Analog Devices AD2S100AP Datasheet

a

AC Vector Processor

AD2S100

FEATURES
Complete Vector Coordinate Transformation on Silicon
Mixed Signal Data Acquisition
Three-Phase 1208 and Orthogonal 908 Signal

Transformation

Three-Phase Balance Diagnostic–Homopolar Output
APPLICATIONS

AC Induction and DC Permanent

Magnet Motor Control

HVAC, Pump, Fan Control
Material Handling
Robotics
Spindle Drives
Gyroscopes
Dryers
Washing Machines
Electric Cars
Actuator
Three-Phase Power Measurement

Digital-to-Resolver & Synchro Conversion

GENERAL DESCRIPTION

The AD2S100 performs the vector rotation of three-phase 120
degree or two-phase 90 degree sine and cosine signals by trans­ferring these inputs into a new reference frame which is controlled
by the digital input angle φ. Two transforms are included in the
AD2S100. The first is the Clarke transform which computes
the sine and cosine orthogonal components of a three-phase
input. These signals represent real and imaginary components
which then form the input to the Park transform. The Park
transform relates the angle of the input signals to a reference
frame controlled by the digital input port. The digital input
port is a 12-bit parallel binary representation.

If the input signals are represented by Vds and Vqs, respectively,
where Vds and Vqs are the real and imaginary components, then
the transformation can be described as follows:

Vds' = Vds Cosφ – Vqs Sinφ
Vqs' = Vds Sinφ + Vqs Cosφ

Where Vds' and Vqs' are the output of the Park transform
and Sinφ, and Cosφ are the values internally derived by the
AD2S100 from the binary digital data.

The input section of the device can be configured to accept
either three-phase inputs, two-phase inputs of a three-phase
system, or two 90 degree input signals. The homopolar output
detects the imbalance of a three-phase input only. Under nor­mal conditions, this output will be zero.

FUNCTIONAL BLOCK DIAGRAM

φ

PARALLEL

12 BITS

SINE AND

COSINE

MULTIPLIER

SINE AND

COSINE

MULTIPLIER

HOMOPOLAR

REFERENCE

POSITION

DATA

Vds'

Vqs'

+5V GND –5V

2φ-3φ

BUSY

Va

Vb
Vc

Sin

Cos θ + φ

Cos (

Cos (

θ + φ

θ + 120° + φ)

θ + 240° + φ)

Cosθ

Cos (θ + 120°)

Cos (θ + 240°)

Sinθ

CONV1
CONV2

INPUT
DATA

STROBE

SinθCosθ

Ia

Ib

30-20

Ic

DECODE

SECTOR

MULTIPLIER

Vds

SECTOR

Vqs

MULTIPLIER

HOMOPOLAR

OUTPUT

Ia + Ib + Ic

3

The digital input section will accept a resolution of up to 12 bits
(AD2S100). An input data strobe signal is required to synchro­nize the position data and load this information into the device
counters. A busy output is provided to identify the conversion
status of the AD2S100. The busy period represents the conver­sion time of the vector rotation.

Two analog output formats are available. A two-phase rotated
output facilitates multiple rotation blocks. Three phase format
signals are available for use with a PWM inverter.

PRODUCT HIGHLIGHTS
Hardware Peripheral for Standard Microcontrollers and
DSP Systems

The AD2S100 removes the time consuming cartesian transfor­mations from digital processors and benchmarks a speed im­provement of 30:1 on standard 20 MHz processors. AD2S100
transformation time = 2 µs (typ).

Field Oriented Control of AC and DC Brushless Motors

The AD2S100 accommodates all the necessary functions to
provide a hardware solution for ac vector control of induction
motors and dc brushless motors.

Three-Phase Imbalance Detection

The AD2S100 can be used to sense overcurrent situations or
imbalances in a three-phase system via the homopolar output.

Resolver-to-Digital Converter Interface

The AD2S100 provides general purpose interface for position
sensors used in the application of dc brushless and ac induction
motor control.

