ML6411

September 1999 PRELIMINARY ML6411 Programmable Video Digitizer with Selectable Gain and Clamps GENERAL DESCRIPTION The ML6411 is a Dual Video A/D converter, incorporating two input sample and holds, two high speed 8-Bit A/D converters, programmable gain control, selectable clamps, multi-phase clocking, and reference voltage generation. The ML6411 can be used to convert the following analog signals to digital signals: two composite channels or Svideo channel. All inputs are provided with appropriate input selectable clamps to establish DC level. The clamps are full DC restore circuits with the A-to-D converters in each respective correction loop. The clamps are selectable to 16, 24, 64, and 128. The programmable gain control provides various possibilities to select and adjust the gain via two separate mechanisms: Sync-Suppressed Gain Control (SGC ) for sync suppressed video such as RGB, and User Gain Control (UGC) for video formats that require scalable gain settings. Each of these can be programmed through a serial bus. FEATURES s s Complete video digitizer for Y/C and CV video Contains A/D’s with scalable gain, selectable clamps, and clock generation (programmable via serial bus) Two 8-Bit +/- ½ LSB Differential Non-Linearity with 30MHz guaranteed conversion Two Gain Control Mechanisms for programmable or sync-suppressed video gain control Selectable Video Clamping: 16, 24, 64, 128 Selectable Video Gain: 3dB to –6dB Operating total power dissipation less than 425mW Power ...