LM98501 Datasheet | National Semiconductor

Description The LM98501 is a CCD signal processor for electronic cameras. The processor provides a mon interface to a number of different image sensors including CCD, CMOS, and CIS. Correlated double sampling reduces k TC noise from the image signal. A fast, temperature stable, 8-bit digitally programmable gain amplifier enables pixel-rate white-balancing. An auxiliary input is provided, allowing for the selection of an external signal, useful for electronic titling and video overlay. The 10-bit A/D converter preserves the image quality with excellent noise performance. The LM98501 also includes the supporting functions of digital black level clamp and power down, ideally suited for portable video applications. This low-power processor is a natural choice for the most demanding imaging systems. Features n n n n n n n n n +3V single power supply Low power CMOS design 4-wire serial interface 2.5V data output voltage swing No missing codes AUX input with input clamp and programmable gain Four color gain and offset registers Digital black level clamp Small 48-lead LQFP package Key Specifications j Maximum Input Level j CDS Sampling Rate j PGA Gain Steps j PGA Gain Range j ADC Resolution j ADC Sampling Rate j - Signal-to-Noise Ratio j Power Dissipation AV+ = DV+ = DV+ I/O = 3.0V j Operating Temperature Applications n n n n n n n n Digital still camera Digital video camcorder Video conferencing Security camera Plain paper copier Flatbed or handheld color scanner Video processing for x-ray or infrared Barcode scanner 1.0V peak-peak 27 MSPS 256 Steps 0.0 d B-32.0 d B 10-Bit 27 MSPS 60 d B 0 d B Gain, 1.0V Input 195 m W (typical) 0˚C to 70˚C - 20 log10 (VIN/RMS Output Noise) Typical Digital Camera Block Diagram DS101292-1 © 2000 National Semiconductor Corporation DS101292 .national. Overall Chip Block Diagram DS101292-2 FIGURE 1. Chip Block Diagram LM98501 Chip Pin Out DS101292-3 FIGURE 2. Pin Out Diagram Ordering Information mercial (0˚C ≤ TA ≤ +70˚C)...