19-3790; Rev 1; 9/05 Single-Channel Video Reconstruction Filters and Buffers Features The MAX7462/MAX7463 single-channel, standard-definition, integrated video reconstruction filters and buffers are ideal for anti-aliasing and digital-to-analog smoothing video applications or wherever analog video is reconstructed from digital data (such as cable/satellite/terrestrial set-top boxes and DVRs). The MAX7462 includes a disable function, which places the output in a high-impedance state allowing multiplexing of multiple output signals. It also has an external gain control that sets the output buffer gain to either +6dB or +9.5dB. The higher gain setting allows a lower DAC output signal than the standard 1VP-P signal. The MAX7463 output buffer has a fixed gain of +6dB. The MAX7462/MAX7463 operate from a single +5V supply and have a flat passband out to 5MHz with a stopband attenuation of -43dB (typ) at 27MHz. ♦ Standard-Definition CVBS Video Reconstruction Filters and Buffers ♦ Passband: -0.05dB at 5MHz ♦ Stopband: -43dB at 27MHz ♦ Selectable Gain: +6dB and +9.5dB (MAX7462) ♦ Output Disable (MAX7462) ♦ Drives 2VP-P into Two 150Ω Video Loads ♦ Output Black Level < 1V for DC-Coupled Output ♦ Very Small µMAX and SO Packages Ordering Information PART These devices can drive two standard 150Ω AC-coupled or DC-coupled video loads. The output black level of the MAX7462/MAX7463 is less than 1V for DC-coupled outputs. The MAX7462 is available in an 8-pin µMAX® package and an 8-pin SO package. The MAX7463 is available in an 8-pin SO package. All devices are specified over the 0°C to +85°C temperature range. PINPACKAGE BUFFER GAIN (dB) OUTPUT DISABLE MAX7462UUA* 8 µMAX +6/+9.5 selectable Yes MAX7462USA 8 SO +6/+9.5 selectable Yes MAX7463USA 8 SO +6 fixed No Note: All parts are specified over the 0°C to +85°C temperature range. *Future product—contact factory for availability. Applications Cable/Satellite/Terrestrial Set-Top Boxes Pin Configurations appear at end of data sheet. DVRs Hard-Disk Recorders Functional Diagram +5V VCC MAX7462 0.1µF DAC 75Ω * ZO = 75Ω 220µF IN LOWPASS FILTER +6dB/+9.5dB OUT 75Ω 75Ω * ZO = 75Ω 220µF 75Ω GND GAIN DISABLE *OPTIONAL µMAX is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ 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. 1 MAX7462/MAX7463 General Description MAX7462/MAX7463 Single-Channel Video Reconstruction Filters and Buffers ABSOLUTE MAXIMUM RATINGS VCC to GND ........................................................................+6.0V All Other Pins to GND ...-0.3V to the lower of (VCC + 0.3V) and +6V Maximum Current into Any Pin Except VCC and GND .....±50mA Continuous Power Dissipation (TA = +70°C) 8-Pin µMAX (derate 4.5mW/°C above +70°C) …...... 362mW 8-Pin SO (derate 5.9mW/°C above +70°C) .......... 470.6mW Operating Temperature Range...............................0°C to +85°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 (VCC = +5V ±5%, CL = 0 to 20pF, RL = 75Ω, CIN = 0.1µF, gain = +6dB, DISABLE = VCC (MAX7462), TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, and TA = +25°C.) PARAMETER CONDITIONS Passband Response f = 100kHz to 5MHz, relative to 100kHz Stopband Attenuation f ≥ 27MHz Output Dynamic Swing Gain = GND (MAX7462) Output Sync Tip Clamp Level After termination (Note 1) MIN TYP MAX UNITS -0.65 -0.05 +0.65 dB 2.0 2.4 VP-P 0.45 0.55 V 39 0.30 43 dB Group Delay Deviation f = 100kHz to 4.2MHz Differential Gain Five-step modulated staircase 0.15 11 % Differential Phase Five-step modulated staircase 0.15 Degrees Signal-to-Noise Ratio Output signal (2VP-P) to RMS noise (100Hz to 5MHz) Low-Frequency Gain Accuracy f =100kHz, relative to a gain of +6dB Line Time Distortion 18µs, 100 IRE bar 0.1 Field Time Distortion 130 lines, 18µs, 100 IRE bar 0.1 % Power-Supply Rejection Ratio VIN = 100mVP-P, f = 100kHz 35 dB Supply Current No load 25 75 -3 dB +3 Note 1: Measured after 75Ω back-match resistor. Assume a 75Ω termination resistor. 