Data Sheet Comlinear CLC3800, CLC3801 ® Triple, Standard Definition Video Amplifiers The CLC3800 (6dB) and CLC3801 (9dB) are triple low cost video amplifiers capable of driving 2Vpp into 1 (150Ω), 2 (75Ω), or 3 (50Ω) video loads. The CLC3800 and CLC3801 feature integrated 8MHz, 4th-order low pass filters designed to cleanly pass standard definition video signals while filtering out noise and other unwanted signals , resulting in a crisper, cleaner video signal. The 4th-order filters provide improved image quality when compared to 2ndorder passive filtering solutions. The CLC3800 video amplifier offers a fixed gain of 6dB. This integrated gain compensates for the voltage drop inherent in properly terminated video loads; ensuring a 1Vpp video signal is present at the load. If additional gain is required, the CLC3801 video amplifier offers a fixed gain of 9dB. All three video amplifiers can be driven by DC-coupled signals. Their outputs can drive either AC- or DC-coupled loads. These video amplifiers operate from 3V to 7V supplies and consume 8.8mA of supply current, making them well suited for battery powered devices. APPLICATIONS n Cable or satellite set-top-box (STB) n Portable DVD players n DVD players n Portable media players with video out n Video on demand n Personal video recorders Competitive Comparison Plots (continued on page 11) 0.2 Competitor A Normalized Gain (dB) 0.1 Functional Block Diagram Competitor B 0 -0.1 CLC3800 -0.2 Competitor C -0.3 -0.4 Gain IN1 VOUT = 2Vpp -0.5 OUT1 0.1 1 10 Frequency (MHz) 10 Gain 8MHz, 4th Order Low Pass Filter -10 OUT3 CLC3800 - 6dB CLC3801 - 9dB CLC3802 - 12dB -20 Competitor B Competitor C -30 -40 Rev 1C IN3 0 OUT2 Normalized Gain (dB) Gain IN2 -50 -60 Competitor A VOUT = 2Vpp -70 CLC3800 -80 0.1 1 Ordering Information 10 100 Frequency (MHz) Part Number Gain Package Pb-Free RoHS Compliant Operating Temperature Range Packaging Method CLC3800ISO8X 6dB SOIC-8 Yes Yes -40°C to +125°C Reel CLC3801ISO8X† 9dB SOIC-8 Yes Yes -40°C to +125°C Reel CLC3800ILP8X* 6dB DFN-8 Yes Yes -40°C to +125°C Reel *Future product offering. †Not recommended for new design. Moisture sensitivity level for all parts is MSL-1. ©2008-2010 CADEKA Microcircuits LLC Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers General Description FEATURES n Integrated 4th-order, 8MHz filters n Integrated 6 or 9dB video drivers n 8.8mA total supply current n 0.08%/0.04˚ differential gain/phase error n DC coupled inputs n AC or DC coupled outputs n DC-coupled outputs remove the need for AC-coupling capacitors n Each channel can drive 2Vpp into 1, 2, or 3 video loads (150Ω, 75Ω or 50Ω) n 0.1% THD n Operates from 3V to 7V supplies n Pb-free SOIC-8 package www.cadeka.com Data Sheet SOIC Pin Assignments SOIC Pin Configuration 1 8 OUT1 IN2 2 7 OUT2 IN3 3 6 OUT3 +VS 4 5 GND Pin Name 1 IN1 Description Input, channel 1 2 IN2 Input, channel 2 3 IN3 Input, channel 3 4 +VS Positive supply 5 GND Ground 6 OUT3 Output, channel3 7 OUT2 Output, channel 2 8 OUT1 Output, channel 1 DFN Pin Configuration DFN Pin Configuration Pin No. Pin Name Description 1 IN1 Input, channel 1 2 IN2 Input, channel 2 OUT1 8 1 IN1 OUT2 