MAX7453CSA-T [MAXIM]
Consumer Circuit, BICMOS, PDSO8, 0.150 INCH, MS-012AA, SOP-8;
| 型号： | MAX7453CSA-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Consumer Circuit, BICMOS, PDSO8, 0.150 INCH, MS-012AA, SOP-8 |
| 文件： | 总5页 (文件大小：167K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-3269; Rev 0; 6/05
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
General Description
Features
The MAX7453 is a low-cost, triple-channel video recon-
struction filter for S-video and CVBS video-signal appli-
cations. This device is ideal for anti-aliasing and DAC
smoothing video applications such as set-top boxes,
DVD players, hard-disk recorders (HDRs), and personal
video recorders. This filter operates from a single +5V
supply. It is optimized for NTSC, PAL, and standard-defi-
nition TV (SDTV) video systems.
♦ Triple-Channel Filter and Buffer for CVBS and
Y/C (S-Video) Video Signals
♦ Filter Response Ideal for NTSC, PAL, and
Interlaced SDTV Signals
♦ 42dB (typ) Stopband Attenuation at 27MHz
♦ -0.3dB (typ) Passband Response
♦ <1V Blanking Level Allows DC-Coupled Output
♦ CVOUT Drives Two 150Ω Video Loads
♦ YOUT and COUT Drive One 150Ω Video Load
♦ +5V Single-Supply Voltage
Each channel consists of a lowpass filter and an output
buffer capable of driving one (YOUT, COUT) or two
(CVOUT) standard 150Ω video loads. The output buffers
can drive either an AC or a DC load such that the blank-
ing level voltage after the backmatch resistor is less than
1V. The Y and C video inputs are summed to produce
the composite video output. The MAX7453 has a maxi-
mally flat frequency response.
♦ 8-Pin SO Package
Ordering Information
The MAX7453 is available in an 8-pin SO package and is
fully specified over the commercial (0°C to +70°C) tem-
perature range.
PART
TEMP RANGE
PIN-PACKAGE
MAX7453CSA
0°C to +70°C
8 SO
Applications
Pin Configuration
Set-Top Boxes/HDRs/DVDs
Security Cameras/Digital Cameras
Game Consoles
TOP VIEW
YIN
N.C.
GND
CIN
1
2
3
4
8
7
6
5
YOUT
V
CC
MAX7453
Digital VCRs
CVOUT
COUT
Every Composite, S-Video Output for NTSC,
PAL, and SDTV
SO
Functional Diagram
V
CC
*
ENCODER
D/A
YIN
LOWPASS
FILTER
YOUT
CVOUT
COUT
+6dB
+6dB
+6dB
*
*
MAX7453
Σ
LOWPASS
FILTER
CIN
*
D/A
GND
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
ABSOLUTE MAXIMUM RATINGS
CC
All Other Pins to GND.................................-0.3V to (V
V
to GND ...........................................................................+6V
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
+ 0.3V)
CC
Maximum Current into Any Pin Except V
and GND ..... 50mA
CC
Continuous Power Dissipation (T = +70°C)
A
8-Pin SO ....................................................................522.8mW
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.
ELECTRICAL CHARACTERISTICS
(V
= +5V 5ꢀ, C = 0 to 20pF, all loads to GND for DC-couple, all loads to V
/ 2 for AC-couple, C
= C
= 0.1µF,
CIN
CC
L
CC
YIN
R
= 150Ω, R
= 150Ω, R
= 75Ω, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.)
MAX A
YOUT
COUT
CVOUT
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
-0.6
39
TYP
-0.27
42
MAX
UNITS
dB
Passband Response
Stopband Attenuation
Chroma/Luma Gain
Differential Gain
f = 100kHz to 4.2MHz, relative to 100kHz
f = 27MHz
0
A
dB
SB
f = 3.58MHz, reference to CVOUT at 336kHz
5-step modulated staircase
96
98
100
0.5
0.5
ꢀ
dG
0.15
0.15
ꢀ
Differential Phase
dθ
5-step modulated staircase
Degrees
Peak signal (2V ) to RMS noise,
P-P
f = 100Hz to 50MHz
Signal-to-Noise Ratio
SNR
67
73
dB
Line-Time Distortion
Field-Time Distortion
Clamp Settling Time
H
18µs, 100IRE bar
130 lines, 18µs, 100IRE bar
To 1ꢀ
0.3
0.5
ꢀ
ꢀ
DIST
V
DIST
300
0.8
0.8
1.6
Lines
YOUT
0.60
0.60
1.44
-3.0
0.95
0.95
1.95
+2.0
16
Output DC Clamp Level
CVOUT
V
COUT
Low-Frequency Gain Accuracy
Group-Delay Deviation
A
f = 100kHz, relative to 6dB
Deviation from 100kHz to 4.1MHz
ꢀ
V
∆t
8
2
ns
g
Low-frequency channel-to-channel matching,
f = 100kHz for YOUT and COUT
tg(MATCH)
Group-Delay Matching
ns
Channel-to-Channel Crosstalk
Input Leakage Current
X
f = 100kHz to 3.58MHz
61
dB
µA
TALK
I
10
1.2
0.9
IN
Y
INP-P
Input Dynamic Swing
V
P-P
C
INP-P
SUPPLY
Supply Voltage Range
Supply Current
V
4.75
5.25
85
V
CC
I
V
V
= +5.25V, no load
65
33
mA
dB
CC
CC
Power-Supply Rejection Ratio
PSRR
= 100mV , f = 0 to 3.5MHz
IN P-P
2
_______________________________________________________________________________________
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
Typical Operating Characteristics
(V
= +5V, T = +25°C, unless otherwise noted.)