2 ns _______________________________________________________________________________________ % % 35 mA Single-Channel Video Reconstruction Filters and Buffers MAX7462/63 toc02 MAX7462/63 toc01 2.0 1.5 1.0 AMPLITUDE (dB) AMPLITUDE (dB) 0 -20 -40 0.5 0 -0.5 -1.0 -60 -1.5 NORMALIZED TO 0dB NORMALIZED TO 0dB -2.0 -80 0.1 1 10 0.1 100 PHASE RESPONSE vs. FREQUENCY GROUP DELAY vs. FREQUENCY 150 90 GROUP DELAY (ns) 100 MAX7462/63 toc04 100 MAX7462/63 toc03 200 PHASE (DEGREES) 10 1 FREQUENCY (MHz) FREQUENCY (MHz) 50 0 -50 80 70 -100 60 -150 -200 50 0.1 1 10 0.1 FREQUENCY (MHz) 2T RESPONSE MODULATED 12.5T RESPONSE MAX7462/63 toc05 MAX7462/63 toc06 OUT 250mV/div OUT 250mV/div IN 250mV/div IN 250mV/div 200ns/div 10 1 FREQUENCY (MHz) 200ns/div _______________________________________________________________________________________ 3 MAX7462/MAX7463 Typical Operating Characteristics (VCC = +5V ±5%, CL = 0 to 20pF, RL = 75Ω, CIN = 0.1µF, gain = +6dB, DISABLE = VCC (MAX7462), TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, and TA = +25°C.) PASSBAND AMPLITUDE vs. FREQUENCY AMPLITUDE vs. FREQUENCY Typical Operating Characteristics (continued) (VCC = +5V ±5%, CL = 0 to 20pF, RL = 75Ω, CIN = 0.1µF, gain = +6dB, DISABLE = VCC (MAX7462), TA =TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, and TA = +25°C.) SUPPLY CURRENT vs. TEMPERATURE VIN = +2V NO LOAD DIFFERENTIAL PHASE (deg) 30 20 10 0 17 34 51 68 85 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 MAX7462/63 toc08 DIFFERENTIAL GAIN (%) DIFFERENTIAL GAIN MAX7462/63 toc07 40 SUPPLY CURRENT (mA) MAX7462/MAX7463 Single-Channel Video Reconstruction Filters and Buffers 1 2 3 4 5 6 7 6 7 DIFFERENTIAL PHASE 0.6 0.4 0.2 0 -0.2 -0.4 -0.6 1 2 3 4 5 TEMPERATURE (°C) OUT RESPONSE TO A FIELD SQUARE WAVE MULTIBURST RESPONSE MAX7462/63 toc10 MAX7462/63 toc09 OUT 250mV/div OUT 500mV/div IN 250mV/div IN 500mV/div 2ms/div 10µs/div DISABLE TURN-OFF TIME DISABLE TURN-ON TIME MAX7462/63 toc12 MAX7462/63 toc11 OUT 1V/div OUT 1V/div GND GND DISABLE 2V/div DISABLE 2V/div GND GND 100ns/div 4 100ns/div _______________________________________________________________________________________ Single-Channel Video Reconstruction Filters and Buffers PIN NAME FUNCTION MAX7462 MAX7463 1 1 IN 2 — GAIN 3, 4, 5 3 GND Ground — 2, 4, 5, 6 N.C. No Connection. Not internally connected. Connect to GND for better performance. 6 — DISABLE 7 7 VCC +5V Supply Input 8 8 OUT Buffer Output. This output can be either AC- or DC-coupled. Use at minimum a 220µF capacitor for AC-coupled loads. Video Input. AC-couple IN with a series 0.1µF capacitor. Gain Control Input. Connect GAIN to GND for a gain of +6dB (+2V/V). Connect GAIN to VCC for a gain of +9.5dB (+3V/V). Disable Input. Connect to VCC to enable the output buffer (normal operation). Connect to GND to put the output buffer in a high-impedance state. Detailed Description The MAX7462/MAX7463 filters and buffers the analog CVBS video outputs of DAC video-encoders in applications such as set-top boxes, hard-disk recorders, DVD players, and digital VCRs. The MAX7462/MAX7463 consist of a lowpass filter and an output video buffer