7 2 IN2 3 IN3 Input, channel 3 4 Positive supply 3 IN3 +VS 5 GND Ground 6 OUT3 Output, channel3 7 OUT2 Output, channel 2 8 OUT1 Output, channel 1 OUT3 GND 6 4 5 Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers IN1 Pin No. +VS Bottom View DFN package: Use Pb-free solder ONLY Rev 1C ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com 2 Data Sheet Electrical Characteristics at 3V TA = 25°C, Vs = +3V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Symbol Parameter Conditions Min Typ Max Units Frequency Domain Response RL=150Ω, AC-coupled -1dB Bandwidth F-3dB -3dB Bandwidth FSB Stopband Attenuation DG DP Differential Gain Differential Phase 7.6 MHz RL=75Ω, DC-coupled 7.6 MHz RL=150Ω, AC-coupled 8.5 MHz RL=75Ω, DC-coupled 8.5 MHz at 27MHz, RL=150Ω, AC-coupled 48 dB at 27MHz, RL=75Ω, DC-coupled 48 dB NTSC (3.58MHz), AC-coupled 0.7 % NTSC (3.58MHz), DC-coupled 0.62 % NTSC (3.58MHz), DC-coupled, RL=75Ω 0.24 % NTSC (3.58MHz), AC-coupled 0.3 ° NTSC (3.58MHz), DC-coupled 0.13 ° NTSC (3.58MHz), DC-coupled, RL=75Ω 0.25 ° Time Domain Response GD Group Delay Delta delay between 400kHz and 3.58MHz 5.6 ns PD Propogation Delay Delay from input to output, 4.5MHz 65 ns VOUT = 2Vpp, 1MHz, active video range + sync 0.1 % VOUT = 1.4Vpp, 3.58MHz, active video range 0.9 % VOUT = 2Vpp, 1MHz, active video range + sync, RL=75Ω, DC-coupled 0.1 % VOUT= 1.4Vpp, 3.58MHz, active video range, RL=75Ω, DC-coupled 0.9 % NTC-7 Weighting 100kHz to 4.2MHz 77 dB 400kHz to 3.58MHz (NTSC) ±1 % 400kHz to 4.43MHz (PAL) ±1 % Channel-to-channel at 1MHz 60 dB Channel-to-channel at 1MHz, RL=75Ω, DC-coupled 58 dB Distortion/Noise Response THD SNR Total Harmonic Distortion Signal to Noise Ratio CLG Chroma / Luma Gain XTALK Crosstalk DC Performance G Gain(1) Matching(1) DC, CLC3800, RL=75Ω, DC-coupled 5.7 6.0 6.3 dB DC, CLC3801, RL=75Ω, DC-coupled 8.6 9.0 9.4 dB DC, CLC3802, RL=75Ω, DC-coupled TBD 12 TBD dB Inter-Channel Gain Output Offset Voltage(1) VIN=0V, no load Ib Input Bias Current(1) VIN=0V, no load VIN Input Voltage Range(1) Output Voltage, CLC3800(2) VO Output Voltage, CLC3801(2) Output Voltage, CLC3802(2) 400kHz, RL=75Ω, DC-coupled 230 0.08 0.2 dB 330 390 mV 1.4 5 µA CLC3800 0 to 1.25 V CLC3801 0 to 0.9 V 2.5 V VIN=1.1Vpp, RL=150Ω, AC-coupled VIN=1.1Vpp, RL=75Ω, DC-coupled(1) 2.35 VIN=1.1Vpp, RL=150Ω, AC-coupled VIN=1.1Vpp, RL=75Ω, DC-coupled(1) PSRR Power Supply Rejection Ratio DC , no load, VS = 3V to 5.5V IS Supply Current(1) No load, all 3 channels 2.66 V 2.5 2.32 VIN=1.1Vpp, RL=150Ω, AC-coupled VIN=1.1Vpp, RL=75Ω, DC-coupled(1) 2.5 2.5 V 2.69 V TBD TBD TBD V TBD V 15 mA 52 8.8 Rev 1C GMATCH VOS dB Notes: 1. 100% tested at 25°C 2. Designed to handle SD video from -40°C to +125° ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers F-1dB 3 Data Sheet Electrical Characteristics TA = 25°C, Vs = +5V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Symbol Parameter Conditions Min Typ Max Units Frequency Domain Response RL=150Ω, AC-coupled -1dB Bandwidth F-3dB -3dB Bandwidth FSB Stopband Attenuation DG DP Differential Gain Differential Phase 7.7 MHz RL=75Ω, DC-coupled 7.7 MHz RL=150Ω, AC-coupled 8.6 MHz RL=75Ω, DC-coupled 