FMS6141S5X

FMS6141 Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Features  Single 4th-Order 8 MHz (SD) Filter  Drives Single, AC- or DC-coupled, Video Loads (2 Vpp, 150 Ω)  Drives Dual, AC- or DC-coupled, Video Loads (2Vpp, 75Ω)     Transparent Input Clamping    Single Supply AC- or DC-Coupled Input AC- or DC-Coupled Output DC-Coupled Output Eliminates AC-Coupling Capacitors Description The FMS6141 Low-Cost Video Filter is intended to replace passive LC filters and drivers with a low-cost integrated device. The 4th-order filter provides improved image quality compared to typical 2nd or 3rd-order passive solutions. The FMS6141 may be directly driven by a DC-coupled DAC output or an AC-coupled signal. Internal diode clamps and bias circuitry may be used if an AC-coupled input is required (see Application Information for details). The FMS6141’s output can drive an AC- or DC-coupled single (150 Ω) or dual (75 Ω) load. DC-coupling the output removes the need for output coupling capacitors. The input DC level is offset approximately +280 mV at the output (see Application Information for details). Robust 8 kV ESD Protection Lead-Free Packages: SOIC-8 or SC70-5 Applications  Cable Set-Top Boxes  Satellite Set-Top Boxes  DVD Players  HDTVs  Personal Video Recorders (PVR)  Video On Demand (VOD) Related Applications Notes  AN-6041 PCB Layout Considerations for Video Filter / Drivers  AN-6024 FMS6xxx Product Series Understanding Analog Video Signal Clamps, Bias, DC-Restore, and AC or DC Coupling Methods Functional Block Diagram VIDEOIN Transparent Clamp 2X VIDEO T OU 8MHz, 4th-order Figure 1. Block Diagram © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 www.fairchildsemi.com FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver November 2012 Part Number Operating Temperature Range FMS6141CSX -40°C to +85°C 8-Lead, Small Outline Integrated Circuit (SOIC) Tape and Reel FMS6141S5X -40°C to +85°C 5- Lead SC70 Package Tape and Reel Packing Method Package Pin Configurations VIN 1 N/C 2 GND 3 N/C 4 FMS6141 SOIC-8 8 VOUT 7 VCC GND 1 6 N/C GND 2 5 N/C SC70 Pin# 1 3 Name Description VIN Video Input N/C No Connect GND Must Be Connected to Ground 4 N/C No Connect 5 N/C No Connect 6 N/C No Connect 2 3 1, 2 7 5 VCC +5V Supply, Do Not Float 8 4 VOUT Filtered Video Output © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 4 VOUT Figure 3. SC70 Pin Definitions SOIC Pin # VCC FMS6141 SC70-5 VIN 3 Figure 2. SOIC-8 5 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Ordering Information www.fairchildsemi.com 2 Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Symbol Parameter Min. Max. Unit VCC DC Supply Voltage -0.3 6.0 V VIO Analog and Digital I/O -0.3 VCC +0.3 V IOUT Output Current, Do Not Exceed 50 mA Recommended Operating Conditions Symbol Parameter Min. TA Operating Temperature Range -40 VCC VCC Range 4.75 Typ. 5.00 Max. Unit 85 °C 5.25 V ESD Information Symbol ESD Parameter Value Unit Human Body Model, JESD22-A114 8.0 kV Charged Device Model, JESD22-C101 1.5 kV Reliability Information Symbol TJ TSTG TL ΘJA Parameter Min. Typ. Junction Temperature Storage Temperature Range -65 Lead Temperature (Soldering, 10 s) Thermal Resistance (JEDEC Standard Multi-Layer Test Boards, Still Air) © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 Max. Unit +150 °C +150 °C 300 °C SOIC-8 115 °C/W SC70-5 332 °C/W FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Absolute Maximum Ratings www.fairchildsemi.com 3 TA = 25°C, VCC = 5.0 V, RS = 37.5 Ω; input is AC coupled with 0.1 µF; output is AC coupled with 220 µF into a 150 Ω load; unless otherwise noted. Symbol ICC VIN PSRR Parameter Supply Current (1) Conditions Min. No Load Typ. Max. Unit 7 12 mA Video Input Voltage Range Referenced to GND if DCCoupled 1.4 Vpp Power Supply Rejection Ratio DC 40 dB Note: 1. 100% tested at 25°C AC Electrical Specifications TA = 25°C, VCC = 5.0 V, RS = 37.5 Ω; input is AC coupled with 0.1 µF; output is AC coupled with 220 µF into a 150 Ω load; unless otherwise noted. Symbol AV f1dB Parameter Conditions (2) Channel Gain (2) -1dB Bandwidth Min. Typ. Max. Unit 5.6 6.0 6.4 dB 4.0 6.5 MHz 7.7 MHz 42 dB fC -3dB Bandwidth fSB Attenuation (Stopband Reject) dG Differential Gain 0.4 % dφ Differential Phase 0.4 ° THD SNR tpd f = 27 MHz Output Distortion (all channels) VOUT = 1.8 Vpp, 1 MHz 0.4 % Signal-to-Noise Ratio NTC-7 Weighting; 100 kHz to 4.2 MHz 75 dB Propagation Delay Delay from input to output, 4.5 MHz 55 ns Note: 2. 