IC-MU Datasheet, PDF (1/2 Pages) IC-Haus GmbH – Magnetic off-axis absolute position encoder

iC-MU
Magnetic off-axis
absolute position encoder
iC-MU is an all-in-one, off-axis, magnetic position sensor featur-
ing integrated Hall sensors with automatic signal conditioning
and processing. The nonius scanning of two magnetic tracks (a
master and a nonius track) is evaluated by two real-time-track-
ing sine-to-digital converters. Following power up and nonius
computation, iC-MU provides incremental encoder quadrature
signals with an index of any count up to 65,536 CPR and an
output at an adjustable minimum edge distance. It also gives
the absolute singleturn position with up to 18 bits per revolution
through various serial interfaces (SSI, BiSS, SPI).
Commutation signals for brushless motors with up to 16 pole
pairs are derived from the absolute position and supplied
through a 3-pin interface. The commutation starting angle can
be preset. External counters can be supplied with pulse signals
for cw and ccw or for step and direction.
iC-MU captures full revolutions with its embedded 24-bit period
counter and can thus supplement the position data output for
data lengths of up to 38 bits. Optionally, using the multiturn inter-
face the counter can be loaded following a reset by an exter-
nal 12-bit multiturn sensor, for instance. The data is read and
synchronized with the internal position data, and is cyclically
checked during operation. A preset function permits the adjust-
ment of the absolute position after encoder installation.
Features
• Two-track Hall sensor scanning for 1.28 mm pole width
• Precise signal conditioning for offset, amplitude, and phase
• Synchronous 12-bit sine-to-digital conversion per track
• Nonius computation of absolute position with up to 18 bits
• 16, 32, or 64 pole pairs per measurement distance
• Linear speed to 16 m/s, rotational speed to 24,000 RPM
• Position data output via fast serial interfaces
(SPI, SSI, BiSS C)
• Incremental encoder quadrature outputs (A, B, Z)
• FlexCount® resolution for 1 to 65536 CPR
• Motor commutation signals for up to 16 pole pairs (U, V, W)
• Counter signals and sin/cos signals optionally available
• Serial 12-bit multiturn interface
• Position preset function
• Device setup via SPI or I²C from external EEPROM
• Operational temperature range of –40°C to 95°C
• Small 16-pin DFN Package of 5 mm x 5 mm
• Magnetic targets available
Applications
• Non-contact position measurement
• Linear scales and rotary encoders
• Motion control, motor feedback
PA0
PA1
PA2
PA3
SER INTERFACE
SCL
SDA
I2C EEPROM
INTERFACE
VPA
MASTER TRACK
B
NONIUS TRACK
B
HALL SENSORS
VPD
12 BIT
12 BIT
SINUS/DIGITAL
+ PGA
AMPLITUDE CONTROL
CLOCK
BIAS
REFERENCE
VNA
CONFIGURATION
128 Byte RAM
SYNCHRONISATION
INTERFACE HANDLER
ERROR MANAGEMENT
ENCODER PROCESSOR
VND
PB0
PB1
PB2
ANA/DIG OUTPUT
PB3
iC-MU
MTC
MTD
MULTITURN
Am Kuemmerling 18 • D-55294 Bodenheim, Germany
Tel. [phone] • Fax [phone] • http://www.ichaus.com