August 1999 PRELIMINARY ML6427 75W Quad Video Cable Drivers and Filters with Switchable Inputs GENERAL DESCRIPTION FEATURES The ML6427 is a quad 4th-order Butterworth lowpass reconstruction filter plus quad video amplifier optimized for minimum overshoot and flat group delay. Each filter channel has a two-input multiplexer that switches between two groups of quad video signals. Applications driving SCART and EVC cables are supported for composite, component, and RGB video. ■ Cable drivers for Peritel (SCART), Enhanced Video Connector (EVC), and standard video connectors, 75W cable drivers for CV, S-video, and RGB ■ 7.1MHz CV, RGB, and S-video, NTSC or PAL filters with mux inputs and output channel mux ■ Quad reconstruction filter or dual anti-aliasing filter ■ 43dB stopband attenuation at 27MHz ■ 1dB flatness up to 4.8MHz A fifth unfiltered channel is provided to support an additional analog composite video input. A swapping multiplexer between the two composite channels allows the distribution amplifiers to output from either input. ■ 12ns group delay flatness up to 10MHz ■ 0.4% differential gain, 0.4º differential phase on all channels Several ML6427s can be arranged in a master-slave configuration where an external sync can be used for CV and RGB outputs. ■ 0.4% total harmonic distortion on all channels ■ Master-slave configuration allows up to 8 multiplexed, filtered output signals 1VP-P input signals from DACs are AC coupled into the ML6427 where they are DC restored. Outputs are AC coupled and drive 2VP-P into a 150W load. The ML6427 can provide DC coupled outputs for certain applications. BLOCK DIAGRAM 17 VCCORGB UNFILTERED CHANNEL SYNCIN 2 3 4 7 8 9 TRANSCONDUCTANCE ERROR AMP TRANSCONDUCTANCE ERROR AMP BINA/C1 11 BINB/C2 12 A/B MUX ×2 CVOUT1/YOUTA 21 4th-ORDER FILTER ×2 CVOUT/YOUTB 20 4th-ORDER FILTER ×2 ROUT/YOUTC 18 4th-ORDER FILTER ×2 GOUT/YOUTD 16 4th-ORDER FILTER ×2 BOUT/COUT 15 0.5V + – 0.5V MUX TRANSCONDUCTANCE ERROR AMP + – MUX TRANSCONDUCTANCE ERROR AMP 0.5V + – MUX 13 SWAP CVF SWAP MUX REQUIRED SYNC STRIP GINA/Y6 GINB/Y2 10 1 MUX 14 SWAP CVU + – RINA/Y4 RINB/Y5 6 VCC SYNC TIMER CVINFA/Y2* CVINFB/Y3* TRANSCONDUCTANCE ERROR AMP SYNC TIMER SYNCIN 23 SYNCOUT 24 22 VCCOCV 0.5V + – *CAN ALSO INPUT SYNC ON GREEN SIGNALS 0.75V GNDO 19 GND 5 1 ML6427 PIN CONFIGURATION ML6427 24-Pin SOIC (S24) A/B MUX 1 24 SYNCOUT CVINU/Y1 2 23 SYNCIN CVINFA/Y2 3 22 VCCOCV CVINFB/Y3 4 21 CVOUT1/YOUTA GND 5 20 CVOUT2/YOUTB VCC 6 19 GNDO RINA/Y4 7 18 ROUT/YOUTC RINB/Y5 8 17 VCCORGB GINA/Y6 9 16 GOUT/YOUTD GINB/Y7 10 15 BOUT/COUT BINA/C1 11 14 SWAP CVU BINB/C2 12 13 SWAP CVF TOP VIEW 2 ML6427 PIN DESCRIPTION PIN NAME 1 A/B MUX 2 3 4 CVINU/Y1 CVINFA/Y2 CVINFB/Y3 FUNCTION PIN Logic input pin to select between Bank <A> or <B> of the CV, RGB, or Y/C inputs. Internally pulled high. 12 BINB/C2 Filtered analog BLUE video or chroma video input for Bank <B> 13 SWAP CVF Logic input pin to select whether the outputs of CVOUT1/YOUTA and CVOUT2/YOUTB are from filtered or unfiltered CV sources. See Table 1. Internally pulled low. 14 SWAP CVU Logic input pin to select whether the outputs of CVOUT1/YOUTA and CVOUT2/YOUTB are from filtered or unfiltered CV sources. See Table 1. Internally pulled low. 15 BOUT/COUT Analog BLUE video output or chroma output from either BINA/C1 or BINB/C2 16 GOUT/YOUTD Analog GREEN video output or luma output from either GINA/Y6 or GINB/Y7 17 VCCORGB 5V power supply for output buffers of the RGB drivers 18 ROUT/YOUTC Analog RED video output or luma output from either RINA/Y4 or RINB/ Y5 19 GNDO Ground for output buffers Unfiltered analog composite video or luma video input. Internally pulled high. A composite or luma or green signal must be present on either the CVINFA/Y2 or the CVINFB/ Y3 input to