19-0531; Rev 0; 5/06
Video Filter Amplifier with 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 directly con-
nected to the digital-to-analog converter (DAC) outputs.
The reconstruction filter removes high-frequency sig-
nals 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.
Features
o
SmartSleep Feature Detects Input Signal and
Output Load Status to Reduce Power
Consumption
o
Triple Standard-Definition Video Reconstruction
Filters with 6.75MHz Passband
o
Luma, Chroma, and Composite Inputs
o
Luma, Chroma, and Two Composite Outputs
o
Integrated Support for a Bidirectional Composite
Video Signal
o
Supports Two Video Loads at Each Output
(DC-Coupled)
o
2.7V to 3.6V Single-Supply Operation
MAX9508
Ordering Information
PART
MAX9508ATE+
PIN-PACKAGE PKG CODE
16 TQFN-EP**
(3mm x 3mm)
T1633-4
E16-4
TOP MARK
AEM
—
MAX9508AEE+* 16 QSOP
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.
Block Diagrams
BUFFER
CIN
LPF
BUFFER
YIN
LPF
INT/EXT
6dB
6dB
LOAD SENSE
COUT
Applications
Set-Top Boxes (STBs)
Portable Set-Top Boxes/
Personal Video Recorders (PVRs)
Portable Media Players (PMPs)
Portable DVD Players
Portable Applications
LOAD SENSE
YOUT
SMARTSLEEP
SHDN
CONTROL
LOGIC
ACTIVE VIDEO
DETECT
MAX9508
LOAD SENSE
6dB
CVBSOUT1
CVBSIN
BUFFER
EXTCVBSIN
CLAMP
6dB
LPF
LOAD SENSE
CVBSOUT2
Pin Configurations appear at end of data sheet.
SmartSleep is a trademark of Maxim Integrated Products, Inc.
Block Diagrams continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
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.
Video Filter Amplifier with SmartSleep and
Bidirectional Video Support
MAX9508
ABSOLUTE MAXIMUM RATINGS
(Voltages with respect to GND.)
VDD ..........................................................................-0.3V to +4V
SMARTSLEEP,
SHDN, INT/EXT
CIN, YIN, CVBSIN, EXTCVBSIN ..........................-0.3V to +4V
Duration of COUT, YOUT, CVBSOUT1, CVBSOUT2
Short Circuit to VDD or GND ..................................Continuous
Continuous Input Current
(CIN, YIN, EXTCVBSIN, CVBSIN,
SMARTSLEEP,
SHDN, INT/EXT)...................................±20mA
Continuous Power Dissipation (TA = +70°C)
16-Pin TQFN (derate 15.6mW/°C above +70°C)..........1250mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
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.
ELECTRICAL CHARACTERISTICS
(V
DD
= V
SHDN
= 3.3V, V
SMARTSLEEP
= V
INT/EXT
= GND = 0V, R
L
= No load. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
V
DD
CONDITIONS
Guaranteed by PSRR
INT/E
XT = GND (4 channels active),
YIN = CVBSIN = 0.3V, CIN = 0.6V
INT/EXT
= V
DD
(1 channel active),
EXTCVBSIN is unconnected
Supply Current
I
DD
SMARTSLEEP = V
DD,
CVBSIN has no active video signal
SMARTSLEEP = V
DD
, CVBSIN has a black-
burst video signal with sync tip at GND
(Note 2)
Shutdown Supply Current
SMARTSLEEP CHARACTERISTICS
Minimum Line Frequency
Sync Slice Level
Output Load Detect Threshold
DC CHARACTERISTICS
Input-Voltage Range
Input Current
Input Resistance
V
IN
I
IN
R
IN
CIN, YIN, CVBSIN,
guaranteed by output
voltage swing
CIN, YIN, CVBSIN
2.7V < V
DD
< 3.6V
3.0V < V
DD
< 3.6V
0
