12位1MSPS采样SAR ADC的PGA和四个比较器AD7262数据表

　　The AD7262/AD7262-5 are dual， 12-bit， high speed， low power， successive approximation ADCsthat operate from a single 5 V powersupply. The AD7262 features throughput rates of up to 1 MSPS per on-chipADC. The AD7262-5 features throughput rates of up to 500 kSPS. 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. TheAD7262/AD7262-5 contain four comparators. ComparatorA and Comparator B are optimized for low power， while Comparator C and Comparator D have fast propagation delays. The AD7262/AD7262-5 feature a calibration function to remove any device offset error and programmable gain adjust registers to allow for input path （for example，sensor） offset and gain compensation. The AD7262/AD7262-5 have an on-chip 2.5 V reference that can be disabled if an external reference is preferred. The AD7262/AD7262-5 are ideally suited for monitoring small amplitude signalsfrom a variety of sensors. They include all the functionality needed for monitoring the position feedback signals from a variety of analog encoders used in motor control systems.