MAX9111ESA MAXIM [Maxim Integrated Products], MAX9111ESA Datasheet - Page 8

• Manufacturer Part Number: MAX9111ESA
• Description: Single/Dual LVDS Line Receivers with Ultra-Low Pulse Skew in SOT23
• Manufacturer: MAXIM [Maxim Integrated Products]

Single/Dual LVDS Line Receivers with
Ultra-Low Pulse Skew in SOT23
Figure 3a. Human Body ESD Test Modules
__________ Applications Information
Bypass V
ic 0.1µF and 0.001µF capacitors in parallel, as close to
the device as possible, with the 0.001µF valued capaci-
tor the closest to the device. For additional supply
bypassing, place a 10µF tantalum or ceramic capacitor
at the point where power enters the circuit board.
Output trace characteristics affect the performance of
the MAX9111/MAX9113. Use controlled impedance
traces to match trace impedance to both transmission
medium impedance and the termination resistor.
Eliminate reflections and ensure that noise couples as
common mode by running the differential traces close
together. Reduce skew by matching the electrical
length of the traces. Excessive skew can result in a
degradation of magnetic field cancellation.
Maintain the distance between the differential traces to
avoid discontinuities in differential impedance. Avoid
90° turns and minimize the number of vias to further
prevent impedance discontinuities.
Transmission media should have a differential charac-
teristic impedance of about 100Ω. Use cables and con-
nectors that have matched impedance to minimize
impedance discontinuities.
Avoid the use of unbalanced cables such as ribbon or
simple coaxial cable. Balanced cables such as twisted
pair offer superior signal quality and tend to generate
less EMI due to canceling effects. Balanced cables
tend to pick up noise as common mode, which is
rejected by the LVDS receiver.
8
VOLTAGE
SOURCE
_______________________________________________________________________________________
HIGH-
DC
CC
CHARGE-CURRENT
LIMIT RESISTOR
with high-frequency surface-mount ceram-
R
C
100pF
1M
C s
STORAGE
CAPACITOR
R
Cables and Connectors
RESISTANCE
D
DISCHARGE
1500Ω
Differential Traces
Supply Bypassing
DEVICE
UNDER
TEST
Termination resistors should match the differential char-
acteristic impedance of the transmission line. Because
the MAX9111/MAX9113 are current steering devices,
an output voltage will not be generated without a termi-
nation resistor. Output voltage levels depend upon the
value of the termination resistor. Resistance values may
range from 75Ω to 150Ω.
Minimize the distance between the termination resistor
and receiver inputs. Use a single 1% to 2% surface-
mount resistor across the receiver inputs.
For LVDS applications, a four-layer PC board that pro-
vides separate power, ground, LVDS signals, and input
signals is recommended. Isolate the input and LVDS
signals from each other to prevent coupling. For best
results, separate the input and LVDS signal planes with
the power and ground planes.
Figure 3b. Human Body Current Waveform
AMPERES
I
P
36.8%
100%
90%
10%
0
0
t
RL
CURRENT WAVEFORM
TIME
t
DL
I r
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Board Layout
Termination