0
2
20
1.05
V
1.2
5
µA
MΩ
CVBSIN
CVBSIN
Sync pulse present, R
L
to GND
14.3
4.1
5.2
200
kHz
% V
DD
Ω
I
SHDN
V
SHDN
= GND
MIN
2.7
13
4.3
7
TYP
MAX
3.6
16
mA
6
14
µA
17
0.01
10
µA
UNITS
V
CIN = YIN = CVBSIN = 0V
2
_______________________________________________________________________________________
Video Filter Amplifier with SmartSleep and
Bidirectional Video Support
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= V
SHDN
= 3.3V, V
SMARTSLEEP
= V
INT/EXT
= GND = 0V, R
L
= No load. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Note 1)
PARAMETER
Sync-Tip Clamp Level
Input Clamping Current
EXTCVBSIN Input Voltage Range
SYMBOL
V
CLP
EXTCVBSIN
EXTCVBSIN = 500mV + V
CLP
Guaranteed by
output voltage
swing
2.7V < V
DD
< 3.6V
3.0V < V
DD
< 3.6V
CONDITIONS
MIN
0.25
0.5
1
TYP
MAX
0.37
1.5
1.05
V
P-P
1.2
UNITS
V
µA
MAX9508
Sync Crush
EXTCVBSIN, percentage reduction in sync
pulse (0.3V
P-P
), guaranteed by input
clamping current measurement, measured
at input
EXTCVBSIN
A
V
R
L
= 150Ω to V
DD
/2, 0V
≤
V
IN
≤
1.05V,
V
DD
= 2.7V
R
L
= 150Ω to V
DD
/2, 0V
≤
V
IN
≤
1.05V,
V
DD
= 2.7V
YIN = CVBSIN = CIN = 0V,
INT/EXT
= GND, R
L
= 150Ω to GND
C
EXTCVBSIN
= 0.1µF to GND,
INT/EXT
= V
DD,
R
L
= 150Ω to GND
Measured at output,
V
DD
= 2.7V,
0V
≤
V
IN
≤
1.05V,
R
L
= 150Ω to -0.2V
T
A
= -40°C to
+85°C
T
A
= -40°C to
+125°C
5.7
-0.2
0.21
0.21
2.027
2.006
2.027
2.316
2.292
2.316
2.027
2.4
2.1
0.47
2.1
2.4
300
6
0
0.3
0.27
2.1
2
%
Maximum Input Source
Resistance
DC Voltage Gain
DC Gain Matching
Ω
6.3
+0.2
0.38
V
0.38
2.163
2.163
2.163
2.472
2.472
2.472
2.163
Ω
V
P-P
dB
dB
Output Level
Measured at output, V
DD
= 2.7V,
0V
≤
V
IN
≤
1.05V, R
L
= 150Ω to V
DD
/ 2
Output Voltage Swing
Measured at output,
V
DD
= 3V,
0V
≤
V
IN
≤
1.2V,
R
L
= 150Ω to -0.2V
T
A
= -40°C to
+85°C
T
A
= -40°C to
+125°C
Measured at output, V
DD
= 3V,
0V
≤
V
IN
≤
1.2V, R
L
= 150Ω to V
DD
/ 2
Measured at output, V
DD
= 3.135V,
0V
≤
V
IN
≤
1.05V, R
L
= 75Ω to -0.2V
Output Resistance
R
OUT
V
OUT
= 1.3V, -5mA
≤
I
LOAD
≤
+5mA
_______________________________________________________________________________________
3
Video Filter Amplifier with SmartSleep and
Bidirectional Video Support
MAX9508
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= V
SHDN
= 3.3V, V
SMARTSLEEP
= V
INT/EXT
= GND = 0V, R
L
= No load. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical val-
ues are at T
A
= +25°C.) (Note 1)
PARAMETER
Power-Supply Rejection Ratio
Output Pulldown Resistance
Output Shutdown Impedance
LOGIC INPUTS (SMARTSLEEP,
SHDN, INT/EXT)
Logic-Low Threshold
Logic-High Threshold
Logic Input Current
V
IL
V
IH
I
IL
/ I
IH
V
I
= 0V or V
DD
0.7 x
V
DD
0.01
10
0.3 x
V
DD
V
V
µA
SYMBOL
PSRR
R
PD
CONDITIONS
2.7V
≤
V
DD
≤
3.6V, input referred,
R
L
= 150Ω to GND
INT/EXT
= V
DD
, CVBSOUT1
MIN
48
3.7
28
TYP
MAX
UNITS
dB
Ω
kΩ
AC ELECTRICAL CHARACTERISTICS
(V
DD
= V
SHDN
= 3.3V, V
SMARTSLEEP
= V
INT/EXT
= GND = 0V, R
L
= 150Ω to GND. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
PARAMETER
Standard-Definition
Reconstruction Filter
SYMBOL
CONDITIONS
f = 5.5MHz
Inputs are 1V
P-P
, reference
frequency is 1MHz.
