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19-1057; Rev 0; 11/07
Four-Channel, Standard-Definition Video Filter
General Description
The MAX11504/MAX11505 integrated filters offer four channels of 5th order filters for standard-definition 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, security systems, digital video recorders (DVRs), DVD players, and personal video recorders. The MAX11504/MAX11505 video inputs feature a transparent clamp compatible with AC- and DC-coupled input signals and allow DAC outputs to be directly coupled. The 5 th order filters provide a bandwidth of 8.6MHz (typical). The MAX11504 offers a flat passband response on all channels. The MAX11505 offers a 0.8dB peaking passband response on Channel 1, resulting in a bandwidth of 8.9MHz (typical) and a flat passband response on all other channels. Each channel includes an output buffer with a gain of +6dB capable of driving a full 2VP-P video signal into two standard 150 (75 back terminated) video loads. The buffers drive either AC- or DC-coupled loads and assure a blanking level below 1V after the back-match resistor. The MAX11504/MAX11505 operate from a single +5V supply and are available in the 0C to +70C commercial temperature range. These devices are available in small 10-pin MAX(R) packages.
Features
Four-Channel 5th Order Filter for StandardDefinition Video +6dB Output Buffers Transparent Input Clamp AC- or DC-Coupled Inputs AC- or DC-Coupled Outputs Output Buffers Can Drive Two Standard 150 Video Loads 12kV HBM ESD Protection on Outputs Flat Passband Response (MAX11504) 0.8dB Peaking Passband Response on Channel 1 (MAX11505) Single +5V Power Supply Small 10-Pin MAX Package
MAX11504/MAX11505
Ordering Information
PART MAX11504CUB+ MAX11505CUB+ PINPACKAGE 10 MAX 10 MAX PACKAGE CODE U10+2 U10+2 FREQUENCY RESPONSE Flat HF Boost On Channel 1
Applications
Set-Top Box Receivers Digital Video Recorders (DVRs) Security Video Systems SDTV DVD Players Personal Video Recorders Video On-Demand
MAX is a registered trademark of Maxim Integrated Products, Inc.
Note: All devices are specified over the 0C to +70C commercial temperature range.
Simplified Block Diagram
VCC
MAX11504 MAX11505
IN1 TRANSPARENT CLAMP TRANSPARENT CLAMP 8.6MHz 8.9MHz* +6dB OUT1
Pin Configuration
TOP VIEW
IN2
8.6MHz
+6dB
OUT2
IN3 IN1 1 IN2 IN3 IN4 VCC 2 3 4 5 10 OUT1 9 OUT2 IN4 8 7 6 OUT3 OUT4 GND
TRANSPARENT CLAMP
8.6MHz
+6dB
OUT3
MAX11504 MAX11505
TRANSPARENT CLAMP
8.6MHz
+6dB
OUT4
GND *MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1
MAX
________________________________________________________________ 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.
Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505
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 = +70C) 10-Pin MAX (derate 8.8mW/C above +70C) ........707.3mW Maximum Current into Any Pin except VCC and GND......50mA Operating Temperature Range MAX1150_CUB ...................................................0C to +70C Storage Temperature Range .............................-65C to +150C Junction Temperature ......................................................+150C Lead temperature (soldering, 10s) ..................................+300C
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
(VCC = +5V, RLOAD = 150 to GND, CIN = 0.1F, TA = 0C to +70C. All frequency response is relative to 100kHz.)
