75 Quad Video Cable Drivers and Filters with Switchable Inputs - Micro Linear
Description
August 1999 PRELIMINARY
ML6429 75W Quad Video Cable Drivers and Filters with Switchable Inputs
GENERAL DESCRIPTION
The ML6429 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 ML6429, where they are DC restored.
Outputs are AC coupled, and drive 2VP-P into a 150W load.
The ML6429 can be used with 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 ML6429s can be arranged in a master-slave configuration where an external sync can be used for CV and RGB outputs.
FEATURES
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Cable drivers for Peritel (SCART), Enhanced Video Connector (EVC), and standard video connectors, 75W cable drivers for CV, S-video, and RGB 7.
1MHz cutoffs CV, RGB, and S-video, NTSC or PAL filters with mux inputs and output channel mux 7.
1MHz to 8.
4MHz cutoffs achievable with peaking capacitor Quad 4th-order reconstruction or dual anti-aliasing filter 41dB stopband attenuation at 27MHz, 0.
5dB flatness up to 4.
5MHz 12ns group delay flatness up to 10MHz 0.
4% differential gain, 0.
4º differential phase on all channels, 0.
4% total harmonic distortion on all channels 2kV ESD guaranteed Master-slave configuration allows up to 8 multiplexed, filtered output signals
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BLOCK DIAGRAM
17 2 CVINF/Y1* REQUIRED SYNC STRIP FILTERED CHANNEL 4th-ORDER FILTER VCCORGB
+ –
22 VCCOCV
6 VCC SWAP CVF
14
13 SWAP CVU
SYNCIN 23 SYNCOUT 24 3 4 7 8 9 10 11 12 CVINUA/Y2* CVINUB/Y3* RINA/Y4 RINB/Y5 GINA/Y6 GINB/Y7 BINA/C1 BINB/C2 A/B MUX 1 MUX MUX ...
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