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MAX7444ETA+T

P1-P3P4-P6P7-P8
General Description
The MAX7443/MAX7444 are low-cost, triple-channel
video reconstruction filters for S-video and CVBS video
signals. These devices are ideal for anti-aliasing and
DAC smoothing video applications such as set-top
boxes, DVD players, hard-disk recorders (HDRs), and
personal video recorders. These filters operate from a
single +5V supply. They are optimized for NTSC, PAL,
and standard-definition digital TV (SDTV) video systems.
Each channel consists of a lowpass filter and an
adjustable-gain output buffer capable of driving two
standard 150Ω video loads. The output buffers can drive
either an AC or a DC load such that the blanking level
voltage after the backmatch resistor is less than 1V. The
Y and C video inputs are summed to produce the com-
posite video output. The MAX7444 offers high-
frequency boost to improve picture sharpness. The
MAX7443 has a maximum flat-frequency response.
The MAX7443/MAX7444 are available in a tiny 8-pin thin
QFN and an 8-pin SO package with exposed pad, and
are fully specified over the -40°C to +85°C extended
temperature range.
Applications
Features
♦ Triple-Channel Filter and Buffer for CVBS and
Y/C (S-Video)
♦ Filter Response Ideal for NTSC, PAL, and
Interlaced SDTV Signals
♦ 41dB (typ) Stopband Attenuation at 27MHz
♦ -0.3dB (typ) Passband Response
♦ Low Blanking Level Voltage Allows DC-Coupled
Output
♦ Each Channel Drives Two 150Ω Video Loads
♦ +5V Single-Supply Voltage
♦ Tiny 8-Pin Thin QFN or 8-Pin SO Packages
MAX7443/MAX7444
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2749; Rev 1; 1/06
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.
EVALUATION KIT
AVAILABLE
PART
PIN-PACKAGE
TOP
MARK
PKG
CODE
MAX7443ETA
8 Thin QFN-EP*
AFX T833-1
MAX7443ESA 8 SO-EP* — S8E-12
MAX7444ETA
8 Thin QFN-EP*
AFY T833-1
MAX7444ESA 8 SO-EP* — S8E-12
D/A
CIN
LOWPASS
FILTER
LOWPASS
FILTER
YIN
D/A
6dB/
9.5dB/
12dB
6dB/
9.5dB/
12dB
6dB/
9.5dB/
12dB
Σ
GSET
COUT
CVOUT
YOUT
*
*
*
*
*
*
*OPTIONAL
GND
V
CC
ENCODER
MAX7443
MAX7444
Functional Diagram
Set-Top Boxes/HDR/DVD
Security Cameras/Digital
Cameras
Game Consoles
Digital VCRs
Every Composite,
S-Video Output for NTSC,
PAL, SDTV
Note: All devices specified over -40°C to +85°C temperature
range.
*EP = Exposed pad.
Selector Guide appears at end of data sheet.
MAX7443/MAX7444
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
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.
V
CC
to GND ...........................................................................+6V
All Other Pins to GND.................................-0.3V to (V
CC
+ 0.3V)
Maximum Current into Any Pin Except V
CC
and GND .....±50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin Thin QFN (derate 24.4mW/°C above +70°C) ...1951mW
8-Pin SO (derate 18.9mW/°C above +70°C)..............1509mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V ±5%, C
L
