FMS6410B

FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer October 2006 FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer Features ■ 7.1MHz fifth-order Y,C filters with composite summer ■ 50dB stopband attenuation at 27MHz on Y, C, and CV ■ ■ ■ ■ ■ ■ ■ ■ ■ Description The FMS6410B is a dual Y/C fifth-order Butterworth lowpass video filter optimized for minimum overshoot and flat group delay. The device also contains a summing circuit to generate filtered composite video. In a typical application, the Y and C input signals from DACs are AC coupled into the filters. Both channels have DC restore circuitry to clamp the DC input levels during video sync. The Y and C channels use separate feedback clamps. The clamp pulse is derived from the Y channel. All outputs are capable of driving 2Vpp, AC or DC coupled, into either a single or dual video load. A single video load consists of a series 75Ω impedance matching resistor connected to a terminated 75Ω line. This presents a total of 150Ω of loading to the part. A dual load is two of these in parallel, which presents a total of 75Ω to the part. The gain of the Y, C, and CV signals is 6dB with 1Vpp input levels. All video channels are clamped during sync to establish the appropriate output voltage reference levels. outputs Better than 0.1dB flatness to 4.5MHz on Y, C, and CV outputs No external frequency selection components or clocks < 5ns group delay on Y, C, and CV outputs AC-coupled inputs AC- or DC-coupled outputs Capable of PAL frequency selection components or clocks 0.3% differential gain with 0.2° differential phase on Y, C, and CV channels Integrated DC restore circuitry with low tilt Lead-free SOIC-8 package Applications ■ Cable and satellite set-top boxes ■ DVD players ■ Personal Video Recorders (PVR) ■ Video On Demand (VOD) Block Diagrams VCC 7 Sync Strip Reference and Timing YIN 1 6dB 8 YOUT gM 250mV + Σ + 6 CVOUT gM 250mV CIN 4 6dB 5 COUT 3 GND Figure 1. Block Diagram © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer Ordering Information Part Number FMS6410BCS FMS6410BCSX Package SOIC-8 SOIC-8 Operating Temperature Range 0°C to 70°C 0°C to 70°C Pb-Free Yes Yes Container Rail Reel Pack Qty. 95 2500 Pin Configuration FAIRCHILD Y IN NC GND C IN 1 8 Y OUT V CC CV OUT C OUT FMS6410B 2 7 8L SOIC 3 4 6 5 Figure 2. Pin Configuration Pin Assignments Pin# 1 2 3 4 5 6 7 8 Pin YIN NC GND CIN COUT CVOUT VCC YOUT Type Input Description Luminance (luma) input: This pin is typically connected to the luma or composite video output pin from the external video encoder. No connect. Must be tied to ground. Chrominance (chroma) Input: This pin is typically connected to the chroma output pin from the external video encoder. Filtered chrominance video output from the CIN channel. Composite video output: This pin is the sum of YOUT and COUT. +5V supply. Filtered luminance output from the YIN channel. Input Input Output Output Input Output Typical Application Diagram FMS6410B may also be DC-Coupled 0.1µF YIN 1 YIN YOUT 8 75 220µF YOUT 75 FMS6410B CVOUT 6 75 220µF To TV 75 0.1µF CIN 4 75 CIN COUT VCC GND 7 3 75 5 220µF CVOUT to VCR 75 5V 0.1µF 220µF COUT 75 10µF Figure 3. AC- or DC-Coupled Application Diagram © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 2 www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer Absolute Maximum Ratings The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions for actual device operation. Parameter DC Supply Voltage Analog and Digital I/O Output Current Any One Channel, Do Not Exceed Min. -0.3 -0.3 Max. 6.0 Vcc + 0.3 40 Unit V V mA Reliability Information Symbol TJ TSTG TL ΘJA Junction Temperature Storage Temperature Range Lead Temperature (Soldering, 10s) Thermal Resistance, JEDEC Standard Multi-Layer Test Boards, Still Air 115 -65 Parameter Min. Typ. Max. 150 150 300 Unit °C °C °C °C/W Recommended Operating Conditions Symbol TA VCC Supply Voltage Range Parameter Operating Temperature Range Min. 0 4.75 Typ. 5.00 Max. 70 5.25 Unit °C V © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 3 www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer DC Electrical Characteristics TA = 25°C, VCC = 5V, VIN = 1Vpp; all inputs are AC coupled with 0.1µF; all outputs are AC coupled with 220µF into 150Ω loads; referenced to 400kHz; unless otherwise noted. Symbol ICC VIN PSRR Supply Parameter Current(1) No Load Input Voltage Maximum Power Supply Rejection Ratio Conditions Min. Typ. 50 1.4 60 Max. 60 Unit mA Vpp dB All Channels, DC Notes: 1. 100% tested at 25°C. AC Electrical Characteristics TA = 25°C, VCC = 5V, VIN = 1Vpp; all inputs are AC coupled with 0.1µF; all outputs are AC coupled with 220µF into 150Ω loads; referenced to 400kHz; unless otherwise noted. Symbol AV Csync Ysync CVsync tCLAMP fFLAT fC fSB dG dP THD XTALK SNR tpd GD tSKEW tCLGCV tCLDCV Channel Parameter Gain(1) sync)(1) Conditions All Channels Sync Present on YIN (after 6dB gain) Sync Present on YIN (after 6dB gain) Y Channel, Settled to within 10mV All Channels All Channels All Channels at 27MHz All Channels All Channels VOUT = 1.4Vpp, 3.58MHz at 3.58MHz All Channels, NTC-7 weighting, 4.2MHz LP, 100kHz HP All Channels All Channels at 3.58MHz at 1MHz f = 3.58MHz (Ref. to YIN at 400kHz) f = 3.58MHz (Ref. to YIN at 400kHz) Min. 5.75 Typ. 6.00 1.0 0.35 0.35 10 0 Max. 6.25 1.3 0.50 0.50 Unit dB V V V ms dB MHz dB % deg % dB dB ns ns ns COUT Output Level (during sync)(1) Sync Present on YIN (after 6dB gain) YOUT Output Level (during CVOUT Output Level (during sync)(1) Clamp Response Time Gain Flatness to 4.5MHz -3dB Bandwidth(1) Attenuation(1) Stopband 6.7 42 7.1 50 0.3 0.2 0.3 -50 82 115 4 0 Differential Gain Differential Phase Output Distortion Crosstalk Signal-to-Noise Ratio Propagation Delay Group Delay Deviation Skew Between YOUT and COUT Chroma-Luma Gain CVOUT(1) Chroma-Luma Delay CVOUT 96 100 4 104 % ns Notes: 1. 