY CURRENT
vs. AMBIENT TEMPERATURE
MAX3845 toc02
AMBIENT TEMPERATURE (°C)
I
CC
(mA)
80655 20 35 50
360
380
400
420
440
460
480
500
340
-10
OUT_LEVEL = HIGH,
ALL INPUTS/OUTPUTS ACTIVE,
PREEMPHASIS SAME ON ALL
OUTPUT CHANNELS
0dB PREEMPHASIS
3dB PREEMPHASIS
6dB PREEMPHASIS
OUTPUT EYE DIAGRAM AT 1.65Gbps
SHORT LOW-LOSS SMA CABLE
MAX3845 toc03
100ps/div
150mV/div
0dB PREEMPHASIS
200Ω BACK TERMINATION
OUTPUT EYE DIAGRAM AT 2.25Gbps
SHORT LOW-LOSS SMA CABLE
MAX3845 toc04
80ps/div
150mV/div
0dB PREEMPHASIS
200Ω BACK TERMINATION
OUTPUT EYE DIAGRAM AT 1.65Gbps
6dB LOSS, 24AWG, 25ft TWIN-AX CABLE
MAX3845 toc05
100ps/div
150mV/div
6dB PREEMPHASIS
200Ω BACK TERMINATION
OUTPUT EYE DIAGRAM AT 2.25Gbps
6dB LOSS, 24AWG, 25ft TWIN-AX CABLE
MAX3845 toc06
80ps/div
150mV/div
6dB PREEMPHASIS
200Ω BACK TERMINATION
OUTPUT EYE DIAGRAM AT 1.65Gbps
THROUGH 2m DVI TO HDMI CABLE
MAX3845 toc07
100ps/div
150mV/div
6dB PREEMPHASIS
200Ω BACK TERMINATION
JITTER vs. INPUT-SIDE CABLE LOSS
AT 825 MHz
MAX3845 toc08
CABLE LOSS (dB)
JITTER (ps
P-P
)
642
20
40
60
80
100
120
140
160
0
08
DATA RATE = 1.65Gbps
200Ω BACK TERMINATION
JITTER vs. OUTPUT-SIDE CABLE LOSS
AT 825 MHz
MAX3845 toc09
CABLE LOSS (dB)
JITTER (ps
P-P
)
642
20
40
60
80
100
120
0
08
0dB PREEMPHASIS
3dB PREEMPHASIS
6dB PREEMPHASIS
DATA RATE = 1.65Gbps
200Ω BACK TERMINATION