LM98519VHB

LM98519 - 10-bit 65 MSPS 6 Channel Imaging Signal Processor February 21, 2008 LM98519 10-bit 65 MSPS 6 Channel Imaging Signal Processor General Description 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. Highspeed signal throughput is achieved with an innovative six channel architecture utilizing Correlated Double Sampling (CDS), or Sample and Hold (SH) type sampling. 1x or 2x gain settings are available in the CDS/SH input stage. Each channel has a dedicated 1x to 10x (8 bit) PGA that allows accurate gain adjustment of each channel. The Digital White Level auto calibration loop can automatically set the PGA value to achieve a selected white target level. Each channel also has a ±4 bit coarse and ±10-bit fine analog offset correction DAC that allows offset correction before the sample-and-hold amplifier. These correction values can be controlled by an automated Digital Black Level correction loop. The PGA and offset DACs for each channel are programmed independently allowing unique values of gain and offset for each of the six channels. A 2-to-1 multiplexing scheme routes the signals to three 65MHz high performance ADCs. The fully differential processing channels achieve exceptional noise immunity, having a very low noise floor of -68dB. The 10-bit analog-todigital converters have excellent dynamic performance making the LM98519 transparent in the image reproduction chain. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 3.3V Single Supply Operation CDS or S/H Processing with Negative Input Signal Polarity 32.5 MHz Channel Rate Enhanced ESD Protection on Timing and Control Pins Low Power CMOS Design 4-Wire Serial interface 2 Channel Symmetrical Architecture Independent Gain & Offset Correction for each Channel Digital Black Level Calibration for each Channel Digital White Level Calibration for each Channel Programmable Input Clamp Key Specifications ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Maximum Input Level Input Sample Rate PGA Gain Range CDS/SH Gain Settings Total Channel Gain PGA Gain Resolution ADC Resolution ADC Sampling Rate SNR Offset DAC Range Offset DAC Resolution Supply voltage Power Dissipation 1.19 Vp-p (CDS gain = 1.0) 0.58 Vp-p (CDS gain = 2.1) 5 to 32.5 MSPS - 6ch mode 10 to 32.5 MSPS - 3ch mode 1x to 10x (0 to 20 dB) 1x or 2.1x 1x to 20x (0 to 26 dB) 8 bits - Analog 10 bits 10 to 65 MSPS 68 dB (Gain = 1x) ±111 mV or ±60 mV- FDAC ±277 mV - CDAC ±10 bits - FDAC ±4 bits - CDAC 3.0V to 3.6V 1.04 W (typical) © 2008 National Semiconductor Corporation 300322 www.national.com LM98519 Chip Block Diagram 30032201 www.national.com 2 LM98519 Channel Block Diagram 30032202 Ordering Information Commercial Temperature Range LM98519VHB NS Package 80-Pin TQFP 3 www.national.com LM98519 Physical Dimensions inches (millimeters) unless otherwise noted 80-Lead TQFP NS Package Number VHB80A www.national.com 4 LM98519 Notes 5 www.national.com LM98519 - 10-bit 65 MSPS 6 Channel Imaging Signal Processor Notes For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers Audio Clock Conditioners Data Converters Displays Ethernet Interface LVDS Power Management Switching Regulators LDOs LED Lighting PowerWise Serial Digital Interface (SDI) Temperature Sensors Wireless (PLL/VCO) www.national.com/amplifiers www.national.com/audio www.national.com/timing www.national.com/adc www.national.com/displays www.national.com/ethernet www.national.com/interface www.national.com/lvds www.national.com/power www.national.com/switchers www.national.com/ldo www.national.com/led www.national.com/powerwise www.national.com/sdi www.national.com/tempsensors www.national.com/wireless WEBENCH Analog University App Notes Distributors Green Compliance Packaging Design Support www.national.com/webench www.national.com/AU www.national.com/appnotes www.national.com/contacts www.national.com/quality/green www.national.com/packaging www.national.com/quality www.national.com/refdesigns www.national.com/feedback Quality and Reliability Reference Designs Feedback THE CONTENTS OF THIS DOCUMENT ARE PROVIDED IN CONNECTION WITH NATIONAL SEMICONDUCTOR CORPORATION (“NATIONAL”) PRODUCTS. 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