SM5301BS

SM5301BS 3-channel Video Buffer with Built-in Wideband Filters with Filter Through Function OVERVIEW The SM5301BS is a video filter LSI with buffered outputs for VESA-standard ATSC digital TV. The filter employs a 5-order Butterworth lowpass filter configuration. The filter characteristics have been optimized for minimal overshoot and flat group delay, it has a variable cutoff frequency and guaranteed output buffer-stage channel gain difference and phase difference values. It has also filter through mode. FEATURES I I PINOUT (Top view) I I I I I I I I I Supply voltage: 5V ± 10% VESA-standard ATSC digital TV RGB/YUV video filters RGB/YUV switching multiplexer function Synctip clamp input 0dB, 6dB gain switching function (input-to-output AC signal gain) Channel-to-channel gain difference: 0.5dB (± 5% supply voltage variation) Channel-to-channel phase difference: 3.5 degree Output signal harmonic distortion (all channels): 1.5% Cutoff frequency: 5 to 37MHz variable Filter through mode (passband frequency is 46MHz, when gain is 6dB) Package: 28-pin HSOP (Pb free) GINA/UINA GSG1 GINB/UINB NC BINA/VINA GSB1 BINB/VINB GND 1 2 3 4 5 6 7 28 27 26 25 24 23 22 NC RINB/YINB GSR1 RINA/YINA VCC4 THROUGH MUXSEL GND NC DISABLE GND3 BOUT/VOUT VCC3 GND2 GOUT/UOUT 8 9 10 11 12 13 14 21 20 19 18 17 16 15 VFC RFC GND4 VCC1 ROUT/YOUT GND1 VCC2 APPLICATIONS I I I Set-top boxes Digital television DVD players ORDERING INFORMATION Device SM5301BS Package 28-pin HSOP PACKAGE DIMENSIONS (Unit: mm) + 0.1 0.15 – 0.0 5 7.5 ± 0.2 9.9 ± 0.3 18.6 ± 0.3 2.2 ± 0.1 1.3TYP 0 to 10 0.8 5.15 0.10 0.35 ± 0.05 0.12 M SEIKO NPC CORPORATION —1 0.1 ± 0.05 0.5 ± 0.2 SM5301BS BLOCK DIAGRAM VCC1 VCC2 VCC3 VCC4 DISABLE Buffer RINA/YINA MUX RINB/YINB LPF ROUT/YOUT GSR1 Buffer GINA/UINA MUX GINB/UINB LPF GOUT/UOUT GSG1 Buffer BINA/VINA MUX BINB/VINB MUXSEL LPF BOUT/VOUT GSB1 RFC IFC Control THROUGH VFC GND1 GND2 GND3 GND4 Note. Power supply pin distinction VCC1, GND1: R/Y block VCC2, GND2: G/U block VCC3, GND3: B/V block VCC4, GND4: IFCCONT block, and logic input control block SEIKO NPC CORPORATION —2 SM5301BS PIN DESCRIPTION Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Name GINA/UINA GSG1 GINB/UINB NC BINA/VINA GSB1 BINB/VINB NC DISABLE GND3 BOUT/VOUT VCC3 GND2 GOUT/UOUT VCC2 GND1 ROUT/YOUT VCC1 GND4 RFC VFC MUXSEL I/O1 I Ipu I − I Ipu I − Ipd − O − − O − − O − − − I Ipd Analog GINA or UINA signal input GOUT/UOUT output buffer gain set input Analog GINB or UINB signal input No connection (leave open or connect to ground) Analog BINA or VINA signal input BOUT/VOUT output buffer gain set input Analog BINB or VINB signal input No connection (leave open or connect to ground) Power save function L: Enable H: Disable (Output pins: ROUT/YOUT, GOUT/UOUT, and BOUT/VOUT are high impedance.) Analog ground B/V signal output Analog 5V supply Analog ground G/U signal output Analog 5V supply Analog ground R/Y signal output Analog 5V supply Analog ground LPF (lowpass filter) cutoff frequency setting resistor connection LPF (lowpass filter) cutoff frequency setting voltage input Input select signal L: ×INA pin select H: ×INB pin select Filter mode select pin L: Filter mode H: Filter through mode Analog 5V supply Analog RINA or YINA signal input ROUT/YOUT output buffer gain set input Analog RINB