8.6 MHz at 27MHz, RL=150Ω, AC-coupled 48 dB at 27MHz, RL=75Ω, DC-coupled 48 dB NTSC (3.58MHz), AC-coupled 0.17 % NTSC (3.58MHz), DC-coupled 0.08 % NTSC (3.58MHz), DC-coupled, RL=75Ω 0.03 % NTSC (3.58MHz), AC-coupled 0.18 ° NTSC (3.58MHz), DC-coupled 0.04 ° NTSC (3.58MHz), DC-coupled, RL=75Ω 0.04 ° Time Domain Response GD Group Delay Delta delay between 400kHz and 3.58MHz 5.6 ns PD Propogation Delay Delay from input to output, 4.5MHz 65 ns VOUT= 2Vpp, 1MHz, active video range + sync 0.1 % VOUT= 1.4Vpp, 3.58MHz, active video range 0.5 % VOUT= 2Vpp, 1MHz, active video range + sync, RL=75Ω, DC-coupled 0.15 % VOUT= 1.4Vpp, 3.58MHz, active video range, RL=75Ω, DC-coupled 0.6 % NTC-7 Weighting 100kHz to 4.2MHz 77 dB 400kHz to 3.58MHz (NTSC) ±1 % 400kHz to 4.43MHz (PAL) ±1 % Channel-to-channel at 1MHz -61 dB Channel-to-channel at 1MHz, RL=75Ω, DC-coupled -58 dB Distortion/Noise Response THD SNR Total Harmonic Distortion Signal to Noise Ratio CLG Chroma / Luma Gain XTALK Crosstalk DC Performance G Gain(1) Matching(1) DC, CLC3800, RL=75Ω, DC-coupled 5.7 6.0 6.3 dB DC, CLC3801, RL=75Ω, DC-coupled 8.6 9.0 9.4 dB DC, CLC3802, RL=75Ω, DC-coupled TBD 12 TBD dB Inter-Channel Gain Output Offset Voltage(1) VIN=0V, no load Ib Input Bias Current(1) VIN=0V, no load VRIN Video Range - Input(1) Output Voltage, CLC3800(2) VO Output Voltage, CLC3801(2) Output Voltage, CLC3802(2) 400kHz, RL=75Ω, DC-coupled 230 0.08 0.2 dB 330 390 mV 1.4 5 µA CLC3800 0 to 1.1 0 to 1.4 V CLC3801 0 to 0.78 0 to 1 V 2.5 V VIN=1.1Vpp, RL=150Ω, AC-coupled VIN=1.1Vpp, RL=75Ω, DC-coupled(1) 2.35 VIN=1.1Vpp, RL=150Ω, AC-coupled VIN=1.1Vpp, RL=75Ω, DC-coupled(1) PSRR Power Supply Rejection Ratio DC, no load IS Supply Current(1) Total 2.66 V 2.5 2.32 VIN=1.1Vpp, RL=150Ω, AC-coupled VIN=1.1Vpp, RL=75Ω, DC-coupled(1) 2.5 2.5 V 2.69 V TBD TBD TBD V TBD V 53 9.5 Rev 1C GMATCH VOS dB 15 mA Notes: 1. 100% tested at 25°C 2. Designed to handle SD video from -40° to +125° ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers F-1dB 4 Data Sheet Absolute Maximum Ratings The safety of the device is not guaranteed when it is operated above the “Absolute Maximum Ratings”. The device should not be operated at these “absolute” limits. Adhere to the “Recommended Operating Conditions” for proper device function. The information contained in the Electrical Characteristics tables and Typical Performance plots reflect the operating conditions noted on the tables and plots. Supply Voltage Input Voltage Range Output Short Circuit Current Min Max Unit 0 -Vs -0.5V 14 +Vs +0.5V +110, -85 V V mA Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers Parameter Reliability Information Parameter Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10s) Package Thermal Resistance 8-Lead SOIC 8-Lead DFN Min Typ -65 Max Unit 150 150 260 °C °C °C 100 60 °C/W °C/W Notes: Package thermal resistance (qJA), JDEC standard, multi-layer test boards, still air. ESD Protection Product Human Body Model (HBM), output ESD protection Charged Device Model (CDM) SOIC-8 DFN-8 5kV 2kV TBD TBD Recommended Operating Conditions Parameter Min Operating Temperature Range Supply Voltage Range -40 3 