f = 6.75MHz
f = 11MHz
f = 27MHz
DC-coupled output,
5-step modulated staircase
Differential Gain
DG
AC-coupled output,
5-step modulated staircase
DC-coupled output,
5-step modulated staircase
Differential Phase
DP
AC-coupled output,
5-step modulated staircase
2T Pulse Response
2T Bar Response
2T Pulse-to-Bar K
Rating
2T = 200ns or 250ns
Bar time is 18µs, the beginning 2.5% and the ending 2.5%
of the bar time is ignored, 2T = 200ns or 250ns
Bar time is 18µs, the beginning 2.5% and the ending 2.5%
of the bar time is ignored, 2T = 200ns or 250ns
f = 3.58MHz or
4.43MHz
f = 3.58MHz
f = 4.43MHz
f = 3.58MHz
f = 4.43MHz
0.4
0.62
0.75
0.78
1.01
0.2
0.2
0.3
K%
K%
K%
Degrees
f = 3.58MHz or
4.43MHz
-33
-1
MIN
TYP
-0.1
-0.3
-3
-41
0.2
%
+1
dB
MAX
UNITS
4
_______________________________________________________________________________________
Video Filter Amplifier with SmartSleep and
Bidirectional Video Support
AC ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= V
SHDN
= 3.3V, V
SMARTSLEEP
= V
INT/EXT
= GND = 0V, R
L
= 150Ω to GND. T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25°C.) (Note 1)
PARAMETER
Nonlinearity
Interchannel Timing
Error
Group Delay
Distortion
Interchannel Group
Delay Distortion Error
Peak Signal to RMS
Noise
Power-Supply
Rejection Ratio
Output Impedance
Enable Time
Disable Time
CROSSTALK
All Hostile Output
Crosstalk
All Hostile Input
Crosstalk
f = 4.43MHz
f = 4.43MHz,
SHDN
= GND,
input termination resistors are 75Ω
-70
-69
dB
dB
SYMBOL
5-step staircase
Difference in time between the 50% point of the output
signals, YOUT to COUT
100kHz
≤
f
≤
5MHz, inputs are 1V
P-P
Inputs are 1V
P-P
100kHz
≤
f
≤
5MHz, inputs are 1V
P-P
f = 100kHz, 200mV
P-P
, input referred
f = 5MHz
YIN = 1V, output settled to within 1% of the final voltage,
R
L
= 150Ω to GND
YIN = 1V, output settled to within 1% of the final voltage,
R
L
= 150Ω to GND
CONDITIONS
MIN
TYP
0.1
0.2
10
2
67
43
6
13
1.1
MAX
UNITS
%
ns
ns
ns
dB
dB
Ω
µs
µs
MAX9508
Note 1:
All devices are 100% production tested at T
A
= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2:
Specified current is an average over time.
_______________________________________________________________________________________
5
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