General Description
The MAX9512 video filter amplifier with SmartSleep™
and Y/C mixer is ideal for portable media players
(PMPs), portable DVD players, and set-top boxes
(STBs). The inputs can be directly connected to the digital-to-analog converter (DAC) outputs. The dual reconstruction filters remove high-frequency signals above
6.75MHz. The Y/C-to-CVBS mixer creates a composite
video signal from luma and chroma. The four amplifiers
each have 6dB of gain. The outputs can be DC-coupled
to a load of 75Ω, which is equivalent to two video loads,
or 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 MAX9512 does not
detect the presence of sync on luma, 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 MAX9512 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.
Applications
Features
o SmartSleep Feature Detects Input Signal and
Output Load Status to Reduce Power
Consumption
o Dual Standard-Definition Video Reconstruction
Filters with 6.75MHz Passband
o Luma and Chroma Inputs
o Y/C-to-CVBS Mixer
o Luma, Chroma, and Two Composite Outputs
o Supports Two Video Loads at Each Output
(DC-Coupled)
o 2.7V to 3.6V Single-Supply Operation
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
________________________________________________________________________________________________________________________________
Maxim Integrated Products
1
Pin Configurations
CIN
YIN
COUT
YOUT
CVBSOUT1
SHDN
ACTIVE VIDEO
DETECT
SMARTSLEEP
CVBSOUT2
LPF
CONTROL
LOGIC
BUFFER
LOAD SENSE
6dB
LPF
BUFFER
LOAD SENSE
6dB
LOAD SENSE
6dB
LOAD SENSE
6dB
MAX9512
Block Diagrams
Ordering Information
19-0535; Rev 0; 5/06
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.
Note: All devices specified over the -40°C to +125°C operating
temperature range.
+
Denotes lead-free package.
*
Future product—contact factory for availability.
**
EP = Exposed pad.
SmartSleep is a trademark of Maxim Integrated Products, Inc.
Pin Configurations continued at end of data sheet.
Block Diagrams continued at end of data sheet.
Portable Media Players
(PMPs)
Portable DVD Players
Set-Top Boxes (STBs)
Portable Applications
PART PIN-PACKAGE PKG CODE
MAX9512ATE+
MAX9512AEE+* 16 QSOP E16-4 —
16 TQFN-EP**
(3mm x 3mm)
T1633-4 AEN
TOP
MARK
TOP VIEW
13
V
DD
14
N.C.
SMARTSLEEP
15
16
CIN
CVBSOUT1
GND
CVBSOUT2
4
N.C.
GND
8
N.C.
7
SHDN
6
N.C.
5
COUT
12 10 9
11
MAX9512
+
13
2
DD
YIN YOUT
V
THIN QFN
(3mm x 3mm)
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= V
SHDN
= 3.3V, V
SMARTSLEEP
= GND = 0V. RL= No load. TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
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.
(All voltages referenced to GND)
V
DD
...........................................................................-0.3V to +4V
CIN, YIN, SMARTSLEEP, SHDN...............................-0.3V to +4V
Duration of COUT, YOUT, CVBSOUT1, CVBSOUT2
Short Circuit to V
DD
or GND....................................Continuous
Continuous Input Current (CIN, YIN,
SMARTSLEEP, SHDN)...................................................±20mA
Continuous Power Dissipation (T
A
= +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
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
2
______________________________________________________________________________________________________________________________________________________________________________
Supply Voltage Range V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Guaranteed by PSRR 2.7 3.6 V
DD
YIN = 0.3V, CIN = 0.6V 13 16 mA
SMARTSLEEP = VDD, YIN has no active
Supply Current I
Shutdown Supply Current I
SMARTSLEEP CHARACTERISTICS
Minimum Line Frequency YIN 14.3 kHz
Sync Slice Level YIN 4.1 5.2 % V
Output Load Detect Threshold RL to GND, sync pulse present 200 Ω