Typ Max Unit +125 7 °C V Rev 1C ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com 5 Data Sheet Typical Performance Characteristics at V S = 5V TA = 25°C, Vs = +5V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Frequency Response (VOUT = 1Vpp) 10 0 0 -10 -10 -20 -20 Gain (dB) 10 -30 -40 -50 -30 -40 -50 -60 -60 VOUT = 0.2Vpp -70 VOUT = 1Vpp -70 0.1 1 10 100 1000 0.1 1 10 Frequency (MHz) 100 1000 Frequency (MHz) Frequency Response (VOUT = 2Vpp) Frequency Response (VOUT = 2Vpp) 10 6.1 0 6 5.9 -10 Gain (dB) Gain (dB) 5.8 -20 -30 -40 5.7 5.6 5.5 5.4 -50 5.3 -60 VOUT = 2Vpp 5.2 -70 0.1 1 10 100 5.1 1000 0.1 Frequency (MHz) 1 10 Frequency (MHz) Phase vs. Frequency Group Delay vs. Frequency 20 90 0 80 -20 70 -60 -80 -100 60 Rev 1C Delay (ns) -40 Phase (°) VOUT = 2Vpp 50 40 30 -120 -140 20 VOUT = 2Vpp -160 VOUT = 2Vpp 10 0.1 1 Frequency (MHz) ©2008-2010 CADEKA Microcircuits LLC 10 Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers Gain (dB) Frequency Response (VOUT = 0.2Vpp) 0.1 1 10 100 Frequency (MHz) www.cadeka.com 6 Data Sheet Typical Performance Characteristics at V S = 5V TA = 25°C, Vs = +5V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Noise vs. Frequency (SNR) Crosstalk vs. Frequency -30 Ch.1 <-> Ch.2 Crosstalk (dB) -50 Ch.1 <-> Ch.3 -60 -70 Ch.2 <-> Ch.3 -80 -90 VOUT = 2Vpp -100 0.1 1 10 Frequency (MHz) Differential Gainand Phase Harmonic Distortion vs. Output Voltage -30 -40 HD2 HD3 Distortion (dBc) -50 -60 -70 -80 -90 -100 f = 3.58MHz 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 Output Amplitude (Vpp) Large Signal Pulse Response 3 Large Signal Pulse Response 3 Input Rise/Fall Time = 140ns Input/Output Voltage (V) 2 2.5 Output 1.5 1 0.5 Input 0 2 1.5 1 0.5 Input 0 -0.5 -100 Input Rise/Fall Time = 1ns Output Rev 1C Input/Output Voltage (V) 2.5 -0.5 0 100 200 300 400 500 Time (ns) ©2008-2010 CADEKA Microcircuits LLC 600 700 800 900 -100 Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers -40 0 100 200 300 400 500 600 700 800 900 Time (ns) www.cadeka.com 7 Data Sheet Typical Performance Characteristics at V S = 3V TA = 25°C, Vs = +3V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Frequency Response (VOUT = 1Vpp) 10 0 0 -10 -10 -20 -20 Gain (dB) 10 -30 -40 -50 -30 -40 -50 -60 -60 VOUT = 0.2Vpp -70 VOUT = 1Vpp -70 0.1 1 10 100 1000 0.1 1 10 Frequency (MHz) Frequency Response (VOUT = 2Vpp) 6.1 6 0 5.9 -10 5.8 -20 Gain (dB) Gain (dB) 1000 Frequency Response (VOUT = 2Vpp) 10 -30 -40 5.7 5.6 5.5 5.4 -50 5.3 -60 5.2 VOUT = 0.2Vpp -70 VOUT = 0.2Vpp 5.1 0.1 1 10 100 1000 0.1 1 Frequency (MHz) 10 Frequency (MHz) Phase vs. Frequency Group Delay vs. Frequency 20 90 0 80 -20 70 -60 -80 -100 60 Rev 1C Delay (ns) -40 Phase (°) 100 Frequency (MHz) 50 40 30 -120 -140 20 VOUT = 2Vpp -160 VOUT = 2Vpp 10 0.1 1 Frequency (MHz) ©2008-2010 CADEKA Microcircuits LLC 10 Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers Gain (dB) Frequency Response (VOUT = 0.2Vpp) 0.1 1 10 100 Frequency (MHz) www.cadeka.com 8 Data Sheet Typical Performance Characteristics at V S = 3V TA = 25°C, Vs = +3V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Noise vs. Frequency (SNR) Crosstalk