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LM628 - Precision Motion Controller

Description

The LM628/LM629 are dedicated motion-control processors designed for use with a variety of DC and brushless DC servo motors, and other servomechanisms which provide a quadrature incremental position feedback signal.

Features

  • n n n n n n n n n n n n 32-bit position, velocity, and acceleration registers Programmable digital PID filter with 16-bit coefficients Programmable derivative sampling interval 8- or 12-bit DAC output data (LM628) 8-bit sign-magnitude PWM output data (LM629) Internal trapezoidal velocity profile generator Velocity, target position, and filter parameters may be changed during motion Position and velocity modes of operation Real-time programmable host interrupts 8-bit parallel asynchronous host in.

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Datasheet Details

Part number LM628
Manufacturer National Semiconductor
File Size 630.44 KB
Description Precision Motion Controller
Datasheet download datasheet LM628 Datasheet
Additional preview pages of the LM628 datasheet.

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Full PDF Text Transcription

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LM628/LM629 Precision Motion Controller November 1999 LM628/LM629 Precision Motion Controller General Description The LM628/LM629 are dedicated motion-control processors designed for use with a variety of DC and brushless DC servo motors, and other servomechanisms which provide a quadrature incremental position feedback signal. The parts perform the intensive, real-time computational tasks required for high performance digital motion control. The host control software interface is facilitated by a high-level command set. The LM628 has an 8-bit output which can drive either an 8-bit or a 12-bit DAC. The components required to build a servo system are reduced to the DC motor/actuator, an incremental encoder, a DAC, a power amplifier, and the LM628.
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