100% tested at 25°C © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver DC Specifications www.fairchildsemi.com 4 Input Considerations Output Considerations The FMS6141 Low-Cost Video Filter provides 6 dB (2X) gain from input to output. The device provides an internal diode clamp to support AC-coupled input signals. In this configuration, a 0.1 µF ceramic capacitor is used to AC couple the input signal. If the input signal does not go below ground, the clamp is inactive; but if the input signal goes below ground, the clamp circuitry sets the bottom of the sync tip (or lowest voltage) to just below ground. The input level set by the clamp, combined with the internal DC offset, keeps the output signal within an acceptable range. This clamp feature also allows the FMS6141’s input to be directly driven (DC-coupled) by a ground referenced DAC output. Figure 4 shows typical DC voltage levels for the input and output signals when driven by a DC-coupled DAC output or an AC-coupled and clamped Y, CV signal. The FMS6141 outputs will be DC offset from the input by 150 mv therefore VOUT = 2*VIN DC+150 mv. This offset is required to obtain optimal performance from the output driver and is held at the minimum value in order to decrease the standing DC current into the load. Since the FMS6141 has a 2x (6 dB) gain, the output is typically connected via a 75 Ω series back-matching resistor followed by the 75 Ω video cable. Because of the inherent divide by two of this configuration, the blanking level at the load of the video signal is always less then 1 V. When AC-coupling the output ensure that the coupling capacitor of choice will pass the lowest frequency content in the video signal and that line time distortion (video tilt) is kept as low as possible. 1.0 -> 1.02V 2.28V 0.65 -> 0.67V 1.58V 0.3 -> 0.32V 0.0 -> 0.02V Vin 0.88V 0.28V The selection of the coupling capacitor is a function of the subsequent circuit input impedance and the leakage current of the input being driven. In order to obtain the highest quality output video signal the series termination resistor must be placed as close to the device output pin as possible. This greatly reduces the parasitic capacitance and inductance effect on the FMS6141 output driver. Recommend distance from device pin to place series termination resistor should be no greater than 0.1 inches. Vout Figure 4. Typical DC Voltage Levels Figure 5. Distance from Device Pin to Series Termination Resistor © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Application Information www.fairchildsemi.com 5 signal. The coupling capacitor and the input termination resistor at the input of the filter/driver should be placed close to the input pin for optimal signal integrity. Figure 6 shows a typical AC-coupled input configuration for driving the filter/driver. Using this configuration, a 0.1 µF ceramic capacitor is used to AC couple the input 0.1µF Clamp / Bias Input RTERM Buf LPF Termination & coupling close to device input Figure 6. Typical Input Configuration 75Ω 75Ω Video Cables 75Ω 0.65V Driver YIN YOUT LOAD2 (optional) 75Ω 75Ω 800 K ohms Figure 7. Conceptual Illustration — Input Clamp Circuit and Output Driver Connected to Drive Single or Dual Video Loads 0V - 1.4V LCVF Clamp Mode DVD SoC LOAD1 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver I/O Configurations 75 RTERM Figure 8. DC-Coupled Input and DC-Coupled Output © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 www.fairchildsemi.com 6 0V - 1.4V 75 LCVF Clamp Mode DVD SoC RTERM Figure 9. AC-Coupled Input and DC-Coupled Output 0V - 1.4V LCVF Clamp Mode DVD SoC 75 220µF RTERM Figure 10. DC-Coupled Input and AC-Coupled Output 0.1µ 0V - 1.4V LCVF Clamp Mode DVD SoC 75 220µF FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver 0.1µ RTERM Figure 11. AC-Coupled Input and AC-Coupled Output © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 www.fairchildsemi.com 7 General layout and supply bypassing play a major role in high-frequency performance and thermal