max9508atet Maxim Integrated Products, Inc., max9508atet Datasheet

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max9508atet

Manufacturer Part Number
max9508atet
Description
Max9508 Video Filter Amplifier With Smartsleep And Bidirectional Video Support
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.MAX9508ATET.pdf (25 pages)
The MAX9508 video filter amplifier with SmartSleep and
bidirectional video support is ideal for set-top boxes
(STBs), portable DVD players, and portable media
players (PMPs). The inputs can be directly connected
to the digital-to-analog converter (DAC) outputs. The
reconstruction filter removes high-frequency signals
above 6.75MHz. The amplifiers have 6dB of gain, and
the outputs can be DC-coupled to a load of 75Ω,
which is equivalent to two video loads, or it can be
AC-coupled to a load of 150Ω.
The SmartSleep circuitry intelligently reduces power
consumption based on the presence of the input signal
and the output loads. When the MAX9508 does not
detect the presence of sync on the input video signal,
the supply current is reduced to less than 7µA. The
device only enables a video amplifier when there is an
active video input signal and an attached load. The
video amplifier remains on while a load is connected. If
the load is disconnected, the video amplifier is turned off.
The MAX9508 contains three reconstruction filters, four
video amplifiers, and a pulldown switch at one of the
two CVBS outputs. The MAX9508 has the ability to con-
trol the bidirectional video signals at the CVBS video
connections without the need for separate switches or
relays. This feature is particularly useful for portable
DVD players, which often use the same connector to
drive a composite video output and to accept an exter-
nal video signal to display on the LCD panel.
The MAX9508 operates from a 2.7V to 3.6V single supply
and is offered in a small 16-pin TQFN (3mm x 3mm)
package. The device is specified over the -40°C to
+125°C automotive temperature range.
19-0531; Rev 1; 8/06
Pin Configurations appear at end of data sheet.
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.
Portable DVD Players
Set-Top Boxes (STBs)
Portable Set-Top Boxes/
Personal Video Recorders (PVRs)
Portable Media Players (PMPs)
Portable Applications
________________________________________________________________ Maxim Integrated Products
SmartSleep and Bidirectional Video Support
General Description
Applications
CVBS/S-Video Filter Amplifier with
o SmartSleep Feature Detects Input Signal and
o Triple Standard-Definition Video Reconstruction
o Luma, Chroma, and Composite Inputs
o Luma, Chroma, and Two Composite Outputs
o Integrated Support for a Bidirectional Composite
o Supports Two Video Loads at Each Output
o 2.7V to 3.6V Single-Supply Operation
Note: All devices are specified over the -40°C to +125°C operat-
ing temperature range.
+ Denotes lead-free package.
* Future product—contact factory for availability.
** EP = Exposed pad.
SMARTSLEEP
MAX9508ATE+
MAX9508AEE+* 16 QSOP
Block Diagrams continued at end of data sheet.
EXTCVBSIN
Output Load Status to Reduce Power
Consumption
Filters with 6.75MHz Passband
Video Signal
(DC-Coupled)
INT/EXT
CVBSIN
SHDN
PART
CIN
YIN
CLAMP
BUFFER
BUFFER
ACTIVE VIDEO
16 TQFN-EP**
(3mm x 3mm)
PIN-PACKAGE PKG CODE
CONTROL
BUFFER
DETECT
LOGIC
Ordering Information
LPF
LPF
LPF
MAX9508
Block Diagrams
T1633-4
E16-4
6dB
6dB
6dB
6dB
LOAD SENSE
LOAD SENSE
LOAD SENSE
LOAD SENSE
Features
TOP MARK
AEM
YOUT
COUT
CVBSOUT1
CVBSOUT2
—
1

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max9508atet Summary of contents

Page 1

Rev 1; 8/06 SmartSleep and Bidirectional Video Support General Description The MAX9508 video filter amplifier with SmartSleep and bidirectional video support is ideal for set-top boxes (STBs), portable DVD players, and portable media players (PMPs). The inputs can be ...

Page 2

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support ABSOLUTE MAXIMUM RATINGS (Voltages with respect to GND .......................................................................... -0.3V to +4V SMARTSLEEP, SHDN, INT/EXT CIN, YIN, CVBSIN, EXTCVBSIN ..........................-0.3V to +4V Duration of COUT, YOUT, CVBSOUT1, CVBSOUT2 Short ...

Page 3

SmartSleep and Bidirectional Video Support ELECTRICAL CHARACTERISTICS (continued 3.3V SHDN DD SMARTSLEEP ues are +25°C.) (Note 1) A PARAMETER SYMBOL Sync-Tip Clamp Level Inp ...

Page 4

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support ELECTRICAL CHARACTERISTICS (continued 3.3V SHDN DD SMARTSLEEP ues are +25°C.) (Note 1) A PARAMETER SYMBOL Power-Supply Rejection Ratio Output Pulldown Resistance ...

Page 5

SmartSleep and Bidirectional Video Support AC ELECTRICAL CHARACTERISTICS (continued 3.3V SHDN DD SMARTSLEEP values are +25°C.) (Note 1) A PARAMETER SYMBOL Nonlinearity 5-step staircase Interchannel Timing Difference in time between ...

Page 6

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support ( +3.3V SHDN DD SMARTSLEEP SMALL-SIGNAL GAIN vs. FREQUENCY 100mV OUT P-P NORMALIZED TO 1MHz 10 0 -10 -20 -30 -40 -50 ...

