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MAX4079CWG+T

P1-P3P4-P6P7-P9P10-P12P13-P15
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 2.6V
RMS
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
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
MAX4079
Complete Audio/Video
Backend Solution
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
19-3780; Rev 1; 3/09
EVALUATION KIT
AVAILABLE
PART TEMP RANGE PIN-PACKAGE
MAX4079CUG+ 0°C to +70°C 24 TSSOP
+
Denotes lead(Pb)-free package.
Functional Diagram
LP
FILTER
CLAMP
BIAS
NETWORK
CLAMP
RINP
RINN
LINP
LINN
CIN
CVBSIN
YIN
COUT
CVBSOUT1
CVBSOUT2
ROUT1
ROUT2
MONO
LOUT1
LOUT2
GVID
GAUD
VVID
AUDV
REXT
CBYPASS
+3dB
+6dB
+6dB
+6dB
+6dB
+6dB
+6dB
+6dB
+6dB
YOUT
LP
FILTER
LP
FILTER
MAX4079
Pin Configuration appears at end of data sheet.
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.
MAX4079
Complete Audio/Video
Backend Solution
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.
GVID to GAUD.......................................................-0.1V to +0.1V
VVID to GVID ............................................................-0.3V to +6V
AUDV to GAUD ......................................................-0.3V to +14V
LINP, LINN, RINP, RINN, CBYPASS to GAUD .........-0.3V to +6V
LOUT1, LOUT2, ROUT1, ROUT2,
MONO to GAUD ......-0.3V to lower of (+9V and AUDV + 0.3V)
YIN, CIN, CVBSIN, REXT to GVID.............-0.3V to (VVID + 0.3V)
YOUT, COUT, CVBSOUT1, CVBSOUT2 to
GVID.......................................................-0.3V to (VVID + 0.3V)
Video Output Short-Circuit Duration to GVID or
VVID ........................................................................Continuous
Audio Output Short-Circuit Duration to GAUD or
AUDV.......................................................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
24-Pin TSSOP (derate 12.2mW/°C above +70°C) .....975.6mW
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
DC ELECTRICAL CHARACTERISTICS
(V
VVID
= +5V, V
AUDV
= +12V, V
GVID
= V
GAUD
= 0V, R
LOAD_VID
= 150Ω to GVID, R
REXT
= 10kΩ ±1%, C
CBYPASS
= 1µF, T
A
= 0°C to
+70°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SUPPLIES
Audio Supply Voltage Range AUDV 8.5 12.6 V
Video Supply Voltage Range VVID 4.75 5.0 5.25 V
Video Quiescent Supply Current I
CCV
V
VVID
= 5.25V, no load, all video inputs
AC-coupled to ground
60 100 mA
Audio Quiescent Supply Current I
CCA
V
AUDV
= 12.6V, no load, audio inputs
biased at 2.5V
815mA
Thermal Shutdown T
SD
Rising die temperature +150 °C
Thermal-Shutdown Hysteresis T
SD
,
HYS
25 °C
VIDEO
Voltage Gain A
V,VID
V
IN
= 1V
P-P
, all video inputs, no load 5.8 6 6.2 dB
Gain Matching ΔA
V
,
VID
V
IN
= 1V
P-P
, all video inputs, no load -0.4 +0.4 dB
YIN, CVBSIN 0 1.2
Input Voltage Swing V
IN,VID
CIN 0 0.9
V
P-P
Clamp Voltage V
CLMP
CVBSOUT_ and YOUT, no signal, no load 1.0 V
Chroma Bias V
BIAS
COUT, no signal, no load 2.1 V