vs. Frequency -30 Ch.1 <-> Ch.2 Crosstalk (dB) -50 Ch.1 <-> Ch.3 -60 -70 Ch.2 <-> Ch.3 -80 -90 VOUT = 2Vpp -100 0.1 1 10 Frequency (MHz) Differential Gainand Phase Harmonic Distortion vs. Output Voltage -30 HD2 -40 HD3 Distortion (dBc) -50 -60 -70 -80 -90 -100 RL = 150Ω 0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.25 2.5 Output Amplitude (Vpp) Large Signal Pulse Response 3 Large Signal Pulse Response 3 Input Rise/Fall Time = 140ns Input/Output Voltage (V) 2 2.5 Output 1.5 1 0.5 Input 0 2 1.5 1 0.5 Input 0 -0.5 -100 Input Rise/Fall Time = 1ns Output Rev 1C Input/Output Voltage (V) 2.5 -0.5 0 100 200 300 400 500 Time (ns) ©2008-2010 CADEKA Microcircuits LLC 600 700 800 900 -100 Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers -40 0 100 200 300 400 500 600 700 800 900 Time (ns) www.cadeka.com 9 Data Sheet Typical Performance Characteristics Driving Multiple Video Loads TA = 25°C, Vs = +5V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. 1 Load = 150Ω, 2 Loads = 75Ω, 3 Loads = 50Ω, 4 Loads = 37.5Ω. Frequency Response Pulse Response 1.5 3 Loads 2 Loads 4 Loads 1.0 2 Loads -1 1 Load 0.5 -2 Output (V) Normalized Gain (dB) 0 -3 -4 0.0 -0.5 4 Loads -5 -6 -1.0 VOUT = 2V 0.2V pp pp 3 Loads -7 1 Load -1.5 0.1 1 10 0.0 0.5 Frequency (MHz) 1.0 1.5 2.0 Time (us) Differential Gain and Phase Total Harmonic Distortion Output Voltage Swing 5.0 1 Load 4.5 2 Loads 3.5 3.0 3 Loads 2.5 2.0 Rev 1C Output Voltage (V) 4.0 4 Loads 1.5 1.0 0.5 0.0 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 Input Voltage (V) ©2008-2010 CADEKA Microcircuits LLC Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers 1 www.cadeka.com 10 Data Sheet Typical Competitive Comparison Plots TA = 25°C, Vs = +5V, input is DC-coupled, input source resistance = 37.5Ω, RL = 150Ω thru a 220μF AC-coupling capacitor, VIN = 1Vpp; unless otherwise noted. Frequency Response Frequency Response 10 Competitor A 0 Competitor B -10 0 -0.1 Normalized Gain (dB) Normalized Gain (dB) 0.1 CLC3800 -0.2 Competitor C -0.3 -20 -40 -50 -60 -0.4 VOUT = 2Vpp Competitor A VOUT = 2Vpp -70 -0.5 CLC3800 -80 0.1 1 10 0.1 1 Frequency (MHz) 10 100 Frequency (MHz) Total Harmonic Distortion (RL = 150Ω) Total Harmonic Distortion (RL = 75Ω) -30 -30 -35 -35 Competitor A -40 -40 -45 Competitor B -45 Competitor B -50 THD (dB) THD (dB) Competitor B Competitor C -30 -55 -60 Competitor C -65 Competitor A -55 Competitor C -60 -65 -70 -70 CLC3800 VOUT = 2Vpp -75 -50 CLC3800 -75 -80 VOUT = 2Vpp -80 0.1 1 10 Frequency (MHz) 0.1 1 10 Frequency (MHz) Total Harmonic Distortion DC-Coupled Out (RL = 75Ω) Signal to Noise Ratio and Differential Gain/Phase -30 -35 -40 Competitor A -50 Rev 1C THD (dB) -45 -55 -60 CLC3800 Competitor C -65 -70 -75 VOUT = 2Vpp Competitor B -80 0.1 1 10 Frequency (MHz) ©2008-2010 CADEKA Microcircuits LLC Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers 0.2 www.cadeka.com 11 Data Sheet Application Information Basic Operation 2.39V Output Signal 1.02V Input Signal Inputs: DC-Coupled The inputs must be DC-coupled. Many DACs provide a current output that is resistively terminated to ground. These DACs are conveniently DC-coupled to the inputs of