Dual Gauge Driver with Configurable Response Time

The 33976 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 or Switec MS-X15.xxx motor.

FEATUREs
• MMT-Licensed Two-Phase Step Motor Compatible
• Switec MS-X15.xxx Step Motor Compatible
• Minimal Processor Overhead Required
• Fully Integrated Pointer Movement and Position State Machine with Channel-Independent Configurable Pointer Movement
• 4096 Possible Steady State Pointer Positions
• 340° Maximum Pointer Sweep
• Maximum Acceleration of 4500°/s2
• Maximum Pointer Velocity of 400°/s
• Analog Microstepping (12 Steps/Degree of Pointer Movement)
• Pointer Calibration and Return to Zero (RTZ)
• SPI-Controlled 16-Bit Word
• Calibratable Internal Clock
• Low Sleep Mode Current
• Pb-Free Packaging Designated by Suffix Code EG