19-4122; Rev 0; 4/08
KIT
ATION
EVALU
LE
B
A
IL
A
AV
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
The MAX11506/MAX11507 integrated filters offer six
channels, three for standard-definition (SD) video and
three for either SD or high-definition (HD) video, and
include +6dB output buffers on each channel. These
video filters are ideal for anti-aliasing and DAC smoothing in applications such as set-top boxes, digital video
recorders, DVD players, and personal video recorders.
The MAX11506/MAX11507 video inputs feature a transparent clamp compatible with AC- and DC-coupled input
signals and allow DAC outputs to be directly coupled. The
filters provide -3dB bandwidth of 9.0MHz for the SD filters
and 33MHz for the HD filters. Each channel includes an
output buffer with a gain of +6dB capable of driving a full
2VP-P video signal into a 150Ω video load. The buffers
drive either AC- or DC-coupled loads and assure a blanking level of below 1V after the backmatch resistor. DCcoupling eliminates bulky coupling capacitors.
The MAX11506 offers a flat passband while the
MAX11507 features 0.8dB peaking on the three SD-only
channels to compensate for system roll-off. The
MAX11506/MAX11507 operate from a single +5V supply
and are available in the 0°C to +70°C commercial temperature grade. The MAX11506/MAX11507 are offered in
the 16-pin QSOP package.
Applications
Cable and Satellite Set-Top Box Receivers
HDTVs
DVD Players
Personal Video Recorders
Digital Video Recorders (DVRs)
SDTVs
Video On-Demand
HD Recorders
Pin Configuration
Features
♦ Three Selectable 6th-Order 9MHz/33MHz
(SD/HD) Filters
♦ Three Fixed 5th-Order 9MHz (SD) Filters
♦ +6dB Output Buffers
♦ Transparent Input Clamp
♦ AC- or DC-Coupled Inputs
♦ AC- or DC-Coupled Outputs
♦ 0.8dB Peaking Passband Response
(MAX11507) on Three SD-Only Channels
♦ Output Buffers Drive a Standard 150Ω Video
Load
♦ Single +5V Power Supply
♦ Lead-Free 16-Pin QSOP Package
Ordering Information
PINFREQUENCY
PACKAGE RESPONSE
PART
TEMP RANGE
MAX11506CEE+
0°C to +70°C
16 QSOP
Flat
MAX11507CEE+
0°C to +70°C
16 QSOP
High
Frequency
Boost
+Denotes a lead-free package.
Typical Operating Circuit appears at end of data sheet.
Block Diagram
SDIN1
TRANSPARENT
CLAMP
6dB
SDIN2
TRANSPARENT
CLAMP
6dB
SDIN3
TRANSPARENT
CLAMP
6dB
SDOUT1
SDOUT2
SDOUT3
9MHz, 5TH ORDER
TOP VIEW
SDIN1 1
16 SDOUT1
SDIN2 2
15 SDOUT2
SDIN3 3
14 SDOUT3
VCC 4
FSEL 5
MAX11506
MAX11507
+
MAX11506
MAX11507
13 GND
SD/HDIN1
TRANSPARENT
CLAMP
6dB
SD/HDIN2
TRANSPARENT
CLAMP
6dB
SD/HDIN3
TRANSPARENT
CLAMP
6dB
12 GND
SD/HDIN1 6
11 SD/HDOUT1
SD/HDIN2 7
10 SD/HDOUT2
SD/HDIN3 8
9
SD/HDOUT3
FSEL
SD/HDOUT1
SD/HDOUT2
SD/HDOUT3
9MHz/33MHz, 6TH ORDER
QSOP
________________________________________________________________ Maxim Integrated Products
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.
1
MAX11506/MAX11507
General Description
MAX11506/MAX11507
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
ABSOLUTE MAXIMUM RATINGS
VCC to GND ............................................................. -0.3V to +6V
All Other Pins
to GND ................-0.3V to the lower of (VCC + 0.3V) and +6V
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 9.6mW/°C above +70°C)....... 771.5mW
Maximum Current into Any Pin except VCC and GND .....±50mA
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Junction Temperature ......................................................+150°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.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V, RLOAD = 150Ω to GND, CIN = 0.1µF, TA = 0°C to +70°C, unless otherwise noted.)
