Signal acquisition device that can extend

The utility model discloses a signal acquisition device that can extend belongs to electron technical field, select electronic switching circuit, high accuracy AD chip, low precision AD chip and maincontrol chip including incoming signal electronic switching circuit, precision, solved quick switching multichannel analog signal to automatic selection height precision converting circuit's technicalproblem, the utility model discloses only need produce a PCB when batch production, high accuracy AD chip and low precision AD chip only need weld one can, main control chip accessible control accuracy selects electronic switching circuit to realize selecting high accuracy AD chip and low precision AD chip to handle analog signal, has saved manufacturing cost greatly. 本实用新型公开了种可拓展的信号采集设备，属于电子技术领域，包括输入信号电子开关电路、精度选择电子开关电路、高精度AD芯片、低精度AD芯片和主控芯片，解决了快速转换多路模拟量信号，并自动选择高低精度转换电路的技术问题；本实用新型在批量生产时只需要生产种PCB，高精度AD芯片和低精度AD芯片只需要焊接个即可，主控芯片可通过控制精度选择电子开关电路实现选择高精度AD芯片和低精度AD芯片处理模拟量信号，大大节省了生产成本。