ad7264具有PGA和四比较器的SAR模数转换器数据表

　　The AD7264 is a dual， 14-bit， high speed， low power， successive approximation ADC that operates from a single 5 V power supply and features throughput rates of up to 1 MSPS per on-chip ADC （500 kSPS for the AD7264-5）。 Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential analog input with a PGA. There are 14 gain settings available： ×1， ×2， ×3， ×4， ×6， ×8， ×12， ×16， ×24， ×32， ×48， ×64， ×96， and ×128. The AD7264 contains four comparators. Comparator A and Comparator B are optimized for low power， whereas Comparator C and Comparator D have fast propagation delays. The AD7264 features a calibration function to remove any device offset error and programmable gain adjust registers to allow input path （for example， sensor） offset and gain compensation. The AD7264 has an on-chip 2.5 V reference that can be disabled if an external reference is preferred. The AD7264 is available in 48-lead LFCSP and LQFP packages. The AD7264 is ideally suited for monitoring small amplitude signals from a variety of sensors. The devices include all the functionality needed for monitoring the position feedback signals from a variety of analog encoders used in motor control systems.