provide necessary sync signals to other channels (R, G, B, Y, C). Otherwise, sync must be provided at SYNCIN. For RGB applications the green channel with sync can be used as an input to this pin (see RGB Applications section). Filtered analog composite video or luma video input for Bank <A>. Note that SYNC is stripped from this signal for the other channels. A composite or luma or green signal must be present on either the CVINFA/Y2 or the CVINFB/Y3 input to provide necessary sync signals to other channels (R, G, B, Y, C). Otherwise, sync must be provided at SYNCIN. For RGB applications the green channel with sync can be used as an input to this pin (see RGB Applications section). Filtered analog composite video or luma video input for Bank <B>. Note that SYNC is stripped from this signal for the other channels. 5 GND Analog ground 6 VCC Analog 5V supply 7 RINA/Y4 Filtered analog RED video or luma video input for Bank <A> 8 RINB / Y5 Filtered analog RED video or luma video input for Bank <B> 9 GINA/Y6 Filtered analog GREEN video or luma video input for Bank <A> 10 GINB/Y7 Filtered analog GREEN video or luma video input for Bank <B> 11 BINA/C1 Filtered analog BLUE video or chroma video input for Bank <A> NAME FUNCTION 20 CVOUT2/YOUTB Composite video output for channel 2 or luma output. 21 CVOUT1/YOUTA Composite video output for channel 1 or luma output. 22 VCCOCV 5V power supply for output buffers of the CV drivers. 23 SYNCIN Input for an external H-sync logic signal for filtered channels. TTL or CMOS. For normal operation SYNCOUT is connected to SYNCIN. 24 SYNCOUT Logic output for H-sync detect for CVINFA/Y2 or CVINFB/Y3. TTL or CMOS. For normal operation SYNCOUT is connected to SYNCIN. 3 ML6427 ABSOLUTE MAXIMUM RATINGS Storage Temperature Range...................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) ..................... 260°C Thermal Resistance (qJA) ...................................... 80°C/W Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. OPERATING CONDITIONS VCC .................................................................................................. 6V Junction Temperature ............................................. 150°C ESD ..................................................................... >2000V Temperature Range ........................................ 0°C to 70°C VDD Range ................................................... 4.5V to 5.5V ELECTRICAL CHARACTERISTICS Unless otherwise specified, VCC = 5V ±10%, TA = Operating Temperature Range (Note 1) SYMBOL PARAMETER CONDITIONS ICC Supply Current No Load (VCC = 5V) AV Low Frequency Gain (All Channels) VIN = 100mVP-P at 300kHz VSYNC TYP MAX 90 UNITS mA 5.34 6.0 6.65 dB Channel Sync Output Level CV/Y, R/Y, G/Y Sync Present and Clamp Settled 0.6 0.9 1.1 V B/C Sync Present and Clamp Settled 1.2 1.4 1.5 V Unfiltered Sync Present and Clamp Settled 0.7 1.0 1.2 V tCLAMP Clamp Response Time Settled to Within 10mV, CIN=0.1µF 10 ms f0.5dB 0.5dB Bandwidth (Flatness. All Filtered Channels) All Outputs 4.5 MHz fC –3dB Bandwidth (Flatness. All Filtered Channels) All Outputs (With no Peaking Cap. See Figures 2 and 13) 7.1 MHz 0.8 x fC Attenuation, All Filtered Channels All Outputs 1.5 dB fSB Stopband Rejection All Filtered Channels fIN = 27MHz to 100MHz worst case (See Figures 2 and 13) –35 –41 dB Vi Input Signal Dynamic Range (All Channels) AC Coupled 1 1.25 VP-P 1 mVRMS 4.3 % 120 mA 0.8fC NOISE 6.7 Output Noise (All Channels) Over a Frequency Band of 25Hz-50MHz OS Peak Overshoot (All Channels) 2VP-P Output Pulse ISC Output Short Circuit Current (All Channels) Note 2 CL Output Load Capacitance (All Channels) Load at the Output Pin dG Differential Gain (All Channels) All Outputs 0.4 % dF Differential Phase (All Channels) All