FMS6141 FAIRCHILD | Alldatasheet
Document overview
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Technical content
Features
Single 4th-Order 8MHz (SD) Filter Drives Single, AC- or DC-coupled, Video Loads (2Vpp, 150Ω) Drives Dual, AC- or DC-coupled, Video Loads (2Vpp, 75 Ω) Transparent Input Clamping AC- or DC-Coupled Input AC- or DC-Coupled Output DC-Coupled Output Eliminates AC-Coupling Capacitors Single Supply Robust 10kV 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)
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 out put coupling capacitors. The input DC level is offs et approximately +280mV at the output (see Application Information for details). 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 Figure 1. FMS6141 Block Diagram
FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6141 Rev. 1.0.0 2
Ordering Information
Part Number Package Pb-Free Operating Temperature Range Packing Method FMS6141CS SOIC-8 Yes -40°C to +85°C Tube FMS6141CSX SOIC-8 Yes -40°C to +85°C Tape and Reel FMS6141S5X SC70-5 Yes -40°C to +85°C Tape and Reel Pin Configurations VIN VOUT N/C N/C GND VCC N/C N/C FMS6141 SOIC-8 GND V CC1 FMS6141 SC70-5 GND VIN VOUT Figure 2. FMS6141 SOIC-8 Figure 3. FMS6141 SC70
1 V IN Video input
2 N/C No connect
3 GND Must be connected to ground
4 N/C No connect
5 N/C No connect
6 N/C No connect
7 V CC +5V supply, do not float
8 V OUT Filtered video output
Table 1. SOIC Pin Definitions
1 GND Must be connected to ground
2 GND Must be connected to ground
3 V IN Video input
4 V OUT Filtered video output
5 V CC +5V supply, do not float
Table 2. SC70 Pin Definitions
FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6141 Rev. 1.0.0 3 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 t hese limits. The parametric va lues defined in the Electric al Characteristics tables are not guaranteed at t he absolute maximum ratings. The “Recommended Operating Conditions” table defines the conditions for actual device operation. Parameter Min. Max. Unit DC Supply Voltage -0.3 6.0 V Analog and Digital I/O -0.3 V CC +0.3 V Output Current, Do Not Exceed 50 mA Recommended Operating Conditions Parameter Min. Typ. Max. Unit Operating Temperature Range -40 85 °C VCC Range 4.75 5.0 5.25 V ESD Information Human Body Model (HBM) 8 10 kV Charge Device Model (CDM) 2 2 kV Reliability Information Symbol Parameter Min. Typ. Max. Unit TJ Junction Temperature 150 °C TSTG Storage Temperature Range -65 150 °C TL Lead Temperature (Soldering, 10s) 300 °C SOIC-8 115 °C/W ΘJA Thermal Resistance (JEDEC Standard Multi-Layer Test Boards, Still Air) SC70-5 332 °C/W
FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6141 Rev. 1.0.0 4 DC Specifications TA = 25°C, V CC = 5.0V, R S = 37.5 Ω; input is AC coupled with 0.1µF; output is AC coupled with 220µF into a 150 Ω load; unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Unit ICC Supply Current (1) No load 7 12 mA VIN Video Input Voltage Range Referenced to GND if DC- coupled 1.4 V pp PSRR Power Supply Rejection Ratio DC 40 dB Note: 1. 100% tested at 25°C. TA = 25°C, V CC = 5.0V, R S = 37.5 Ω; input is AC coupled with 0.1µF; output is AC coupled with 220µF into a 150 Ω load; unless otherwise noted. Symbol Parameter Conditions Min. Typ. Max. Unit AV Channel Gain (1) 5.6 6.0 6.4 dB f1dB -1dB Bandwidth (1) 4.0 6.5 MHz fC -3dB Bandwidth 7.7 MHz fSB Attenuation (Stopband Reject) f = 27MHz 42 dB dG Differential Gain 0.4 % dφ Differential Phase 0.4 ° THD Output Distortion (all channels) V OUT = 1.8Vpp, 1MHz 0.4 % SNR Signal-to-Noise Ratio NTC-7 weighting; 100kHz to 4.2MHz 75 dB tpd Propagation Delay Delay from input to output, 4.5MHz 55 ns Note: 1. 100% tested at 25°C.