DC CHARACTERISTICS
Input-Voltage Range V
Input Current I
Input Resistance R
DC Voltage Gain A
DD
SHDN
video signal
SMARTSLEEP = VDD, YIN has a black-burst
video signal with sync tip at GND (Note 2)
V
= GND 0.01 10 µA
SHDN
CIN, YIN,
guaranteed by
IN
output voltage
swing
CIN = YIN = 0V 2 5 µA
IN
CIN, YIN 20 MΩ
IN
RL = 150Ω to
V
V
/ 2
DD
2.7V < VDD < 3.6V 0 1.05
3.0V < V
0V ≤ VIN ≤
1.05V, V
= 2.7V
0V ≤ V
IN
1.2V, V
DD
= 3.0V
DD
≤
< 3.6V 0 1.2
DD
TA = -40°C to
+85°C
T
= -40°C to
A
+125°C
TA = -40°C to
+85°C
T
= -40°C to
A
+125°C
5.7 6 6.3
5.6 6.3
5.7 6 6.3
5.6 6.3
714
µA
17
V
dB
DD
ELECTRICAL CHARACTERISTICS (continued)
(VDD= V
SHDN
= 3.3V, V
SMARTSLEEP
= GND = 0V. RL= No load. TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
______________________________________________________________________________________________________________________________________________________________________________
3
DC Gain Matching
Output Level CIN = YIN = 0V, RL = 150Ω to GND 0.188 0.3 0.400 V
Output Voltage Swing
Output Resistance R
Power-Supply Rejection Ratio PSRR
Output Shutdown Impedance 28 kΩ
LOGIC INPUTS (SMARTSLEEP, SSSSHHHHDDDDNNNN)
Logic-Low Threshold V
Logic-High Threshold V
Logic Input Current IIL/I
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
0V ≤ VIN ≤ 1.05V, VDD = 2.7V -0.2 0 +0.2
OUT
IL
IH
0V ≤ V
Measured at output, V
= 2.7V, 0V ≤ VIN ≤ 1.05V,
R
Measured at output,
V
R
Measured at output, V
= 3V, 0V ≤ VIN ≤ 1.2V, R
= 150Ω to -0.2V
Measured at output, VDD = 3V,
0V ≤ V
Measured at output, V
0V ≤ V
V
2.7V ≤ V
R
VI = 0V or V
IH
≤ 1.2V, VDD = 3.0V -0.2 0 +0.2
IN
= 150Ω to -0.2V
L
= 2.7V, 0V ≤ VIN ≤ 1.05V,
DD
= 150Ω to V
L
≤ 1.2V, RL = 150Ω to V
IN
≤ 1.05V, RL = 75Ω to -0.2V
IN
= 1.3V, -5mA ≤ I
OUT
DD
= 150Ω to GND
L
/ 2
DD
≤ 3.6V, input referred,
DD
DD
DD
L
= 3.135V,
DD
LOAD
TA = -40°C to
+85°C
T
= -40°C to
A
+125°C
TA = -40°C to
+85°C
T
= -40°C to
A
+125°C
/ 2
DD
≤ +5mA 0.47 Ω
2.027 2.1 2.163
2.006 2.163
2.027 2.1 2.163
2.316 2.4 2.472
2.292 2.472
2.316 2.4 2.472
2.027 2.1 2.163
48 dB
0.3 x V
0.7 x V
DD
0.01 10 µA
DD
dB
V
P-P
V
V
AC CHARACTERISTICS
(VDD= V
SHDN
= +3.3V, V
SMARTSLEEP
= GND = 0V, RL = 150Ω to GND. TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
4
______________________________________________________________________________________________________________________________________________________________________________
Color Subcarrier Output Voltage
Swing
Mixer HPF -3dB Frequency 300 kHz
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VDD = 2.7V, YIN = 0.65V, CIN = 0.7V
VDD = 3.0V, YIN = 0.75V, CIN = 0.9V
f = 5.5MHz -0.1
P-P
P-P
1.4
1.8
V
P-P
Standard-Definition
Reconstruction Filter
Differential Gain DG
Differential Phase DP
2T Pulse Response 2T = 200ns or 250ns 0.2 K%
Inputs are 1V
Reference frequency is
1MHz
DC-coupled output, 5-step
modulated staircase
AC-coupled output, 5-step
modulated staircase
DC-coupled output, 5-step
modulated staircase
AC-coupled output, 5-step
modulated staircase
P-P
,
f = 6.75MHz -1 -0.3 +1
f = 11MHz -3
f = 27MHz -33 -41
f = 3.58MHz or
4.43MHz
f = 3.58MHz or
4.43MHz
f = 3.58MHz 0.62
f = 4.43MHz 0.75
f = 3.58MHz 0.78
f = 4.43MHz 1.01
0.2
0.4
dB
%
degrees
AC CHARACTERISTICS (continued)
(VDD= V
SHDN
= +3.3V, V
SMARTSLEEP
= GND = 0V, RL = 150Ω to GND. TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25°C.) (Note 1)
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
______________________________________________________________________________________________________________________________________________________________________________
5
Note 1: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
Note 2: Specified current is an average over time.
