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MAX9546ESA+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MAX9546/MAX9547
Differential Video Interface Chipset
________________________________________________________________ Maxim Integrated Products 1
19-3873; Rev 3; 10/07
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX9546/MAX9547 differential interface chipset
converts single-ended voltages to differential voltages for
transport and then converts back to single-ended volt-
ages. These devices eliminate costly, bulky, single-
ended coaxial cables with inexpensive, readily available,
differential shielded (ScTP) or unshielded (UTP) twisted
pairs. The fault detection of the MAX9546 and loss-of-sig-
nal detection of the MAX9547 allow proactive and
speedy diagnosis, such as identifying failures in the man-
ufacturing stage and troubleshooting equipment at repair
facilities. The MAX9546/MAX9547 are low-cost, conve-
nient solutions for transporting CVBS/FBAS analog video
signals (PAL or NTSC) through hostile environments.
The MAX9546 driver converts the single-ended input into
a differential output with a 6dB fixed gain to drive a back-
terminated, DC-coupled differential video output to unity
gain. This DC connection allows the detection of a short-
circuit condition at the differential outputs. The FAULT
output indicates a short-circuit condition including a short
to a high battery condition (V
BAT
= +16V) or ground.
The MAX9547 receiver converts the differential signal
from the MAX9546 into a single-ended signal. Like the
MAX9546 output, the MAX9547 input survives a short to
a high battery condition or ground. The MAX9547 receiv-
er loss-of-signal output (LOS) operates by detecting the
H-Sync and thus can support both monochrome and
color video signals. The MAX9547 gain is set with an
external impedance between ZT+ and ZT-.
The MAX9546/MAX9547 operate from a 7.5V to 10V
single supply. Both devices include ±15kV ESD Human
Body Model (HBM) protection. The MAX9546/MAX9547
are offered in a thermally enhanced 8-pin SO package
and specified over the -40°C to +85°C extended tem-
perature range.
Applications
Automotive Video
Car Navigation
In-Car Entertainment
Collision Avoidance/Rearview Cameras
Security/CCTV Video
Avionics/In-Flight Entertainment
Features
♦ Fault Detection (MAX9546)
♦ Loss-of-Signal Detection (MAX9547)
♦ Tolerate ±2V Ground-Level Shift between Source
and Load
♦ ±15kV ESD Protection (Human Body Model)
♦ ±8kV—IEC 1000-4-2 Contact Discharge
♦ ±15kV—IEC 1000-4-2 Air-Gap Discharge
♦ Preset 6dB Gain (MAX9546)
♦ Variable Receiver Gain (MAX9547)
♦ 7.5V to 10V Single-Supply Operation
Ordering Information
PART
PIN-
PACKAGE
PKG CODE
DESCRIPTION
MAX9546ESA+
8 SO-EP* S8E-14 Driver
MAX9547ESA+
8 SO-EP* S8E-14 Receiver
Note: These devices are specified for -40°C to +85°C temper-
ature range.
+Denotes a lead-free package.
*EP = Exposed paddle.
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
FAULT
OUT-
CLAMP
OUT+
V
CC
V
CC
ZT+
ZT-
IN+
IOUT
V
OUT
LOS
IN-
IN
MAX9547
MAX9546
MAX9546/MAX9547
Differential Video Interface Chipset
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: The Absolute Maximum Ratings of OUT+/OUT- for the MAX9546 and IN+/IN- for the MAX9547 are based on a single-fault
condition, i.e. only one output of MAX9546 (or both outputs together) is shorted to the battery, V
CC
or GND. The devices will
not survive a double-fault condition, i.e. OUT+ and OUT- shorted to different supplies.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer
board. For detailed information on package thermal considerations see www.maxim-ic.com/thermal-tutorial
.
(Voltages are referenced GND.)
