DS90LV018A
Applications Information
(Continued)
CABLES AND CONNECTORS, GENERAL COMMENTS
When choosing cable and connectors for LVDS it is impor-
tant to remember:
Use controlled impedance media. The cables and connec-
tors you use should have a matched differential impedance
of about 100Ω. They should not introduce major impedance
discontinuities.
Balanced cables (e.g. twisted pair) are usually better than
unbalanced cables (ribbon cable, simple coax) for noise
reduction and signal quality. Balanced cables tend to gener-
ate less EMI due to field canceling effects and also tend to
pick up electromagnetic radiation a common-mode (not dif-
ferential mode) noise which is rejected by the receiver.
For cable distances
<
0.5M, most cables can be made to
work effectively. For distances 0.5M
≤
d
≤
10M, CAT 3
(category 3) twisted pair cable works well, is readily available
and relatively inexpensive.
Pin Descriptions
Pin No.
1
2
7
8
5
3, 4, 6
Name
R
IN
-
R
IN
+
V
CC
GND
NC
Description
Inverting receiver input pin
Non-inverting receiver input pin
Power supply pin, +3.3V
±
0.3V
Ground pin
No connection
R
OUT
Receiver output pin
Ordering Information
Operating
Temperature
−40˚C to +85˚C
Package Type/
Number
SOP/M08A
DS90LV018ATM
Order Number
Typical Performance Characteristics
Output High Voltage vs
Power Supply Voltage
Output Low Voltage vs
Power Supply Voltage
10007807
10007808
5
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