modular locking hub design for ease of installation
SPI adjustable settings
’One Touch’ zero position
ELECTRICAL
parameter
power supply
current consumption
quadrature resolution
incremental output signals
incremental output waveform
output current
SPI output
SPI bus
SPI resolution
position accuracy
1. All resolutions stated are before quadrature decoding. (example: 1000 ppr x 4 = 4000 counts)
conditions/description
with unloaded outputs
96, 192, 200, 250, 400, 500, 512, 1024
quadrature A, B signals and index Z
TTL voltage square wave
sink/source
natural binary
PIC 16F690 (see datasheet)
min
4.5
typ
5
8
max
5.5
10
units
V
mA
PPR
2
mA
12
0.2
bit
deg
MECHANICAL
parameter
max. rotational speed
mounting options
A) 2 each M1.6 on 16 mm (0.63”) bolt circle
B) 2 each #4 on 19.05 mm (0.75”) bolt circle
C) 2 each M1.6 or M2 on 20 mm (0.787”) bolt circle
D) 3 each M1.6 or M2 on 20.9 mm (0.823”) bolt
circle with washers in option B holes
E) 3 each M1.6 or M2 on 22 mm (0.866”) bolt circle
F) 4 each M1.6 or M2 on 25.4 mm (1”) bolt circle
conditions/description
min
typ
max
8,000
units
RPM
ENVIRONMENTAL
parameter
operating temperature
humidity
vibration
shock
non-condensing
10 ~ 500 Hz, 5 min sweep, 2 hour each XYZ
3 pulses, 6 ms, 3 each XYZ
conditions/description
min
-40
typ
max
125
85
5
200
units
°C
%
G
G
cui.com
CUI Inc
│
SERIES:
AMT203
│
DESCRIPTION:
MODULAR ENCODER
date
02/12/2013
│
page
2 of 7
PART NUMBER KEY
The AMT203 is designed for 12 bit binary (4,096) operation. For customers who may use the optional quadrature output, one of the resolutions below may be
selected as the default quadrature output.
AMT203XXXX
-
XXXX
-
X
Base Number
Resolution(ppr):
0096
0192
0200
0250
0400
0500
0512
1024
Sleeve Bore Diameter:
2000 = 2 mm
3000 = 3 mm
3175 = 3.175 mm (1/8”)
4000 = 4 mm
4760 = 4.76 mm (3/16”)
5000 = 5 mm
6000 = 6 mm
6350 = 6.35 mm (1/4”)
8000 = 8 mm
Options:
“blank” = standard connector
C = locking connector
D = conformal coating with
standard connector
E = conformal coating with
locking connector
AMT203-V KIT
In order to provide maximum flexibility for our customers, the AMT203 series is provided in kit form standard. This allows the user to implement the encoder
into a range of applications using one sku#, reducing engineering and inventory costs.
SLEEVES
8mm
Blue
1/4 inch
(6.35mm)
Snow
6mm
Red1
5mm
Green1
3/16 inch
(4.76mm)
Yellow1
4mm
Gray60
1/8 inch
(3.175mm)
Purple1
3mm
Orange
2mm
Light Sky Blue
TOOL A
BASE
TOP COVER
TOOL C
SHAFT
ADAPTER
cui.com
CUI Inc
│
SERIES:
AMT203
│
DESCRIPTION:
MODULAR ENCODER
date
02/12/2013
│
page
3 of 7
ENCODER INTERFACE
Standard Connector Option
Locking Connector Option
PINOUT CONNECTOR 1
FUNCTION
#
14
13
12
11
10
9
8
7
6
5
4
3
2
1
SPI
T_Bit
N/A
X
N/A
A
N/A
B
MOSI
5 V+
SCK
GND
MISO
CSB
N/A
B
B
13 11 9
7
5
3
1
13 11 9
7
5
3
1
Mating Connector:
Samtec ISDF-07-D
14 12 10 8
6
4
2
DETAIL B
SCALE 4 : 1
Mating Connector:
Samtec ISDF-07-D-L
14 12 10 8
6
4
2
DETAIL B
SCALE 4 : 1
Encoder Side
1' 0.25"
(304.8)
Demo Board Side
Samtec
ISDF-07-D
(Cable available without Demo Board Connector)
Demo Board Cable
28 AWG
10 conductor
1.27 mm pitch
cui.com
CUI Inc
│
SERIES:
AMT203
│
DESCRIPTION:
MODULAR ENCODER
date
02/12/2013
│
page
4 of 7
MECHANICAL DRAWING
10.34 0.407
R15.49 0.610
15.30 0.602
15.33 0.604
37.39 1.472
28.58 1.125
10.93 0.430
A (3 PLCS)
22.00 0.866
21.45 0.844
R2.10 0.083
19.05 0.750
2.00 0.079
(4 PLCS)
12.60 0.496
2.95 0.116
(2 PLCS)
1.70 0.067
(2 PLCS)
0.55
DETAIL A
SCALE 4 : 1
20.90 0.823
TOLERANCE:
±0.05mm UNLESS OTHERWISE
SPECIFIED
RoHS
25.48 1.003
16.00 0.630
18.60mm
AMT203 ABS WWYY
US Patent No. 6892590
SCALE 5:1
cui.com
5.30mm
R1.20mm
CUI Inc
│
SERIES:
AMT203
│
DESCRIPTION:
MODULAR ENCODER
date
02/12/2013
│
page
5 of 7
APPLICATION NOTES
Encoder operational mode
• Initialization mode: At power up the encoder goes through an initiation and stabilization procedure.
This includes microprocessor stabilization and the program for combining Coarse
and Fine channel of the encoder for getting the absolute start position. This
takes
less than 0.1 seconds.
• Tracking mode: Only the Fine channel is active and the MCU internal position register is updated with
data from Fine:
– MCU 12 bit position register is updated from Fine every 48 μs.
– For accurate position update without above time delay, outputs for incremental A quad B
or Count and Up/Dwn from the Fine channel are provided. These outputs are operational up to
8000 RPM and there is no speed error. There is an acceleration error dependent on an internal
filter constant of about 100 μs.
– When using the incremental output there also is an Index output available, with one index
pulse per turn.
Serial Peripheral Interface Commands
The SPI or Serial Peripheral Interface Bus is a standard interface promoted by Motorola and Microchip among
others. It consists of 4 signals:
MOSI: Master Out Slave In
MISO: Master In Slave Out
SCK: Serial Clock
CSB: Chip Select (active low)
SPI BUS
The SPI bus runs full duplex and transfers multiples of 8 bits in a frame. The SPI type is the most common
(CPOL=0, CPHA=0), also known as Microwire. Data is captured on the rising edge of SCK and the output data
is changed after the falling edge of SCK.
MISO
SCK
LSB
MSB
Terminology
MOSI
MSB
Setup
LSB
MSB = most significant byte
LSB = least significant byte
msb = most significant bit
lsb = least significant bit
CSB
Serial Peripheral Interface Bus (SPI) on AMT203
Figure 7: SPI BUS Timing Diagram
The msb data out on MISO is valid soon after CSB goes low. The MOSI data is valid soon after the falling edge
of SCK. The Encoder drives data out on MISO as long as CSB is low.
Normally, CSB goes low, then after 8 clocks the command is interpreted. CSB high resets the
clock counter, and terminates any command sequence.
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