MAX9546(2005) View Datasheet(PDF) - Maxim Integrated
Part Name
Description
Manufacturer
MAX9546 Datasheet PDF : 12 Pages
| |||
Differential Video Interface Chipset
Pin Description (MAX9546)
PIN
NAME
FUNCTION
1, 8
VCC
Power Supply. Connect together and bypass with a 0.1µF in parallel with a 4.7µF capacitor to
GND.
2
IN
Video Input
3
FAULT
Fault Indicator. Active-low, open-drain output. FAULT = low when fault is detected at the output.
FAULT = high when no fault is detected at the output.
4, 5
GND
Ground
6
OUT-
Negative Differential Output
7
OUT+
Positive Differential Output
EP
EP
Exposed Paddle. Connect to GND.
Pin Description (MAX9547)
PIN
NAME
FUNCTION
1
IN+
Positive Differential Input
2
ZT+
Positive Transconductance Terminal
3
ZT-
Negative Transconductance Terminal
4
IN-
Negative Differential Input
5
GND
Ground
6
LOS
Loss-of-Signal Indicator. Active-low, open-drain output. LOS = low when no signal is detected at
the input. LOS = high when signal is present at the input.
7
IOUT
Current Output
8
VCC
Power Supply. Bypass with a 0.1µF capacitor in parallel with a 4.7µF capacitor to GND.
EP
EP
Exposed Paddle. Connect to GND.
Detailed Description
The MAX9546/MAX9547 differential interface chipset
converts single-ended voltages to differential voltages
for transport and then converts back to single-ended
voltages. The chipset is optimized for transporting
CVBS/FBAS analog video signals (PAL or NTSC)
through hostile automotive environments. The
MAX9546 driver includes a fault output (FAULT) that
indicates shorted transmission cables. The MAX9547
receiver loss-of-signal output (LOS) indicates an
absence of input signal.
The MAX9546/MAX9547 operate from a 7.5V to 10V sin-
gle supply. The differential interface is immune to short-
circuit conditions to an automotive battery (VBAT = 16V),
supply (VCC), or ground. These devices include ±15kV
ESD (Human Body Model) protection.
MAX9546
Driver
The MAX9546 driver converts a single-ended video
input into a differential output for transport across a
twisted pair of wires. The input is AC-coupled and the
video signal sync tip is clamped at 3.46V to set the
voltage of the input. The output common-mode voltage
is optimized to reject ground differences between the
MAX9546 and MAX9547 up to ±2V. The differential
gain is internally set to 2V/V to drive a back-terminated
output to unity gain. The maximum input resistance
should not exceed 400Ω to ensure device stability.
_______________________________________________________________________________________ 7
Share Link: 