2T Bar Response
2T Pulse-to-Bar K Rating
Nonlinearity 5-step staircase 0.1 %
Interchannel Timing Error
Group Delay Distortion 100kHz ≤ f ≤ 5MHz, inputs are 1V
Interchannel Group Delay
Distortion Error
Peak Signal to RMS Noise 100kHz ≤ f ≤ 5MHz, inputs are 1V
Power-Supply Rejection Ratio f = 100kHz, 200mV
Output Impedance f = 5MHz 6 Ω
Enable Time
Disable Time
CROSSTALK
All Hostile Output Crosstalk f = 4.43MHz -71 dB
All Hostile Input Crosstalk
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
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
Difference in time between the 50% point of
the output signals, YOUT to COUT
Outputs are 2V
YIN = 1V, output settled to within 1% of the
final voltage, R
YIN = 1V, output settled to within 1% of the
final voltage, R
f = 4.43MHz, SHDN = GND,
input termination resistors are 75Ω
P-P
, input referred 43 dB
P-P
= 150Ω to GND
L
= 150Ω to GND
L
0.2 K%
0.3 K%
0.2 ns
P-P
P-P
10 ns
2ns
67 dB
13 µs
1.1 µs
-106 dB
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
6
______________________________________________________________________________________________________________________________________________________________________________
Typical Operating Characteristics
(V
DD
= SHDN = +3.3V, V
SMARTSLEEP
= GND = 0V. Video outputs have RL = 150Ω connected to GND. TA= +25°C, unless otherwise
noted.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX9512 toc01
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dB)
10M1M
-50
-40
-30
-20
-10
0
10
20
-60
100k 100M
V
OUT
= 100mV
P-P
NORMALIZED TO 1MHz
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX9512 toc02
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dB)
1M 10M
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
100k 100M
V
OUT
= 100mV
P-P
NORMALIZED TO 1MHz
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX9512 toc03
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dB)
10M1M
-50
-40
-30
-20
-10
0
10
20
-60
100k 100M
V
OUT
= 2V
P-P
NORMALIZED TO 1MHz
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX9512 toc04
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dB)
1M 10M
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
100k 100M
V
OUT
= 2V
P-P
NORMALIZED TO 1MHz
GROUP DELAY
MAX9512 toc05
FREQUENCY (Hz)
DELAY (ns)
10M1M
0
25
50
75
100
125
150
-25
100k 100M
V
OUT
= 2V
P-P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9512 toc06
FREQUENCY (Hz)
PSRR (dB)
10M1M100k
-70
-60
-50
-40
-30
-20
-10
0
-80
10k 100M
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX9512 toc07
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
1007550250-25
11.5
12.0
12.5
13.0
13.5
14.0
11.0
-50 125
VOLTAGE GAIN
vs. TEMPERATURE
MAX9512 toc08
TEMPERATURE (°C)
VOLTAGE GAIN (V/V)
1007550250-25
1.96
1.97
1.98
2.00
1.99
2.01
2.02
1.95
-50 125
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
_______________________________________________________________________________________
7
Typical Operating Characteristics (continued)
(V
DD
= SHDN = +3.3V, V
SMARTSLEEP
= GND = 0V. Video outputs have RL = 150Ω connected to GND. TA= +25°C, unless otherwise
