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 LM628/LM629 are dedicated motion‑control processors designed for use with DC and brushless DC servo motors and other servomechanisms that provide quadrature incremental position feedback. The manual describes the high‑level command set, output options (8‑bit parallel or 12‑bit DAC for LM628, 8‑bit PWM for LM629), and the required system components such as encoder, DAC, and power amplifier.
Detailed sections cover absolute maximum ratings, electrical characteristics, pinout, theory of operation, system specifications, command set, typical applications, physical dimensions, and life‑support policy. The document serves as a comprehensive guide for engineers integrating the LM628/LM629 into motion‑control systems.
| Package Options | 28‑pin dual in‑line (N) or 24‑pin surface‑mount (M) |
|---|---|
| Supply Voltage (VDD) | 4.5 V to 5.5 V |
| Maximum Clock Frequency | 6 MHz (‑6) or 8 MHz (‑8) |
| Position Range | −1,073,741,824 to 1,073,741,823 counts |
The LM628 provides an 8‑bit output that can drive either an 8‑bit or a 12‑bit DAC.
The devices operate with a supply voltage (VDD) between 4.5 V and 5.5 V.
The –6 versions run up to 6 MHz, while the –8 versions run up to 8 MHz.