FEATURES
• Complete Microstepping Control
System in the following packages:
- 68 Pin PLCC (IM2000P)
- 80 Pin QFP (IM2000F)
- 64 Pin QFP (IM2000S)
• Up to 10MHz Step Clock Rate
• Internal Sine/Cosine Generator
• PWM Phase Current Control
• Minimal External Components
• Automatic Current Reduction
• 14 Selectable Resolutions —
Both in Decimal and Binary
• Number of Microsteps Per Step
can be Changed On-The-Fly
Without Motor Movement Inter-
ruption
• Up to 51,200 Steps/Rev
• Standalone or Buss Modes
• Single 5V Power Supply
• Short Circuit and Over
Temperature Protection Inputs
• Fault Output
• On Full Step Output
• Anti-Resonance
DESCRIPTION
The IM2000 is a high performance
microstepping controller that
incorporates a sine/cosine signal
generator, anti-resonance circuitry,
PWM current control and much
more in one monolithic IC. The
IM2000 combines hardware
intense functions together with
innovative features to provide
designers with a powerful yet
simple solution for their high vol-
ume OEM products.
Never before has any motion
product integrated all the digital
control into one monolithic IC. This
high degree of integration can
significantly reduce design time as
well as driver size.
Beyond the integration of a com-
plete microstepping control system,
the IM2000 has unique features
that give designers unprecedented
control over motor movement.
These features include 14 select-
able resolutions (in both decimal
and binary) that can be changed at
any time without motor movement
interruption. There is no need to
reset the controller. This allows the
user to rapidly move long dis-
tances, yet precisely position the
motor at the end of travel without
the need or expense of a complex
controller.
Another valuable feature is an “On-
Full Step” output which indicates
when the motor is at an electrical
full step. This output can be used to
reduce the overhead needed to
track position when making long
moves.
The development of proprietary
circuits has minimized ripple cur-
rent, while maintaining a 20 KHz
chopping rate. This prevents
additional motor heating that is
common with drivers requiring
higher chopping rates. Now low
inductance stepper motors can be
used to improve high speed perfor-
mance and peak system efficiency.
The IM2000 needs only clock and
direction inputs to control the
motor and will interface directly to
discrete bridges or common mono-
lithic bridge ICs.
Designers can now place drivers
directly on their PC boards with all
the necessary control in either a
68 pin PLCC package, an 80 pin
QFP package, or an ultra small 64
pin QFP package.
Size, price and time-to-market are
three crucial aspects in today’s
competitive markets and the
IM2000 offers the ability to reduce
all three.
IM2000 PIN DESCRIPTION
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IM2000 ABSOLUTE MAXIMUM RATINGS RECOMMENDED OPERATING
CONDITIONS
ELECTRICAL CHARACTERISTICS
VDD = +5.0 ±10% TOPR = 25 °C
DC Electrical Characteristics
AC Electrical Characteristics
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PACKAGING INFORMATION
Dimensions in Inches (mm)
TYPICAL APPLICATION
48V, 3 Amps (RMS)/Phase Microstepping Driver Output Current (AMPS) = .002 x R1 (OHMS)
NOTE: Diodes maybe needed on phase outputs
depending on input voltage and phase currents used.
BLOCK DIAGRAM
INTEGRATED CIRCUITS