V
CC
to GND............................................................-0.3V to +11V
IN and FAULT (MAX9546)......................... -0.3V to (V
CC
+ 0.3V)
OUT+, OUT- (MAX9546) (Note 1) .............................-2V to +16V
FAULT Short-Circuit Duration to
V
CC
or GND (MAX9546) .........................................Continuous
IN+, IN- (MAX9547) (Note 1).....................................-2V to +16V
IOUT, LOS, ZT+, ZT- (MAX9547) ...............-0.3V to (V
CC
+ 0.3V)
Differential Input Voltage (|V
IN+
- V
IN-
|) (MAX9547)...............+5V
IOUT, LOS Short-Circuit Duration to
V
CC
or GND (MAX9547) .........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SO-EP (derate 24.4mW/°C above +70°C) ......1951.2mW
θ
JC
(Note 2).....................................................................7.0°C/W
θ
JA
.................................................................................41.0°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature..................................................... +150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
Supply Voltage Range V
CC
Guaranteed by PSRR 7.5 8.5
10.0
V
Quiescent Supply Current I
CC
No load 64
112
mA
Voltage Gain A
V
V
IN
= 1.2V
P-P
(Note 4) 1.8 2 2.2 V/V
Input-Voltage Swing V
IN
Guaranteed by A
V
1.2 V
P-P
Input Clamp Voltage V
CLMP
(Note 5)
3.46
V
Input Clamp Current I
CLMP
(Note 5) 7 13 µA
Input Resistance R
IN
(Notes 5, 6)
500
kΩ
Output Common-Mode Voltage V
COM
3.0
3.25
3.4 V
Output Impedance R
OUT
0.1 Ω
OUT+ and/or OUT- to +16V 9
OUT+ and/or OUT- to + (V
CC
- 2V) 2
OUT+ and/or OUT- to +2V 4
OUT+ and/or OUT- to -2V 7
OUT+ and/or OUT- to +16V, V
CC
unconnected
6
Output Fault Current I
F(OUT)
OUT+ or OUT- to -2V, V
CC
unconnected 24
mA
Differential mode 45 62
Power-Supply Rejection Ratio PSRR
V
CC
from 7.5V to
10V (Note 7)
Common mode 46 52
dB
FAULT Output Logic Level V
OL
, I
SINK
= 1.6mA (Note 8) 0.4 V
FAULT Output Leakage Current
0.01
µA
DC ELECTRICAL CHARACTERISTICS—MAX9546
(V
CC
= +8.5V, R
L
= 220Ω between OUT+ and OUT-, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise
noted.) (Note 3)
MAX9546/MAX9547
Differential Video Interface Chipset
_______________________________________________________________________________________ 3
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Large-Signal Bandwidth V
IN
= 1V
P-P
, -3dB 18 MHz
Large-Signal Flatness V
IN
= 1V
P-P
, ±0.5dB 15 MHz
Slew Rate SR OUT+ - OUT- 70 V/µs
Settling Time (0.1%)
t
SETTLING
V
IN
= 1V
P-P
400
ns
Power-Supply Rejection Ratio PSRR f = 100kHz, 100mV
P-P
ripple 63 dB
f = 100kHz 55
Common-Mode Balance (Note 9) CMB
f = 3.58MHz 39
dB
Droop Guaranteed by input current 1 %
Differential Gain DG (Note 10)
1.37
%
Differential Phase DP (Note 10)
0.14
degrees
SNR (dB
RMS
) SNR (Note 10) -62 dB
2T Pulse to Bar Rating (Note 10)
-0.22
%KF
2T Pulse Response (Note 10)
0.30
%KF
Group Delay D/dt At 3.58MHz (Note 10)
2.20
ns
Horizontal Tilt (Notes 10, 15) 0 %
Vertical Tilt (Notes 10, 15)
6.62
%
AC ELECTRICAL CHARACTERISTICS—MAX9546
(V
CC
= +8.5V, R
L
= 220Ω across OUT+ and OUT-, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, unless otherwise noted.)
(Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Supply Voltage Range V
CC
Guaranteed by PSRR 7.5 8.5
10.0
V
Supply Current I
CC
70
110
mA
Differential Input Voltage Range
|IN+ - IN-|
V
IN
(
P-P
)
Guaranteed by CMRR (Note 11) 1.2 V
P-P
Common-Mode Input Voltage
Range
V
COM
Guaranteed by CMRR (Note 11) 1.0 5.4 V
Input Current I
IN
630µA
Input Offset Current ∆I
IN
1 4.2 µA
Input Resistance R
IN
Differential 80 kΩ
Voltage Gain A
V
V
IN
(
P-P
)
= 1.2V, defined as I
OUT
x (R
L
/ V
IN
) 0.90
1
1.15
V/V
Output Voltage V
OB
IN+ = IN- = 3.2V 1 V
Output Voltage Swing V
OUT
1.2 V
P-P
Maximum Output Current I
OUT
V
IN
= 1V, Z
ZT
= 0 21 mA
Power-Supply Rejection Ratio PSRR V
CC
from 7.5V to 10V 26 34 dB
1V ≤ V
COM
≤ 5.4V 42 54
Common-Mode Rejection Ratio CMRR
2V ≤ V
COM
≤ 4.4V 46 70
dB
DC ELECTRICAL CHARACTERISTICS—MAX9547
(V
CC
= +8.5V, GND = 0V, R
L
= 75Ω, Z
ZT
= 75Ω, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C.) (Note 3)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX9546ESA+

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Manufacturer:
Maxim Integrated
Description:
Video Amplifiers Differential Video Interface Chipset
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