PARAMETER -1dB Bandwidth -3dB Bandwidth Stopband Attenuation Low-Frequency Gain Low-Frequency Gain Matching Input Voltage Range Differential Gain Differential Phase Total Harmonic Distortion Channel-to-Channel Crosstalk Signal-to-Noise Ratio Propagation Delay Power-Supply Rejection Ratio Supply-Voltage Range Supply Current SYMBOL f1dB f3dB ASB AV AV(MATCH) VIN dG d THD XTALK SNR tpd PSRR VCC ICC No load Referenced to GND if DC-coupled All channels All channels VOUT = 1.8VP-P, f = 1MHz (All channels) f = 1MHz NTC-7 weighting, 100kHz, 4.2MHz f = 4.5MHz DC (All channels) 4.75 MAX11504 MAX11505, Channel 1 MAX11504 MAX11505, Channel 1 f = 27MHz 5.5 CONDITIONS MIN 4.5 5.0 TYP 7.2 7.8 8.6 8.9 50 6.0 0.02 1.4 0.1 0.3 0.1 -70 80 76 70 5 24 5.25 35 6.5 MAX UNIT MHz MHz dB dB dB V % degrees % dB dB ns dB V mA
2
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Four-Channel, Standard-Definition Video Filter
Typical Operating Characteristics
(VCC = 5V, RL = 150 to GND, TA = +25C)
MAX11504/MAX11505
MAX11504 FREQUENCY RESPONSE
MAX11504toc01
MAX11504 PASSBAND RESPONSE
MAX11504toc02
MAX11504 GROUP DELAY vs. FREQUENCY
MAX11504toc03
10 0 -10 RESPONSE (dB) -20 -30 -40 -50 -60 -70 0.1 1 10
10
120 100 80
5 RESPONSE (dB) DELAY (ns) 0.1 1 FREQUENCY (MHz) 10
0
60 40
-5 20 -10 100 FREQUENCY (MHz) 0 0.1 1 10 100 FREQUENCY (MHz)
MAX11504 DIFFERENTIAL GAIN, NTSC
MAX11504toc04
MAX11504 DIFFERENTIAL PHASE, NTSC
0.3 DIFFERENTIAL PHASE (deg) 0.2 0.1 0 -0.1 -0.2 -0.3
MAX11504toc05
MAX11504 2T RESPONSE
MAX11504toc06
0.2
0.4
DIFFERENTIAL GAIN (%)
0.1
IN
0
-0.1
OUT
-0.2 1 2 3 4 5 6 7
-0.4 1 2 3 4 5 6 7 200ns/div
MAX11504 12.5T RESPONSE
MAX11504toc07
MAX11504 MULTIBURST RESPONSE
MAX11504toc08
IN
IN
OUT
OUT
400ns/div
10s/div
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3
Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505
Typical Operating Characteristics (continued)
(VCC = 5V, RL = 150 to GND, TA = +25C)
MAX11505 FREQUENCY RESPONSE
MAX11504toc09
MAX11505 PASSBAND RESPONSE
MAX11504toc10
MAX11505 GROUP DELAY vs. FREQUENCY
MAX11504toc11
10 0 -10 RESPONSE (dB)
10
120 100 80 60 40
5 RESPONSE (dB) DELAY (ns) 0.1 1 FREQUENCY (MHz) 10
-20 -30 -40 -50 -60 -70 0.1 1 10 100 FREQUENCY (MHz)
0
-5 20 -10 0 0.1 1 10 100 FREQUENCY (MHz)
MAX11505 DIFFERENTIAL GAIN, NTSC
MAX11504toc12
MAX11505 DIFFERENTIAL PHASE, NTSC
0.2 DIFFERENTIAL PHASE (deg) 0.2 0.1 0 -0.1 -0.2 -0.3
MAX11504toc13
MAX11505 2T RESPONSE
MAX11504toc14
0.2
0.4
DIFFERENTIAL GAIN (%)
0.1
IN
0
-0.1
OUT
-0.2 1 2 3 4 5 6 7
-0.4 1 2 3 4 5 6 7
200ns/div
MAX11505 12.5T RESPONSE
MAX11504toc15
MAX11505 MULTIBURST RESPONSE
MAX11504toc16
IN
IN
OUT
OUT
400ns/div
10s/div
4
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Four-Channel, Standard-Definition Video Filter
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 NAME IN1 IN2 IN3 IN4 VCC GND OUT4 OUT3 OUT2 OUT1 FUNCTION Video Input Channel 1. The MAX11505 provides 0.8dB passband boost at high frequency. Video Input Channel 2 Video Input Channel 3 Video Input Channel 4 Power Supply. Bypass to ground with 0.1F and 1F capacitors. Ground Video Output Channel 4 Video Output Channel 3 Video Output Channel 2 Video Output Channel 1. The MAX11505 provides 0.8dB passband boost at high frequency.
MAX11504/MAX11505
Detailed Description
Each channel of the MAX11504/MAX11505 contains a transparent input clamp, a 5th order lowpass filter, and an output amplifier with +6dB gain (see the Functional Diagrams and Typical Operating Circuits). The 5th order lowpass filters provide a bandwidth of 8.6MHz (typical). The MAX11504 provides a flat passband response. The MAX11505 features a 0.8dB high-frequency boost on
Channel 1 to help with system rolloff (for CVBS signals) and a flat passband response on all other channels. Within the passband, each channel amplifies the signal by two and adds 280mV of offset. VOUT = (2 x VIN ) + 0.28V Typical voltage levels are shown in Figures 1 and 2.
