Tracking R/D Converter High Accuracy Velocity Output High Max Tracking Rate 1040 RPS (10 Bits) 44-Lead PLCC Package 10-, 12-, 14-, or 16-Bit Resolution Set by User Ratiometric Conversion Stabilized Velocity Reference Dynamic Performance Set by User Industrial Temperature Range APPLICATIONS DC and AC Servo Motor Control Process Control Numerical Control of Machine Tools Robotics Axis Contro

GENERAL DESCRIPTION

The AD2S83 is a monolithic 10-, 12-, 14-, or 16-bit tracking resolver-to-digital converter. The converter allows users to select their own resolution and dynamic performance with external components. The converter allows users to select the resolution to be 10, 12, 14, or 16 bits and to track resolver signals rotating at up to 1040 revs per second (62,400 rpm) when set to 10-bit resolution. The AD2S83 converts resolver format input signals into a parallel natural binary digital word using a ratiometric tracking conversion method. This ensures high noise immunity and tolerance of long leads allowing the converter to be located remote from the resolver. The position output from the converter is presented via 3-state output pins which can be configured for operations with 8- or 16-bit bus. BYTE SELECT, ENABLE and INHIBIT pins ensure easy data transfer to 8- and 16-bit data bus, and outputs are provided to allow for cycle or pitch counting in external counters. A precise analog signal proportional to velocity is also available and will replace a tachogenerator. The AD2S83 operates over reference frequencies in the range 0 Hz to 20,000 Hz.

PRODUCT HIGHLIGHTS

High Accuracy Velocity Output. A precision analog velocity signal with a typical linearity of ±0.1% and reversion error less than ±0.3% is generated by the AD2S83. The provision of this signal removes the need for mechanical tachogenerators used in servo systems to provide loop stabilization and speed control. Resolution Set by User. Two control pins are used to select the resolution of the AD2S83 to be 10, 12, 14 or 16 bits allowing optimum resolution for each application. Ratiometric Tracking Conversion. This technique provides continuous output position data without conversion delay. It also provides noise immunity and tolerance of harmonic distortion on the reference and input signals. Dynamic Performance Set by the User. By selecting external resistor and capacitor values the user can determine bandwidth, maximum tracking rate and velocity scaling of the converter to match the system requirements. The component values are easy to select using the free component selection software design aid. MODELS AVAILABLE Information on the models available is given in the Ordering Guide.

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