that can drive two standard 150Ω video loads. These devices operate from a single +5V supply and have a bandwidth optimized for interlaced NTSC, PAL, and SDTV. Filter The reconstruction filter is a 4th-order Butterworth-type response that features a maximally flat passband for NTSC and PAL bandwidths. The stopband attenuation is optimized for a video-encoder DAC sampling frequency of 27MHz (see the Typical Operating Characteristics). Output Buffer The output buffer can drive two 150Ω video loads with a 2VP-P signal. For the MAX7462, the output buffer gain is selectable between +6dB and +9.5dB by using GAIN (see Table 1). The MAX7463 has a fixed gain of +6dB. The MAX7462/MAX7463 can drive an AC load or drive the video load directly without using a large output Table 1. Gain Setting Control (MAX7462) GAIN BUFFER GAIN (dB) GND +6 VCC +9.5 capacitor. The output buffer can drive DC loads while maintaining an output blanking level of less than 1V. The blanking level allows the MAX7462/MAX7463 to meet the digital TV interface specifications for DC coupling. Applications Information Input Considerations Use a 0.1µF ceramic capacitor to AC-couple the input. The input capacitor stores a DC voltage so that the output is clamped to the appropriate DC voltage level. Output Considerations The outputs are typically connected to a 75Ω series back-match resistor followed by the video cable. Because of the inherent divide-by-two of this configuration, the blanking level on the video cable is always less than 1V, complying with industry-standard video requirements such as the digital TV standard (which allows up to 1VDC on the video cable) and the European SCART standard (which allows up to 2VDC on the video cable). The video buffer can also drive an AC-coupled video load. Good video performance is achieved with an output capacitor as low as 220µF. Power-Supply Bypassing and Layout The MAX7462/MAX7463 operate from a single +5V supply. Bypass VCC to GND with a 0.1µF capacitor. In addition, it is sometimes advantageous to connect a 10µF capacitor within the general vicinity of the video circuitry. Place all other external components as close to the device as possible. _______________________________________________________________________________________ 5 MAX7462/MAX7463 Pin Description Single-Channel Video Reconstruction Filters and Buffers MAX7462/MAX7463 Pin Configurations Chip Information PROCESS: BiCMOS TOP VIEW IN 1 8 OUT 7 VCC 3 6 DISABLE GND 4 5 GND 8 OUT 7 VCC 3 6 N.C. N.C. 4 5 N.C. GAIN 2 MAX7462 GND µMAX/SO IN 1 N.C. 2 MAX7463 GND SO 6 _______________________________________________________________________________________ Single-Channel Video Reconstruction Filters and Buffers E Ø0.50±0.1 8 INCHES DIM A A1 A2 b H c D e E H 0.6±0.1 1 L 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6° 0° 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0° 6° 0.5250 BSC TOP VIEW A1 A2 A α c e b FRONT VIEW L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 _______________________________________________________________________________________ 7 MAX7462/MAX7463 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.) 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.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS MAX7462/MAX7463 Single-Channel Video Reconstruction Filters and Buffers 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D C A B e 0∞-8∞ A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Boblet Printed USA is a registered trademark of Maxim Integrated Products, Inc.