2.28V
MAX11504 MAX11505
IN_ 1.00V 0.88V INPUT SIGNAL OUT_
OUTPUT SIGNAL
0.30V
0.28V
0V
Figure 1. Typical AC-Coupled Signal
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5
Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505
2.32V
MAX11504 MAX11505
IN_ 1.02V 0.92V INPUT SIGNAL OUT_
OUTPUT SIGNAL
0.32V 0.02V 0V
0.32V
Figure 2. Typical DC-Coupled Signal
Transparent Clamps
All inputs feature transparent clamps that allow either AC or DC input coupling. The clamp remains inactive while the input signal is above ground, offering true DC input coupling. If the signal goes below ground, as occurs when it is AC-coupled, the clamp sets the sync tip slightly below the ground level.
AC-Coupled Inputs If 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 Y, R, G or B with or without sync pulse (Figure 3).
Input Coupling
The choice of AC- or DC-coupling the input depends on the video source. Many DACs provide a current output and are terminated to ground with a resistor; such signals are conveniently DC-coupled. Use ACcoupling when the DC level of the video signal is unknown or outside the specified input range of the MAX11504/MAX11505, such as SCART or VCC-terminated DAC outputs.
MAX11504 MAX11505
0.1F DAC IN_
ENCODER
DC-Coupled Inputs If the input is DC-coupled, the input voltage must remain above zero but not exceed the maximum input voltage of 1.4V (typical).
Figure 3. Simple AC-Coupling for Unipolar Signals (Y, R, G, B).
6
_______________________________________________________________________________________
Four-Channel, Standard-Definition Video Filter
For bipolar signals such as C, Pb, and Pr, bias the ACcoupled inputs to a fixed DC voltage, typically 0.59V, to ensure that the transparent clamp remains off. A suitable network is shown in Figure 4. Determine the bias voltage using: VB = R2 (VCC - IL x R1) R1 + R2 resistor, an optional 220F or larger coupling capacitor, and a 75 termination resistor. The MAX11504/MAX11505 clamp the signal, forcing the blanking level to less than 1V at the termination resistor. This allows driving video loads to meet digital TV specifications without the need for costly AC-coupling capacitors. When driving two parallel loads per output (Figure 5b), thermal considerations must be taken into account, especially for DC-coupled outputs (see the Junction Temperature Calculations section.)
MAX11504/MAX11505
where IL = the input leakage current (typically 0.5A).
VCC
ENCODER 0.1F DAC
R1 820k IN_ R2 120k
MAX11504 MAX11505
MAX11504 MAX11505
OUT_ 75 220F (OPTIONAL) 75
(a)
Figure 4. AC-Coupling for Bipolar Signals (C, Pb, Pr)
Standard-Definition Filters
The MAX11504/MAX11505 filters are optimized to deliver a flat passband along with high stop-band attenuation. The filter characteristic has been chosen to provide an excellent time domain response with low overshoot. The typical -3dB frequency of 8.6MHz guarantees minimal attenuation in the passband while at the same time offering a 27MHz attenuation of typically -50dB. Channel 1 of the MAX11505 has 0.8dB of high-frequency boost and a -3dB frequency of 8.9MHz.
MAX11504 MAX11505
OUT_
75
220F (OPTIONAL)
75
75
220F (OPTIONAL)
75
Output Buffer
The MAX11504/MAX11505 feature output buffers with +6dB gain that drive two standard 150 video loads. A typical load (Figure 5a) is a 75 back-match
(b)
Figure 5. Typical Output Loads
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7
Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505
Applications Information
Output Configuration
The MAX11504/MAX11505 outputs may be either DCor AC-coupled. If AC-coupled, choose a capacitor that passes the lowest frequency content of the video signal, and keep the line-time distortion within desired limits. The capacitor value is a function of the input leakage and impedance of the circuit being driven. Common industry practice is to use a 220F or larger coupling capacitor. If any or all outputs are driving two parallel loads, refer to the junction temperature calculations. The MAX11504/MAX11505 outputs are fully protected against short circuits either to the ground or the positive supply of the device. The short-circuit protection circuitry limits the output current to 80mA (typical) per output. Shorting more than one output simultaneously can exceed the maximum package power dissipation. A sync tip exists at 280mV and peak white exists at 2.28V. The RMS voltage will be approximately 1.88V on each output (80% of the peak-peak voltage, plus the offset) giving: PDS = 5 x 0.024 = 0.12W (5 - 1.88) x 1.88 = 0.078W 75
PDOn = and
PD = 0.12 + 0.078 + 0.078 + 0.078 + 0.078 = 0.432W The junction temperature is given by: TJ = TA + (RJA x PD ) where TJ = junction temperature, TA = ambient temperature (assume +70C) and RJA = thermal resistance junction to ambient. From the Absolute Maximum Ratings section of the data sheet, the derating factor is 8.8mW/C above +70C. RJA = 1/(derating factor) = 1/(8.8mW/C) = 113C/W. Therefore: TJ = 70 + 113 x 0.432 = +119C If there is only one video load on each output, the junction temperature lowers to: TJ = +101C The above calculations assume the use of a multilayered board with extensive ground planes for high thermal efficiency. Using such a board is especially important in applications where there are two video loads on each channel.