Outputs 0.4 º THD Output Distortion (All Channels) VOUT = 1.8VP-P at 3.58/4.43MHz 0.4 % Crosstalk Input of 0.5VP-P at 3.58/4.43MHz on any channel to output of any other channel –55 dB Input of 0.5VP-P at 3.58/4.43MHz –54 dB Input of 0.5VP-P at 3.58/4.43MHz –52 dB XTALK Input A/B MUX Crosstalk Swap Mux Crosstalk 4 MIN 35 pF ML6427 ELECTRICAL CHARACTERISTICS (Continued) SYMBOL PSRR PARAMETER CONDITIONS MIN TYP MAX UNITS PSRR (All Channels) 0.5VP-P (100kHz) at VCC –39 dB Group Delay (All Channels) at 100kHz 60 ns Group Delay Deviation from Flatness to 3.58MHz (NTSC) 4 ns to 4.43MHz (PAL) 7 ns (All Channels) to 10MHz 12 ns VIH Input Voltage Logic High A/B MUX, SWAP CVU, SWAP CVF VIL Input Voltage Logic Low A/B MUX, SWAP CVU, SWAP CVF tpd Dtpd Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions. Note 2: Sustained short circuit protection limited to 10 seconds. 2.5 V 1 V 5 ML6427 FUNCTIONAL DESCRIPTION The ML6427 is a quad monolithic continuous time analog video filter designed for reconstructing signals from four video D/A sources. The ML6427 is intended for use in AC coupled input and output applications. of the “slave” ML6427 it will have its SYNCIN input connected to the SYNCOUT output of the “master” ML6427. SYNCIN AND SYNCOUT PINS The filters approximate a 4th-order Butterworth characteristic with an optimization toward low overshoot and flat group delay. All outputs are capable of driving 2VP-P into AC coupled 150W video loads with up to 35pF of load capacitance at the output pin. They are also capable of driving a 75W load at 1VP-P. All channels are clamped during sync to establish the appropriate output voltage swing range. Consequently the input coupling capacitors do not behave according to the conventional RC time constant. Clamping for all channels settles within 10ms of a change in video sources. Input coupling capacitors of 0.1µF are recommended for all channels. During sync a feedback error amplifier sources/sinks current to restore the DC level. The net result is that the average input current is zero. Any change in the value of the input coupling capacitors will linearly affect the clamp response times. The RGB channels have no pulldown current sources and are essentially tilt-free. The inputs of the CV channels sink less than 1µA during active video, resulting in a tilt of less than 1mV for 220µF output capacitors. A 1000µF capacitor is recommended for TV applications to minimize tilt in the CV channels. SWAP MULTIPLEXER CONTROL Output pins CVOUT1/YOUTA and CVOUT2/YOUTB are each independently selectable among three input sources (CVINU/Y1, CVINFA/Y2, or CVINFB/Y3) depending on the state of digital inputs SWAP CVF, SWAP CVU, and A/B MUX. This allows the two outputs to remain independent and pass straight through, or to remain independent but swapped, or for both outputs to have the same signal sourcing from either CVINU/Y1, CVINFA/Y2, or CVINFB/Y3 (See Table 1). If SWAP CVF is forced to logic low then CVOUT2/YOUTB is sourced from either the CVINFA/Y2 OR THE CVINFB/Y3 input. If SWAP CVU is logic low then CVOUT1/YOUTA provides video from either the CVINFA/Y2 OR THE CVINFB/Y3 input. If SWAP CVF is logic high then CVOUT2/YOUTB provides video from the CVINU/Y1 input. If SWAP CVU is high then CVOUT1/YOUTA provides video from either the CVINFA/Y2 or the CVINFB/Y3 input. Both SWAP CVF and SWAP CVU will pull low if they are not driven. The ML6427 is robust and stable under all stated load and input conditions. Bypassing both VCC pins directly to ground ensures this performance. Two ML6427s can be connected in a master-slave sync configuration. When using this configuration (See Figure 6) only the “master” ML6427 is required to have a signal with embedded sync present on the CVINFA/Y2 and