LM98714 Datasheet | National Semiconductor

Description The LM98714 is a fully integrated, high performance 16-Bit, 45 MSPS signal processing solution for digital color copiers, scanners, and other image processing applications. Highspeed signal throughput is achieved with an innovative architecture utilizing Correlated Double Sampling (CDS), typically employed with CCD arrays, or Sample and Hold (S/H) inputs (for Contact Image Sensors and CMOS image sensors). The signal paths utilize 8 bit Programmable Gain Amplifiers (PGA), a +/-9-Bit offset correction DAC and independently controlled Digital Black Level correction loops for each input. The PGA and offset DAC are programmed independently allowing unique values of gain and offset for each of the three inputs. The signals are then routed to a 45MHz high performance analog-to-digital converter (ADC). The fully differential processing channel shows exceptional noise immunity, having a very low noise floor of -74d B. The 16-bit ADC has excellent dynamic performance making the LM98714 transparent in the image reproduction chain. n n n n Independent Gain/Offset Correction for Each Channel Digital Black Level Correction Loop for Each Channel Programmable Input Clamp Voltage Flexible CCD/CIS Sensor Timing Generator Key Specifications n n n n n n n n n n n n n n n n 1.2 or 2.4 Volt Modes (both with + or - polarity option) ADC Resolution 16-Bit ADC Sampling Rate 45 MSPS INL +/- 23 LSB (typ) Channel Sampling Rate 15/22.5/30 MSPS PGA Gain Steps 256 Steps PGA Gain Range 0.7 to 7.84x Analog DAC Resolution +/-9 Bits Analog DAC Range +/-300m V or +/-600m V Digital DAC Resolution +/-6 Bits Digital DAC Range -1024 LSB to + 1008 LSB SNR -74d B (@0d B PGA Gain) Power Dissipation 505m W (LVDS) 610m W (CMOS) Operating Temp 0 to 70˚C Supply Voltage 3.3V Nominal (3.0V to 3.6V range) Maximum Input Level Applications n n n n Multi-Function Peripherals Facsimile Equipment Flatbed or Handheld Color Scanners High-speed Document Scanner Features n LVDS/CMOS Outputs n LVDS/CMOS Pixel Rate...