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PDF MAX4079 Data sheet ( Hoja de datos )
| Número de pieza | MAX4079 | |
| Descripción | Complete Audio/Video Backend Solution | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX4079 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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19-3780; Rev 1; 3/09
EVAALVUAAILTAIOBNLEKIT
Complete Audio/Video
Backend Solution
www.datasheet4u.com
General Description
The MAX4079 filters and buffers video (NTSC/PAL/DVB)
and stereo audio signals from the MPEG decoder of a
cable/satellite receiver, VCR/DVD player, or a TV to an
external load. The MAX4079 has luma-chroma (Y-C)
and composite (CVBS) video inputs with one Y-C and
two CVBS outputs. All video inputs are AC-coupled with
internal DC biasing on the chroma input and active
clamps for the luma and composite.
The MAX4079 video reconstruction filters have a 6MHz
cutoff frequency and 50dB attenuation at 27MHz. The
filters are matched with flat group delay for standard-
definition video. The video gain is fixed at +6dB to drive
a 75Ω back-terminated load (150Ω) to unity gain. The
video outputs can be either DC- or AC-coupled and are
powered by a single +5V supply.
The MAX4079 audio amplifiers have differential inputs
for optimum performance, but can be used with single-
ended sources with external biasing. The audio chan-
nels have a fixed gain of +6dB and deliver 2.6VRMS
output with a differential input of ±1.85V. The audio
amplifiers operate from a +9V to +12V single supply
and feature an internal bias generator. An on-chip
mixer also provides a mono output, with +3dB gain,
derived from the left and right audio channels.
The MAX4079 is available in 24-pin TSSOP package,
and is fully specified over the 0°C to +70°C commercial
temperature range. The MAX4079 Evaluation Kit is
available to help speed designs.
Applications
Satellite Receivers
Cable Receivers
Home Theater Systems
DVD Players
AV Receivers
Televisions
Pin Configuration appears at end of data sheet.
Features
♦ Integrated Video Reconstruction Filters—6MHz
Lowpass Filter Supports NTSC, PAL, or DVB per
ITU-601
♦ Integrated Video and Audio Amplifiers
♦ Integrated Video Input Clamps and Biasing
♦ Mono Audio and CVBS Output to Drive External
Modulator
♦ +5V (Video) and +9V to +12V (Audio) Single-
Supply Operation
♦ Differential/Single-Ended Audio Inputs
♦ 24-Pin TSSOP Package
Ordering Information
PART
TEMP RANGE
MAX4079CUG+
0°C to +70°C
+Denotes lead(Pb)-free package.
PIN-PACKAGE
24 TSSOP
YIN
CIN
CVBSIN
RINP
RINN
LINP
LINN
Functional Diagram
AUDV
VVID
REXT
CLAMP
LP
FILTER
+6dB
YOUT
BIAS
NETWORK
CLAMP
LP
FILTER
LP
FILTER
+6dB
+6dB
+6dB
COUT
CVBSOUT1
CVBSOUT2
+6dB ROUT1
+6dB ROUT2
+3dB MONO
MAX4079
+6dB LOUT1
+6dB LOUT2
GAUD
CBYPASS
GVID
________________________________________________________________ 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  
Complete Audio/Video
Backend Solution
www.datasheet4u.com
Typical Operating Characteristics (continued)
(VVVID = +5V, VAUDV = +12V, VGVID = VGAUD = 0V, RIN_VIDEO = 75Ω to GVID, CIN_VIDEO = 0.1µF, RLOAD_VID = 150Ω to GVID,
COUT_AUDIO = 10µF, RLOAD_AUD = 10kΩ to GAUD, RREXT = 10kΩ, CBYPASS = 1µF, TA = +25°C, unless otherwise noted.)
VIDEO CROSSTALK (CVBSOUT_ TO YIN)
-40
VIN = 1VP-P
-50
VIDEO CROSSTALK (CVBSOUT_ TO CIN)
-40
VIN = 1VP-P
-50
VIDEO CROSSTALK (COUT TO CVBSIN)
-40
VIN = 1VP-P
-50
-60 -60 -60
-70 -70 -70
-80 -80 -80
-90 -90 -90
-100 -100 -100
-110 -110 -110
-120
0.1
1 10
FREQUENCY (MHz)
-120
100 0.1
1 10
FREQUENCY (MHz)
-120
100 0.1
1 10
FREQUENCY (MHz)
100
VIDEO CROSSTALK (COUT TO YIN)
-40
VIN = 1VP-P
-50
-60
-70
-80
-90
-100
-110
-120
0.1
1 10
FREQUENCY (MHz)
100
100
90
80
70
60
50
40
30
20
10
0
0.1
CVBSOUT_ GROUP DELAY
1
FREQUENCY (MHz)
10
VIDEO CROSSTALK (YOUT TO CVBSIN)
-40
VIN = 1VP-P
-50
-60
-70
-80
-90
-100
-110
-120
0.1
1 10
FREQUENCY (MHz)
100
100
90
80
70
60
50
40
30
20
10
0
0.1
CHROMA GROUP DELAY
1
FREQUENCY (MHz)
10
VIDEO CROSSTALK (YOUT TO CIN)
-40
VIN = 1VP-P
-50
-60
-70
-80
-90
-100
-110
-120
0.1
1 10
FREQUENCY (MHz)
100
100
90
80
70
60
50
40
30
20
10
0
0.1
YOUT GROUP DELAY
1
FREQUENCY (MHz)
10
_______________________________________________________________________________________ 5
5 Page 
www.datasheet4u.com
Complete Audio/Video
Backend Solution
Typical Operating Circuit
+5V VIDEO SUPPLY
4.7μF
0.1μF 0.01μF
YIN
CIN
CVBSIN
0.1μF
75Ω
0.1μF
75Ω
0.1μF
75Ω
RINP
RINN
LINP
LINN
0.1μF
10kΩ
VVID
VVID
GVID
GVID
YIN
CIN
CVBSIN
RINP
RINN
LINP
LINN
REXT
+12V AUDIO SUPPLY
AUDV
GAUD
0.1μF 1μF
47μF
*OPTIONAL CAPACITORS
(TYPICAL VALUES SHOWN)
75Ω 330μF
YOUT
MAX4079
75Ω 330μF
COUT
75Ω 330μF
CVBSOUT1
75Ω 330μF
CVBSOUT2
Z0 = 75Ω
Z0 = 75Ω
Z0 = 75Ω
Z0 = 75Ω
75Ω
75Ω
75Ω
ROUT1
ROUT2
10μF
10μF
10kΩ
10kΩ
75Ω
MONO
LOUT1
LOUT2
CBYPASS
10μF
10μF
10kΩ
10μF
10kΩ
10kΩ
1μF
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MAX4079.PDF ] | |
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