Key facts
- Model
- LM628
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-08
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National Semiconductor LM628/LM629 Precision Motion Controller User Manual
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.
National Semiconductor LM628 specifications
| 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 |
Source: National Semiconductor LM628/LM629 Precision Motion Controller User Manual
All National Semiconductor LM628 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What output does the LM628 provide?
The LM628 provides an 8‑bit output that can drive either an 8‑bit or a 12‑bit DAC.
From: National Semiconductor LM628/LM629 Precision Motion Controller User Manual
What is the supply voltage range for the LM628/LM629?
The devices operate with a supply voltage (VDD) between 4.5 V and 5.5 V.
From: National Semiconductor LM628/LM629 Precision Motion Controller User Manual