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. ■ ■ ■ ■ ■ ■ ■ ■ GINA/UINA 1 28 NC GSG1 2 27 RINB/YINB GINB/UINB 3 26 GSR1 NC 4 25 RINA/YINA BINA/VINA 5 24 VCC4 GSB1 6 23 THROUGH BINB/VINB 7 22 MUXSEL GND NC 8 21 VFC DISABLE 9 20 RFC GND3 10 19 GND4 BOUT/VOUT 11 18 VCC1 VCC3 12 17 ROUT/YOUT GND2 13 16 GND1 GOUT/UOUT 14 15 VCC2 APPLICATIONS ■ ■ Set-top boxes Digital television DVD players ORDERING INFORMATION Device Package SM5301BS 28-pin HSOP PACKAGE DIMENSIONS (Unit: mm) + 0.1 0.15 – 0.0 5 7.5 ± 0.2 ■ GND 0.5 ± 0.2 ■ (Top view) 9.9 ± 0.3 ■ 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) 1.3TYP 2.2 ± 0.1 ■ PINOUT 18.6 ± 0.3 0.8 5.15 0.10 0.35 ± 0.05 0.12 M 0 to 10 0.1 ± 0.05 FEATURES SEIKO NPC CORPORATION —1 SM5301BS BLOCK DIAGRAM VCC1 VCC2 VCC3 VCC4 DISABLE Buffer RINA/YINA MUX ROUT/YOUT LPF RINB/YINB GSR1 Buffer GINA/UINA MUX GOUT/UOUT LPF GINB/UINB GSG1 Buffer BINA/VINA MUX BOUT/VOUT LPF BINB/VINB GSB1 MUXSEL RFC IFC Control VFC THROUGH 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 Name I/O1 1 GINA/UINA I 2 GSG1 Ipu 3 GINB/UINB I Analog GINB or UINB signal input 4 NC − No connection (leave open or connect to ground) 5 BINA/VINA I Analog BINA or VINA signal input 6 GSB1 Ipu 7 BINB/VINB I Analog BINB or VINB signal input 8 NC − No connection (leave open or connect to ground) 9 DISABLE Ipd Power save function L: Enable H: Disable (Output pins: ROUT/YOUT, GOUT/UOUT, and BOUT/VOUT are high impedance.) 10 GND3 − Analog ground 11 BOUT/VOUT O B/V signal output 12 VCC3 − Analog 5V supply 13 GND2 − Analog ground 14 GOUT/UOUT O G/U signal output 15 VCC2 − Analog 5V supply 16 GND1 − Analog ground 17 ROUT/YOUT O R/Y signal output 18 VCC1 − Analog 5V supply 19 GND4 − Analog ground 20 RFC − LPF (lowpass filter) cutoff frequency setting resistor connection 21 VFC I LPF (lowpass filter) cutoff frequency setting voltage input 22 MUXSEL Ipd Input select signal L: ×INA pin select H: ×INB pin select 23 THROUGH Ipd Filter mode select pin L: Filter mode H: Filter through mode 24 VCC4 − Analog 5V supply 25 RINA/YINA I Analog RINA or YINA signal input 26 GSR1 Ipu 27 RINB/YINB I Analog RINB or YINB signal input 28 NC − No connection (leave open or connect to ground) Description Analog GINA or UINA signal input GOUT/UOUT output buffer gain set input BOUT/VOUT output buffer gain set input ROUT/YOUT output buffer gain set input 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 Symbol Rating Unit Supply voltage range VCC − 0.3 to 7.0 V Supply voltage deviation1 ∆VCC ± 0.1 V Storage temperature range Tstg − 55 to + 125 °C Power dissipation 12 PD1 1.0 W Power dissipation 23 PD2 0.9 W Junction temperature Tj 125 °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 Rating Unit VCC 4.5 to 5.5 V Ta – 25 to 85 °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 typ max Unit Test level Supply current 1 ICC1 VCC = 5.5V, RFC = 820Ω to GND, VFC = 0.2V, DISABLE = "L" 70 100 130 mA I Supply current 2 ICC2 VCC = 5.5V, RFC = 820Ω to GND, VFC = 1.6V, DISABLE = "L" 90 120 160 mA I Supply current 3 ICC3 VCC = 5.5V, RFC = 820Ω to GND, VFC = 0.2V, DISABLE = "H" 1 2.5 5 mA I Output gain error 1 ∆AV1 Gain = 0dB/6dB, VCC = 4.75 to 5.25V, Ta = 0 to 70°C – – ± 0.5 dB I Output gain error 2 ∆AV2 Gain = 0dB/6dB, Ta = – 25 to 85°C – – ±1 dB I Maximum output voltage Vout RL = 75Ω to GND, Gain = 6dB 2.4 – – Vp-p I DISABLE-mode input impedance (pull-down) RIN1 RINA/YINA, RINB/YINB, GINA/UINA, GINB/UINB, BINA/VINA, BINB/VINB 40 50 60 kΩ I Time for 90% output signal change for 10mV input signal, CIN = 0.1µF – 8 – ms II AC coupling input, Gain = 6dB – – 1.4 Vp-p I Clamp response time Maximum input amplitude Tclamp VI Maximum overshoot VOS 2Vp-p pulse output – 10 – % II Maximum load capacitance CL BOUT/VOUT, GOUT/UOUT, ROUT/YOUT – – 15 pF II Output drive load RL one load unit = 150Ω – – 2 load I Channel-to-channel gain difference dG Between R/G/B, fc/2 [Hz] – – 0.5 dB I Channel-to-channel phase difference dφ Between R/G/B, fc/2 [Hz] – 3.5 – degree II Output harmonic distortion THD Vout = 2Vp-p, f = 1MHz – 1.5 – % II Power supply rejection ratio PSRR VCC = 0.5Vp-p, f = 100kHz – 35 – dB II Output short-circuit current ISC – – 100 mA II Logic HIGH-level input voltage 1 VIH1 DISABLE, MUXSEL, THROUGH 2.5 – – V I Logic LOW-level input voltage 1 VIL1 DISABLE, MUXSEL, THROUGH – – 1.0 V I Logic HIGH-level input voltage 2 VIH2 GSB1, GSG1, GSR1 VCC − 0.5 – – V I Logic LOW-level input voltage 2 VIL2 GSB1, GSG1, GSR1 – – 0.5 V I Logic pull-up resistance RIN2 GSB1, GSG1, GSR1 32 40 48 kΩ I Logic pull-down resistance RIN3 DISABLE, MUXSEL, THROUGH 40 50 60 kΩ I 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 Symbol FC Unit Test level 37 MHz I Condition Ta=25°C (see Figure 1–1) min typ max 5.8 – Cutoff frequency error ∆FC Ta = 25°C, VCC = 5.0V – – ± 20 % I 4fc attenuation fSB fIN ≥ 4fc – 50 – dB II Crosstalk XTALK Between 2 channels with input 0.5Vp-p 1MHz – − 47 – dB II Multiplexer crosstalk XTALK Between MUX A−B with input 0.5Vp-p 1MHz – − 49 – dB II Each input = 500kHz – 10 – ns II to 3.58MHz – 9 – ns II to 4.43MHz – 15 – ns II to 3.58MHz – 1 – ns II to 4.43MHz – 1 – ns II to 10MHz – 2 – ns II to 10MHz – 0.5 – ns II to 30MHz – 5 – ns II 0.2 – 1.6 V I Channel-to-channel group delay Group delay variation TPD ∆TPD1 Fc = 6.7MHz (500kHz) ∆TPD2 Fc = 24MHz (500kHz) ∆TPD3 VFC input voltage range VFC Fc = 36MHz (1MHz) 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 typ max Unit Test level Cutoff frequency (6dB) FC Ta=25°C, Gain = 6dB, VFC = 1.6V, RFC=820Ω 42 46 – MHz I Cutoff frequency (0dB) FC Ta=25°C, Gain = 0dB, VFC = 1.6V, RFC=820Ω 39 43 – MHz I Crosstalk XTALK Between 2 channels with input 0.5Vp-p 1MHz – − 60 – dB II Multiplexer crosstalk XTALK Between MUX A−B with input 0.5Vp-p 1MHz – − 60 – dB 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) 0.1µF 47µF + 0.1µF 47µF TP 220µF + 0.1µF 0.1µF 75Ω 1000pF RFC Analog Input VCC2 GND1 GND2 GOUT/UOUT VCC1 