CVINFB/Y3 inputs. In the absence of sync on the CVINFA/Y2 and CVINFB/Y3 inputs 6 Each ML6427 has two sync detectors which control the DC restore functions. The unfiltered channel has its own detector, which controls the DC restore function during the horizontal sync period of the CVINU/Y1 input. The other sync detector controls the DC restore functions for the filtered channels based upon the composite or luma silgnal at the CVINFA/Y2 or CVINFB/Y3 input. Required Setup: A composite or luma or green signal must be present on CVINFA/Y2 or CVINFB/Y3 inputs to provide necessary sync signals to other channels (R, G, B, Y, C). Otherwise, sync must be provided at the SYNCIN pin. For RGB applications the green channel with sync can be used as an input to CVINFA/Y2 or CVINFB/Y3. The SYNCOUT pin provides a logic high when it detects the horizontal sync of either the CVINFA/Y2 or CVINFB/Y3 input (note that one input is selected by the A/B MUX pin). The SYNCIN pin is an input for an external H-sync logic signal to enable or disable the internal DC restore loop for the filtered channels. When SYNCIN is logic high the DC restore function is enabled. For normal operation the SYNCOUT pin is connected to the SYNCIN pin (see Figure 4). If neither the CVINFA/Y2 nor the CVINFB/Y3 has an embedded sync an external sync can be applied on the SYNCIN pin. In master-slave configurations the SYNCOUT of a ML6427 master can be used as the SYNCIN of a ML6427 slave (see Figure 6). VIDEO I/O DESCRIPTION Each input is driven by either a low impedance source or the output of a 75W terminated line. The input is required to be AC coupled via a 0.1µF coupling capacitor which gives a nominal clamping time of 10ms. All outputs are capable of driving an AC coupled 150W load at 2VP-P or 1VP-P into a 75W load. At the output pin, up to 35pF of load capacitance can be driven without stability or slew issues. A 220µF AC coupling capacitor is recommended at the output to reduce power consumption. For DC coupled outputs see the Typical Applications section. ANALOG MULTIPLEXER CONTROL The four filter channels each have two input multiplexers which are paired to select between two four-channel video sources (i.e., composite video plus RGB component video). If A/B MUX is forced to logic high, it will select Bank<A> of the video inputs (CVINFA/Y2, RINA/Y4, GINA/ Y6, BINA/C1) to be enabled. If A/B MUX is logic low then Bank<B> of video inputs (CVINFB/Y3, RINB/Y5,GINB/Y7, BINFB/C2) will be selected. If the A/B MUX is open it will pull to logic high. 1 20 0 0 AMPLITUDE (dB) AMPLITUDE (dB) ML6427 –1 –2 –3 –4 –20 –40 –60 0 0.1 1 –80 0.01 10 0.1 FREQUENCY (MHz) 1 10 100 FREQUENCY (MHz) Figure 1. Passband Flatness (Normalized) All outputs. Passband is ripple-free. Figure 2. Passband/Stopband Rejection Ratios (Normalized) All outputs. 90 DELAY (ns) 70 50 30 10 1 2 3 4 5 6 7 8 9 10 11 FREQUENCY (MHz) Figure 3. Group Delay, all Outputs Low frequency group delay is 62ns. At 3.58MHz group delay increases by only 4ns. At 4.43MHz group delay increases by only 7ns. The maximum deviation from flat group delay of 12ns occurs at 6MHz. A/B MUX INPUTS SWAP CVU SWAP CVF 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 CVOUT1/YOUTA CVOUT2/YOUTB CVINU/Y1 CVINU/Y1 CVINFB/Y3 CVINFB/Y3 CVINU/Y1 CVINU/Y1 CVINFA/Y2 CVINFA/Y2 CVINFB/Y3 CVINU/Y1 CVINFB/Y3 CVINU/Y1 CVINFA/Y2 CVINU/Y1 CVINFA/Y2 CVINU/Y1 OUTPUTS ROUT/YOUTC GOUT/YOUTD BOUT/COUT RINB/Y5 RINB/Y5 RINB/Y5 RINB/Y5 RINA/Y4 RINA/Y4 RINA/Y4 RINA/Y4 GINB/Y7 GINB/Y7 GINB/Y7 GINB/Y7 GINA/Y6 GINA/Y6 GINA/Y6 GINA/Y6 BINB/C2 BINB/C2 BINB/C2 BINB/C2 BINA/C1 BINA/C1 BINA/C1 BINA/C1 Table 1. Selecting Composite, Luma, RGB, and Chroma Outputs 7 ML6427 TYPICAL APPLICATIONS BASIC APPLICATIONS OSD (ON-SCREEN DISPLAY) APPLICATIONS The