noted.)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
OUTPUT VOLTAGE (V)
0.5
0
-0.5
-0.5 2.0
vs. INPUT VOLTAGE
YIN, CIN
INPUTS ONLY
OUTPUT VOLTAGE
INPUT VOLTAGE (V)
12.5T RESPONSE
2T RESPONSE
100ns/div
PAL MULTIBURST RESPONSE
1.51.00.50
MAX9512 toc12
MAX9512 toc09
(%)
-0.1
-0.2
DIFFERENTIAL GAIN
-0.3
(DEG)
-0.4
DIFFERENTIAL PHASE
-0.8
YIN
200mV/div
YOUT
400mV/div
DIFFERENTIAL GAIN AND PHASE
0.3
0.2
0.1
0
0.8
0.4
0
176
5432176
5432
STEP
NTC-7 VIDEO TEST SIGNAL GENERATED
FROM LUMA AND CHROMA INPUTS
MAX9512 toc13
MAX9512 toc10
YIN
500mV/div
CIN
500mV/div
CVBOUT1
1V/div
MAX9512 toc11
MAX9512 toc14
V
IN
200mV/div
V
OUT
400mV/div
CVBSIN
500mV/div
CVBSOUT1
1V/div
400ns/div
PAL COLOR BARS
10µs/div
MAX9512 toc15
CVBSIN
500mV/div
CVBSOUT1
1V/div
10µs/div
10µs/div
FIELD SQUARE-WAVE RESPONSE
2ms/div
MAX9512 toc16
CVBSIN
500mV/div
CVBSOUT1
1V/div
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
8
______________________________________________________________________________________________________________________________________________________________________________
Typical Operating Characteristics (continued)
(V
DD
= SHDN = +3.3V, V
SMARTSLEEP
= GND = 0V. Video outputs have RL = 150Ω connected to GND. TA= +25°C, unless otherwise
noted.)
ENABLE TIME
MAX9512 toc17
2µs/div
OUTPUT
1V/div
SHDN
1V/div
INPUT VOLTAGE = 1V
DISABLE TIME
MAX9512 toc18
200ns/div
OUTPUT
1V/div
SHDN
1V/div
INPUT VOLTAGE = 1V
FREQUENCY RESPONSE
AT 6.75MHz DISTRIBUTION
MAX9512 toc19
ATTENUATION (dB)
PROBABILITY
-0.1-0.2-0.3-0.4-0.5-0.6 0
FREQUENCY RESPONSE
AT 27MHz DISTRIBUTION
MAX9512 toc20
ATTENUATION (dB)
PROBABILITY
-34-36-40 -38-48 -46 -44 -42-50-52 -32
INPUT-TO-INPUT CROSSTALK
vs. FREQUENCY
MAX9512 toc21
FREQUENCY (Hz)
CROSSTALK (dB)
10M1M
-100
-80
-60
-40
-20
0
-120
100k 100M
OUTPUT-TO-OUTPUT CROSSTALK
vs. FREQUENCY
MAX9512 toc22
FREQUENCY (Hz)
CROSSTALK (dB)
10M1M
-100
-80
-60
-40
-20
0
-120
100k 100M
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX9512 toc23
FREQUENCY (Hz)
OUTPUT IMPEDANCE (Ω)
1M 10M
1
10
100
0.1
100k 100M
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
______________________________________________________________________________________________________________________________________________________________________________
9
Pin Description
Figure 1. Typical Application Circuit for Portable Media Players
PIN
TQFN QSOP
1, 13 3, 15 V
NAME FUNCTION
DD
Power Supply. Bypass with a 0.1µF capacitor to GND.
2 4 YIN Luma Video Input. Directly connect this input to the video DAC output.
3, 8 5, 10 GND Ground
4, 5, 7, 14 6, 7, 9, 16 N.C. No Connection. Connect to GND.
68 SHDN
Active-Low Shutdown Logic Input. Connect to logic low to place device in shutdown.
Connect to logic high for normal operation.
9 11 CVBSOUT2 CVBS Output 2
10 12 CVBSOUT1 CVBS Output 1
11 13 YOUT Luma Video Output
12 14 COUT Chroma Video Output
15 1 SMARTSLEEP SmartSleep Logic Input. Connect to logic high to activate SmartSleep operation.
16 2 CIN Chroma Video Input. Directly connect this input to the video DAC output.
EP — EP Exposed Pad. Connect EP to GND. EP is also internally connected to GND.
