LM629M-8

LM628, LM629 www.ti.com SNVS781C – JUNE 1999 – REVISED MARCH 2013 LM628/LM629 Precision Motion Controller Check for Samples: LM628, LM629 FEATURES 1 2 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 Interface Quadrature Incremental Encoder Interface with Index Pulse Input Available in a 28-pin Dual In-line Package or a SOIC-24 Package (LM629 Only) 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. An LM629-based system is similar, except ...