19-1057; Rev 0; 11/07 Four-Channel, Standard-Definition Video Filter 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 150Ω (75Ω 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 0°C to +70°C commercial temperature range. These devices are available in small 10-pin µMAX® packages. Applications Features ♦ Four-Channel 5th Order Filter for Standard♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ Definition Video +6dB Output Buffers Transparent Input Clamp AC- or DC-Coupled Inputs AC- or DC-Coupled Outputs Output Buffers Can Drive Two Standard 150Ω 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 µMAX Package Ordering Information Pin Configuration PACKAGE CODE FREQUENCY RESPONSE MAX11504CUB+ 10 µMAX U10+2 Flat MAX11505CUB+ 10 µMAX U10+2 HF Boost On Channel 1 Note: All devices are specified over the 0°C to +70°C commercial temperature range. Simplified Block Diagram Set-Top Box Receivers Digital Video Recorders (DVRs) Security Video Systems SDTV DVD Players Personal Video Recorders Video On-Demand µMAX is a registered trademark of Maxim Integrated Products, Inc. PINPACKAGE PART VCC MAX11504 MAX11505 IN1 TRANSPARENT CLAMP 8.6MHz 8.9MHz* +6dB OUT1 IN2 TRANSPARENT CLAMP 8.6MHz +6dB OUT2 IN3 TRANSPARENT CLAMP 8.6MHz +6dB OUT3 IN4 TRANSPARENT CLAMP 8.6MHz +6dB OUT4 TOP VIEW IN1 1 IN2 10 OUT1 2 MAX11504 MAX11505 9 OUT2 8 OUT3 IN3 3 IN4 4 7 OUT4 VCC 5 6 GND µMAX GND *MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1 ________________________________________________________________ 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 MAX11504/MAX11505 General Description MAX11504/MAX11505 Four-Channel, Standard-Definition Video Filter 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) 10-Pin µMAX (derate 8.8mW/°C above +70°C) ........707.3mW Maximum Current into Any Pin except VCC and GND......±50mA Operating Temperature Range MAX1150_CUB ...................................................0°C to +70°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+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 (VCC = +5V, RLOAD = 150Ω to GND, CIN = 0.1µF, TA = 0°C to +70°C. All frequency response is relative to 100kHz.) PARAMETER SYMBOL -1dB Bandwidth f1dB -3dB Bandwidth f3dB Stopband Attenuation ASB Low-Frequency Gain Low-Frequency Gain Matching CONDITIONS MIN TYP MAX11504 4.5 7.2 MAX11505, Channel 1 5.0 7.8 MAX11504 8.6 MAX11505, Channel 1 8.9 f = 27MHz 50 AV 5.5 AV(MATCH) UNIT MHz MHz dB 6.5 dB 0.02 dB 1.4 V Input Voltage Range VIN Differential Gain dG All channels 0.1 % Differential Phase dφ All channels 0.3 degrees VOUT = 1.8VP-P, f = 1MHz (All channels) 0.1 % f = 1MHz -70 dB NTC-7 weighting, 100kHz, 4.2MHz 80 dB f = 4.5MHz 76 ns Total Harmonic Distortion Channel-to-Channel Crosstalk Signal-to-Noise Ratio Propagation Delay Power-Supply Rejection Ratio THD XTALK SNR tpd PSRR Supply-Voltage Range VCC Supply Current ICC 2 Referenced to GND if DC-coupled 6.0 MAX DC (All channels) 70 4.75 No load dB 5 5.25 V 24 35 mA _______________________________________________________________________________________ Four-Channel, Standard-Definition Video Filter MAX11504 FREQUENCY RESPONSE 100 5 -10 -30 -40 DELAY (ns) 80 RESPONSE (dB) -20 0 60 40 -5 -50 20 -60 -10 -70 1 0.1 10 0 0.1 100 1 MAX11504 DIFFERENTIAL GAIN, NTSC 0.1 0 -0.1 0.1 1 10 100 FREQUENCY (MHz) MAX11504 DIFFERENTIAL PHASE, NTSC MAX11504 2T RESPONSE MAX11504toc06 MAX11504toc05 0.4 0.3 DIFFERENTIAL PHASE (deg) MAX11504toc04 0.2 10 FREQUENCY (MHz) FREQUENCY (MHz) DIFFERENTIAL GAIN (%) MAX11504toc03 0 120 MAX11504toc02 10 MAX11504toc01 10 RESPONSE (dB) MAX11504 GROUP DELAY vs. FREQUENCY MAX11504 PASSBAND RESPONSE IN 0.2 0.1 0 -0.1 OUT -0.2 -0.3 -0.4 -0.2 1 2 3 4 5 6 1 7 2 3 4 5 6 200ns/div 7 MAX11504 MULTIBURST RESPONSE MAX11504 12.5T RESPONSE MAX11504toc08 MAX11504toc07 400ns/div IN IN OUT OUT 10µs/div _______________________________________________________________________________________ 3 MAX11504/MAX11505 Typical Operating Characteristics (VCC = 5V, RL = 150Ω to GND, TA = +25°C) Typical Operating Characteristics (continued) (VCC = 5V, RL = 150Ω to GND, TA = +25°C) MAX11504toc11 0 120 MAX11504toc10 10 MAX11504toc09 10 100 RESPONSE (dB) -20 -30 -40 DELAY (ns) 5 -10 RESPONSE (dB) MAX11505 GROUP DELAY vs. FREQUENCY MAX11505 PASSBAND RESPONSE MAX11505 FREQUENCY RESPONSE 0 80 60 40 -5 -50 20 -60 -10 -70 0.1 1 10 0 0.1 100 1 MAX11505 DIFFERENTIAL GAIN, NTSC 0.1 0 -0.1 0.1 1 10 MAX11505 DIFFERENTIAL PHASE, NTSC MAX11505 2T RESPONSE MAX11504toc13 MAX11504toc14 0.2 IN 0.2 0.1 0 -0.1 OUT -0.2 -0.3 -0.2 -0.4 1 2 3 4 5 6 7 1 2 3 4 5 6 200ns/div 7 MAX11505 MULTIBURST RESPONSE MAX11505 12.5T RESPONSE MAX11504toc16 MAX11504toc15 400ns/div 4 100 FREQUENCY (MHz) 0.4 DIFFERENTIAL PHASE (deg) MAX11504toc12 0.2 10 FREQUENCY (MHz) FREQUENCY (MHz) DIFFERENTIAL GAIN (%) MAX11504/MAX11505 Four-Channel, Standard-Definition Video Filter IN IN OUT OUT 10µs/div _______________________________________________________________________________________ Four-Channel, Standard-Definition Video Filter PIN NAME 1 IN1 Video Input Channel 1. The MAX11505 provides 0.8dB passband boost at high frequency. FUNCTION 2 IN2 Video Input Channel 2 3 IN3 Video Input Channel 3 4 IN4 Video Input Channel 4 5 VCC Power Supply. Bypass to ground with 0.1µF and 1µF capacitors. 6 GND Ground 7 OUT4 Video Output Channel 4 8 OUT3 Video Output Channel 3 9 OUT2 Video Output Channel 2 10 OUT1 Video Output Channel 1. The MAX11505 provides 0.8dB passband boost at high frequency. 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 × VIN ) + 0.28V Typical voltage levels are shown in Figures 1 and 2. 2.28V OUTPUT SIGNAL MAX11504 MAX11505 IN_ OUT_ 1.00V 0.88V INPUT SIGNAL 0.30V 0.28V 0V Figure 1. Typical AC-Coupled Signal _______________________________________________________________________________________ 5 MAX11504/MAX11505 Pin Description MAX11504/MAX11505 Four-Channel, Standard-Definition Video Filter 2.32V OUTPUT SIGNAL MAX11504 MAX11505 IN_ OUT_ 1.02V 0.92V INPUT SIGNAL 0.32V 0.32V 0.02V 0V 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 ENCODER 0.1µF DAC IN_ 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 VB = R2 (VCC − IL × R1) R1 + R2 where IL = the input leakage current (typically 0.5µA). resistor, an optional 220µF or larger coupling capacitor, and a 75Ω 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.) VCC MAX11504 MAX11505 R1 820kΩ ENCODER MAX11504 MAX11505 0.1µF OUT_ IN_ DAC 75Ω 220µF (OPTIONAL) R2 120kΩ 75Ω (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. 75Ω MAX11504 MAX11505 220µF (OPTIONAL) 75Ω OUT_ 75Ω 220µF (OPTIONAL) 75Ω Output Buffer The MAX11504/MAX11505 feature output buffers with +6dB gain that drive two standard 150Ω video loads. A typical load (Figure 5a) is a 75Ω back-match (b) Figure 5. Typical Output Loads _______________________________________________________________________________________ 7 MAX11504/MAX11505 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: MAX11504/MAX11505 Four-Channel, Standard-Definition Video Filter 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 220µF 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. 