资 源 简 介
The LM98519 is a fully integrated, high performance 10-Bit,65 MSPS signal processing soluTIon for digital color copiers,scanners, and other image processing applicaTIons. Highspeedsignal throughput is achieved with an innovaTIve sixchannel architecture uTIlizing Correlated Double Sampling(CDS), or Sample and Hold (SH) type sampling. 1x or 2x gainsettings are available in the CDS/SH input stage. Each channelhas a dedicated 1x to 10x (8 bit) PGA that allows accurategain adjustment of each channel. The Digital White Level autocalibration loop can automatically set the PGA value toachieve a selected white target level. Each channel also hasa ±4 bit coarse and ±10-bit fine analog offset correction DACthat allows offset correction before the sample-and-hold amplifier.These correction values can be controlled by an automatedDigital Black Level correction loop. The PGA and offsetDACs for each channel are programmed independently allowingunique values of gain and offset for each of the sixchannels. A 2-to-1 multiplexing scheme routes the signals tothree 65MHz high performance ADCs. The fully differentialprocessing channels achieve exceptional noise immunity,having a very low noise floor of -68dB. The 10-bit analog-todigitalconverters have excellent dynamic performance makingthe LM98519 transparent in the image reproduction chain.