REV. A

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: [phone] Fax: [phone]

(VDD = +5 V 6 5%; VSS = –5 V 6 5% AGND = DGND = O V; TA = –408C to

AD2S100–SPECIFICATIONS

+85°C, unless otherwise noted)

Parameter Min Typ Max Units Conditions

SIGNAL INPUTS

PH/IP1, 2, 3, 4 Voltage Level ±2.8 63.3 V p-p DC to 50 kHz
PH/IPH1, 2, 3 Voltage Level ±4.25 V p-p DC to 50 kHz
Input Impedance

PH/IP1, 2, 3 7.5 10 kΩ
PH/IPH1, 2, 3 13.5 18 kΩ
PH/IP1, 4 1 MΩ Mode 1 Only (2 Phase) Sin & Cos

Gain

PH/IP1, 2, 3, 4 0.98 1 1.02
PH/IPH1, 2, 3 0.56

VECTOR PERFORMANCE

3θ Input-Output

Radius Error (Any Phase) 0.35 0.7 % DC to 600 Hz
Angular Error

1, 2

(PH/IP) 9 18 arc min DC to 600 Hz

(PH/IPH) 24 arc min DC to 600 Hz

Monotonicity Guaranteed Monotonic
Full Power Bandwidth 50 kHz
Small Signal Bandwidth 200 kHz

ANALOG SIGNAL OUTPUTS

PH/OP1, 2, 3, 4 PH/IP, PH/IPH INPUTS

Output Voltage

3

±2.8 ±3.3 V p-p DC to 50 kHz

Offset Voltage 2 5 mV Inputs = 0 V
Slew Rate 2 V/µs
Small Signal Step Response 1 µs1° Input to Settle to ±1 LSB

(Input to Output)

Output Resistance 15 Ω
Output Drive Current 3.0 4.0 mA Outputs to AGND
Resistive Load 2 kΩ
Capacitive Load 50 pF

STROBE

Write 100 ns Positive Pulse
Max Update Rate 366 kHz

BUSY

Pulse Width 1.7 2.5 µs Conversion in Process
V

OH

V

OL

4V dcI

1V dcI

= 0.5 mA

OH

= 0.5 mA

OL

DIGITAL INPUTS

DB1–DB12

V

IH

V

IL

Input Current, I

IN

Input Capacitance, C

IN

3.5 V dc

1.5 V dc

610 µA

10 pF

CONVERT MODE

(CONV1, CONV2)

V

IH

V

IL

3.5 V dc Internal 50 kΩ Pull-Up Resistor

1.5 V dc

Input Current 100 µA
Input Capacitance 10 pF

CONVERT LOGIC

CONV1 CONV2
NO CONNECT DGND 2-Phase Orthogonal with 2 Inputs

Nominal Input Level

DGND V

DD

3-Phase (0°, 120°, 240°) with 3 Inputs
Nominal Input Level

V

DD

V

DD

3-Phase (0°, 120°, 240°) with 2 Inputs
Nominal Input Level

–2–

REV. A

AD2S100

WARNING!

ESD SENSITIVE DEVICE

Parameter Min Typ Max Units Conditions

HOMOPOLAR OUTPUT

HPOP–Output

V

OH

V

OL

HPREF–REFERENCE 0.5 V dc Homopolar Output-Internal

HPFILT-FILTER 100 kΩ Internal Resistor with External

POWER SUPPLY

V

DD

V

SS

I

DD

I

SS

NOTES

1

Angular accuracy includes offset and gain errors. Stationary digital input and maximum analog frequency inputs.

2

Included in the angular error is an allowance for the additional error caused by the phase delay as a function of input frequency. For example, if
f

= 600 Hz, the contribution to the error due to phase delay is: 650 ns × f

INPUT

3

Output subject to input voltage and gain.

Specifications in boldface are production tested.
Specifications subject to change without notice.

4 V dc IOH = 0.5 mA

1 V dc IOL = 0.5 mA

I

= 25 µA and 20 kΩ

SOURCE

to AGND

Capacitor = 220 nF

4.75 5 5.25 V dc
–5.25 –5 –4.75 V dc

4 10 mA Quiescent Current
4 10 mA Quiescent Current

× 60 × 360 = 8.4 arc minutes.

INPUT

RECOMMENDED OPERATING CONDITIONS

Power Supply Voltage (+VDD, –V

) . . . . . . . . . ±5 V dc ± 5%

SS

Analog Input Voltage (PH/IP1, 2, 3, 4) . . . . . . 2 V rms ± 10%

Analog Input Voltage (PH/IPH1, 2, 3) . . . . . . 3 V rms ± 10%

Ambient Operating Temperature Range

Industrial (AP) . . . . . . . . . . . . . . . . . . . . . . .–40°C to +85°C

ORDERING GUIDE

Model Temperature Range Accuracy Option*

AD2S100AP –40°C to +85°C 18 arc min P-44A

*P = Plastic Leaded Chip Carrier.