ML6427 provides channels for two banks of inputs for RGB and composite video. The R and G channels can be used as luma inputs while the B channel can be used as a chroma input. Composite outputs and an H-sync output are also provided. There are several configurations available with the ML6427. Figure 4 includes a list of basic output options for composite, S-video, TV modulator, and RGB outputs. Note that each composite channel can drive a CV load and a channel modulator simultaneously. The ML6427 standalone can be used as an EVC or SCART cable driver with nine video sources (75W or low impedance buffer) and seven video outputs. All inputs and outputs are AC coupled. When driving seven loads the power dissipation must be calculated to ensure that the junction temperature doesn't exceed 120ºC. Unfiltered RGB video from an OSD processor needs to be filtered and then synchronized to a fast blanking interval or alpha-key signal for later video processing. With the total filter delay being 80ns ±10ns a D flip-flop or similar delay element can be used to delay the fast blanking interval or alpha-key signal. This will synchronize the RGB and OSD signals (Figure 9). CCIR656 AND CCIR601 APPLICATIONS Composite or luma channels can be fed back into an alternate channel or into another ML6427 (master-slave configuration) so that approximately 80dB/decade attenuation outputs are provided. The ML6427 can be configured for composite and luma loopback (Figure 7). H-sync outputs are also provided. EVC CABLE DRIVING CHANNEL MULTIPLEXING The ML6427 can be configured to drive composite video, S-video, and horizontal sync through an EVC connector (Figure 5). Composite video and S-video inputs are filtered through 4th-order Butterworth filters and driven through internal 75W cable drivers. A buffered H-sync output is also available. The ML6427 can be configured for multiple composite channel multiplexing (Figure 8). Composite sources such as VCRs, video game consoles, and camcorders can be selected using the ML6427 swap mux controls. A/B MUX, SWAP CVU, and SWAP CVF signals can be used to select and route from various input sources. SCART CABLE DRIVING DC COUPLED APPLICATIONS The ML6427 can be configured either as a SCART cable driver (Figure 4) or as a SCART cable driver and S-video driver (Figure 6). A horizontal sync output is also available. Note that the ML6427 can be used in a master-slave mode where the SYNCOUT signal from the master is used as the SYNCIN signal of the slave. This allows the CV, S-video, and RGB channels to operate under the same sync signals. Note that in SCART applications it is not always necessary to AC couple the outputs. Systems using SCART connectors for RGB and composite video can typically handle between 0 and 2VDC offset (see DC Coupled Applications section). RGB APPLICATIONS RGB video can be filtered and driven through the ML6427 in one of two ways: 1. For sync suppressed RGB the sync signal can be derived from the composite or luma signal on the inputs of CVINFA/Y2 or CVINFB/Y3. 2. For RGB with sync on the green signal the green channel must be fed into either the CVINFA/Y2 or CVINFB/ Y3 input. The sync will be extracted from green and used on red and bue channels. See also the SYNCIN and SYNCOUT Sections. 