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 × ICC and where PDOn is the power dissipated in the nth driver stage and given by: PDOn = (VCC − VORMSn ) × 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 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 × 0.024 = 0.12W PDOn = (5 − 1.88) × 1.88 = 0.078W 75 and PD = 0.12 + 0.078 + 0.078 + 0.078 + 0.078 = 0.432W The junction temperature is given by: TJ = TA + (RθJA × PD ) where TJ = junction temperature, TA = ambient temperature (assume +70°C) and RθJA = thermal resistance junction to ambient. From the Absolute Maximum Ratings section of the data sheet, the derating factor is 8.8mW/°C above +70°C. RθJA = 1/(derating factor) = 1/(8.8mW/°C) = 113°C/W. Therefore: TJ = 70 + 113 × 0.432 = +119°C If there is only one video load on each output, the junction temperature lowers to: TJ = +101°C 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. 2. Video format = RGB with syncs on all channels 3. Picture content = 100% white 4. 5. 6. 7. 8 The input signal is AC-coupled The output signal is DC-coupled VCC = 5.0V ICC = 24mA _______________________________________________________________________________________ Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505 PCB Layout Recommendations To help with heat dissipation, connect the power and ground traces to large copper areas. Bypass VCC to GND with a 0.1µF capacitor and 1.0µF 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. _______________________________________________________________________________________ 9 Four-Channel, Standard-Definition Video Filter MAX11504/MAX11505 Functional Diagrams and Typical Operating Circuits +5V RECONSTRUCTION FILTER APPLICATION 0.1µF 1µF VCC 4 MAX11504 MAX11505 ENCODER 0.1µF* DAC IN1 1 CLAMP 8.6MHz 8.9MHz✝ +6dB 8 OUT1 75Ω 220µF* 75Ω 75Ω 0.1µF* DAC IN2 2 CLAMP 8.6MHz +6dB 7 OUT2 75Ω 220µF* 75Ω 0.1µF* DAC 75Ω IN3 3 CLAMP 8.6MHz +6dB 6 OUT3 75Ω 220µF* 75Ω 75Ω 0.1µF* DAC IN4 4 75Ω CLAMP 8.6MHz +6dB 6 OUT4 75Ω 220µF* 5 GND *OPTIONAL ✝MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1 10 ______________________________________________________________________________________ 75Ω Four-Channel, Standard-Definition Video Filter +5V ANTI-ALIASING FILTER APPLICATION 0.1µF 1µF VCC 4 MULTICHANNEL DECODER MAX11504 MAX11505 0.1µF* IN1 1 CLAMP 8.6MHz 8.9MHz✝ +6dB 8 OUT1 75Ω ADC 75Ω 75Ω 0.1µF* IN2 2 CLAMP 8.6MHz +6dB 7 OUT2 75Ω ADC 75Ω 75Ω 0.1µF* IN3 3 8.6MHz CLAMP +6dB 6 OUT3 75Ω ADC 75Ω 75Ω 0.1µF* IN4 3 CLAMP 8.6MHz 75Ω 5 +6dB 6 OUT4 75Ω ADC 75Ω GND *OPTIONAL ✝MAX11505 WITH 0.8dB PEAKING ON CHANNEL 1 Chip Information PROCESS: BiCMOS ______________________________________________________________________________________ 11 MAX11504/MAX11505 Functional Diagrams and Typical Operating Circuits (continued) 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.) e 10LUMAX.EPS MAX11504/MAX11505 Four-Channel, Standard-Definition Video Filter 4X S 10 10 INCHES H Ø0.50±0.1 0.6±0.1 1 1 0.6±0.1 BOTTOM VIEW TOP VIEW D2 MILLIMETERS 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 α 0° 6° 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° E2 GAGE PLANE A2 c A b A1 α E1 L D1 FRONT VIEW L1 SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 10L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0061 REV. 1 1 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 © 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.