LM628N-6

Product Summary

The LM628N-6 is a dedicated motion-control processor. It is designed for use with a variety of DC and brushless DC servo motor, and other servomechanisms which provide a quadrature incremental position feedback signal. The part performs 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 LM628N-6 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 LM628N-6. Both 6 MHz and 8 MHz maximum frequency versions are available with the suffixes -6 and -8, respectively, used to designate the versions. The LM628N-6 incorporates an SDA core processor and cells designed by SDA.

Parametrics

LM628N-6 absolute maximum ratings: (1)Voltage at any pin with respect to GND: ?0.3V to +7.0V; (2)Ambient storage temperature: ?65°C to +150°C; (3)Lead temperature, 28-pin dual in-line package (soldering, 4 sec.): 260°C; 24-pin surface mount package (soldering, 10 sec.): 300°C; (4)Maximum power dissipation (TA ≤ 85°C, (Note 2): 605 mW; (5)ESD tolerance (CZAP = 120 pF, RZAP = 1.5k): 2000 V; (6)Temperature range: ?40°C < TA < +85°C; (7)Clock frequency:1.0 MHz < fCLK < 6.0 MHz; (8)VDD range: 4.5V < VDD < 5.5V.

Features

LM628N-6 features: (1)32-bit position, velocity, and acceleratioregisters; (2)Programmable digital PID filter with 16-bit coefficients; (3)Programmable derivative sampling interval; (4)8- or 12-bit DAC output data; (5)Internal trapezoidal velocity profile generator; (6)Velocity, target position, and filter parameters may be; (7)changed during motion; (8)Positioand velocity modes of operation; (9)Real-time programmable host interrupts; (10)8-bit parallel asynchronous host interface; (11)Quadrature incremental encoder interface with index pulse input.

Diagrams