+3.3V
0.1µF
V
DD
VIDEO ENCODER
CURRENT
DAC
BUFFER
CIN
LPF
6dB
LOAD SENSE
COUT
75Ω
CHROMA
BUFFER
SMARTSLEEP
SHDN
YIN
LPF
ACTIVE VIDEO
DETECT
CONTROL
LOGIC
CURRENT
DAC
+3.3V
MAX9512
GND
6dB
6dB
6dB
LOAD SENSE
LOAD SENSE
LOAD SENSE
YOUT
CVBSOUT1
CVBSOUT2
75Ω
LUMA
75Ω
CVBS1
75Ω
CVBS2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
10
____________________________________________________________________________________________________________________________________________________________________________
Figure 2. Standby Mode Operation
Detailed Description
In the Typical Application Circuit (Figure 1), the current
DACs on a video encoder generate luma and chroma
video signals. The MAX9512 filters those signals and
then adds them together to create the composite video
signal. The output amplifiers drive the video connectors
through a 75Ω back termination resistor.
SmartSleep Feature
The SmartSleep feature is activated when the
SMARTSLEEP input is connected to logic high. The
SmartSleep feature provides intelligent power management by selectively disabling the filters and output amplifiers based on the presence of a luma video signal or
loads attached to the outputs. If the SmartSleep feature
is not activated and the part is not in shutdown, the filters
and output amplifiers completely turn on, regardless of
whether there is a video signal at the YIN input and
whether there are loads connected at the outputs.
SmartSleep only works with DC-coupled loads.
Standby Mode
In standby mode, the filters and output amplifiers are
off and only the active video detect circuit is active.
Quiescent current consumption is approximately 7µA
(Figure 2). The active video detect circuit checks if
sync is present on the YIN signal. If no sync is detected
the device remains in standby mode.
VIDEO ENCODER
CURRENT
DAC
CURRENT
DAC
NO VIDEO
SIGNAL
BUFFER
CIN
OFF
BUFFER
YIN
OFF
+3.3V
7µA
V
DD
LPF
LPF
OFF
OFF
OFF
6dB
OFF
6dB
OFF
LOAD SENSE
OFF
LOAD SENSE
OFF
COUT
YOUT
75Ω
75Ω
CHROMA
LUMA
LOAD SENSE
OFF
LOAD SENSE
OFF
+3.3V
SMARTSLEEP
SHDN
ACTIVE VIDEO
DETECT
CONTROL
LOGIC
6dB
OFF
6dB
OFF
MAX9512
GND
CVBSOUT1
CVBSOUT2
75Ω
CVBS1
75Ω
CVBS2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
____________________________________________________________________________________________________________________________________________________________________________
11
Active-Detect Mode
The active video detect circuit slices the YIN signal at
4.7% of the power supply (155mV for a 3.3V supply). If
the transitions occur at a rate of 14kHz or higher, then
a video signal is present. When the MAX9512 detects
a video signal with sync at the YIN input, the control
logic enters the active-detect mode and enables the
load sense circuitry (Figure 3). The supply current is
typically 17µA.
If an output load is not connected to any amplifier, the
MAX9512 remains in active-detect mode. Eight times per
second, each load-sense circuit checks for a load by
connecting an internal 15kΩ pullup resistor to the output
for 1ms. If the output is pulled up, then no load is present. If the output stays low, a load is connected.
Full-Operation Mode
If a load is connected to an output, the corresponding
filter and amplifier turn on and remain on until the output load is disconnected. In full-operation mode,
SmartSleep intelligently reduces the supply current
based on the input signal presence and output loading.
Figures 4 and 5 show which portions of the MAX9512
turn on and which remain off with different load configurations. In Figure 4, both filters and the Y/C mixer turn
on to generate the composite video signal for the
amplifier connected to CVBSOUT1. In Figure 5, only the
luma filter turns on, and the Y/C mixer stays off.
When an amplifier is on, it continually checks if the load
has been disconnected by detecting if the amplifier
output is sourcing current during a horizontal line time.
If no sourcing current is detected within one horizontal
line time (approximately 64µs), the load has been disconnected and the amplifier returns to active-detect
mode. If, at any time, the input video signal is removed,
the MAX9512 returns to standby mode.