ROUT/YOUT VCC3 BOUT/VOUT GND4 GND3 VFC RFC DISABLE NC MUXSEL BINB/VINB GSB1 THROUGH VCC4 BINA/VINA RINA/YINA NC RINB/YINB GSR1 GINB/UINB GSG1 + GINA/UINA NC 75Ω 47µF 0.1µF TP 220µF 0.1µF Analog Input + 0.1µF 75Ω 1000pF Analog Input + 0.1µF 47µF 0.1µF 75Ω 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 Gain [dB] Low 0 High or Open 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 fc [MHz] 30 25 20 15 10 5 0 0 0.5 1 1.5 2 2.5 Ifc [mA] Figure 1-1. fc vs. Ifc 40 RFC = 680Ω 35 RFC = 820Ω 30 fc [MHz] RFC = 1kΩ 25 20 15 10 5 0 0 0.5 1 1.5 2 VFC [V] Figure 1-2. fc vs. VFC SEIKO NPC CORPORATION —8 SM5301BS 20 Gain = 6dB 0 Gain [dB] Gain = 0dB − 20 − 40 − 60 − 80 0.1 1 10 Frequency [MHz] 100 Figure 2-1. Filter characteristic (RFC = 820Ω, VFC = 0.2V) 20 Gain = 6dB Gain [dB] 0 Gain = 0dB − 20 − 40 − 60 0.1 1 10 100 Frequency [MHz] Figure 2-2. Filter characteristic (RFC = 820Ω, VFC = 1.0V) 20 Gain=6dB 0 Gain [dB] Gain=0dB − 20 − 40 − 60 0.1 1 10 100 Frequency [MHz] 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 Filter mode/Through mode Low or Open Filter mode High Through mode Frequency characteristics of through mode is shown as Figure 3 (VFC = 1.6V, RFC = 820Ω). 20 Gain = 6dB 0 Gain [dB] Gain = 0dB − 20 − 40 − 60 0.1 1 10 100 Frequency [MHz] Figure 3. Through mode frequency characteristic Analog Signal Input Input Channel Selection MUXSEL pin sets the analog input channel ×INA or ×INB. MUXSEL Analog input channel Low or Open ×INA High ×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 VFC R2 R3 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 820Ω ATSC Digital TV Application +5V + Cut-off control voltage Filter through switch (*3) + RIN/YIN 1.0µF GSR1 (*2) 220µF (*2) R/Y 75Ω (*4) GND1 VCC2 GND2 GOUT/UOUT VCC1 ROUT/YOUT VCC3 BOUT/VOUT RFC GND4 DISABLE GND3 (*6) VFC (*6) NC MUXSEL BINB/VINB VCC4 THROUGH GSB1 BINA/VINA GSR1 RINA/YINA NC GINB/UINB NC (*1) 1.0µF GSG1 GSG1 GINA/UINA GIN/UIN RINB/YINB (*1) + (*1) 220µF (*4) G/U 75Ω (*2) (*2) + BIN/VIN 220µF B/V 75Ω 1.0µF GSB1 (*4) DISABLE (*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 ■ ■ ■ 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 75Ω + ROUT/YOUT R/Y1 75Ω R/Y2 Digital TV Receiver and HDTV Decoder Box Graphic Processor MPEG2 Transport/Decoder CAMERA HDTV Decoder/Display Processor D to A Converter SM5301B DIGITAL TV Video Decoder and Display Processor D to A Converter SM5301B RGB MONITOR DVD-ROM MEMORY Graphic Processor Plasma Display Panel HD Analog Video From PC Video RGB or Y/Cr/Cb Color Signal SM5301B A/D Converter Gate Alley Frame Memory DSP VGA Adress Driver LSI SM5301B Y/C Separate Synchronous Circuit Vsync Hsync Power Supply AC/DC PDP Panel Scan Driver LSI Y-sustein Pulse Generator Scan Driver LSI X-sustein Pulse Generator Y/C Composite NTSC Analog Video Adress Driver LSI DC/DC CPU Clocks SEIKO NPC CORPORATION —14 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: [email protected] NC0208BE 2006.04 SEIKO NPC CORPORATION —15