characteristics. Fairchild offers a demonstration board for the FMS6141 to guide layout and aid device evaluation. The demo board is a four-layer board with full power and ground planes. Following this layout configuration provides optimum performance and thermal characteristics for the device. For the best results, follow the steps and recommended routing rules listed below. how much power each device dissipates. Ensure that devices of high power are not placed in the same location, such as directly above (top plane) and below (bottom plane) each other on the PCB. Recommended Routing/Layout Rules  Consider PCB Thermal Layout Considerations  Understand the system power requirements and environmental conditions.  Maximize thermal performance of the PCB.  Make the PCB as thin as possible by reducing FR4 thickness.  Use separate analog and digital power planes to supply power.  Traces  Use vias in power pad to tie adjacent layers together. should run on top of the ground plane at all times.  Remember that baseline temperature is a function of board area, not copper thickness.  No trace should run over ground/power splits.  Modeling techniques approximation.  Avoid routing at 90-degree angles.  Minimize clock differences. using 70 µm of copper for high-power designs.  Do not run analog and digital signals in parallel. and video data trace provide a first-order length Power Dissipation  Include Consider the FMS6141’s output drive configuration when calculating overall power dissipation. Care must be taken not to exceed the maximum die junction temperature. The following example can be used to calculate the FMS6141’s power dissipation and internal temperature rise. 10 µF and 0.1 µF ceramic power supply bypass capacitors.  Place the 0.1 µF capacitor within 0.1 inches of the device power pin.  Place the 10 µF capacitor within 0.75 inches of the device power pin. TJ = TA + PCHANNEL ΘJA where PCHANNEL = VCC • ICH + (VO2/RL) VO = 2VIN + 0.280V ICH = ICC + (VO/RL) VIN = RMS value of input signal ICC = 7mA VS = 5V RL = channel load resistance  For multilayer boards, use a large ground plane to help dissipate heat.  For two-layer boards, use a ground plane that extends beyond the device body by at least 0.5 inches on all sides. Include a metal paddle under the device on the top layer. The FMS6141 is specified to operate with output currents typically less than 50 mA, which is more than sufficient for a dual (75 Ω) video load. The internal amplifiers of the FMS6141 are current limited to a maximum of 100 mA and can withstand a brief-duration short-circuit condition, but this capability is not guaranteed.  Minimize all trace lengths to reduce series inductance. Thermal Considerations Since the interior of most systems, such as set-top boxes, TVs, and DVD players are at +70ºC; consideration must be given to providing an adequate heat sink for the device package for maximum heat dissipation. When designing a system board, determine © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 can FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Layout Considerations www.fairchildsemi.com 8 5.00 4.80 A 0.65 3.81 8 5 B 6.20 5.80 1.75 4.00 3.80 1 PIN ONE INDICATOR 5.60 4 1.27 (0.33) 0.25 M 1.27 C B A LAND PATTERN RECOMMENDATION 0.25 0.10 SEE DETAIL A 1.75 MAX R0.10 0.10 0.51 0.33 0.50 x 45° 0.25 C OPTION A - BEVEL EDGE GAGE PLANE R0.10 8° 0° 0.90 0.406 0.25 0.19 C 0.36 OPTION B - NO BEVEL EDGE NOTES: UNLESS OTHERWISE SPECIFIED SEATING PLANE (1.04) DETAIL A SCALE: 2:1 A) THIS PACKAGE CONFORMS TO JEDEC MS-012, VARIATION AA, ISSUE C, B) ALL DIMENSIONS ARE IN MILLIMETERS. C) DIMENSIONS DO NOT INCLUDE MOLD FLASH OR BURRS. D) LANDPATTERN STANDARD: SOIC127P600X175-8M. E) DRAWING FILENAME: M08AREV13 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Physical Dimensions Figure 12. SOIC-8 Package Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 www.fairchildsemi.com 9 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver Physical Dimensions (Continued) Figure 13. SC70-5 Package Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3 www.fairchildsemi.com 10 FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver 11 www.fairchildsemi.com © 2006 Fairchild Semiconductor Corporation FMS6141 Rev. 1.0.3