33970

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MIL Type : MIL-DTL-38999
Product Type : Connectors


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




Specifications

Ratings	Symbol	Value	Unit
ELECTRICAL RATINGS
Power Supply Voltage Steady State Input Pin Voltage (1) SIN +/- COS +/- Continuous Per Output Current (2) ESD Voltage (3) Human Body Model Machine Model	VPWR(SUS) VIN IOUTMAX VESD1 VESD2	-0.3 to 41 -0.3 to 7.0 40 ±2000 ±200	V V mA V
THERMAL RATINGS
Storage Temperature Operating Junction Temperature Thermal Resistance Junction to Ambient Junction to Lead	TSTG TJ RJA RJL	-55 to 150 -40 to 150 60 20	/W
THERMAL RESISTANCE
Peak Package Reflow Temperature During Reflow (4), (5)	TPPRT	Note 5

Description

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.