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ADMC201

FUNCTIONAL BLOCK DIAGRAM

EMBEDDED

CONTROL

SEQUENCER

CLK

REFOUT

RESET

WR

A0–3

RD

CS

IRQ

REFIN

CONVST

U

V

W

AUX

AUX0

AUX1

AUX2

AUX3

PWMSYNC

A

AP

B

BP

C

CP

STOP

INTERNAL

REFERENCE

11-BIT

A/D

CONVERTER

MULTIPLEXER

EXPANSION

BLOCK

12-BIT

PWM TIMER

BLOCK

CONTROL

REGISTERS

VECTOR

TRANSFORMATION

BLOCK

PROG.

DIGITAL

I/O

PORT

PIO 0–5

DATABUS

CONTROL BUS

D0–D11

Motion Coprocessor

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).

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.

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.

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