PARAMETER
SYMBOL
Supply Current
ICC
Supply Voltage Range
VCC
Input-Voltage Range
VIN
Digital Input High Voltage
VIH
Digital Input Low Voltage
VIL
CONDITIONS
MIN
TYP
MAX
UNITS
4.75
40
61
mA
5.00
5.25
1.4
V
V
2.0
V
0.8
V
AC ELECTRICAL CHARACTERISTICS
(VCC = +5V, RLOAD = 150Ω to GND, CIN = 0.1µF, TA = 0°C to +70°C, frequency response relative to 100kHz, unless otherwise
noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
STANDARD-DEFINITION VIDEO
MAX11506, SD
4.5
7.9
MAX11506, SD/HD in SD mode
4.5
7.9
MAX11507, SD
5.0
8.6
MAX11507, SD/HD in SD mode
4.5
MHz
-1dB Bandwidth
f1dB
-3dB Bandwidth
f3dB
Stopband Attenuation
ASB
Low-Frequency Gain
AV
No load
Differential Gain
dG
All channels
0.5
%
Differential Phase
dφ
All channels
0.2
Degrees
VOUT = 1.4VP-P, f = 1MHz (all channels)
0.1
%
Total Harmonic Distortion
Channel-to-Channel Crosstalk
THD
f = 27MHz
MHz
48
5.8
6.0
dB
6.2
dB
f = 1MHz
-60
dB
Signal-to-Noise Ratio
SNR
Peak signal (2VP-P) to RMS noise, 100kHz, 4.2MHz
71
dB
Propagation Delay
tPD
f = 4.5MHz
59
ns
DC (all channels)
45
dB
Power-Supply Rejection Ratio
2
XTALK
7.9
9.0
PSRR
_______________________________________________________________________________________
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
(VCC = +5V, RLOAD = 150Ω to GND, CIN = 0.1µF, TA = 0°C to +70°C, frequency response relative to 100kHz, unless otherwise
noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
23
30
MHz
33
MHz
HIGH-DEFINITION VIDEO
-1dB Bandwidth
f1dB
-3dB Bandwidth
f3dB
Stopband Attenuation
ASB
Low-Frequency Gain
AV
TA = +25°C
f = 37.125MHz
4.0
f = 44.250MHz
13
f = 74.250MHz, TA = +25°C
Total Harmonic Distortion
THD
Channel-to-Channel Crosstalk
XTALK
32.0
46.0
5.8
6.0
VOUT = 1.4VP-P, f = 10MHz
0.4
dB
6.2
dB
%
VOUT = 1.4VP-P, f = 15MHz
0.4
VOUT = 1.4VP-P, f = 22MHz
0.6
f = 1MHz
-60
dB
Signal-to-Noise Ratio
SNR
Peak signal (2VP-P) to RMS noise, 100kHz, 30MHz
65
dB
Group-Delay Deviation
∆tg
f = 100kHz to 26MHz
15
ns
Typical Operating Characteristics
(VCC = 5V, RL = 150Ω to GND, output DC-coupled, TA = +25°C.)
-20
-30
-40
0
NORMALIZED GAIN (dB)
2
NORMALIZED GAIN (dB)
-10
10
MAX11506 toc02
0
NORMALIZED GAIN (dB)
4
MAX11506 toc01
10
MAX11507 FREQUENCY RESPONSE
SD CHANNEL
MAX11506 PASSBAND RESPONSE
SD CHANNEL
0
-2
-4
MAX11506 toc03
MAX11506 FREQUENCY RESPONSE
SD CHANNEL
-10
-20
-30
-40
-50
-50
-6
-60
-60
NORMALIZED TO ZERO AT 100kHz
-70
-70
-8
0.1
1
10
FREQUENCY (MHz)
100
0.1
1
FREQUENCY (MHz)
10
0.1
1
10
100
FREQUENCY (MHz)
_______________________________________________________________________________________
3
MAX11506/MAX11507
AC ELECTRICAL CHARACTERISTICS (continued)
Typical Operating Characteristics (continued)
(VCC = 5V, RL = 150Ω to GND, output DC-coupled, TA = +25°C.)