8 A 220µF capacitor coupled with a 150W termination resistor forms a highpass filter which blocks DC while passing the video frequencies and avoiding tilt. Lower value capacitors, such as 10µF, would create a problem. By AC coupling the average DC level is zero. Consequently the output voltages of all channels will be centered around zero. Alternately, DC coupling the output of the ML6427 is allowable. There are several tradeoffs: The average DC level on the outputs will be 2V; Each output will dissipate an additional 40mW nominally; The application will need to accommodate a 1VDC offset sync tip; and it is recommended to use only one 75W load per output. However, if it is necessary to drive two loads at a time on the composite output while DC coupling is used then the swap–mux and 5th line driver can be configured to enable the filtered composite signal on both the 4th and 5th line drivers. This divides the composite load driving requirement into two line drivers versus one. Required Setup: A composite or luma or green signal must be present on the CVINFA/Y2 or the CVINFB/Y3 input to provide necessary sync signals to the other channels (R, G, B, Y, C). Otherwise, sync must be provided at the SYNCIN pin. For RGB applications, the green channel with sync can be used as an input to CVINFA/Y2 or CVINFB/Y3. ML6427 TYPICAL APPLICATIONS (Continued) USING THE ML6427 FOR PAL APPLICATIONS capacitors (220pF, 270pF, 330pF and none) between 0 and 10MHz. The ML6427 can be optimized for PAL video by adding frequency peaking to the composite and S-video outputs. Figure 10 illustrates the use of an additional external capacitor (330pF) in parallel with the output source termination resistor. This raises the frequency response from 1.6dB at 4.8MHz to 0.35dB at 4.8MHz, which allows for accurate reproduction of the upper sideband of the PAL subcarrier. Figure 11 shows the frequency response of PAL video with various values of peaking 19 GNDO CVINU/Y1 2 5 GND 17 VCCORGB 22 VCCOCV 6 VCC 220µF CVOUT1/YOUTA CVINFA/Y2 3 For NTSC applications without the peaking capacitor the rejection at 27MHz is 42dB (typical). For PAL applications with the peaking capacitor the rejection at 27MHz is 38dB (typical). See Figure 12. The differential group delay, shown in Figure 13 with and without a peaking capacitor (220pF, 270pF, and 330pF and none), varies slightly with capacitance from 8ns to 13ns. VIDEO CABLES 75Ω CV/Y 21 MODULATOR CVINFB/Y3 4 220µF RINA/Y4 7 CVOUT2/YOUTB RINB/Y5 8 10 11 12 ROUT/YOUTC GINB/Y7 BINA/C1 GOUT/YOUTD BINB/C2 BOUT/COUT SYNCIN 23 CV/Y 20 MODULATOR ML6427 GINA/Y6 9 75Ω SYNCOUT 24 A/B MUX 1 220µF 75Ω R/Y 18 220µF 75Ω 220µF 75Ω G/Y 16 B/C 15 SWAP CVF SWAP CVU 13 14 OPTIONAL FOR DC COUPLED APPLICATIONS H SYNC OUT INPUTS Bank A: Bank B: Other: OUTPUTS RGB, CV filtered path RGB, CV filtered path CV unfiltered path, Sync IN (slave mode) Option 1: 2 CV outputs + 2 TV modulator outputs, 1 RGB output Option 2: 2 CV outputs + 1 TV modulator output, 1 S-video output Other: Sync output (buffered stripped sync) Figure 4. Basic Application for NTSC 2 COMPOSITE VIDEO IN 3 4 LUMA IN 7 8 9 10 CHROMA IN 11 12 19 GNDO CVINU/Y1 5 GND 17 VCCORGB 22 VCCOCV 6 VCC CVOUT1/YOUTA CVINFA/Y2 21 CVINFB/Y3 COMPOSITE VIDEO OUT RINA/Y4 CVOUT2/YOUTB RINB/Y5 ML6427 MASTER GINA/Y6 GINB/Y7 ROUT/YOUTC BINA/C1 GOUT/YOUTD BINB/C2 BOUT/COUT SYNCIN 23 SYNCOUT 24 A/B MUX 1 20 18 LUMA OUT S-VIDEO OUT 16 15 TO EVC CONNECTOR CHROMA OUT SWAP CVF SWAP CVU 13 14 H SYNC OUT Figure 5. EVC (Enhanced Video Connector) Application: S-Video, Composite, plus H-Sync out 9 ML6427 19 GNDO 2 COMPOSITE VIDEO IN 3 4 LUMA IN 7 8 9 10 CHROMA IN 11 12 5 GND 17 VCCORGB 22 VCCOCV CVINU/Y1 6 VCC CVOUT1/YOUTA CVINFA/Y2 21 COMPOSITE VIDEO OUT CVINFB/Y3 RINA/Y4 CVOUT2/YOUTB RINB/Y5 20 ML6427 MASTER GINA/Y6 ROUT/YOUTC GINB/Y7 GOUT/YOUTD BINA/C1 BOUT/COUT BINB/C2 SYNCIN 23 SYNCOUT 24 A/B MUX 1 18 LUMA OUT S-VIDEO OUT 16 15 CHROMA OUT SWAP CVF SWAP CVU 13 14 H SYNC OUT 24 SYNC OUT 2 3 4 R INPUT 7 8 RGB INPUT G INPUT 9 10 B INPUT 11 12 23 SYNC IN 17 VCCORGB CVINU/Y1 22 VCCOCV 6 VCC CVOUT1/YOUTA CVINFA/Y2 21 CVINFB/Y3 RINA/Y4 CVOUT2/YOUTB RINB/Y5 20 ML6427 SLAVE GINA/Y6 ROUT/YOUTC GINB/Y7 GOUT/YOUTD BINA/C1 BOUT/COUT BINB/C2 GNDO 19 GND 5 A/B MUX 1 18 R OUTPUT 16 G OUTPUT 