ICS1531

Integrated Circuit Systems, Inc. ICS1531 1531 General Description The ICS1531 is a high-performance, cost-effective, 3-channel, 8-bit analog-to-digital converter with an integrated line-locked clock generator. It is part of a family of chips intended for high-resolution video applications that use analog inputs, such as LCD monitors, LCD projectors, plasma displays, and projection TVs. Using ICS's low-voltage CMOS mixed-signal technology, the ICS1531 is an effective data-capture solution for resolutions from VGA to UXGA. The ICS1531 offers analog-to-digital data conversion and synchronized pixel clock generation at speeds of 100, 140, or 165 MHz (or mega samples per second, MSPS). The Dynamic Phase Adjust (DPA) circuitry allows end-user control over the pixel clock phase, relative to the recovered sync signal and analog pixel data. Either the internal pixel clock can be used as a capture clock input to the analog-to-digital converters or an external clock input can be used. The ICS1531 provides either one or two 24-bit pixels per clock. An ADCSYNC output pin provides recovered HSYNC from the pixel clock phase-locked-loop (PLL) divider chain output, which can be used to synchronize display enable output. A clamp signal can be generated internally or provided through the CLAMP pin. A high-bandwidth video amplifier with adjustable gain allows fine tuning of the analog signal. The advanced PLL uses an internal programmable feedback divider. Two additional, independent programmab...