If the SmartSleep feature is not activated and the part is
not in shutdown, then the filters and amplifiers completely turn on, regardless of whether there is a video
signal at the CVBSIN input and whether there are loads
connected at the outputs.
Figure 3. Active-Detect Mode with No Output Loads
17µA
VIDEO SIGNAL
PRESENT
VIDEO ENCODER
BUFFER
CURRENT
DAC
CIN
OFF
LPF
OFF
+3.3V
V
DD
6dB
OFF
LOAD SENSE
COUT
75Ω
CHROMA
BUFFER
CURRENT
DAC
+3.3V
YIN
OFF
ACTIVE VIDEO
SMARTSLEEP
SHDN
MAX9512
DETECT
CONTROL
LOGIC
LPF
OFF
OFF
GND
6dB
OFF
6dB
OFF
6dB
OFF
LOAD SENSE
LOAD SENSE
LOAD SENSE
YOUT
CVBSOUT1
CVBSOUT2
75Ω
75Ω
75Ω
LUMA
CVBS1
CVBS2
NO
LOADS
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
12
____________________________________________________________________________________________________________________________________________________________________________
Figure 4. Full Operation Mode with CVBSOUT1 Loaded
+3.3V
5mA QUIESCENT
SUPPLY CURRENT
PLUS
OUTPUT LOAD CURRENT
BUFFER
LPF
V
DD
LOAD SENSE
6dB
OFF
COUT
VIDEO ENCODER
CURRENT
DAC
VIDEO SIGNAL
PRESENT
CIN
75Ω
CHROMA
BUFFER
SMARTSLEEP
SHDN
YIN
ACTIVE VIDEO
DETECT
CONTROL
LOGIC
CURRENT
DAC
+3.3V
MAX9512
LPF
GND
6dB
OFF
6dB
6dB
OFF
LOAD SENSE
LOAD SENSE
LOAD SENSE
YOUT
CVBSOUT1
CVBSOUT2
75Ω
75Ω
75Ω
LUMA
CVBS1
75Ω
CVBS 2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
____________________________________________________________________________________________________________________________________________________________________________
13
Figure 5. Full Operation Mode with YOUT Loaded
VIDEO ENCODER
CURRENT
DAC
CURRENT
DAC
+3.3V
VIDEO SIGNAL
PRESENT
CIN
YIN
2.9mA QUIESCENT
SUPPLY CURRENT
PLUS
OUTPUT LOAD CURRENT
BUFFER
LPF
OFF
BUFFER
LPF
OFF
OFF
V
DD
6dB
OFF
6dB
LOAD SENSE
COUT
LOAD SENSE
YOUT
75Ω
75Ω
CHROMA
LUMA
75Ω
SMARTSLEEP
+3.3V
SHDN
MAX9512
ACTIVE VIDEO
DETECT
CONTROL
LOGIC
GND
6dB
OFF
6dB
OFF
LOAD SENSE
LOAD SENSE
CVBSOUT1
CVBSOUT2
75Ω
CVBS1
75Ω
CVBS2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
14
____________________________________________________________________________________________________________________________________________________________________________
Inputs
The MAX9512 video inputs YIN and CIN should be
directly connected to the output of the video current
DAC. DC-coupling ensures that the input signals are
ground referenced such that the sync tip of the luma
signal is within 50mV of ground and the blank level of
the chroma signal is between 0.5V and 0.65V.
Video Reconstruction Filter
The MAX9512 filter passband is 6.75MHz, which makes
the device suitable for the higher bandwidth video signals from a DVD chip. Broadcast video signals actually
require less bandwidth because of channel limitations:
NTSC signals have 4.2MHz bandwidth, and PAL signals
have 5MHz bandwidth. Video signals from a DVD player
are not channel limited; therefore, the bandwidth of DVD
video signals can push right against the Nyquist limit of
6.75MHz. (Recommendation ITU-R BT.601-5 specifies
13.5MHz as the sampling rate for standard-definition
video). Therefore, the maximum bandwidth of the signal
is 6.75MHz. To ease the filtering requirements, most
modern video systems oversample by two times; clocking the video current DAC at 27MHz.
