Dual Gauge Driver Integrated Circuit with Improved Damping Algorithms

This 33970 is a single-packaged, Serial Peripheral Interface (SPI) controlled, dual step motor gauge driver integrated circuit (IC). This monolithic IC consists of four dual output H-Bridge coil drivers and the associated control logic. Each pair of H-Bridge drivers is used to automatically control the speed, direction, and magnitude of current through the two coils of a two-phase instrumentation step motor, similar to an MMT-licensed AFIC 6405.

特性 Features

? MMT-Licensed Two-Phase Step Motor Compatible

? Minimal Processor Overhead Required

? Fully Integrated Pointer Movement and Position State Machine with Air Core Movement Emulation

? 4096 Possible Steady State Pointer Positions

? 340° Maximum Pointer Sweep

? Fixed Maximum Acceleration and Deceleration of 4500°/s2

? Maximum Pointer Velocity of 400°/s

? Analog Microstepping (12 Steps/Degree of Pointer Movement)

? Pointer Calibration and Return to Zero

? SPI-Controlled 16-Bit Word

? Calibratable Internal Clock

? Low Sleep Mode Current

? Backward Compatible with MC33991

? Improved Pointer Movement, Diagnostics, and Return to Zero (RTZ)

? Pb-Free Packaging Designated by Suffix Code EG