AS115 austriamicrosystems, AS115 Datasheet - Page 10

• Manufacturer Part Number: AS115
• Description: Quad Lvds Receivers
• Manufacturer: austriamicrosystems

AS1150/AS1151
Data Sheet - A p p l i c a t i o n s
9 Applications
Table 5. Function Table
Figure 17. Typical Application Circuit
Power-Supply Bypassing
To bypass V
device as possible, with the smaller valued capacitor closest to pin V
Differential Traces
Input trace characteristics can adversely affect the performance of the AS1150 and AS1151.
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Other Combinations of Enable Pin Settings
Use controlled-impedance PC board traces to match the cable characteristic impedance. The termination resistor
must also be matched to this characteristic impedance.
Eliminate reflections and ensure that noise couples as common mode by running differential traces close together.
Reduce skew by using matched trace lengths. Tight skew control is required to minimize emissions and proper
data recovery of the devices.
Route each channel’s differential signals very close to each other for optimal cancellation of their respective exter-
nal magnetic fields. Use a constant distance between the differential traces to avoid irregularities in differential
impedance.
Avoid 90° turns (use two 45° turns).
Minimize the number of vias to further prevent impedance irregularities.
EN
H
CC
LVTTL/LVC-
Data Inputs
, use high-frequency surface-mount ceramic 0.1µF and 0.001µF capacitors in parallel as close to the
MOS
Enable Pins
L or Open
ENn
Quad LVDS Driver
100Ω Shielded Twisted Cable or Microstrip PC Board Traces
AS1152
Tx
Tx
Tx
Tx
AS1150 – Open, undriven short, or undriven
Revision 1.19
AS1151 – Open or undriven short
INx+
Signals
LVDS
100Ω parallel termination
V
V
ID
ID
Don’t Care
107Ω
107Ω
107Ω
107Ω
≥ +100mV
≤ +100mV
Input
CC
.
AS1151
Rx
Rx
Rx
Rx
INx-
Data Outputs
LVTTL/LVC-
MOS
Output
OUTx
H
H
L
Z
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