15 B OUTPUT RGB VIDEO OUT SWAP CVF SWAP CVU 13 14 Figure 6. SCART (Peritel) + S-Video Application: S-Video, RGB, Composite, plus H-Sync out 10 TO SCART CONNECTOR ML6427 1kΩ 19 GNDO 2 COMPOSITE VIDEO IN CV0 3 4 7 1kΩ 8 9 LUMA IN 10 CHROMA IN 11 12 5 GND 17 VCCORGB 22 VCCOCV CVINU/Y1 6 VCC CVOUT1/YOUTA CVINFA/Y2 21 CVINFB/Y3 RINA/Y4 CVOUT2/YOUTB RINB/Y5 20 CVL ML6427 MASTER GINA/Y6 ROUT/YOUTC GINB/Y7 GOUT/YOUTD BINA/C1 BOUT/COUT BINB/C2 SYNCIN 23 SYNCOUT 24 A/B MUX 1 18 16 15 CV+ (80dB/DECADE ATTENUATION) COMPOSITE VIDEO OUT LUMA OUT S-VIDEO OUT CHROMA OUT SWAP CVF SWAP CVU 13 14 H SYNC OUT Figure 7a. Composite Loopback (Cascaded Filters) for Additional Attenuation 1kΩ 19 GNDO 2 COMPOSITE VIDEO IN 3 4 7 Y0 LUMA IN 8 9 1kΩ 10 CHROMA IN 11 12 5 GND 17 VCCORGB CVINU/Y1 22 VCCOCV 6 VCC CVOUT1/YOUTA CVINFA/Y2 21 CVINFB/Y3 RINA/Y4 CVOUT2/YOUTB RINB/Y5 20 ML6427 MASTER COMPOSITE VIDEO OUT GINA/Y6 ROUT/YOUTC GINB/Y7 GOUT/YOUTD BINA/C1 BOUT/COUT BINB/C2 SYNCIN 23 SYNCOUT 24 A/B MUX 1 18 16 15 YL Y+ (80dB/DECADE ATTENUATION) CHROMA OUT S-VIDEO OUT SWAP CVF SWAP CVU 13 14 H SYNC OUT Figure 7b. Luma Loopback (Cascaded Filters) for Additional Attenuation Figure 7. CCIR656 and CCIR601 Application: Composite and Luma Loopback, plus H-Sync out 11 ML6427 VIDEO PLAYER VIDEO RECORDER MODULATOR 0.1µF 19 GNDO CV1 2 CV2 COMPOSITE VIDEO IN 3 CV3 4 0.1µF 7 VIDEO GAME CONSOLE 8 9 0.1µF 10 CAMCORDER 11 12 5 GND 17 VCCORGB CVINU/Y1 22 VCCOCV 6 VCC 220µF CVOUT1/YOUTA CVINFA/Y2 21 CV OUTPUT 1 CVINFB/Y3 RINA/Y4 CVOUT2/YOUTB RINB/Y5 20 COMPOSITE VIDEO OUT ML6427 MASTER 220µF GINA/Y6 ROUT/YOUTC GINB/Y7 GOUT/YOUTD BINA/C1 BOUT/COUT BINB/C2 SYNCIN 23 SYNCOUT 24 A/B MUX INPUTS SWAP CVU SWAP CVF 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 A/B MUX 1 18 16 MODULATOR TV 15 SWAP CVF SWAP CVU 13 14 OUTPUTS CVOUT1/YOUTA CVOUT2/YOUTB Video Player Video Player Camcorder Camcorder Video Player Video Player Video Game Console Video Game Console Camcorder Video Player Camcorder Video Player Video Game Console Video Player Video Game Console Video Player Figure 8. Composite Channel Swapping Application: Multiple Composite Channel Multiplexing 12 ML6427 80ns±10ns DELAY UNFILTERED FILTERED R OSD (ON-SCREEN DISPLAY) PROCESSOR G B ROUTPUT ML6427 SCART/QUAD VIDEO FILTER AND DRIVER FAST BLANKING INTERVAL OR ALPHA-KEY SIGNAL D GOUTPUT BOUTPUT TO MUX OR OTHER PROCESSING FAST BLANKING INTERVAL OR ALPHA-KEY SIGNAL Q 13.5MHz/ 27MHz ML6431 GENLOCK/CLOCK GENERATOR DELAY AT 13.5MHz IS APPROXIMATELY 74ns Figure 9. Synchronizing the Filter Delay with Fast Blanking or Alpha-Key Signals in OSD Applications 2 3 4 7 8 9 10 11 12 19 GNDO CVINU/Y1 5 GND 17 VCCORGB 22 VCCOCV 6 VCC CVOUT1/YOUTA CVINFA/Y2 220µF 75Ω VIDEO CABLES CV/Y 21 330pF MODULATOR CVINFB/Y3 220µF RINA/Y4 CVOUT2/YOUTB RINB/Y5 ROUT/YOUTC GINB/Y7 GOUT/YOUTD BINA/C1 BINB/C2 SYNCIN 23 CV/Y 20 330pF ML6427 GINA/Y6 BOUT/COUT SYNCOUT 24 A/B MUX 1 75Ω 220µF MODULATOR 75Ω R/Y 18 220µF 75Ω 220µF 75Ω G/Y 16 B/C 15 SWAP CVF SWAP CVU 13 14 OPTIONAL FOR DC COUPLED APPLICATIONS H SYNC OUT INPUTS Bank A: Bank B: Other: OUTPUTS RGB, CV filtered path RGB, CV filtered path CV unfiltered path, Sync IN (slave mode) Option 1: 2 CV outputs + 2 TV modulator outputs, 1 RGB output Option 2: 2 CV outputs + 1 TV modulator output, 1 S-video output Other: Sync output (buffered stripped sync) Figure 10. Basic Application for PAL 13 ML6427 –0.5 0.35dB WITH PEAKING AMPLITUDE (dB) 0 0.5 1.7dB WITHOUT PEAKING 1 1.5 330pF 270pF 2 220pF none 2.5 0 2 1 4 3 6 5 8 7 FREQUENCY (MHz) Figure 11. NTSC/PAL Video Frequency Response With and Without Peaking Capacitor 0 AMPLITUDE (dB) 10 NTSC/PAL –38dB WITH PEAKING 20 30 NTSC/PAL –42dB WITHOUT PEAKING 330pF 40 270pF 220pF none 50 0 3 6 9 12 15 18 21 24 27 30 FREQUENCY (MHz) Figure 12. Stopband