MB1SPCB;MB1SA2V-01;MB1SA2V;中文规格书,Datasheet资料.pdf

MB1S(MB1SA2V)/MB1SA20V Single Board Precision DVM with direct PC Interface The ALD MB1S is a precision +/-5½-digit Digital Voltmeter (DVM) printed circuit board that contains the ALD500R/ALD521D A/D Converter chipset that directly plugs into the parallel printer port of a PC computer. It features calibrated analog input (w/scalable input ranges), and digital circuitry to communicate with PC or other microprocessors. It is designed to be used as a stand-alone, embedded system component in a variety of applications including digital panel meters, customized instrumentation displays, temperature monitoring, high resolution DVM’s, weigh scales and others. Direct Full-scale analog input range is +/-2.00000V DC with a linearity of 0.005%. ALDs 18-bit plus sign integrating dual-slope analog processor (ALD500) functions as the input device and the ALD521D microprocessor IC implements the digital conversion, control mode and I/O functions. The MB1S supports two optional versions, each populated with different components and configurations: Mode A – calibrated reference used primarily for measurements against a calibrated reference voltage typically required in precision voltmeter applications. Mode A is the default version of MB1S. Mode B – ratio-metric intended for measurements against a ratio-metric reference voltage, such as those required in weigh scale applications. Mode B is a simple application specific adaptation of th