MAX9546 Maxim Integrated Products, MAX9546 Datasheet

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MAX9546

Manufacturer Part Number
MAX9546
Description
Manufacturer
Maxim Integrated Products
Datasheet

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MAX9546ESA
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Part Number:
MAX9546ESA+
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Maxim Integrated Products
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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
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.
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.
Automotive Video
Security/CCTV Video
Avionics/In-Flight Entertainment
Car Navigation
In-Car Entertainment
Collision Avoidance/Rearview Cameras
________________________________________________________________ Maxim Integrated Products
General Description
BAT
Differential Video Interface Chipset
= +16V) or ground.
Applications
♦ Fault Detection (MAX9546)
♦ Loss-of-Signal Detection (MAX9547)
♦ Tolerate ±2V Ground-Level Shift between Source
♦ ±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
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.
MAX9546ESA+
MAX9547ESA+
and Load
PART
IN
CLAMP
MAX9546
V
CC
FAULT
OUT+
OUT-
Typical Operating Circuit
PIN-
PACKAGE
8 SO-EP*
8 SO-EP*
Ordering Information
PKG CODE DESCRIPTION
S8E-14
S8E-14
ZT+
ZT-
IN+
IN-
Features
Driver
Receiver
MAX9547
V
CC
IOUT
LOS
V
OUT
1

Related parts for MAX9546

MAX9546 Summary of contents

Page 1

... BAT 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 ...

Page 2

... IN+ IN- 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 not survive a double-fault condition, i.e. OUT+ and OUT- shorted to different supplies. ...

Page 3

... Differential Video Interface Chipset AC ELECTRICAL CHARACTERISTICS—MAX9546 (V = +8.5V 220Ω across OUT+ and OUT (Note 3) PARAMETER SYMBOL Large-Signal Bandwidth Large-Signal Flatness Slew Rate Settling Time (0.1%) t Power-Supply Rejection Ratio Common-Mode Balance (Note 9) Droop Differential Gain Differential Phase SNR (dB ) RMS 2T Pulse to Bar Rating ...

Page 4

Differential Video Interface Chipset DC ELECTRICAL CHARACTERISTICS—MAX9547 (continued +8.5V, GND = 0V 75Ω PARAMETER SYMBOL LOS Logic Level LOS Leakage Current Input Fault Current AC ELECTRICAL CHARACTERISTICS—MAX9547 (V = +8.5V, GND = ...

Page 5

... Note 10: These results were measured with a MAX4144 receiver, other receivers may affect results. Note 11: Ground between MAX9546 and MAX9547 can be a ±2V difference. Note 12: A loss-of-signal is when the input video signal of the MAX9547 does not change (cross 100mV level from sync tip) for 10 video lines ...

Page 6

... A MAX9547 IOUT CURRENT vs. TEMPERATURE -40 - TEMPERATURE (°C) MAX9546 INPUT CLAMP CURRENT vs. TEMPERATURE -40 - TEMPERATURE (°C) MAX9546 DIFFERENTIAL OUTPUT RESISTANCE vs. TEMPERATURE - TEMPERATURE (°C) ...

Page 7

... DIFFERENTIAL PHASE (MAX9546 DRIVING MAX9547) 1.0 0.6 0.2 -0.2 -0.6 -1 OUTPUT RESPONSE TO NTC-7 VIDEO TEST SIGNAL (MAX9546 DRIVING MAX9547) 10µs/div _______________________________________________________________________________________ Typical Operating Characteristics (continued) = 75Ω (MAX9547 POWER-SUPPLY REJECTION RATIO vs. TEMPERATURE 100mV RIPPLE P-P - 100kHz RIPPLE -20 MAX9547 -30 ...

Page 8

... 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 (V 8 ...

Page 9

... The CMRR is usually quite large compared to the CMB; therefore, the CMB is the limiting factor. Fault Protection and Detection The MAX9546 fault protection insures the driver outputs survive a short to any voltage from -2V to +16V and are ESD-protected to ±15kV HBM. Faults are indicated by ...

Page 10

... Differential Video Interface Chipset Applications Information Differential Interface The impedances of the differential interface are made up of the two source resistors on the driver (MAX9546) shown as R and the load resistors on the receiver S (MAX9547) shown the Typical Application T Circuit. These resistors are chosen so their sum match- es the characteristic impedance (Z transmission line ...

Page 11

... Differential Video Interface Chipset 0V OFFSET TO A DEVICE OTHER THAN A MAX9546 USING CAT5, ETC. 0V OFFSET 3.2V LOW-NOISE REFERENCE Figure 3. Suggested MAX9547 Configuration When Using Other Devices ______________________________________________________________________________________ 75Ω OPTIONAL EQ NETWORK Z FOR LONG CABLE RUNS t C3 22µF R3 10kΩ R4 110Ω R6 10kΩ C4 22µF +3.2 V 10µ ...

Page 12

... Differential Video Interface Chipset 0V OFFSET TO A DEVICE OTHER THAN A MAX9546 USING CAT5, ETC. 0V OFFSET 3.2V LOW-NOISE REFERENCE Figure 4. Alternate MAX9547 Configuration for Use with Other Devices 12 ______________________________________________________________________________________ 75Ω OPTIONAL EQ NETWORK Z FOR LONG CABLE RUNS 470µF R3 51Ω R805 R5 51Ω ...

Page 13

... ESD of ±15kV without damage. The ESD structures withstand high ESD in all states: normal operation and powered down. After an ESD event, the MAX9546/MAX9547 keep working without latchup. ESD protection can be tested in various ways; the driver out- puts and receiver inputs of this product family are char- acterized for protection to ± ...

Page 14

Differential Video Interface Chipset The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifi- cally refer to integrated circuits (Figure 7). The major difference between tests done using the Human Body Model and IEC ...

Page 15

... GND1 V CC MAX9546 C IN 0.33µF 75Ω IN 75Ω AC GND GND1 GND1 GND1 NOTE: TYPICAL APPLICATION CIRCUIT FOR 110Ω UNSHIELDED (UTP) CABLE WITH AN OVERALL UNITY GAIN IN A 75Ω VIDEO APPLICATION. TOP VIEW MAX9546 + FAULT 3 GND 4 SO-EP ______________________________________________________________________________________ V CC 4.7kΩ FAULT R S 55Ω ...

Page 16

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information PACKAGE OUTLINE 8L SOIC, .150" ...

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