the CLC3800, CLC3801, or CLC3802 as shown in Figure 1. DC-coupled inputs use fewer components and lowers the overall system cost. DAC Load Resistors per Video DAC/Encoder specs 1 R or Y Video DAC/ Encoder 0.97V 2 G or PB IN1 OUT1 IN2 OUT2 8 7 CLC3800 3 B or PR IN3 OUT3 +Vs GND 6 +3V or +5V 4 1.0µF 5 0.1µF Figure 1. Typical Input Configuration 0.02V 0.00V Figure 2. Typical DC-coupled Signal for CLC3800 The input voltage range is typically 0V to 1.4V for the CLC3800 at 5V supply. Due to the internal fixed gain of 6dB (for the CLC3800) and the internal level shift of nominally 330mV, the VIN range is generally limited by the output. VIN and VOUT are fully detailed in the Electrical Characteristics section. Outputs: AC- or DC-Coupled Each channel of the CLC3800, CLC3801, and CLC3802 can drive either AC- or DC-coupled loads. Each channel can drive single or dual video loads, 150Ω (1 video load) or 75Ω (2 video loads). Figure 3 shows the typical configuration for driving either AC- or DC-coupled loads. With DC-coupled loads, AC-coupling capacitors are not used. Match the series termination resistors to the typical cable impedance, 75Ω for standard video cable. Keep the output connection to the series termination resistors as short as possible. If driving 2 video loads, place both resistors close to the CLC3800. With AC-coupled loads, use an AC-coupling capacitor of at least 220μF in a 75Ω environment. A value of at least 220μF will ensure that low frequencies are passed, preventing video droop across the line, referred to as “tilt”. The CLC380x Family of video amplifiers add a DC offset, ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com 12 Rev 1C The input termination/source resistance is set by the application. Any value up to several kΩ can be used. Lower values reduce noise, but if higher values are needed, there is little effect on filter shape or distortion performance of the CLC380x. If the CLC380x is located on the same board as the video source, and within a few inches, the input termination resistance is determined by the requirements of the Video DAC or Encoder. If a cable is needed to connect the CLC380x to the video source, the termination must match the cable impedance which is 75Ω for standard video cable. 0.35V 0.32V Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers The CLC3800, CLC3801, and CLC3802 are 3-channel video amplifiers that operate with single supply voltages from 3V to 7V. They are designed to accept DC-coupled inputs and will drive AC- or DC-coupled outputs. Each channel integrates a DC offset, 4th order Butterworth filters, and fixed gain video drivers. The filtering is appropriate for standard definition video signals and has a -3dB cutoff of 8.6MHz. This cutoff provides an excellent compromise between flat in-band response and high frequency noise reduction. The input signals are level shifted prior to the input filters and output amplifiers. raising the input signal by approximately 330mV. For example, when 0V is applied to the input, the output becomes approximately 330mV above ground. This offset eliminates sync tip clipping. Figure 2 illustrates a typical