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ML6427CS Datasheet(PDF) 1 Page - Micro Linear Corporation |
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ML6427CS Datasheet(HTML) 1 Page - Micro Linear Corporation |
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1 / 16 page  August 1999 PRELIMINARY ML6427 75 W Quad Video Cable Drivers and Filters with Switchable Inputs 1 GENERAL DESCRIPTION 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. 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. 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. Several ML6427s can be arranged in a master-slave configuration where an external sync can be used for CV and RGB outputs. BLOCK DIAGRAM FEATURES s Cable drivers for Peritel (SCART), Enhanced Video Connector (EVC), and standard video connectors, 75 W cable drivers for CV, S-video, and RGB s 7.1MHz CV, RGB, and S-video, NTSC or PAL filters with mux inputs and output channel mux s Quad reconstruction filter or dual anti-aliasing filter s 43dB stopband attenuation at 27MHz s 1dB flatness up to 4.8MHz s 12ns group delay flatness up to 10MHz s 0.4% differential gain, 0.4º differential phase on all channels s 0.4% total harmonic distortion on all channels s Master-slave configuration allows up to 8 multiplexed, filtered output signals A/B MUX 1 12 BINA/C1 BINB/C2 BOUT/COUT GND GNDO 11 GINB/Y2 10 GINA/Y6 9 RINB/Y5 8 RINA/Y4 7 CVINFB/Y3* 4 CVINFA/Y2* 3 SYNCOUT MUX MUX MUX SWAP MUX MUX 15 GOUT/YOUTD 16 ROUT/YOUTC 18 CVOUT/YOUTB 20 CVOUT1/YOUTA 21 5 19 4th-ORDER FILTER TRANSCONDUCTANCE ERROR AMP TRANSCONDUCTANCE ERROR AMP UNFILTERED CHANNEL SWAP CVF SWAP CVU VCC VCCOCV REQUIRED SYNC STRIP SYNC TIMER SYNC TIMER 24 22 VCCORGB 17 6 13 14 SYNCIN 23 SYNCIN 2 + – 0.5V + – 0.5V 4th-ORDER FILTER TRANSCONDUCTANCE ERROR AMP + – 0.5V 4th-ORDER FILTER TRANSCONDUCTANCE ERROR AMP + – 0.5V 4th-ORDER FILTER TRANSCONDUCTANCE ERROR AMP *CAN ALSO INPUT SYNC ON GREEN SIGNALS + – 0.75V ×2 ×2 ×2 ×2 ×2 |
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