-2
-4
-10
2
NORMALIZED GAIN (dB)
0
4
MAX11506 toc05
0
NORMALIZED GAIN (dB)
2
NORMALIZED GAIN (dB)
10
MAX11506 toc04
4
PASSBAND RESPONSE
SD/HD CHANNEL IN SD MODE
FREQUENCY RESPONSE
SD/HD CHANNEL IN SD MODE
-20
-30
-40
MAX11506 toc06
MAX11507 PASSBAND RESPONSE
SD CHANNEL
0
-2
-4
-50
-6
-8
NORMALIZED TO ZERO AT 100kHz
-8
-70
0.1
1
10
0.1
1
10
1
0.1
100
10
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY RESPONSE
SD/HD CHANNEL IN HD MODE
PASSBAND RESPONSE
SD/HD CHANNEL IN HD MODE
GROUP DELAY vs. FREQUENCY
SD CHANNEL
-20
-30
-40
MAX11506 toc09
2
NORMALIZED GAIN (dB)
-10
100
80
0
DELAY (ns)
0
120
MAX11506 toc08
4
MAX11506 toc07
10
NORMALIZED GAIN (dB)
-6
-60
NORMALIZED TO ZERO AT 100kHz
-2
60
40
-4
-50
NORMALIZED TO ZERO AT 100kHz
0
-8
-70
1
10
0.1
100
1
10
0.1
100
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
GROUP DELAY vs. FREQUENCY
SD/HD CHANNEL IN SD MODE
GROUP DELAY vs. FREQUENCY
SD/HD CHANNEL IN HD MODE
DIFFERENTIAL GAIN, NTSC
SD CHANNEL
90
80
35
DELAY (ns)
60
50
40
25
20
15
30
0
DIFFERENTIAL GAIN (%)
30
70
1.0
-0.1
-0.2
-0.3
-0.4
10
-0.5
10
5
-0.6
0
0
20
1
10
FREQUENCY (MHz)
100
MAX11506 toc12
40
MAX11506 toc10
100
0.1
1
FREQUENCY (MHz)
MAX11506 toc11
0.1
4
20
-6
-60
DELAY (ns)
MAX11506/MAX11507
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
-0.7
0.1
1
10
FREQUENCY (MHz)
100
1
2
3
4
STEP
_______________________________________________________________________________________
5
6
7
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
DIFFERENTIAL GAIN, NTSC
SD/HD CHANNEL IN SD MODE
0.2
0.1
0
0.5
0.4
0.3
0.2
0.1
0.4
MAX11506 toc15
0.6
DIFFERENTIAL GAIN (%)
0.3
MAX11506 toc14
0.7
MAX11506 toc13
DIFFERENTIAL PHASE (deg)
0.4
DIFFERENTIAL PHASE, NTSC
SD/HD CHANNEL IN SD MODE
DIFFERENTIAL PHASE (deg)
DIFFERENTIAL PHASE, NTSC
SD CHANNEL
0.3
0.2
0.1
0
0
-1.0
-1.0
1
2
3
4
5
6
7
-1.0
1
2
STEP
3
4
5
6
7
1
2
3
STEP
2T RESPONSE
SD CHANNEL
5
6
7
2T RESPONSE
SD/HD CHANNEL IN SD MODE
MAX11506 toc16
200ns/div
4
STEP
MAX11506 toc17
INPUT
INPUT
OUTPUT
OUTPUT
200ns/div
_______________________________________________________________________________________
5
MAX11506/MAX11507
Typical Operating Characteristics (continued)
(VCC = 5V, RL = 150Ω to GND, output DC-coupled, TA = +25°C.)
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
MAX11506/MAX11507
Pin Description
PIN
NAME
1
SDIN1
SD Video Input Channel 1
FUNCTION
2
SDIN2
SD Video Input Channel 2
3
SDIN3
4
VCC
Power-Supply Input
5
FSEL
Frequency-Select Input. SD/HD select for channels 4, 5, and 6. Force FSEL high to select HD, and
low to select SD. Do not leave unconnected.
