MAX9546ESA+ Maxim Integrated Products, MAX9546ESA+ Datasheet - Page 10

• Manufacturer Part Number: MAX9546ESA+
• Description: IC VIDEO INTERFACE DIFF 8-SOIC
• Manufacturer: Maxim Integrated Products

Specifications of MAX9546ESA+

• Applications: Driver
• Output Type: Differential
• Number Of Circuits: 1
• -3db Bandwidth: 18MHz
• Slew Rate: 70 V/µs
• Current - Supply: 64mA
• Voltage - Supply, Single/dual (±): 7.5 V ~ 10 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Differential Video Interface Chipset
The impedances of the differential interface are made
up of the two source resistors on the driver (MAX9546)
shown as R
(MAX9547) shown as R
Circuit. These resistors are chosen so their sum match-
es the characteristic impedance (Z
transmission line. For example, a Category 5 cable has
a characteristic impedance of 110Ω, so the sum of the
two R
the line. To balance the signals they must be equal, so
R
The MAX9546/MAX9547 are used with other transmit-
ters and receivers; either other MAXIM devices or other
Figure 2. Suggested MAX9546 Configuration for Use with Other Devices
10
S
and R
______________________________________________________________________________________
S
or R
T
are 55Ω each.
R4
75Ω
R1
3.92kΩ
D1
T
S
resistors must be 110Ω to correctly drive
and the load resistors on the receiver
Applications Information
0.33µF
4.7µF
C4
Using Other Transmitters
T
in the Typical Application
Differential Interface
3
2
0
0.1µF
IN
FAULT
) of the differential
and Receivers
1
MAX9546
4
GND
V
CC
U1
V
DD
8
5
V
GND
CC
OUT+
OUT-
7
6
brands entirely. The overall performance of the
MAX9546/MAX9547 is dependent on the choice of the
receiver or transmitter, respectively.
Figure 2 illustrates one possible topology for the
MAX9546 when using other devices with different offset
requirements. Figures 3 and 4 illustrate two possible
topologies for the MAX9547 when using other devices
with unknown or different offset requirements. The cir-
cuit shown in Figure 3 has a smaller PCB footprint at
the expense of requiring higher DC offset currents from
the source device. Figure 4 requires no DC offset cur-
rents although it has a larger PCB footprint.
When using the MAX9546 with AC-coupling capacitors,
the FAULT signal will continue to function but only with
respect to a DC short condition. The LOS signal from
the MAX9547 is unaffected by coupling capacitors.
55Ω
55Ω
R2
R3
+3.2 V
+3.2 V
470µF
470µF
DC
DC
C3
C5
OFFSET
OFFSET
0V OFFSET
TO A DEVICE
OTHER THAN A
MAX9547 USING
CAT5, ETC.