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LM628N-6/NOPB
Precision Motion Controller 28-PDIP -40 to 85
LM628, LM629
www.ti.com SNVS781C –JUNE 1999–REVISED MARCH 2013
LM628/LM629 Precision Motion Controller
Checkfor Samples: LM628, LM629
1FEATURES DESCRIPTIONThe LM628/LM629 are dedicated motion-control
32-bit Position, Velocity, And Acceleration processors designed for use witha varietyof DC and
Registers brushless DC servo motors, and other
• Programmable Digital PID Filter with 16-bit servomechanisms which provide a quadrature
Coefficients incremental position feedback signal. The parts
perform the intensive, real-time computational tasks
• Programmable Derivative Sampling Intervalrequired for high performance digital motion control.
• 8-or 12-bit DAC Output Data (LM628) The host control software interfaceis facilitated bya
• 8-bit Sign-magnitude PWM Output Data high-level command set. The LM628 has an 8-bit
(LM629) output which can drive either an 8-bitora 12-bit
DAC. The components required to builda servo
• Internal Trapezoidal Velocity Profile Generatorsystem are reducedto the DC motor/actuator, an
• Velocity, Target Position, and Filter incremental encoder,a DAC,a power amplifier, and
Parameters may be Changed During Motion the LM628. An LM629-based system is similar,
• Position and Velocity Modesof Operation except thatit provides an 8-bit PWM output for
directly driving H-switches. The parts are fabricatedin
• Real-time Programmable Host InterruptsNMOS and packagedina 28-pin dual in-line package
• 8-bit Parallel Asynchronous Host Interface ora SOIC-24 package (LM629 only). Both6 MHz and
• Quadrature Incremental Encoder Interface with 8 MHz maximum frequency versions are available
Index Pulse Input with the suffixes -6 and -8, respectively, used to
designate the versions. They incorporate an SDA
• Availableina 28-pin Dual In-line Packageora core processor and cells designedby SDA.
SOIC-24 Package (LM629 Only)1. Block