6
SD/HDIN1
SD/HD Video Input Channel 1
7
SD/HDIN2
SD/HD Video Input Channel 2
8
SD/HDIN3
SD/HD Video Input Channel 3
9
SD/HDOUT3
SD/HD Video Output Channel 3
10
SD/HDOUT2
SD/HD Video Output Channel 2
11
SD/HDOUT1
12, 13
GND
14
SDOUT3
SD Video Output Channel 3
15
SDOUT2
SD Video Output Channel 2
16
SDOUT1
SD Video Output Channel 1
SD Video Input Channel 3
SD/HD Video Output Channel 1
Ground
Detailed Description
The MAX11506/MAX11507 integrated filters offer 6 channels, 3 for SD video and 3 for either SD or HD video and
include +6dB output buffers on each channel. Each
channel of the MAX11506/MAX11507 contains a transparent input clamp, a 9.0MHz 5th-order lowpass filter
and an output amplifier with a gain of 2V/V (see the
Typical Operating Circuit). The MAX11506 provides a flat
passband response and the MAX11507 provides a
0.8dB high-frequency boost at 5MHz on all SD-only
channels to help with system roll-off. The SD-only channels add 280mV of offset at the output.
Three channels, SD/HD1, SD/HD2, and SD/HD3 include
selectable SD and HD video filters, each with a transparent input clamp, a 6th-order lowpass filter with a -3dB
bandwidth of 9.0MHz (SD) and 33MHz (HD), and an
output amplifier with a gain of 2V/V. The SD/HD channels add 550mV of offset at the output.
The output voltage equations are:
VSDOUT = (2 x VIN) + 0.28V
VSD/HDOUT = (2 x VIN) + 0.55V
Typical voltage waveforms are shown in Figures 1 and 2.
6
Inputs
Transparent Clamps
All inputs feature transparent clamps to allow either ACor DC-coupling of the inputs. The clamp remains inactive while the input signal is above ground, offering true
DC input coupling. When the signal goes below
ground, as is the case when it is AC-coupled, the
clamp sets the sync tip close to the ground level.
Input Coupling
The choice of AC- or DC-coupling the input depends
on the video source. Many DACs have a current output
and are terminated to ground with a resistor; such signals are conveniently DC-coupled. Use AC-coupling
when the DC level of the video signal is unknown or
outside the specified input range of the MAX11506/
MAX11507, such as SCART or VCC-terminated DAC
outputs.
DC-Coupled Inputs
When the input is DC-coupled, the voltage must remain
above zero but should not exceed 1.4V (typical).
_______________________________________________________________________________________
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
MAX11506/MAX11507
2.55V HD
2.28V SD
OUTPUT SIGNAL
MAX11506
MAX11507
INPUT
OUTPUT
1.0V
1.15V HD
0.88V SD
INPUT SIGNAL
0.55V HD
0.28V SD
0.3V
0.0V
Figure 1. Typical AC-Coupled Signal
2.59V HD
2.32V SD
OUTPUT SIGNAL
MAX11506
MAX11507
1.02V
INPUT
OUTPUT
1.19V HD
0.98V SD
INPUT SIGNAL
0.32V
0.59V HD
0.32V SD
0.02V
0.00V
Figure 2. Typical DC-Coupled Signal
_______________________________________________________________________________________
7
MAX11506/MAX11507
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
AC-Coupled Inputs
When the input is AC-coupled, the transparent clamps
are active and set the lowest point of the signal at ground.
This is appropriate for unipolar signals such as CVBS, Y,
R, G, or B, with or without sync pulses (Figure 3).
For bipolar signals such as Pb and Pr, bias the AC-coupled inputs to a fixed DC voltage, typically 0.59V, to
ensure that the transparent clamp remains off. Figure 4
shows a typical network. Determine the bias voltage using:
VB =
0.1µF
INPUT
DAC
R2
x ( VAVCC − (IL x R1))
R1+ R2
where IL is the input leakage current (typically 0.5µA).
SD Filters
The MAX11506/MAX11507 filters are optimized to deliver a flat (MAX11506) or high-frequency boosted
(MAX11507) passband and high stopband attenuation.