DCcoupled input signal and resulting output signal after exiting the CLC3800. Data Sheet 1 IN1 OUT1 8 75Ω 220µF 75Ω 220µF 75Ω Video Cables 75Ω 2 OUT2 IN2 7 75Ω CLC3800 3 IN3 OUT3 220µF 75Ω 6 GND +Vs 5 AC-Coupling Caps are Optional Figure 3. Typical Output Configuration Power Supply Decoupling For optimum performance, power supply decoupling is required. Figure 4 shows the recommended usage of power supply decoupling capacitors. The 0.1µF decoupling capacitor must be placed as close to pin 4 as possible, < 0.1” or < 2.5mm, to be effective. The larger, 1µF capacitor can be placed further away. 1 2 IN1 OUT1 IN2 OUT2 8 IN3 OUT3 General layout and supply bypassing play major roles in high frequency performance. CADEKA has evaluation boards to use as a guide for high frequency layout and as aid in device testing and characterization. Follow the steps below as a basis for high frequency layout: 7 +Vs GND 6 +3V or +5V 4 1.0µF 5 • Include 1µF and 0.1µF ceramic capacitors for power supply decoupling 0.1µF Figure 4. Recommended Power Supply Decoupling • Place the 6.8µF capacitor <0.75 inches of the power pin • Place the 0.1µF capacitor <0.1 inches of the power pin • Remove the ground plane near the input and output pins to reduce parasitic capacitance 2.5 • Minimize all trace lengths to reduce series inductances 2 Refer to the evaluation board layouts for more information. 1.5 SOIC-8 1 Evaluation Board Information The following evaluation boards are available to aid in the testing and layout of these devices: 0.5 0 -40 -20 0 20 40 60 80 Evaluation Board Ambient Temperature (°C) Figure 5. Maximum Power Derating ©2008-2010 CADEKA Microcircuits LLC CEB021 Products CLC3800, CLC3801 in SOIC packages www.cadeka.com 13 Rev 1C Maximum Power Dissipation (W) The CLC3800 is designed primarily for low voltage operation with supply values between 3.0V and 5.5V, but larger supplies can be used. In this situation, DC loads may not be possible due to thermal considerations. With single DC loads on all three channels and a 12V supply, the thermal rise is an additional 45° this gives a total temperature rise of about 57°. Layout Considerations CLC3800 3 When driving DC loads, the supply current is much higher than in AC applications and care must be taken to dissipate the extra heat generated. The output signal will swing from about 0.3V to 2.3V for full swing video. In the worst case condition, an all white screen with dual DC loads, the additional thermal rise over the quiescent condition is about 20°C. An easy way to help distribute this extra heat is to place a ground plane under the part and add ground plane on the bottom of the board immediately under the part with vias between the two planes. Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers 75Ω 4 Power Dissipation Considerations with DC-Coupled Loads Data Sheet Evaluation Board Schematics Evaluation board schematics and layouts are shown in Figures 9-11. Application Note AN-6 provides a detailed description of the evaluation board. Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers SHORT FOR CLC3800/CLC3801/CLC3802 Figure 11. CEB006 Bottom View Figure 9. CEB021 Schematic Figure 10. CEB021 Top View Rev 1C ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com 14 Data Sheet Typical Application Circuits DAC Load Resistors per Video DAC/Encoder specs DVD Player or STB IN1 OUT1 8 75Ω 220µF 7 75Ω 220µF 6 75Ω 220µF 75Ω Video Cables R 75Ω Video DAC/ Encoder 2 G or PB OUT2 IN2 75Ω CLC3800 3 B or PR IN3 G OUT3 B 75Ω +3V or +5V 4 1.0µF GND +Vs 5 0.1µF AC-Coupling Caps are Optional Figure 11. Typical Configuration for Component Video (RGB, YPBPR, or YUV) DAC Load Resistors per Video DAC/Encoder specs DVD Player or STB 1 Y IN1 OUT1 8 75Ω 220µF 7 75Ω 220µF 6 75Ω 220µF 75Ω 220µF 75Ω Video Cables Y 75Ω Video DAC/ Encoder 2 C OUT2 IN2 75Ω CLC3800 3 CV IN3 OUT3 CV1 75Ω +3V or +5V 4 1.0µF C +Vs GND 5 0.1µF CV2 75Ω AC-Coupling Caps are Optional Figure 11. Typical Configuration for Composite Video an extra composite output is available to drive an RF modulator Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers 1 R or Y Rev 1C ©2008-2010 CADEKA Microcircuits LLC www.cadeka.com 15 Data Sheet DAC Load Resistors per Video DAC/Encoder specs DVD Player or STB 1 Y 2 C OUT1 IN2 OUT2 75Ω 8 S-Video 7 75Ω 220µF 6 75Ω 220µF 75Ω 220µF CLC3800 3 CVBS IN3 OUT3 220µF 75Ω 75Ω Video Cables CVBS1 75Ω +3V or +5V 4 1.0µF 75Ω GND +Vs 5 75Ω Video Cables 0.1µF CVBS2 75Ω AC-Coupling Caps are Optional Figure 11. Typical Configuration for Composite (CVBS) and S-Video DAC Load Resistors per Video DAC/Encoder specs DVD Player or STB 1 R or Y IN1 OUT1 8 75Ω 220µF 7 75Ω 220µF 6 75Ω 220µF 75Ω Video Cables R 75Ω 2 G or PB OUT2 IN2 75Ω CLC3800 3 B or PR IN3 G OUT3 B 75Ω +3V or +5V Video DAC/ Encoder 4 1.0µF +Vs GND IN1 OUT1 5 0.1µF 1 Y OUT 8 75Ω 220µF 7 75Ω 220µF 6 75Ω 220µF 75Ω Video Cables Y 75Ω 2 C OUT OUT2 IN2 75Ω CLC3800 3 CV OUT IN3 OUT3 CV 75Ω +3V or +5V 4 +Vs GND 5 Rev 1C 1.0µF C 0.1µF AC-Coupling Caps are Optional Figure 11. Typical Configuration for 6-channel application ©2008-2010 CADEKA Microcircuits LLC Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers Video DAC/ Encoder IN1 www.cadeka.com 16 Data Sheet Mechanical Dimensions SOIC-8 Package Comlinear CLC3800, CLC3801 Triple, Standard Definition Video Amplifiers Rev 1C For additional information regarding our products, please visit CADEKA at: cadeka.com CADEKA Headquarters Loveland, Colorado T: 970.663.5452 T: 877.663.5452 (toll free) CADEKA, the CADEKA logo design, COMLINEAR, and the COMLINEAR logo design are trademarks or registered trademarks of CADEKA Microcircuits LLC. All other brand and product names may be trademarks of their respective companies. CADEKA reserves the right to make changes to any products and services herein at any time without notice. CADEKA does not assume any responsibility or liability arising out of the application or use of any product or service described herein, except as expressly agreed to in writing by CADEKA; nor does the purchase, lease, or use of a product or service from CADEKA convey a license under any patent rights, copyrights, trademark rights, or any other of the intellectual property rights of CADEKA or of third parties. Copyright ©2008-2010 by CADEKA Microcircuits LLC. All rights reserved.