LM98640QML
LM98640QML is 40 MSPS Analog Front-End manufactured by National Semiconductor Corporation.
Description
The LM98640QML is a fully integrated, high performance 14Bit, 5 MSPS to 40 MSPS signal processing solution for image processing applications. The LM98640QML is Radiation tolerant up to a total ionizing dose of 100krads allowing it to be used in space imaging applications. Configuration Registers are Single Event Functional Interrupt Free up to 120 Me Vcm2/mg. The Serial LVDS Output format performs well during ionizing doses, preventing data loss. The LM98640QML has an adaptive power scaling feature to optimize power consumption based on the operating frequency and amount of gain required. High-speed 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 sampling edges are programmable to a resolution of 1/64th of a pixel period. Both the CDS and S/H have a programmable gain of either 0d B or 6d B. The signal paths utilize two ±8 bit offset correction DACs for coarse and fine offset correction, and 8 bit Programmable Gain Amplifiers (PGA) for each channel. The PGA and offset DAC are programmed independently allowing unique values of gain and offset for each input. The signals are then routed to two on chip 14-bit 40MHz high performance analog-to-digital converters (ADC). The fully differential processing channel provides exceptional noise immunity, having a very low noise floor of -79d B with a gain of 1x. The 14-bit ADCs have excellent dynamic performance making the LM98640QML transparent in the image reproduction chain.
Features
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Total Ionizing Dose 100 krad(Si) Single Event Latch-Up free up to 120 Me V-cm2/mg SEFI free up to 120 Me V-cm2/mg Seialized LVDS Outputs LVDS Input Clock CDS or S/H Processing for CCD or CIS sensors Programmable Analog Gain for Each Channel Programmable Analog Offset Correction Programmable Input Clamp Voltage Programmable Sampling Edge up...