= 0 to 20pF, R
L
= 75Ω to GND for DC-couple, R
L
= 75Ω to V
CC
/2 for AC-couple, C
YIN
= C
CIN
= 0.1µF,
T
A
= T
MIN
to T
MAX
, GSET = GND (6dB) and V
CC
(9.5dB), unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
MAX7443
-0.8 -0.3 +0.1
Passband Response
f = 100kHz to 4.2MHz,
relative to 100kHz
MAX7444
-0.1 +0.6 +0.92
dB
Stopband Attenuation A
SB
f = 27MHz 39 41 dB
Boost Amplitude f = 4.2MHz, MAX7444
0.6
dB
Differential Gain dG
5-step modulated
staircase
Gain = 6dB,
9.5dB, 12dB
0.15 0.4
%
Differential Phase dθ
5-step modulated
staircase
Gain = 6dB,
9.5dB, 12dB
0.15 0.4
Degrees
Signal-to-Noise Ratio SNR
Peak signal (2V
P-P
) to
RMS noise, f = 100Hz to
50MHz
Gain = 6dB,
9.5dB, 12dB
67 73 dB
MAX7443 8 20
Group Delay Deviation ∆t
g
Deviation from 100kHz to
4.1MHz
MAX7444 12 30
ns
Line-Time Distortion H
DIST
18µs, 100 IRE bar
0.3
%
Field-Time Distortion V
DIST
130 lines, 18µs, 100 IRE bar
0.5
%
Clamp Settling Time To ±1%
430
Lines
YOUT
0.6 0.8 1.0
CVOUT
0.6 0.8 1.0
Output DC Clamp Level
COUT
1.44 1.6 1.97
V
Low-Frequency Gain Accuracy A
V
f = 100kHz, relative to 6dB
-3.5
+2 %
Group Delay Matching
tg(MATCH)
Low-frequency channel-to-channel matching,
f = 100kHz for YOUT and COUT
2ns
Channel-to-Channel Crosstalk X
TALK
f = 100kHz to 3.58MHz, gain = 6dB 61 dB
Input Leakage Current I
IN
10 µA
MAX7443/MAX7444
Triple-Channel Video Reconstruction Filter and
Buffer for Composite and Y/C Outputs
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V ±5%, C
L
= 0 to 20pF, R
L
= 75Ω to GND for DC-couple, R
L
= 75Ω to V
CC
/2 for AC-couple, C
YIN
= C
CIN
= 0.1µF,
T
A
= T
MIN
to T
MAX
, GSET = GND (6dB) and V
CC
(9.5dB), unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
Y
INP-P
GSET = GND (6dB)
1.2
Input Dynamic Swing
C
INP-P
GSET = GND (6dB)
0.9
V
P-P
SUPPLY
Supply Voltage Range V
CC
4.75 5.25
V
Supply Current I
CC
V
CC
= +5.25V, no load 88
110
mA
Power-Supply Rejection Ratio PSRR V
IN
= 100mV
P-P
, f = 0 to 3.5MHz 33 dB
Typical Operating Characteristics
(V
CC
= +5V, T
A
= +25°C, unless otherwise noted.)
-80
1 10 100
AMPLITUDE vs. FREQUENCY
MAX7443/44 toc01
FREQUENCY (MHz)
AMPLITUDE (dB)
-60
-20
-40
0
NORMALIZED TO 0dB
-2.0
0.1 1 10
PASSBAND AMPLITUDE vs. FREQUENCY
MAX7443/44 toc02
FREQUENCY (MHz)
AMPLITUDE (dB)
0.5
-0.5
2.0
NORMALIZED TO 0dB
1.5
1.0
-1.5
-1.0
0
MAX7443
MAX7444
-200
0.1 1 10
PHASE RESPONSE vs. FREQUENCY
MAX7443/44 toc03
FREQUENCY (MHz)
PHASE (DEGREES)
50
-50
200
150
100
-150
-100
0
40
0.1 1 10
GROUP DELAY vs. FREQUENCY
MAX7443/44 toc04
FREQUENCY (MHz)
GROUP DELAY (ns)
70
60
90
80
50
2T RESPONSE (1 IRE = 7.14mV)
MAX7443/44 toc05
200ns/div
Y
IN
200mV/div
Y
OUT
400mV/div
MODULATED 12.5T RESPONSE
(1 IRE = 7.14mV)
MAX7443/44 toc06
400ns/div
Y
IN
200mV/div
Y
OUT
200mV/div
P1-P3P4-P6P7-P8

MAX7444ETA+T

Mfr. #:
Buy MAX7444ETA+T
Manufacturer:
Maxim Integrated
Description:
IC FILTER RECON VID 8-TDFN
Lifecycle:
New from this manufacturer.
Delivery:
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