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ADMC200 bảng dữ liệu(PDF) 1 Page - Analog Devices

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ADMC200 bảng dữ liệu(HTML) 1 Page - Analog Devices

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ADMC200
FUNCTIONAL BLOCK DIAGRAM
RESET
WR
A0–3
RD
CS
IRQ
CLK
REFOUT
REFIN
CONVST
U
V
W
AUX
PWMSYNC
A
AP
B
BP
C
CP
STOP
EMBEDDED
CONTROL
SEQUENCER
INTERNAL
REFERENCE
11-BIT
A/D
CONVERTER
12-BIT
PWM TIMER
BLOCK
CONTROL
REGISTERS
VECTOR
TRANSFORMATION
BLOCK
DATABUS
CONTROL BUS
D0 – D11
Motion Coprocessor
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.
FEATURES
Analog Input Block
11-Bit Resolution Analog-to-Digital (A/D) Converter
4 Single-Ended Simultaneously Sampled Analog 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
DSP & Microcontroller Interface
12-Bit Memory Mapped Registers
Twos Complement Data Format
6.25 MHz to 25 MHz Operating Clock Range
68-Lead PLCC Package
Single 5 V DC Power Supply
Industrial Temperature Range
GENERAL DESCRIPTION
The ADMC200 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 ADMC200 provides the neces-
sary motor control functions: analog current data acquisition,
vector transformation, 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).
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
Flexible Analog Channel Sequencing
The ADMC200 support 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 in-
put 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
ADMC200 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 ADMC200 integrates a four channel simultaneous sam-
pling analog-to-digital converter, analog reference, vector trans-
formation, and three-phase PWM timers into a 68-lead PLCC.
Integration reduces cost, board space, power consumption, and
design and test time.
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