or YINB signal input No connection (leave open or connect to ground) Description 23 24 25 26 27 28 THROUGH VCC4 RINA/YINA GSR1 RINB/YINB NC Ipd − I Ipu I − 1. I: input pin, Ipd: input pin with pull-down resistor, Ipu: input pin with pull-up resistor, o: output pin SEIKO NPC CORPORATION —3 SM5301BS SPECIFICATIONS Absolute Maximum Ratings Parameter Supply voltage range Supply voltage deviation1 Storage temperature range Power dissipation 12 Power dissipation 23 Junction temperature Symbol VCC ∆VCC Tstg PD1 PD2 Tj Rating − 0.3 to 7.0 ± 0.1 − 55 to + 125 1.0 0.9 125 Unit V V °C W W °C 1. Supply voltage deviation of each power supply pin. Supply the power to VCC1 to VCC4 pin, simultaneously. 2. When mounted on a substrate: mounted on a 111 × 80 × 1.6mm glass-epoxy substrate with 90% copper (Cu) wiring factor, 0m/s air flow, θjc = 52°C/W, and Ta = – 25 to 70 °C. 3. When mounted on a substrate: mounted on a 111 × 80 × 1.6mm glass-epoxy substrate with 90% copper (Cu) wiring factor, 0m/s air flow, θjc = 52°C/W, and Ta = 70 to 80 °C. Recommended Operating Conditions Parameter Supply voltage range Operating ambient temperature Symbol VCC Ta Rating 4.5 to 5.5 – 25 to 85 Unit V °C SEIKO NPC CORPORATION —4 SM5301BS Electrical Characteristics Input and Output Characteristics VCC = 4.5 to 5.5V, Ta = – 25 to 85°C unless otherwise noted. Refer to “Measurement Circuit”. Rating Parameter Symbol Condition min Supply current 1 Supply current 2 Supply current 3 Output gain error 1 Output gain error 2 Maximum output voltage DISABLE-mode input impedance (pull-down) Clamp response time Maximum input amplitude Maximum overshoot Maximum load capacitance Output drive load Channel-to-channel gain difference Channel-to-channel phase difference Output harmonic distortion Power supply rejection ratio Output short-circuit current Logic HIGH-level input voltage 1 Logic LOW-level input voltage 1 Logic HIGH-level input voltage 2 Logic LOW-level input voltage 2 Logic pull-up resistance Logic pull-down resistance ICC1 ICC2 ICC3 ∆AV1 ∆AV2 Vout RIN1 Tclamp VI VOS CL RL dG VCC = 5.5V, RFC = 820Ω to GND, VFC = 0.2V, DISABLE = "L" VCC = 5.5V, RFC = 820Ω to GND, VFC = 1.6V, DISABLE = "L" VCC = 5.5V, RFC = 820Ω to GND, VFC = 0.2V, DISABLE = "H" Gain = 0dB/6dB, VCC = 4.75 to 5.25V, Ta = 0 to 70°C Gain = 0dB/6dB, Ta = – 25 to 85°C RL = 75Ω to GND, Gain = 6dB RINA/YINA, RINB/YINB, GINA/UINA, GINB/UINB, BINA/VINA, BINB/VINB Time for 90% output signal change for 10mV input signal, CIN = 0.1µF AC coupling input, Gain = 6dB 2Vp-p pulse output BOUT/VOUT, GOUT/UOUT, ROUT/YOUT one load unit = 150Ω Between R/G/B, fc/2 [Hz] Between R/G/B, fc/2 [Hz] Vout = 2Vp-p, f = 1MHz VCC = 0.5Vp-p, f = 100kHz 70 90 1 – – 2.4 40 – – – – – – – – – – DISABLE, MUXSEL, THROUGH DISABLE, MUXSEL, THROUGH GSB1, GSG1, GSR1 GSB1, GSG1, GSR1 GSB1, GSG1, GSR1 DISABLE, MUXSEL, THROUGH 2.5 – VCC − 0.5 – 32 40 typ 100 120 2.5 – – – 50 8 – 10 – – – 3.5 1.5 35 – – – – – 40 50 max 130 160 5 ± 0.5 ±1 – 60 – 1.4 – 15 2 0.5 – – – 100 – 1.0 – 0.5 48 60 mA mA mA dB dB Vp-p kΩ ms Vp-p % pF load dB degree % dB mA V V V V kΩ kΩ Unit Test level I I I I I I I II I II II I I II II II II I I I I I I dφ THD PSRR ISC VIH1 VIL1 VIH2 VIL2 RIN2 RIN3 SEIKO NPC CORPORATION —5 SM5301BS Filter Mode Characteristics VCC = 4.5 to 5.5V, Ta = – 25 to 85°C, THROUGH = Low, VI = 0.7Vp-p unless otherwise noted. Refer to “Measurement Circuit”. Rating Parameter Cutoff frequency adjustment range Cutoff frequency error 4fc attenuation Crosstalk Multiplexer crosstalk Channel-to-channel group delay Symbol Condition min FC ∆FC fSB XTALK XTALK TPD ∆TPD1 Ta=25°C (see Figure 1–1) Ta = 25°C, VCC = 5.0V fIN ≥ 4fc Between 2 channels with input 0.5Vp-p 1MHz Between MUX A−B with input 0.5Vp-p 1MHz Each input = 500kHz Fc = 6.7MHz (500kHz) to 3.58MHz to 4.43MHz to 3.58MHz Group delay variation ∆TPD2 Fc = 24MHz (500kHz) to 4.43MHz to 10MHz ∆TPD3 VFC input voltage range VFC Fc = 36MHz (1MHz) to 10MHz to 30MHz 5.8 – – – – – – – – – – – – 0.2 typ – – 50 − 47 − 49 10 9 15 1 1 2 0.5 5 – max 37 ± 20 – – – – – – – – – – – 1.6 MHz % dB dB dB ns ns ns ns ns ns ns ns V Unit Test level I I II II II II II II II II II II II I Filter mode, through mode Through Mode Characteristics VCC = 5.0V, Ta = – 25 to 85°C, THROUGH = High, VI = 0.7Vp-p unless otherwise noted. Refer to “Measurement Circuit”. Rating Parameter Symbol Condition min Cutoff frequency (6dB) Cutoff frequency (0dB) Crosstalk Multiplexer crosstalk FC FC XTALK XTALK Ta=25°C, Gain = 6dB, VFC = 1.6V, RFC=820Ω Ta=25°C, Gain = 0dB, VFC = 1.6V, RFC=820Ω Between 2 channels with input 0.5Vp-p 1MHz Between MUX A−B with input 0.5Vp-p 1MHz 42 39 – – typ 46 43 − 60 − 60 max – – – – MHz MHz dB dB Unit Test level I I II II Test level I : 100% of products tested at Ta = + 25°C. II : Guaranteed as result of design and characteristics evaluation. SEIKO NPC CORPORATION —6 SM5301BS Measurement Circuit VFC(DC) + + 47µF 0.1µF 0.1µF 47µF 0.1µF TP 220µF + Analog Input RFC 0.1µF 1000pF 75Ω 75Ω THROUGH MUXSEL GSR1 VCC4 VCC1 RINB/YINB RINA/YINA GND4 ROUT/YOUT GND1 VCC2 VFC NC RFC + GOUT/UOUT BOUT/VOUT 47µF 0.1µF GINA/UINA GINB/UINB BINA/VINA BINB/VINB DISABLE GSG1 GND3 GND2 GSB1 VCC3 NC NC TP 0.1µF 220µF + Analog Input 0.1µF 1000pF 0.1µF + 75Ω 75Ω 47µF 0.1µF Analog Input 0.1µF TP 220µF + 1000pF 75Ω 75Ω SEIKO NPC CORPORATION —7 SM5301BS FUNCTION DESCRIPTION Output Buffer Gain Control GS×1 pin sets the output buffer gain. GSR1, GSG1, GSB1 Low High or Open Gain [dB] 0 6 Cutoff Frequency Control (RFC and VFC) Cutoff frequency (fc) can be controlled by control current Ifc (= VFC/RFC) shown as Figure 1-1. And relation of fc vs VFC at RFC = 680Ω, 820Ω, 1kΩ is shown as Figure 1-2. 40 35 30 fc [MHz] 25 20 15 10 5 0 0 0.5 1 Ifc [mA] 1.5 2 2.5 Figure 1-1. fc vs. Ifc 40 35 30 fc [MHz] RFC = 680Ω RFC = 820Ω RFC = 1kΩ 25 20 15 10 5 0 0 0.5 1 VFC [V] 1.5 2 Figure 1-2. fc vs. VFC SEIKO NPC CORPORATION —8 SM5301BS 20 Gain = 6dB 0 Gain = 0dB Gain [dB] − 20 − 40 − 60 − 80 0.1 1 10 Frequency [MHz] 100 Figure 2-1. Filter characteristic (RFC = 820Ω, VFC = 0.2V) 20 Gain = 6dB 0 Gain [dB] Gain = 0dB − 20 − 40 − 60 0.1 1 Frequency [MHz] 10 100 Figure 2-2. Filter characteristic (RFC = 820Ω, VFC = 1.0V) 20 Gain=6dB 0 Gain=0dB Gain [dB] − 20 − 40 − 60 0.1 1 Frequency [MHz] 10 100 Figure 2-3. Filter characteristic (RFC = 820Ω, VFC = 1.6V) SEIKO NPC CORPORATION —9 SM5301BS Filter Through Mode THROUGH pin sets the through mode. It functions only output buffer, and bypasses the LPF. THROUGH Low or Open High Filter mode/Through mode Filter mode Through mode Frequency characteristics of through mode is shown as Figure 3 (VFC = 1.6V, RFC = 820Ω). 