Junction Temperature Calculations Die temperature is a function of quiescent power dissipation and the power dissipation in the output drivers. Calculate the power dissipated PD using:
PD = PDS + PDO1 + PDO2 + PDO3 + PDO4 where PDS is the quiescent power dissipated in the die, and given by: PDS = VCC x ICC and where PDOn is the power dissipated in the nth driver stage and given by: PDOn = (VCC - VORMSn ) x VORMSn RL
where VORMSn is the RMS output voltage and RL is the load resistance. Example - Assuming these conditions: 1. Video standard = 525/60/2:1 2. Video format = RGB with syncs on all channels 3. Picture content = 100% white 4. 5. 6. 7. The input signal is AC-coupled The output signal is DC-coupled VCC = 5.0V ICC = 24mA
8
_______________________________________________________________________________________
Four-Channel, Standard-Definition Video Filter
PCB Layout Recommendations
To help with heat dissipation, connect the power and ground traces to large copper areas. Bypass VCC to GND with a 0.1F capacitor and 1.0F capacitors. Surface-mount capacitors are recommended for their low inductance. Place traces carrying video signals appropriately to avoid mutual coupling. If inputs are AC-coupled, place the capacitors as close as possible to the device and keep the traces short to minimize parasitic capacitance and inductance.
MAX11504/MAX11505
9
_______________________________________________________________________________________
Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505
Functional Diagrams and Typical Operating Circuits
+5V RECONSTRUCTION FILTER APPLICATION 0.1F VCC 4 1F
ENCODER 0.1F* DAC 75 0.1F* DAC 75 0.1F* DAC 75 0.1F* DAC 75 IN1 1 CLAMP
MAX11504 MAX11505
8.6MHz 8.9MHz +6dB 8 OUT1 75 220F*
75 75 220F*
IN2 2
CLAMP
8.6MHz
+6dB
7 OUT2
75 75 220F*
IN3 3
CLAMP
8.6MHz
+6dB
6 OUT3
75 75 220F*
IN4 4
CLAMP
8.6MHz 5
+6dB
6 OUT4
75
GND *OPTIONAL MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1
10
______________________________________________________________________________________
Four-Channel, Standard-Definition Video Filter
Functional Diagrams and Typical Operating Circuits (continued)
MAX11504/MAX11505
+5V ANTI-ALIASING FILTER APPLICATION 0.1F VCC 4 1F
MAX11504 MAX11505
0.1F* IN1 1 CLAMP 8.6MHz 8.9MHz +6dB 8 OUT1 75
MULTICHANNEL DECODER
ADC 75
75 0.1F* 75
IN2 2
CLAMP
8.6MHz
+6dB
7 OUT2
ADC 75
75 0.1F* 75
IN3 3
CLAMP
8.6MHz
+6dB
6 OUT3
ADC 75
75 0.1F* 75
IN4 3
CLAMP
8.6MHz 5
+6dB
6 OUT4
ADC 75
75
GND *OPTIONAL MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1
Chip Information
PROCESS: BiCMOS
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11
Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505
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.)
10LUMAX.EPS
1 1
e
10
4X S
10
INCHES MAX DIM MIN 0.043 A 0.006 A1 0.002 A2 0.030 0.037 D1 0.120 0.116 0.118 D2 0.114 E1 0.116 0.120 0.118 E2 0.114 0.199 H 0.187 L 0.0157 0.0275 L1 0.037 REF b 0.007 0.0106 e 0.0197 BSC c 0.0035 0.0078 0.0196 REF S 0 6
MILLIMETERS MAX MIN 1.10 0.15 0.05 0.75 0.95 3.05 2.95 2.89 3.00 2.95 3.05 2.89 3.00 4.75 5.05 0.40 0.70 0.940 REF 0.177 0.270 0.500 BSC 0.090 0.200 0.498 REF 0 6
H
O0.500.1
0.60.1
1
1
0.60.1
TOP VIEW
BOTTOM VIEW
D2 GAGE PLANE A2 A b A1 D1
E2
c
E1 L1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, 10L uMAX/uSOP
APPROVAL DOCUMENT CONTROL NO. REV.
21-0061
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.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

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