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PDF MAX9546 Data sheet ( Hoja de datos )
| Número de pieza | MAX9546 | |
| Descripción | (MAX9546 / MAX9547) Differential Video Interface Chipset | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX9546 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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19-3873; Rev 2; 7/07
Differential Video Interface Chipset
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 (VBAT = +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*
MAX9547ESA+ 8 SO-EP*
S8E-14
S8E-14
Driver
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
VCC
MAX9546
IN
CLAMP
OUT+
OUT-
FAULT
VCC
ZT+
MAX9547
ZT-
IN+
IOUT
IN-
VOUT
LOS
________________________________________________________________ Maxim Integrated Products 1
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.
1 page  
Differential Video Interface Chipset
Typical Operating Characteristics
(VCC = +8.5V, RL = 220Ω between OUT+ and OUT-, RL = 75Ω (MAX9547), ZZT = 75Ω, TA = +25°C, unless otherwise noted.)
GAIN vs. FREQUENCY
20
MAX9546
10
0
MAX9547
-10
-20
-30
0.001
0.01 0.1
1
FREQUENCY (MHz)
10
GAIN vs. TEMPERATURE
8
7 VIN = 1VP-P
6
5
4 MAX9546
3
2 MAX9547
1
0
-1
-2
-40
-15 -10 35
60
TEMPERATURE (°C)
85
MAX9547 IOUT CURRENT vs. TEMPERATURE
25
23
21
19
17
15
-40
-15 10 35 60
TEMPERATURE (°C)
85
MAX9547 COMMON-MODE REJECTION
RATIO vs. FREQUENCY
0
VRIPPLE = 100mVP-P
-10
-20
-30
-40
-50
-60
-70
-80
0.0001
0.001 0.01 0.1
FREQUENCY (MHz)
1
10
MAX9547 COMMON-MODE REJECTION
RATIO vs. TEMPERATURE
0
VRIPPLE = 100mVP-P
-10 fRIPPLE = 10kHz
-20
-30
-40 VCOM = 2V
-50
-60
-70
-80
-40
VCOM = 5.4V
-15 10 35 60
TEMPERATURE (°C)
85
MAX9546 INPUT CLAMP CURRENT
vs. TEMPERATURE
10
9
8
7
6
5
-40 -15 10 35 60
TEMPERATURE (°C)
85
MAX9547 DIFFERENTIAL INPUT
RESISTANCE vs. TEMPERATURE
200
180
160
140
120
100
80
60
40
20
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
MAX9546 DIFFERENTIAL OUTPUT
RESISTANCE vs. TEMPERATURE
200
180
160
140
120
100
80
60
40
20
0
-40
-15 10 35 60
TEMPERATURE (°C)
85
_______________________________________________________________________________________ 5
5 Page 
Differential Video Interface Chipset
Typical Application Circuit
7.5V TO 10V
0.1µF
GND1
4.7µF
VCC VCC
FAULT
4.7kΩ
MAX9546
RS
CIN
75Ω
0.33µF
IN
OUT+
55Ω
RS
55Ω
OUT-
AC 75Ω
GND1
GND GND
GND1
GND1
NOTE: TYPICAL APPLICATION CIRCUIT FOR 110Ω UNSHIELDED (UTP) CABLE
WITH AN OVERALL UNITY GAIN IN A 75Ω VIDEO APPLICATION.
7.5V TO 10V
0.1µF
4.7µF
GND2
ZZT
75Ω
VCC
ZT+
LOS
ZT-
MAX9547
4.7kΩ
IN+
VOUT
IOUT
IN- RL
75Ω
RT1 RT2
55Ω 55Ω
GND
GND2
CT
1µF TO 47µF
GND2
GND2
TOP VIEW
MAX9546
VCC 1
IN 2
+
FAULT 3
GND 4
8 VCC
7 OUT+
6 OUT-
5 GND
SO-EP
Pin Configurations
MAX9547
+
IN+ 1
ZT+ 2
ZT- 3
IN- 4
8 VCC
7 IOUT
6 LOS
5 GND
SO-EP
PROCESS: BICMOS
Chip Information
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet MAX9546.PDF ] | |
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