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33970 Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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33970 Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
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1 / 36 page  Document Number: MC33970 Rev. 3.0, 1/2007 Freescale Semiconductor Advance Information * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. © Freescale Semiconductor, Inc., 2007. All rights reserved. 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. The 33970 is ideal for use in automotive instrumentation systems requiring distributed and flexible step motor gauge driving. The device also eases the transition to step motors from air core motors by emulating the air core pointer movement with little additional processor bandwidth utilization. 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 Figure 1. 33970 Simplified Application Diagram IMPROVED GAUGE DRIVER INTEGRATED CIRCUIT DW SUFFIX EG SUFFIX (Pb-FREE) 98ASB42344B 24-PIN SOICW 33970 ORDERING INFORMATION Device Temperature Range (TA) Package MC33970DW/R2 -40°C to 125°C 24 SOICW MCZ33970EG/R2 5.0 V Regulator MCU V PWR VPWR 33970 V DD VDD RTZ RST CS SCLK SI SO GND Motor 0 SIN0+ SIN0- COS0+ COS0- Motor 1 SIN1+ SIN1- COS1+ COS1- |
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