AMT203 Datasheet, PDF (1/8 Pages) CUI INC – 12 BIT ABSOLUTE ENCODER

PART NUMBER: AMT203
date 04/2010
page 1 of 8
DESCRIPTION: 12 BIT ABSOLUTE ENCODER
This encoder is a 12 bit absolute rotational encoder with SPI serial bus for working as a slave to an external
microprocessor. Incremental A,B and Index signals are provided for high speed operation. The Index is one pulse
per 22.5 degree (16 index per turn).
The encoder contains two channels of a capacitive encoder: a Fine channel and a Coarse channel. The Fine channel
has 16 wavelengths of a periodic capacitive pattern, while the Coarse channel has 5 wavelengths. Each channel has
its own ASIC that interpolates to a resolution of 256 increments per wavelength. A microprocessor on the encoder
PCB is combining the two channels for a position reading that is absolute over a full turn with 12 bit resolution.
ELECTRONIC SPECIFICATIONS
parameter
conditions/description
min
power supply
2.7
current consumption
output resolution
incremental output signals
A, B, Z phase
incremental output waveform
square wave
incremental outputs
output voltage - sourcing to +5 V @ -32 mA
3.8
output voltage - sinking to ground @ -32 mA
index output
one index pulse per 1/16 turn
SPI output
natural binary
SPI bus
PIC 16F690 (see datasheet)
SPI resolution
MECHANICAL SPECIFICATIONS
parameter
output range
SPI speed
mounting hole options
conditions/description
min
A) 2 each M1.6 holes on 16 mm (0.63”) bolt circle
B) 2 each #4 holes on 19.05 mm (0.75”) bolt circle
C) 2 each M1.6 or M2 holes on 20 mm (0.787”) bolt
circle
D) 3 each M1.6 or M2 holes on 20.9 mm (0.823”)
bolt circle
E) 3 each M1.6 or M2 holes on 22 mm (0.866”) bolt
circle
F) 4 each M1.6 or M2 holes on 25.4 mm (1”) bolt
circle
G) 2 each #4 holes on 15.75 mm (0.62”) x 20.96
(0.825”) hole layout*
H) 2 each #4 holes on 32.43 mm (1.277”) bolt circle*
I) 2 each #4 holes on 46.03 mm (1.812”) bolt circle*
ENVIRONMENTAL SPECIFICATIONS
parameter
conditions/description
min
operating temperature
-25
storage temperature
-40
humidity
vibration
1.5mm, 3 directions, 2 hours
10
nom
5
8
1024
max
5.5
10
units
V
mA
ppr
V
0.55
V
12
bit
nom
max
360
8000
units
deg
RPM
nom
85
max
85
100
55
units
°C
°C
%RH
Hz
20050 SW 112^th Ave. Tualatin, Oregon 97062 phone [phone] fax [phone] www.cui.com