The filter characteristic provides excellent time domain
response with low overshoot. The typical -3dB frequency of 9.0MHz guarantee minimal attenuation in the
passband, while at the same time offering a 27MHz
attenuation of typically -48dB.
HD Filters
The internal filters deliver a flat passband along with high
stopband attenuation. The filter characteristic provides
an excellent time domain response with low overshoot.
The typical -3dB frequency of 33MHz guarantees low
attenuation in the passband, while at the same time
allowing for a typical attenuation of -46dB at 74.25MHz.
Output Buffers
The MAX11506/MAX11507 feature output buffers with
+6dB gain that drive a standard 150Ω video load. A
typical load consists of a 75Ω backmatch resistor, an
optional 220µF or larger coupling capacitor, and a 75Ω
termination resistor. The offset between input and output signals ensures that the blanking level on the output
is less than 1V after the backmatch resistor, thus meeting digital TV specifications allowing the devices to
drive video loads directly without using costly AC-coupling
capacitors.
8
MAX11506
MAX11507
ENCODER
Figure 3. Simple AC-Coupling for Unipolar Signals (CVBS, Y, R,
G, B)
VCC
ENCODER
0.1µF
R1
820kΩ
MAX11506
MAX11507
INPUT
DAC
R2
120kΩ
Figure 4. AC-Coupling for Bipolar Signals (C, Pb, Pr)
Applications Information
Output Considerations
The MAX11506/MAX11507 outputs may be DC- or ACcoupled. These devices, with +6dB gain, are typically
connected to a 75Ω series backmatch resistor followed
by the video cable. Choose an AC-coupling capacitor
value that ensures that the lowest frequency content in
the video signal is passed and the field-time distortion
is kept within desired limits when using an AC connection. The selection of this value is a function of the input
impedance, and more importantly, the input leakage of
the circuit being driven. Common industry practice is to
use a 220µF or larger capacitor.
_______________________________________________________________________________________
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
for their low inductance. Place traces carrying video
signals appropriately to avoid mutual coupling. When
inputs are AC-coupled, place the capacitors as close
as possible to the device and keep traces short to minimize parasitic capacitance and inductance. Refer to
the MAX11506/MAX11507 evaluation kit datasheet for
PCB layout.
PCB Layout Recommendations
Chip Information
Connect the power and ground traces to large copper
areas to enhance power dissipation. Bypass VCC to
GND with 0.1µF and 1.0µF capacitors. Place the 0.1µF
capacitor closest to VCC. Use surface-mount capacitors
PROCESS: BiCMOS
Typical Operating Circuit
5V
10µF
0.1µF
VCC
SDIN1
Y1OUT
SDIN2
CVOUT
B/PbOUT
R/PrOUT
220µF
75Ω
220µF
75Ω
220µF
SDOUT2
SDIN3
75Ω
SDOUT3
75Ω
MAX11506
MAX11507*
DAC LOAD
RESISTORS
G/Y2OUT
75Ω
SDOUT1
75Ω
COUT
VIDEO
SoC
FSEL
SD/HDIN1
AC-COUPLING
CAPACITORS OPTIONAL
75Ω
220µF
75Ω
220µF
75Ω
220µF
75Ω VIDEO
CABLE
SD/HDOUT1
75Ω
SD/HDIN2
SD/HDOUT2
SD/HDIN3
75Ω
SD/HDOUT3
75Ω
GND
*THE MAX11507 FEATURES 0.8dB PEAKING PASSBAND RESPONSE ON THE 3 SD-ONLY CHANNELS.
_______________________________________________________________________________________
9
MAX11506/MAX11507
The MAX11506/MAX11507 outputs are fully protected
against short circuits to ground. The short-circuit protection circuitry limits the output current to 75mA (typical) per output. Shorting more than one output to
ground simultaneously may exceed the maximum
package power dissipation.
MAX11506/MAX11507
Low-Cost, 6-Channel SD Plus HD/SD
Selectable Video Filters and Buffers
Package Information
For the latest package outline information, go to www.maxim-ic.com/packages.
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
16 QSOP
E16+1
21-0055
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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