RDC19222-202

The RDC19222-202 is one member of the RDC19222 series.The RDC-19222 Series of converters are low-cost, versatile, 16-bit monolithic, state-of-the-art Resolver(/LVDT)-to-Digital Converters.These single-chip converters of RDC19222-202 are available in small 40-pin DDIP, 44-pin J-Lead, and 44-pin MQFP packages and offer programmable features such as resolution, bandwidth and velocity output scaling.

Features of the RDC19222 are:(1)only five external passive components;(2)velocity output eliminates tachometer;(3)differential resolver and LVDT input modes;(4)small size: available in DDIP,PLCC or MQFP packages;(5)programmable for LVDT input.Resolution programming allows selection of 10-, 12-, 14-, or 16-bit,with accuracies to 2.3 min. This feature combines the high tracking rate of a 10-bit converter with the precision and low-speed velocity resolution of a 16-bit converter in one package.

With RDC19222-202 low cost, small size, high accuracy and versatile performance,the RDC-19222 Series converter is ideal for use in modern high-performance industrial and military control systems.Typical applications include motor control, radar antenna positioning, machine tool control, robotics, and process control. MIL-PRF-38534 processing is available for military applications.The RDC-19222 Series of converters are single CMOS custom monolithic chips.They are implemented using the latest IC technology which merges precision analog circuitry with digital logic to form a complete, high-performance tracking Resolver-to-Digital converter. For user flexibility and convenience, the converter bandwidth, dynamics and velocity scaling are externally set with passive components.The converter accuracy is limited by the precision of the computing elements in the CT. For enhanced accuracy, the CT in these converters uses capacitors in precision ratios, instead of the more conventional precision resistor ratios.Capacitors, used as computing elements with op-amps, need to be sampled to eliminate voltage drifting.Therefore, the circuits RDC19222-202 are sampled at a high rate (67 kHz) to eliminate this drifting and at the same time to cancel out the op-amp offsets.