• configuration and firmware updates via AMT Viewpoint™ software
• digitally settable zero position
• compact modular package with locking hub for ease of installation
• radial and axial cable connections
• -40 ~ 105°C operating temperature
ELECTRICAL
parameter
power supply
start-up time
current consumption
input low level
input high level
output low level
output high level
3.3
2.0
with unloaded output
conditions/description
VDD
min
3.8
typ
5
200
16
0.8
5.5
0.8
max
5.5
units
V
ms
mA
V
V
V
V
ABSOLUTE POSITION CHARACTERISTICS
parameter
resolution
accuracy
absolute zero position
absolute position update rate
settable via AMT Viewpoint™ GUI or SPI command
12-bit
14-bit
25
100
µs
µs
conditions/description
12 or 14-bit
0.2
degrees
min
typ
max
units
MECHANICAL
parameter
motor shaft length
weight
axial play
rotational speed (at each
resolution)
12-bit position resolution
14-bit position resolution
conditions/description
min
9
15.7
±0.3
8,000
4,000
typ
max
units
mm
g
mm
RPM
RPM
ENVIRONMENTAL
parameter
operating temperature
humidity
vibration
shock
RoHS
non-condensing
10~500 Hz, 5 minute sweep, 2 hours on each XYZ
3 pulses, 6 ms, 3 on each XYZ
yes
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conditions/description
min
-40
typ
max
105
85
5
200
units
°C
%
G
G
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2 of 9
SERIAL INTERFACE
parameter
protocol
frame size
data rate
transceiver
T
CLK
T
B
T
CS
T
R
Notes:
conditions/description
Serial Peripheral Interface Mode 0
min
typ
8
max
units
bit
2
SPI driven by PIC18F14K22
1
data shifted to output buffer
2
time between bytes
time between reads
time before CS can be released
2.5
2.5
40
3
MHz
µs
µs
µs
µs
1. See Microchip documentation for more details.
2. This is the time it takes to load the most current position into the SPI buffer which prevents multiple read/response commands from being required.
Figure 1
Timing Waveform
CHIP SELECT
T
CLK
T
B
T
R
T
CS
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
SCLK
MISO
K1
K0
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
C7
C6
C5
C4
C3
C2
C1
C0
C7
C6
C5
C4
C3
C2
C1
C1
MOSI
First Command Char
Second Command Char
Lorem ipsum
Values K1 and K0 in the response are checkbits. The checkbits are odd parity over the odd and even bits in the position
response shown in the equation below. The checkbits are not part of the position, but are used to verify its validity. The
lower 14 bits are the encoder position.
Example:
Full response: 0x61AB
14-bit position: 0x21AB (8619 decimal)
Checkbit Formula
Odd: K1 = !(H5^H3^H1^L7^L5^L3^L1)
Even: K0 = !(H4^H2^H0^L6^L4^L2^L0)
From the above response 0x61AB:
Odd: 0 = !(1^0^0^1^1^1^1) = correct
Even: 1 = !(0^0^1^0^0^0^1) = correct
For 12-bit applications L0 and L1 are always 0. Because the low two bits are 0, 12-bit data will need right-shifted two bits.
The checkbit calculation remains the same and unaffected.
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SERIAL INTERFACE (CONTINUED)
Commands:
Read Position
Hex command sequence: 0x00 0x00
The command to read position is 0x00, 0x00 because the encoder will always respond with the current position when SPI is
accessed. The encoder observes the second byte for extended commands.
Extended Commands:
Reset Encoder
Hex command sequence: 0x00 0x60
The encoder responds with the current position over the transmission then immediately resets. Observe the power on time
when using this command. Encoder must be stationary to power back on.
Set Zero Point
Hex command sequence: 0x00 0x70
The encoder responds with the current position over this transmission then saves the current position into memory and
performs a reset. Encoder must be stationary for this command. Observe the power on time when using this command.
AMT VIEWPOINT™ OPERATION
The AMT22 encoder operates in two modes: programming, and SPI mode. To enter programming mode for use with
AMT Viewpoint™ the slide on the bottom of the encoder must be moved to the programming position. Slide the switch
to the left position before connecting encoder to AMT Viewpoint™. Once configuration in AMT Viewpoint™ is completed,
disconnect encoder and return switch to the standard run mode position before connecting encoder to system. Switch must
be in proper mode for programming or SPI before power is connected to device.
A
Run Mode
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Program Mode
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PART NUMBER KEY
For customers that prefer a specific AMT22 configuration, please reference the custom configuration key below.
AMT22
X X
-
XXXX
-
X
Base Number
Mounting Base:
S = Standard
W= Wide
Absolute Resolution:
A = 12-bit
B = 14-bit
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
Orientation:
2 = Radial
3 = Axial
AMT22-V KITS
In order to provide maximum flexibility for our customers, the AMT22 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
ORDERING GUIDE
AMT22XX-V
Orientation:
2 = Radial
3 = Axial
Absolute Resolution:
A = 12-bit
B = 14-bit
2mm
Light Sky
Blue
3mm
Orange
1/8 inch
(3.175mm)
Purple
4mm
Gray
3/16 inch
(4.76mm)
Yellow
5mm
Green
6mm
Red
1/4 inch
(6.35mm)
Snow
8mm
Blue
BASE
WIDE
BASE
TOP
COVER
SHAFT
ADAPTER
TOOL A
TOOL C
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ENCODER INTERFACE
PINOUT CONNECTOR
#
1
2
3
4
5
6
Function
+5 V
SCLK
MOSI
GND
MISO
CHIP SELECT
AMT222
AMT223
Mating Connector
1
:
Molex 502578-0600
Notes:
1. Compatible with prototype cable AMT-06C-1-036 and programming cable AMT-06C-1-036-USB.
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