MAX4079 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Complete Audio/Video Backend Solution

19-3780; Rev 1; 3/09
EVAALVUAAILTAIOBNLEKIT
Complete Audio/Video
Backend Solution
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
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
+6dB
FILTER
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.