Y/C Mixer
The Y/C mixer adds the luma and chroma signals
together to create a composite video signal. Since
chroma is a phase modulated carrier at 3.58MHz for
NTSC and 4.43MHz for PAL, the chroma signal is ACcoupled into the Y/C mixer so that the variation in blank
level from one video source to another video source
does not affect the DC bias of the composite video signal. The highpass corner frequency of the chroma ACcoupling circuit is 300kHz.
Outputs
The video output amplifiers can both source and sink
load current, allowing output loads to be DC- or ACcoupled. The amplifier output stage needs about
300mV of headroom from either supply rail. The
MAX9512 has an internal level shift circuit that positions
the sync tip at approximately 300mV at the output. The
blank level of the chroma output is positioned at
approximately 1.3V if the blank level of the chroma
input signal is 0.5V. The blank level of the chroma output is positioned at approximately 1.5V if the blank level
of the chroma input signal is 0.6V.
If the supply voltage is greater than 3.135V (5% below
a 3.3V supply), each amplifier can drive two DC-coupled video loads to ground. If the supply is less than
3.135V, each amplifier can drive only one DC-coupled
or AC-coupled video load.
Shutdown
When SHDN is low, the MAX9512 draws less than 1µA
supply current. All the amplifier outputs become high
impedance. The effective output resistance at the video
outputs is 28kΩ, due to the internal feedback resistors
to ground.
Applications Information
Reducing Power Consumption in
the Video DACs
YIN and CIN have high-impedance input buffers and
can work with source resistances as high as 300Ω. To
reduce power dissipation in the video DACs, the DAC
output resistor can be scaled up in value. The reference resistor that sets the reference current inside the
video DACs must also be similarly scaled up. For
instance, if the output resistor is 37.5Ω, the DAC must
source 26.7mA when the output is 1V. If the output
resistor is increased to 300Ω, the DAC only needs to
source 3.33mA when the output is 1V.
There is parasitic capacitance from the DAC output to
ground. That capacitance in parallel with the DAC output resistor forms a pole that can potentially roll off the
frequency response of the video signal. For example,
300Ω in parallel with 50pF creates a pole at 10.6MHz.
To minimize this capacitance, reduce the area of the
signal trace attached to the DAC output as much as
possible, and place the MAX9512 as close to the video
DAC outputs as possible.
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
____________________________________________________________________________________________________________________________________________________________________________
15
Figure 6. AC-Coupling at the Outputs
AC-Coupling the Outputs
The outputs can be AC-coupled since the output stage
can source and sink current as shown in Figure 6.
Coupling capacitors should be 220µF or greater to
keep the highpass filter formed by the 150Ω equivalent
resistance of the video transmission line to a corner frequency of 4.8Hz or below. The frame rate of PAL systems is 25Hz, and the frame rate of NTSC systems is
30Hz. The corner frequency should be well below the
frame rate.
Power-Supply Bypassing and Ground
The MAX9512 operates from a single-supply voltage
down to 2.7V, allowing for low-power operation. Bypass
V
DD
to GND with a 0.1µF capacitor. Place all external
components as close to the device as possible.
VIDEO ENCODER
BUFFER
CURRENT
DAC
CURRENT
DAC
CIN
LPF
BUFFER
YIN
LPF
+3.3V
0.1µF
V
DD
6dB
6dB
LOAD SENSE
COUT
LOAD SENSE
YOUT
75Ω
75Ω
220µF
220µF
CHROMA
LUMA
SMARTSLEEP
0V
+3.3V
SHDN
ACTIVE VIDEO
MAX9512
DETECT
CONTROL
LOGIC
GND
6dB
6dB
LOAD SENSE
LOAD SENSE
CVBSOUT1
CVBSOUT2
75Ω
75Ω
220µF
CVBS1
220µF
CVBS2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
16
____________________________________________________________________________________________________________________________________________________________________________
Pin Configurations (continued)
Chip Information
PROCESS: BiCMOS
CIN
YIN
COUT
YOUT
CVBSOUT1
SHDN
ACTIVE VIDEO
DETECT
SMARTSLEEP
CVBSOUT2
LPF
CONTROL
LOGIC
BUFFER
LOAD SENSE
6dB
LPF
BUFFER
LOAD SENSE
6dB
LOAD SENSE
6dB
LOAD SENSE
6dB
MAX9512
0
TO
50mV
300mV
TO
400mV
Block Diagrams (continued)
TOP VIEW
+
MAX9512
QSOP
16
N.C.
