DDC RDC-19220 Series - User Manual

®
Make sure the next
Card you purchase
has...
Data Device Corporation
105 Wilbur Place
Bohemia, New York 11716
631-567-5600 Fax: 631-567-7358
www.ddc-web.com
FOR MORE INFORMATION CONTACT:
Technical Support:
1-800-DDC-5757 ext. 7771
DESCRIPTION
The RDC-19220 Series of converters are low-cost, versatile, 16-bit
monolithic, state-of-the-art Resolver(/LVDT)-to-Digital Converters.
These single-chip converters are available in small 40-pin DDIP, or
44-pin J-Lead packages and offer programmable features such as
resolution, bandwidth and velocity output scaling.
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.
The velocity output (VEL) from the RDC-19220 Series, which can be
used to replace a tachometer, is a 4 V signal (3.5 V with the +5 V only
option) referenced to ground with a linearity of 0.75% of output voltage.
The full scale value of VEL is set by the user with a single resistor.
RDC-19220 Series converters are available with operating tempera-
ture ranges of 0° to +70°C, -40° to +85°C and -55° to +125°C. Military
processing is available (consult factory).
APPLICATIONS
With its low cost, small size, high accuracy and versatile performance,
the RDC-19220 Series converter is ideal for use in modern high-per-
formance industrial and military control systems. Typical applications
include motor control, radar antenna positioning, machine tool con-
trol, robotics, and process control. MIL-PRF-38534 processing is
available for military applications.
© 1999 Data Device Corporation
RDC-19220 SERIES
16-BIT MONOLITHIC TRACKING RESOLVER
(LVDT)-TO-DIGITAL CONVERTERS
FEATURES
•
+5 Volt Only Option
• Only Five External Passive
Components
• Programmable:
- Resolution: 10-, 12-, 14-, or 16-Bit
- Bandwidth: to 1200 Hz
- Tracking: to 2300 RPS
• Differential Resolver and LVDT
Input Modes
• Velocity Output Eliminates
Tachometer
• Built-In-Test (BIT) Output
• Small Size: 40-Pin DDIP or
44-Pin J-Lead Package
•
-55° to +125°C Operating
Temperature Available
• Programmable for LVDT input

DDC RDC-19220 Series Specifications

General

Brand	DDC
Model	RDC-19220 Series
Category	Media Converter
Language	English

Summary

Product Overview and Applications

Description

Details the RDC-19220 Series as a low-cost, versatile, 16-bit monolithic Resolver(/LVDT)-to-Digital Converter.

Applications

Highlights suitability for high-performance industrial and military control systems.

Theory of Operation and Performance Characteristics

Theory of Operation

Explains the RDC-19220's monolithic CMOS implementation and its analog/digital integration.

Transfer Function and Bode Plot

Details the open-loop transfer function and Bode plots for analyzing dynamic performance.

Tracking Rates and Carrier Frequencies

Discusses factors affecting tracking rate and carrier frequency, and how to increase them.

Setup, Configuration, and Error Management

General Setup Considerations

Provides critical recommendations for installation, power supplies, grounding, and external components.

Typical Input Connections

Illustrates typical connection configurations for resolver inputs, including 2V and X-Volt types.

Velocity Trimming

Details external setups for trimming velocity scaling, reversal error, and offset parameters.

Additional Error Sources

Explains sources of error like quadrature voltage, phase shift, and timing glitches.

Special Modes and Features

LVDT Mode Operation

Details operation as an LVDT-to-digital converter, including input scaling and output coding.

Built-In-Test (BIT) Functionality

Explains the BIT output for monitoring error levels, over-velocity, and loss-of-signal.

Encoder Emulation Capabilities

Covers configuring the RDC-19220 to emulate incremental optical encoder outputs.

Supporting Information and Ordering

Pinout Functions and Circuit Examples

Provides pinout tables for RDC-19220/22 models and illustrates typical -5V circuit examples.

Ordering Information

Details the part number structure for supplemental process requirements, accuracy, and package options.

Thin Film Resistor Networks

Describes DDC's custom thin film resistor networks for matched Sin/Cos input voltages, minimizing digital error.