100% tested at 25°C. © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 4 www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer Applications Information Functional Description This product is a two-channel, monolithic, continuoustime, video filter designed for reconstructing the luminance and chrominance signals from an S-Video D/A source. Composite video output is generated by summing the Y and C outputs. The chip is designed to have AC-coupled inputs and work with either AC- or DC-coupled outputs. The reconstruction filters provide a fifth-order Butterworth response with group delay equalization. This provides a maximally flat response in terms of delay and amplitude. Each of the three outputs is capable of driving 2Vpp into a 75Ω load. All channels are clamped during the sync interval to set the appropriate minimum output DC level. With this operation, the effective input time constant is greatly reduced, which allows use of small, low-cost coupling capacitors. The net effect is that the input settles to 10mV in 10ms for any DC shifts present in the input video signal. In most applications, the input coupling capacitors are 0.1µF. The Y and C inputs typically sink 1µA of current during active video, which normally tilts a horizontal line by 2mV at the Y output. During sync, the clamp restores this leakage current by sourcing an average of 20µA over the clamp interval. Any change in the coupling capacitor values affect the amount of tilt per line. Any reduction in tilt comes with an increase in settling time. Layout Considerations General layout and supply bypassing play major roles in high-frequency performance and thermal characteristics. Fairchild offers a demonstration board, FMS6410BDEMO, to guide layout and aid device testing and characterization. The FMS6410BDEMO is a fourlayer board with a full power and ground plane. For optimum results, follow the steps below as a basis for highfrequency layout: ■ Include 10μF and 0.1μF ceramic bypass capacitors. ■ Place the 10μF capacitor within 0.75 inches of the power pin. ■ Place the 0.1μF capacitor within 0.1 inches of the power pin. ■ If using DC-coupled outputs, use a large ground plane to help dissipate heat. ■ Minimize all trace lengths to reduce series inductances. Output Interface To obtain the highest quality output signal, place the series termination resistor as close to the device output pin as possible. This greatly reduces the parasitic capacitance and inductance effect on the output of the driver. Place the series termination resistor less than 0.1 inches from the device pin, as shown in Figure 4. Luminance (Y) I/O The typical luma input is driven by either a low-impedance source of 1Vpp or the output of a 75Ω terminated line driven by the output of a current DAC. In either case, the input must be capacitively coupled to allow the syncdetect and DC-restore circuitry to operate properly. All outputs are capable of driving 2Vpp, AC or DC coupled, into either a single or dual video load. A single video load consists of a series 75Ω impedance matching resistor connected to a terminated 75Ω line, presenting a total of 150Ω of loading to the part. A dual load is two of these in parallel, which presents a total of 75Ω to the part. The gain of the Y, C, and CV signals is 6dB with 1Vpp input levels. Figure 4. 75Ω Series Resistor 0.1 Inches from Pin Figure 5 is the schematic representation of a video filter/ driver used in a system as the output driver to a media device. In this case, the composite video signal is terminated by the media device and the S-video output terminations are open. It is very critical to have the series termination resistors close to the output pins of the device to minimize the effects of parasitic capacitance on the filter output driver which may show up as noise on the CV output. Chrominance (C) I/O The chrominance input can be driven in the same manner as the luminance input, but is typically only a 0.7Vpp signal. Since the chrominance signal doesn't contain any DC content, the output signal can be AC coupled using a capacitor as small as 0.1µF if DC coupling is not desired. Composite Video (CV) Output The composite video output driver is same as the other outputs. © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 5 www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer Applications Information (Continued) Fairchild Filter Drive r 75 Ohm Clamp / Bias LPF Buf Series Termanatio n Resisto r 0.1 inche s from DUT pin + Filter/Driver set for gain of 2 X S-Video 75 Ohm RC A JACK 3 1 4 2 Coax ADC 75 Ohm Summe r Series Termanatio n Resisto r 0.1 inche s from DUT pin + Media Fairchild Filter Drive r 75 Ohm Clamp / Bias LPF Buf Series Termanatio n Resisto r 0.1 inche s from DUT pin Filter/Driver set for gain of 2 X Figure 5. Schematic Representation of a Video Filter / Driver © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 6 + www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer Physical Dimensions Figure 6. 8-Lead Small Outline Integrated Circuit (SOIC) Package © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 7 www.fairchildsemi.com FMS6410B Dual-Channel Video Drivers with Integrated Filters and Composite Video Summer www.fairchildsemi.com © 2004 Fairchild Semiconductor Corporation FMS6410B Rev. 1.0.2 8