Page 7

SmartSleep and Bidirectional Video Support ( +3.3V SHDN DD SMARTSLEEP DIFFERENTIAL GAIN AND PHASE 0.3 0.2 0.1 0 -0.1 -0.2 -0 0.8 0.4 0 -0.4 -0.8 1 ...

Page 8

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support ( +3.3V SHDN DD SMARTSLEEP PULLDOWN RESISTANCE DISTRIBUTION 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 PULLDOWN RESISTANCE (Ω) FREQUENCY RESPONSE AT ...

Page 9

SmartSleep and Bidirectional Video Support PIN NAME TQFN QSOP Power Supply. Bypass YIN Luma Video Input. Directly connect this input to the video DAC output GND Ground ...

Page 10

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support DVD CHIP CIN CURRENT DAC YIN CURRENT DAC INT/EXT SMARTSLEEP MICROCONTROLLER +3.3V SHDN CVBSIN CURRENT DAC EXTCVBSIN 0.1μF Figure 1. Typical Application Circuit for Portable DVD Player Detailed Description In the ...

Page 11

SmartSleep and Bidirectional Video Support outputs. If the SmartSleep feature is not activated and the part is not in shutdown, the filters and output ampli- fiers completely turn on, regardless of whether there is a video signal at the CVBSIN ...

Page 12

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support The active video detect circuit slices the CVBSIN signal at 4.7% of the power supply (155mV for a 3.3V supply). If the transitions occur at a rate of 14.3kHz or higher, ...

Page 13

SmartSleep and Bidirectional Video Support Full-Operation Mode If a load is connected to an output, the corresponding filter and amplifier turn on and remain on until the out- put load is disconnected. In full-operation mode, SmartSleep intelligently reduces the supply ...

Page 14

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support VIDEO ENCODER CURRENT DAC CURRENT DAC INT/EXT SMARTSLEEP +3.3V CVBSIN CURRENT DAC EXTCVBSIN +3.3V VIDEO SIGNAL PRESENT 0 TO 50mV Figure 5. Full-Operation Mode with CVBSOUT2 Loaded 14 ______________________________________________________________________________________ +3.3V 2.9mA ...

Page 15

SmartSleep and Bidirectional Video Support VIDEO ENCODER CURRENT DAC CURRENT DAC INT/EXT SMARTSLEEP +3.3V CVBSIN CURRENT DAC EXTCVBSIN +3.3V VIDEO SIGNAL PRESENT 0 TO 50mV Figure 6. Full-Operation Mode with All Outputs Loaded ______________________________________________________________________________________ CVBS/S-Video Filter Amplifier with +3.3V 10.5mA ...

Page 16

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support Internal Mode Versus External Mode Set the INT/EXT control input low for internal mode. The MAX9508 processes video signals from an internal DVD CHIP CIN CURRENT DAC YIN CURRENT DAC LOGIC ...

Page 17

SmartSleep and Bidirectional Video Support Set the INT/EXT control input high for external mode. The 2:1 multiplexer selects the video signal on EXTCVBSIN (Figure 8). The YIN, CIN, and CVBSIN sig- DVD CHIP CIN CURRENT DAC YIN CURRENT DAC LOGIC ...

Page 18

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support The MAX9508 video inputs YIN, CIN, and CVBSIN should be directly connected to the output of the video current DAC. DC-coupling ensures that the input sig- nals are ground referenced such ...

Page 19

SmartSleep and Bidirectional Video Support Video Reconstruction Filter The MAX9508 filter passband is 6.75MHz, which makes the device suitable for the higher bandwidth video sig- nals from a DVD chip. Broadcast video signals actually require less bandwidth because of channel ...

Page 20

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support SET-TOP BOX CHIP CURRENT DAC CURRENT DAC INT/EXT SMARTSLEEP SHDN +3.3V CVBSIN CURRENT DAC EXTCVBSIN GND Figure 10. AC-Coupled Outputs Power-Supply Bypassing and Ground The MAX9508 operates from a single-supply voltage ...

Page 21

SmartSleep and Bidirectional Video Support CIN YIN INT/EXT SMARTSLEEP SHDN 0 TO 50mV CVBSIN EXTCVBSIN ______________________________________________________________________________________ CVBS/S-Video Filter Amplifier with Block Diagrams (continued) LOAD SENSE BUFFER 6dB LPF LOAD SENSE BUFFER 6dB LPF MAX9508 CONTROL LOGIC ACTIVE VIDEO LOAD SENSE ...

Page 22

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support TOP VIEW INT/EXT MAX9508 SMARTSLEEP 15 CIN THIN QFN (3mm x 3mm) 22 ______________________________________________________________________________________ 10 9 GND 8 7 N.C. 6 ...

Page 23

SmartSleep and Bidirectional Video Support (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) E MARKING E/2 AAAA D 0.10 C 0.08 C ...

Page 24

CVBS/S-Video Filter Amplifier with SmartSleep and Bidirectional Video Support (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) PKG 8L 3x3 12L 3x3 REF. MIN. NOM. ...

Page 25

... 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 ____________________ 25 © 2006 Maxim Integrated Products Heaney CVBS/S-Video Filter Amplifier with Package Information (continued registered trademark of Maxim Integrated Products, Inc. PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH 1 21-0055 F 1 ...

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