Rejection at 27MHz With and Without Peaking Capacitor 10 8ns GROUP DELAY WITHOUT PEAKING DELAY (ns) 0 13ns GROUP DELAY WITH 330pF PEAKING –10 330pF 270pF 220pF none –20 0 1 2 3 4 5 6 7 8 9 10 FREQUENCY (MHz) Figure 13. Group Delay at 5.5MHz (PAL) With and Without Peaking Capacitor 14 ML6427 LEGEND JPx MOVABLE JUMPER 5V FB1 GND C12 1µF C13 0.1µF FB2 VCCA 1 C10 1µF C11 0.1µF 2 PERMANENT SHORT 3 220µF R24 75Ω CVOUT1 220µF R23 75Ω CVOUT2 YOUT1 VCCO C14 CVIN1 6 0.1µF 17 22 19 5 U1 R1 75Ω X2 C15 CVIN2 0.1µF C16 0.1µF C17 0.1µF C18 C20 R5 75Ω JP2 1 1 FOURTH ORDER FILTER 7 8 MUX FOURTH ORDER FILTER X2 MUX FOURTH ORDER FILTER X2 MUX FOURTH ORDER FILTER X2 14 24 9 10 C19 CIN1 3 2 MUX 0.1µF R4 75Ω 0.1µF X2 3 4 R3 75Ω YIN2 11 12 0.1µF 1 13 C3 C34 CVOUT2 YOUT1 330pF 18 C4 220µF R21 75Ω YOUT2 16 P2—EVC 13 14 15 C5 220µF 15 R20 75Ω COUT1 5 4 SW1-A 23 SW1-C 5V SW1-B 5 13 17 JP3 21 2 3 1 1 GND 14 13 24 23 C21 0.1µF X2 2 JP6 3 C22 0.1µF C23 0.1µF C24 0.1µF C25 0.1µF C26 0.1µF MUX FOURTH ORDER FILTER 7 8 MUX FOURTH ORDER FILTER X2 9 10 MUX FOURTH ORDER FILTER X2 11 12 MUX FOURTH ORDER FILTER X2 R9 1kΩ BIN R10 1kΩ GIN R11 75Ω 6 C27 RIN R13 75Ω 22 19 16 2 7 3 11 20 18 16 15 19 C6 220µF R17 75Ω C7 220µF R16 75Ω C8 220µF R15 75Ω C9 220µF R14 75Ω CVOUT+ Y+ P1—SCART BOUT GOUT ROUT 5 0.1µF R12 75Ω C28 17 3 15 X2 3 4 1 21 MUX R8 1kΩ 2 JP4 U2 CIN2 R22 75Ω JP1 1 2 220µF 330pF R6 1kΩ HSYNCIN 1 C33 20 9 2 3 R7 1kΩ C2 MUX R2 75Ω YIN1 JP5 2 21 0.1µF C29 1µF C30 0.1µF VCCA C31 0.1µF C32 0.1µF VCCO Figure 14. Typical Application Schematic 15 ML6427 PHYSICAL DIMENSIONS inches (millimeters) Package: S24 24-Pin SOIC 0.600 - 0.614 (15.24 - 15.60) 24 0.291 - 0.301 0.398 - 0.412 (7.39 - 7.65) (10.11 - 10.47) PIN 1 ID 1 0.024 - 0.034 (0.61 - 0.86) (4 PLACES) 0.050 BSC (1.27 BSC) 0.095 - 0.107 (2.41 - 2.72) 0º - 8º 0.012 - 0.020 (0.30 - 0.51) 0.090 - 0.094 (2.28 - 2.39) SEATING PLANE 0.005 - 0.013 (0.13 - 0.33) 0.022 - 0.042 (0.56 - 1.07) 0.009 - 0.013 (0.22 - 0.33) ORDERING INFORMATION PART NUMBER TEMPERATURE RANGE PACKAGE ML6427CS 0°C to 70°C 24 Pin SOIC (S24) Micro Linear Corporation 2092 Concourse Drive San Jose, CA 95131 Tel: (408) 433-5200 Fax: (408) 432-0295 www.microlinear.com © Micro Linear 1999. is a registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; 5,508,570; 5,510,727; 5,523,940; 5,546,017; 5,559,470; 5,565,761; 5,592,128; 5,594,376; 5,652,479; 5,661,427; 5,663,874; 5,672,959; 5,689,167; 5,714,897; 5,717,798; 5,742,151; 5,747,977; 5,754,012; 5,757,174; 5,767,653; 5,777,514; 5,793,168; 5,798,635; 5,804,950; 5,808,455; 5,811,999; 5,818,207; 5,818,669; 5,825,165; 5,825,223; 5,838,723; 5.844,378; 5,844,941. Japan: 2,598,946; 2,619,299; 2,704,176; 2,821,714. Other patents are pending. Micro Linear makes no representations or warranties with respect to the accuracy, utility, or completeness of the contents of this publication and reserves the right to makes changes to specifications and product descriptions at any time without notice. No license, express or implied, by estoppel or otherwise, to any patents or other intellectual property rights is granted by this document. The circuits contained in this document are offered as possible applications only. Particular uses or applications may invalidate some of the specifications and/or product descriptions contained herein. The customer is urged to perform its own engineering review before deciding on a particular application. Micro Linear assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Micro Linear products including liability or warranties relating to merchantability, fitness for a particular purpose, or infringement of any intellectual property right. Micro Linear products are not designed for use in medical, life saving, or life sustaining applications. 16 DS6427-01