ABSOLUTE MAXIMUM RATINGS

VDD to AGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V dc

V

to AGND . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –7 V dc

SS

AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.3 V dc

Analog Input Voltage to AGND . . . . . . . . . . . . . . . V

Digital Input Voltage to DGND . . . . –0.3 V to V

Digital Output Voltage to DGND . . . –0.3 V to V
Analog Output Voltage to AGND

. . . . . . . . . . . . . . . . . . . . . . V

Analog Output Load Condition (PH/OP1, 2, 3, 4

Sinθ, Cosθ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 kΩ

Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 mW

Operating Temperature

Industrial (AP) . . . . . . . . . . . . . . . . . . . . . . . –40°C to +85°C

Storage Temperature . . . . . . . . . . . . . . . . . –65°C to +150°C

Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . +300°C

CAUTION

1. Absolute Maximum Ratings are those values beyond which
damage to the device may occur.

2. Correct polarity voltages must be maintained on the +V
and –VSS pins.

CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD2S100 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.

(TA = +25°C)

to V

SS

+ 0.3 V dc

DD

+ 0.3 V dc

DD

– 0.3 V to VDD + 0.3 V dc

SS

DD

DD

REV. A

–3–

AD2S100

6 5 4 3 2 1 44 43 42 41 40

18 19 20 21 22 23 24 25 26 27 28

29

30

31

32

33

34

35

36

37

38

39

V

SS

V

DD

STROBE

NC

NC

BUSY

DGND

V

DD

NC

NC

V

SS

HPREF

HPOP

CONV1

CONV2

COS

DB12

HPFILT

DB11

NC = NO CONNECT

TOP VIEW

(NOT TO SCALE)

AD2S100

PH/OP4

NC

SIN

7

8

11

12

13
14

15

16

17

9

10

NC

DB1

DB2

DB3

DB4

DB5

DB6
DB7

DB8

DB9

DB10

PH/OP1

PH/OP3

PH/OP2

AGND

PH/IP4

PH/IPH3

PH/IP3

PH/IPH2

PH/IP2

PH/IPH1

PH/IP1

PIN DESIGNATIONS

1, 2, 3

Pin Mnemonic Description

3 STROBE Begin Conversion
4V
5V

DD
SS

Positive Power Supply
Negative Power Supply

6 PH/OP4 Sin (θ + φ)
7 PH/OP1 Cos (θ + φ)
8 PH/OP3 Cos (θ + 240° + φ)
9 PH/OP2 Cos (θ + 120° + φ)
10 AGND Analog Ground
11 PH/IP4 Sin θ Input
12 PH/IPH3 High Level Cos (θ + 240°) Input
13 PH/IP3 Cos (θ + 240°) Input
14 PH/IPH2 High Level Cos (θ + 120°) Input
15 PH/IP2 Cos (θ + 120°) Input
16 PH/IPH1 High Level Cos θ Input
17 PH/IP1 Cos (θ) Input
19 V

SS

Negative Power Supply
20 HPREF Homopolar Reference
21 HPOP Homopolar Output
22 HPFILT Homopolar Filter
23 CONV1 Select Input Format (3 Phase/3 Wire, Sin θ
24 CONV2 Cos θ/Input, 3 Phase/2 Wire)
25 COS Cos Output
26 SIN Sin Output
27 DB12 (DB1 = MSB, DB12 = LSB
38 DB1 Parallel Input Data)
41 V

DD

Positive Power Supply
42 DGND Digital Ground
44 BUSY Conversion in Progress

NOTES
Signal Inputs Ph/IP and PH/IPH on Pin Nos 11 through 17.

1

90° orthogonal signals = Sin θ, Cos θ (Resolver) = PH/IP4 and PH/IP1.

2

Three phase, 120°, three-wire signals
= Cos θ, Cos (θ + 120°), Cos (θ + 240°).
= PH/IP1, PH/IP2, PH/IP3
High Level = PH/IPH1, PH/IPH2, PH/IPH3.

3

Three Phase, 120°, two-wire signals = Cos (θ + 120°), Cos (θ + 240°)

= PH/IP2, PH/IP3.
In all cases where any of the input Pins 11 through 17 are not used, they must
be left unconnected.

PIN CONFIGURATION

–4–

REV. A