20 Gain = 6dB 0 Gain = 0dB Gain [dB] − 20 − 40 − 60 0.1 1 Frequency [MHz] 10 100 Figure 3. Through mode frequency characteristic Analog Signal Input Input Channel Selection MUXSEL pin sets the analog input channel ×INA or ×INB. MUXSEL Low or Open High Analog input channel ×INA ×INB Selected pins are connected to the internal synctip clamp circuit. Clamp voltage is 2.3V (typ). BIAS Input When input signal is color difference signal of component signal, BIAS input is suitable better than CLAMP input. Connect the resistors as Figure 4, it functions BIAS input. VCC 220kΩ XINA/B 330kΩ GND1 Figure 4. Resistor connection for BIAS input SEIKO NPC CORPORATION —10 SM5301BS Adjusting the Cutoff Frequency Constant-voltage control 1 Cutoff frequency control using a reference voltage VR generated by voltage divider formed by R1 and R2. VR R1 VFC R2 RFC Constant-voltage control 2 Cutoff frequency control by adjusting the resistance connected to RFC. VFC VR RFC PWM control Cutoff frequency control by smoothing the PWM signal, using R1 and C1, input to VFC. PWM R1 VFC C1 RFC When VFC = 0.2V VDD = 3.3V, 6% duty drive VDD = 5.0V, 4% duty drive When VFC = 1.6V VDD = 3.3V, 48% duty drive VDD = 5.0V, 32% duty drive Note: The resistor connected to RFC can affect the cutoff frequency response, so a high-precision component should be used. It is recommended to set the RC filter cutoff frequency to < 1/100fc of the PWM waveform frequency. SEIKO NPC CORPORATION —11 SM5301BS Resistor switch control The VFC voltage can be controlled using multi-logic voltage levels switching inputs to a voltage divider resistor network. V1 V2 V3 R1 R2 R3 VFC RFC R0 The VFC voltage is determined by the logic voltage (V1, V2, V3) and the corresponding voltage divider resistor network. SEIKO NPC CORPORATION —12 SM5301BS TYPICAL APPLICATION CIRCUITS ATSC Digital TV Application 820Ω Cut-off control voltage Filter through switch RIN/YIN GSR1 +5V + (*3) + R/Y 75Ω 1.0µF (*4) (*1) (*2) (*2) 220µF RINB/YINB THROUGH RINA/YINA MUXSEL GSR1 VCC4 VCC1 GND4 (*6) ROUT/YOUT GND1 GND2 BOUT/VOUT (*6) GIN/UIN GSG1 GOUT/UOUT GINA/UINA GINB/UINB BINA/VINA BINB/VINB DISABLE GSG1 GND3 GSB1 NC NC VCC3 VCC2 VFC RFC NC 1.0µF (*4) (*1) (*1) (*2) (*2) + G/U 75Ω 220µF + B/V 75Ω BIN/VIN GSB1 DISABLE 220µF 1.0µF (*4) (*1) Pins without an input signal, set by NUXSEL, should be left open or tied to GND. (*2) Connect 4 × 0.1µF capacitor between the supply pins close to the IC. (*3) Connect a 47µF capacitor between the supply pins close to the IC. (*4) Connect a capacitor if an error occurs due to external noise for GSR1, GSG1, GSB1 pins. Also, if opencircuit, the internal impedance and external capacitance (C) form an RC network. When power is applied, the open-circuit potential rises with time constant τ = C × 10k (sec). (*5) Printed circuit board supply wiring I I I If the supply is used for other digital circuits, there is a possibility that noise will be introduced. Accordingly, these circuits should be connected to the application’s analog supply. Ground-plane wiring should be performed, as much as possible, to provide low GND line impedance. If ground-plane wiring up to the GND pins is difficult, the ground plane should be as close to the IC as possible with a separate wire to each GND pin. (*6) The tab (radiation