15
V
COUT
14
YOUT
13
CVBSOUT1
12
CVBSOUT2
11
GND
10
N.C.
9
DD
SMARTSLEEP
1
CIN
2
V
3
DD
4
YIN
GND
5
N.C.
6
N.C.
7
SHDN
8
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
____________________________________________________________________________________________________________________________________________________________________________
17
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages
.)
MARKING
D/2
D
0.10 C 0.08 C
E/2
AAAA
L
(NE - 1) X e
E2/2
E2
D2/2
D2
b
0.10 M C A B
C
L
L
e
12x16L QFN THIN.EPS
E
(ND - 1) X e
C
L
C
L
A
A2
A1
L
e
k
C
L
e
PACKAGE OUTLINE
8, 12, 16L THIN QFN, 3x3x0.8mm
21-0136
1
G
2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
18
____________________________________________________________________________________________________________________________________________________________________________
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages
.)
PKG
8L 3x3
MIN.
NOM. MAX.
REF. MIN.
0.70 0.75 0.80
A
b
0.25 0.30 0.35
D
2.90
3.00 3.10
E
2.90 3.00 3.10
e
0.65 BSC.
0.35
0.55 0.75
L
N
ND
NE
0.02
A1
0
A2
0.20 REF
k
0.25
NOTES:
1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994.
2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES.
3. N IS THE TOTAL NUMBER OF TERMINALS.
4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO
JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED
WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR
MARKED FEATURE.
5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm
FROM TERMINAL TIP.
6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY.
7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION.
8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS.
9. DRAWING CONFORMS TO JEDEC MO220 REVISION C.
10. MARKING IS FOR PACKAGE ORIENTATION REFERENCE ONLY.
11. NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY.
8
2
2
0.05
--
0.70
0.20
2.90
2.90
0.45
0.25
12L 3x3
NOM. MAX. NOM.
0.75
0.80
0.25
0.30
3.00
3.10
3.00
3.10
0.50 BSC.
0.55
0.65
12
3
0.0230.05
0
0.20 REF
-
-
16L 3x3
MIN. MAX.
0.70
0.75
0.80
0.20
0.25
2.90
0
3.00
3.00
0.50 BSC.
0.40
16
4
4
0.02
0.20 REF
-
0.30
3.10
3.10
0.50
0.05
2.90
0.30
0.25
EXPOSED PAD VARIATIONS
PKG.
CODES
TQ833-1
T1233-1
T1233-3
T1233-4
T1633-1
T1633-2
T1633F-3
T1633FH-3
-
T1633-4
MIN.
0.25
0.95
0.95
0.95
0.95
0.95
0.65
0.65
0.95
D2
NOM.
0.70
1.10
1.10
1.10
1.10
1.10
0.80
0.80
1.10
MAX.
1.25
1.25
1.25
1.25
1.25
1.25
0.95
0.95
1.25
E2
NOM.
MIN.
0.25
0.95
0.95 1.10
0.95
0.95
0.65
0.65
0.95
MAX.
1.25
0.70
1.10
1.25
1.100.95
1.25
1.10
1.25
1.10
0.95
0.80
0.95
0.80
1.25
1.10
PACKAGE OUTLINE
8, 12, 16L THIN QFN, 3x3x0.8mm
PIN ID
0.35 x 45° NOWEEC
0.35 x 45°
0.35 x 45°1.25 WEED-1
0.35 x 45°
0.35 x 45° WEED-2
0.35 x 45°
0.225 x 45°
0.225 x 45°
0.35 x 45°
21-0136
JEDEC
WEED-1
WEED-2
WEED-2
WEED-2
WEED-2
DOWN
BONDS
ALLOWED
NO
YES
YESWEED-11.25
NO
YES
N/A
N/A
NO
2
G
2
MAX9512
Video Filter Amplifier with SmartSleep
and Y/C Mixer Circuit
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. 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 ____________________
19
© 2006 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages
.)
QSOP.EPS
PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH
21-0055
1
F
1
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