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Analog Devices - Motion Coprocessor

Numéro de référence ADMC201
Description Motion Coprocessor
Fabricant Analog Devices 
Logo Analog Devices 





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ADMC201 fiche technique
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Motion Coprocessor
ADMC201
FEATURES
Analog Input Block
11-Bit Resolution Analog-to-Digital (A/D) Converter
7 Single-Ended (SE) Analog Inputs
4 Simultaneously Sampled Analog Inputs
Expansion with 4 Multiplexed Inputs
3.2 s Conversion Time/Channel
0 V–5 V Analog Input Range
Internal 2.5 V Reference
PWM Synchronized Sampling Capability
12-Bit PWM Timer Block
Three-Phase Center-Based PWM
1.5 kHz–25 kHz PWM Switching Frequency Range
Programmable Deadtime
Programmable Pulse Deletion
PWM Synchronized Output
External PWM Shutdown
Vector Transformation Block
12-Bit Vector Transformations
Forward and Reverse Clarke Transformations
Forward and Reverse Park Rotations
2.9 s Transformation Time
Programmable Digital I/O Port
6-Bit Configurable Digital I/O
Change of State Interrupt Support
DSP & Microcontroller Interface
12 Bit Memory Mapped Registers
Twos Complement Data Format
6.25 MHz to 25 MHz Operating Clock Range
68-Pin PLCC Package
Single 5 V DC Power Supply
Industrial Temperature Range
GENERAL DESCRIPTION
The ADMC201 is a motion coprocessor that can be used with
either microcontrollers or digital signal processors (DSP). It
provides the functionality that is required to implement a digital
control system. In a typical application, the DSP or micro-
controller performs the control algorithms (position, speed,
torque and flux loops) and the ADMC201 provides the neces-
sary motor control functions: analog current data acquisition,
vector transformation, digital inputs/outputs, and PWM drive
signals.
PRODUCT HIGHLIGHTS
Simultaneous Sampling of Four Inputs
A four channel sample and hold amplifier allows three-phase
motor currents to be sampled simultaneously, reducing errors
from phase coherency. Sample and hold acquisition time is
1.6 µs and conversion time per channel is 3.2 µs (using a 12.5 MHz
system clock).
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
RESET
WR
A0–3
RD
CS
IRQ
CLK
REFOUT
REFIN
CONVST
U
V
W
AUX
AUX0
AUX1
AUX2
AUX3
PWMSYNC
A
AP
B
BP
C
CP
STOP
FUNCTIONAL BLOCK DIAGRAM
D0–D11
DATABUS
EMBEDDED
CONTROL
SEQUENCER
CONTROL BUS
INTERNAL
REFERENCE
CONTROL
REGISTERS
11-BIT
A/D
CONVERTER
MULTIPLEXER
EXPANSION
BLOCK
12-BIT
PWM TIMER
BLOCK
VECTOR
TRANSFORMATION
BLOCK
PROG.
DIGITAL
I/O
PORT
PIO 0–5
Flexible Analog Channel Sequencing
The ADMC201 supports acquisition of 2, 3, or 4 channels per
group. Converted channel results are stored in registers and
the data can be read in any order. The sampling and conversion
time for two channels is 8 µs, three channels is 11.2 µs, and four
channels is 14.4 µs (using a 12.5 MHz system clock).
Embedded Control Sequencer
The embedded control sequencer off-loads the DSP or micro-
processor, reducing the instructions required to read analog
input channels, control PWM timers and perform vector trans-
formations. This frees the host processor for performing control
algorithms.
Fast DSP/Microprocessor Interface
The high speed digital interface allows direct connection to 16-bit
digital signal processors and microprocessors. The ADMC201
has 12 bit memory mapped registers with twos complement
data format and can be mapped directly into the data memory
map of a DSP. This allows for a single instruction read and write
interface.
Integration
The ADMC201 integrates a four channel simultaneous sampling
analog-to-digital converter, four channel analog multiplexer,
analog reference, vector transformation, six digital inputs/outputs,
and three-phase PWM timers into a 68-pin PLCC. Integration
reduces cost, board space, power consumption, and design and
test time.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2000

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