A
CC
AMPLITUDE vs. FREQUENCY
PASSBAND AMPLITUDE vs. FREQUENCY
PHASE RESPONSE vs. FREQUENCY
10
1.0
0.5
40
0
0
-10
-20
-30
-40
-50
-60
-70
-80
0
-40
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-80
-120
-160
-200
-240
-280
NORMALIZED TO 0dB
NORMALIZED TO 0dB
1
10
100
0.1
1
10
0.1
1
10
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
MODULATED 12.5T RESPONSE
(1IRE = 7.14mV)
GROUP DELAY vs. FREQUENCY
2T RESPONSE (1IRE = 7.4mV)
MAX7453 toc05
MAX7453 toc06
90
85
80
75
70
65
60
55
50
45
40
MEASURE AT TERMINATION
YIN
500mV/div
YIN
200mV/div
YOUT
500mV/div
MEASURE AT
TERMINATION
YOUT
200mV/div
0.1
1
10
100ns/div
400ns/div
FREQUENCY (MHz)
SUPPLY CURRENT vs. TEMPERATURE
MULTIBURST RESPONSE
MAX7453 toc09
DIFFERENTIAL GAIN
70
68
66
64
62
60
58
56
54
52
50
0.3
0.2
0.1
0
YIN
500mV/div
-0.1
-0.2
-0.3
1st
2nd
3rd
4th
5th
6th
MEASURED AT TERMINATION
DIFFERENTIAL PHASE
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
YOUT
500mV/div
-40
-15
10
35
60
85
10µs/div
TEMPERATURE (°C)
1st
2nd
3rd
4th
5th
6th
_______________________________________________________________________________________
3
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
Output Clamp Level
Pin Description
FUNCTION
Luma (Y) Input
When sync pulses in the luma signal (Y) are detected,
PIN
1
NAME
YIN
the DC restore loop is activated. The function of the
loop is to set the sync tip of the video signal to the
desired DC level of 0.8V for YOUT and COUT, and to
set the average DC voltage of COUT at 1.6V.
2
N.C.
No Connection. No internal connection.
Ground
3
GND
CIN
Applications Information
4
Chroma (C) Input
5
COUT
Chroma (C) Output
Input Considerations
Use a 0.1µF ceramic capacitor to AC-couple the input
to the MAX7453. This input capacitor stores a DC level
such that the outputs are clamped to the appropriate
DC voltage level.
6
CVOUT Composite Video Output
7
V
5V Power Supply
Luma (Y) Output
CC
8
YOUT
Output Considerations
The outputs of the MAX7453 are typically connected to
a 75Ω series back-match resistor followed by the video
cable. Because of the inherent divide-by-two of this con-
figuration, the blanking level of the video cable is always
less than 1V, which complies with industry-standard
video requirements. The video buffer can also drive an
AC-coupled video load. Good video performance is
achieved with an output capacitor as low as 220µF.
Detailed Description
The primary function of the MAX7453 is to filter and
buffer the encoder DAC outputs that contain digital
video information in applications such as set-top boxes,
HDRs, DVD players, and digital VCRs. This device
reconstructs and cleans up analog video signals. The
MAX7453 consists of a lowpass filter and a +6dB-gain
output video buffer. The luma (YIN) and chroma (CIN)
video inputs are summed internally to provide the com-
posite (CVOUT) video output.
Power-Supply Bypassing and Layout
The MAX7453 operates from a single +5V supply.
These devices operate from a single +5V supply. The
filters have a nominal cutoff frequency optimized for
NTSC, PAL, and SDTV.
Bypass V
to GND with a 0.1µF capacitor. Place all
CC
external components as close to the device as possible.
The maximum power dissipation listed in the Absolute
Maximum Ratings section assumes that the PC board is
a multilayer board with ground and power planes.
Filter
Filter Response
The reconstruction filter consists of two 2nd-order
Sallen-Key stages. The Butterworth-type response fea-
tures a maximally flat passband for NTSC and PAL
bandwidths. The stopband offers 42dB (typ) of attenua-
tion at sampling frequencies of 27MHz and above (see
the Typical Operating Characteristics).
Chip Information
TRANSISTOR COUNT: 4100
Output Buffer
The YOUT and COUT buffers have a fixed +6dB gain
capable of driving one standard 150Ω video load with a
PROCESS: BiCMOS
2V
signal. The CVOUT buffer has a fixed +6dB gain,
P-P
capable of driving two 150Ω video loads. The MAX7453
can drive an AC load or drive the video load directly
without using the large output capacitor. The output
buffer of all the channels drives a DC load with an out-
put blanking level of less than 1V.
4
_______________________________________________________________________________________
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages.)
INCHES
MILLIMETERS
DIM
A
MIN
MAX
0.069
0.010
0.019
0.010
MIN
1.35
0.10
0.35
0.19
MAX
1.75
0.25
0.49
0.25
0.053
0.004
0.014
0.007
N
A1
B
C
e
0.050 BSC
1.27 BSC
E
0.150
0.228
0.016
0.157
0.244
0.050
3.80
5.80
0.40
4.00
6.20
1.27
E
H
H
L
VARIATIONS:
INCHES
1
MILLIMETERS
DIM
D
MIN
MAX
0.197
0.344
0.394
MIN
4.80
8.55
9.80
MAX
5.00
N
8
MS012
AA
TOP VIEW
0.189
0.337
0.386
D
8.75 14
10.00 16
AB
D
AC
D
C
A
B
0∞-8∞
e
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
REV.
1
21-0041
B
1
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5
© 2005 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products, Inc.
相关型号：
©2020 ICPDF网 联系我们和版权申明