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REV101805
DESCRIPTION
The IM2000S is a high per for -
mance microstepping controller
that in cor po rates a sine/cosine
sig nal gen er a tor, anti-res o nance
cir cuit ry, PWM cur rent control
and much more in one mono lith ic
IC. The IM2000S com bines hard-
ware in tense func tions to geth er
with in no va tive fea tures to provide
de sign ers with a powerful yet sim ple
solution for their high vol ume OEM
prod ucts.
Never before has any motion prod-
uct integrated all the digital control
into one mono lith ic IC. This high
de gree of in te gra tion can signi -
cantly reduce design time as well
as driv er size.
Beyond the integration of a com-
plete microstepping control sys tem,
the IM2000S has unique features
that give designers un prec e dent ed
con trol over motor move ment.
These fea tures in clude 14 se lect -
able res o lu tions (in both decimal
and binary) that can be changed at
any time with out motor move ment
in ter rup tion. There is no need to
reset the con trol ler. This al lows the
user to rapidly move long dis tanc es,
yet pre cise ly position the mo tor at
the end of trav el without the need or
expense of a com plex controller.
Another valuable feature is an “On
Full Step” output which in di cates
when the mo tor is at an electrical
full step. This output can be used
to reduce the over head needed to
track position when making long
moves.
The development of pro pri etary cir-
cuits has minimized ripple cur rent,
while main tain ing a 20 KHz chop-
ping rate. This prevents additional
motor heat ing that is common with
drivers re quir ing high er chop ping
rates. Now low inductance step per
motors can be used to im prove
high speed per for mance and peak
sys tem ef cien cy.
The IM2000S needs only clock
and di rec tion inputs to control the
PACKAGING INFORMATION
Dimensions in Inches (mm)
mo tor and will in ter face directly to
dis crete bridg es or com mon mono-
lith ic bridge ICs.
Designers can now place drivers
di rect ly on their PC boards with all
the nec es sary con trol in an ultra
small 64 pin QFP package.
Size, price and time-to-market are
three crucial aspects in today’s
com pet i tive mar kets and the
IM2000S of fers the ability to re-
duce all three.
Enlarged View Above
Actual Size
FEATURES
•
IM2000S Offers a Com plete
Microstepping Control Sys tem
in a 64 Pin QFP Pack age
•
Up to 10MHz Step Clock Rate
•
Internal Sine/Cosine Generator
•
PWM Phase Current Control
•
Minimal External Components
•
Automatic Current Reduction
•
14 Selectable Resolutions, in
Both Dec i mal and Binary
•
Number of Microsteps
Per Step can be Changed
On-The-Fly With out Motor
Move ment Interruption
•
Up to 51,200 Steps/Rev
•
Standalone or Buss Modes
•
Single +5 VDC Power Supply
•
Short Circuit and Over
Temperature Protection Inputs
•
Fault Output
•
On Full Step Output
•
Anti-Resonance Circuitry