Droop D (Note 2) 2 %
REXT
Reference Voltage V
REXT
0.85 1.00 1.15 V
CVBSIN or YIN 2.3 MΩ
Input Resistance R
IN,VID
CIN 10 kΩ
Input Clamping Current I
CLMP
CVBSIN or YIN input, V
IN
= 3.5V 1 2.5 4 µA
CVBSOUT_, YOUT 2.4
Output Voltage Swing V
OUT
,
VID
COUT 1.8
V
P-P
Short-Circuit Current I
SC,VID
Video output shorted to VVID or GVID 50 mA
YOUT/COUT 48
Power-Supply Rejection Ratio PSRR
VID
4.75V ≤ V
VVID
≤
5.25V
CVBSOUT_ 48
dB
MAX4079
Complete Audio/Video
Backend Solution
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS (continued)
(V
VVID
= +5V, V
AUDV
= +12V, V
GVID
= V
GAUD
= 0V, R
LOAD_VID
= 150Ω to GVID, R
REXT
= 10kΩ ±1%, C
CBYPASS
= 1µF, T
A
= 0°C to
+70°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
AUDIO
Voltage Gain A
V,AUD
1.414V
P-P
differential input 5.8 6 6.2 dB
Mono Voltage Gain A
V
,
MONO
1.414V
P-P
differential input, L
IN
= R
IN
2.8 3 3.2 dB
Gain Matching Between
Channels
ΔA
V
,
AUD
1.414V
P-P
differential input -0.4 +0.4 dB
Input Voltage Range V
IN
,
AUD
Inferred from CMRR test 0.3 5.2 V
Differential Input Voltage Range V
IN
,
AUD DIF
Inferred from output voltage swing -1.85 +1.85 V
Input Current I
IN,AUD
2µA
Output Voltage Swing V
OUT
,
AUD
Input overdriven, 10kΩ load to 4.15V 7.4 V
P-P
Short-Circuit Current I
SC
,
AUD
15 mA
Power-Supply Rejection Ratio PSRR
AUD
8.5V ≤ V
AUDV
≤ 12.6V 70 dB
Common-Mode Rejection Ratio CMRR
AUD
0.3V ≤ V
CM
≤ 5.2V 50 60 dB
AC ELECTRICAL CHARACTERISTICS
(V
VVID
= +5V, V
AUDV
= +12V, V
GVID
= V
GAUD
= 0V, R
IN_VIDEO
= 75Ω to GVID, C
IN_VIDEO
= 0.1µF, R
LOAD_VID
= 150Ω to GVID,
C
OUT
_
AUDIO
= 10µF, R
LOAD_AUD
= 10kΩ ±1% to GAUD, R
REXT
= 10kΩ, C
CBYPASS
= 1µF, T
A
= 0°C to +70°C, unless otherwise
noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VIDEO
f = 4MHz -0.5 +0.5
f = 7MHz 3
Filter Attenuation A
VIDEO
CVBSOUT1 = CVBSOUT2 =
YOUT = COUT = 2V
P-P
;
R
L
= 150Ω to ground,
attenuation is referred to
100kHz
f = 27MHz 40 50
dB
Slew Rate SR V
OUT
= 2V
P-P
30 V/µs
Differential Gain DG
CVBSOUT_, YOUT, COUT, 5-step
modulated staircase
0.5 %
Differential Phase DP
CVBSOUT_, YOUT, COUT, 5-step
modulated staircase
0.9 degrees
YOUT/COUT 48
Power-Supply Rejection Ratio PSRR
VID
f = 100kHz, 0.5V
P-P
CVBSOUT_ 44
dB
Peak Signal to RMS Noise SNR
VID
CVBSOUT_, YOUT, COUT, V
IN
= 1V
P-P
65 dB
Group Delay Deviation GD
CVBSOUT_, YOUT, COUT, f
IN
= 0.1MHz to
4.5MHz
25 ns
Output Impedance Z
OUT,VID
f = 3.58MHz 0.5 Ω
Capacitive Load C
L,VID
No sustained oscillations 35 pF
Video Crosstalk X
TALK,VID
f = 3.58MHz, 1V
P-P
input, between any two
active inputs
-63
Audio/Video Crosstalk X
TALK
,
VD/AD
f = 15kHz, 1V
P-P
input, between any two
active audio or video inputs
-76
dB
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX4079CWG+T

Mfr. #:
Buy MAX4079CWG+T
Manufacturer:
Maxim Integrated
Description:
IC AUDIO/VID BACKEND SOL 24SOIC
Lifecycle:
New from this manufacturer.
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