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产品信息
FEATURES FUNCTIONAL BLOCK DIAGRAM
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 Control
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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