fin) between 7 pin and 8 pin and between 21 pin and 22 pin should be connected to the large ground plane as much as possible for radiation. Input Capacitor and High Pass Filter Cutoff Frequency The capacitor connected to pins RINA/YINA, RINB/YINB, GINA/UINB, GINB/UINB, BINA/VINA, and BINB/VINB forms a highpass filter (HPF) with the internal impedance. The HPF cutoff frequency is given by the following equation. fc = 1 2πCR (C: input capacitance, R: signal input impedance = 9.3kΩ (typ)) SEIKO NPC CORPORATION —13 SM5301BS 2-load Output Connection ROUT/YOUT output 2-load connection (similarly for GOUT/UOUT , BOUT/VOUT outputs) 220µF ROUT/YOUT + 75Ω R/Y1 75Ω R/Y2 Digital TV Receiver and HDTV Decoder Box Graphic Processor MPEG2 Transport/Decoder HDTV Decoder/Display Processor D to A Converter SM5301B DIGITAL TV CAMERA Video Decoder and Display Processor D to A Converter SM5301B RGB MONITOR DVD-ROM MEMORY Graphic Processor Plasma Display Panel HD Analog Video RGB or Y/Cr/Cb Color Signal SM5301B A/D Converter DSP Gate Alley Frame Memory From PC Video VGA Adress Driver LSI Y/C Composite Scan Driver LSI X-sustein Pulse Generator NTSC Analog Video Y/C Separate SM5301B PDP Panel Synchronous Circuit Vsync Hsync Adress Driver LSI Power Supply AC/DC DC/DC CPU Clocks SEIKO NPC CORPORATION —14 Scan Driver LSI Y-sustein Pulse Generator SM5301BS Please pay your attention to the following points at time of using the products shown in this document. The products shown in this document (hereinafter “Products”) are not intended to be used for the apparatus that exerts harmful influence on human lives due to the defects, failure or malfunction of the Products. Customers are requested to obtain prior written agreement for such use from SEIKO NPC CORPORATION (hereinafter “NPC”). Customers shall be solely responsible for, and indemnify and hold NPC free and harmless from, any and all claims, damages, losses, expenses or lawsuits, due to such use without such agreement. NPC reserves the right to change the specifications of the Products in order to improve the characteristic or reliability thereof. NPC makes no claim or warranty that the contents described in this document dose not infringe any intellectual property right or other similar right owned by third parties. Therefore, NPC shall not be responsible for such problems, even if the use is in accordance with the descriptions provided in this document. Any descriptions including applications, circuits, and the parameters of the Products in this document are for reference to use the Products, and shall not be guaranteed free from defect, inapplicability to the design for the mass-production products without further testing or modification. Customers are requested not to export or re-export, directly or indirectly, the Products to any country or any entity not in compliance with or in violation of the national export administration laws, treaties, orders and regulations. Customers are requested appropriately take steps to obtain required permissions or approvals from appropriate government agencies. SEIKO NPC CORPORATION 15-6, Nihombashi-kabutocho, Chuo-ku, Tokyo 103-0026, Japan Telephone: +81-3-6667-6601 Facsimile: +81-3-6667-6611 http://www.npc.co.jp/ Email: sales@npc.co.jp NC0208BE 2006.04 SEIKO NPC CORPORATION —15