close to the input pin for optimal signal integrity. Figure 6. Typical Input Configuration
800 K ohms
Figure 7. Conceptual Illustration — Input Clamp Circuit and Output Driver Figure 8. DC-Coupled Input and DC-Coupled Output
75 LCVF
Figure 9. AC-Coupled Input and DC-Coupled Output Figure 10. DC-Coupled Input and AC-Coupled Output Figure 11. AC-Coupled Input and AC-Coupled Output
FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6141 Rev. 1.0.0 8 Layout Considerations 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 fo r the device. For the best results, follow the steps and recommended routing rules listed below. Recommended Routing/Layout Rules Do not run analog and digital signals in parallel. Use separate analog and digital power planes to supply power. Traces should run on top of the ground plane at all times. No trace should run over ground/power splits. Avoid routing at 90-degree angles. Minimize clock and video data trace length differences. Include 10µF and 0.1µF ceramic power supply bypass capacitors. Place the 0.1µF capacitor wi thin 0.1 inches of the device power pin. Place the 10µF capacitor wi thin 0.75 inches of the device power pin. 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. Minimize all trace lengths to reduce series inductance. Thermal Considerations Since the interior of most systems, such as set-top boxes, TVs, and DVD play ers are at +70ºC; consideration must be gi ven to providing an adequate heat sink for the device package for maximum heat dissipation. When designing a system board, determine 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. PCB Thermal Layout Considerations Understand the system power requirements and environmental conditions. Maximize thermal performance of the PCB. Consider using 70µm of copper for high-power designs. Make the PCB as thin as possible by reducing FR4 thickness. Use vias in power pad to tie adjacent layers together. Remember that baseline tem perature is a function of board area, not copper thickness. Modeling techniques can provide a first-order approximation. Power Dissipation Consider the FMS6141’s out put drive configuration when calculating overall power dissipation. Care must be taken not to exceed the maximum die junction temperature. The followi ng example can be used to calculate the FMS6141’s power dissipation and internal temperature rise. T J = TA + PCHANNEL ΘJA where PCHANNEL = VCC • ICH + (VO 2/RL) VO = 2VIN + 0.280V ICH = ICC + (VO/RL) VIN = RMS value of input signal ICC = 7mA VS = 5V RL = channel load resistance The FMS6141 is specified to operate with output currents typically less than 50mA, 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 100mA and can wi thstand a brief-duration short-circuit condition, but this capability is not guaranteed.
Dimensions are in millimeters unless otherwise noted. Figure 12. SOIC-8 Package
Dimensions are in millimeters unless otherwise noted. Figure 13. SC70-5 Package
FMS6141 — Low-Cost, Single-Channel 4th-Order Standard Definition Video Filter Driver © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FMS6141 Rev. 1.0.0 11 TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. ACEx™ GlobalOptoisolator ™ OCXPro ™ μSerDes™ TinyBuck ™ ActiveArray™ GTO ™ OPTOLOGIC SILENT SWITCHER TinyLogic Bottomless™ HiSeC ™ OPTOPLANAR ™ SMART START ™ TINYOPTO ™ Build it Now™ I C™ PACMAN ™ SPM ™ TinyPower ™ CoolFET™ i-Lo™ POP ™ Stealth ™ TinyPWM ™ CROSSVOLT™ ImpliedDisconnect ™ Power247 ™ SuperFET ™ TruTranslation ™ DOME™ IntelliMAX ™ PowerEdge ™ SuperSOT ™-3 UHC EcoSPARK™ ISOPLANAR ™ PowerSaver ™ SuperSOT ™-6 UltraFET E CMOS™ LittleFET ™ PowerTrench SuperSOT™-8 UniFET ™ EnSigna™ MICROCOUPLER ™ QFET SyncFET™ VCX ™ FACT MicroFET™ QS ™ TCM ™ Wire ™ FACT Quiet Series™ MicroPak ™ QT Optoelectronics ™ TinyBoost ™ FAST MICROWIRE™ Quiet Series ™ FASTr™ MSX ™ RapidConfigure ™ Across the board. Around the world. ™ FPS™ MSXPro ™ RapidConnect ™ Programmable Active Droop ™ FRFET™ OCX ™ ScalarPump ™ The Power Franchise DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Product Status Definition Advance Information Formative or In Design This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. Preliminary First Production This datasheet contains preliminary data; supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. No Identification Needed Full Production This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. Obsolete Not In Production This datas heet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only. Rev. I21