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

iC-MU
Magnetic off-axis absolute position encoder
Besides 2-track nonius computation iC-MU is capable of extend-
ing the rotary or linear absolute position using 3-track nonius
computation. A second iC-MU can be connected up and evalu-
ated using the multiturn interface. In doing so, the length of the
absolute position measurement can be extended.
Besides its automatic signal conditioning functions iC-MU fea-
tures manual compensation of the sine/cosine signal offsets and
phase errors for both channels, allowing it to cope with magnet
errors and encoder assembly inaccuracies.
Upon cycling power iC-MU loads its CRC-protected setup
from the external EEPROM connected up to the I²C interface.
Alternatively, using the SPI interface the device can be config-
ured and operated by an external microcontroller.
Pin Functions
No. Name Function
1
SCL
EEPROM I²C Interface, clock line
2
SDA
EEPROM I²C Interface, data line
3
VPA
+4.5 V to +5.5 V Analog Supply Voltage
4
VNA
Analog Ground
5
PB0
Port B, Pin 0:
Digital I/O, analog output configurable
6
PB1
Port B, Pin 1:
Digital I/O, analog output configurable
7
PB2
Port B, Pin 2:
Digital I/O, analog output configurable
8
PB3
Port B, Pin 3:
Digital I/O, analog output configurable
9
PA3
Port A, Pin 3:
Digital I/O, configurable
10
PA2
Port A, Pin 2:
Digital I/O, configurable
11
PA1
Port A, Pin 1:
Digital I/O, configurable
12
PA0
Port A, Pin 0:
Digital I/O, configurable
13
VND
Digital ground
14
VPD
+4.5 V to +5.5 V Digital Supply Voltage
15
MTD Multiturn Interface, data line
16
MTC
Multiturn Interface, clock line
TP
Thermal Pad
Pin Configuration DFN16 5x5 mm²
1
16
2
15
3
14
4
13
5
6
7
M..U.
yyww...
12
11
10
8
9
Key Specifications
General
Supply Voltage
Supply Current
Max. Operating Frequency
Max. Operating Speed
Magnetic Field Strength
ESD Susceptibility
Operational Temperature
Package (RoHS compliant)
+4.5 V to +5.5 V
50 mA max.
6.4 kHz
linear speed to 16 m/s,
rotational speed to 24,000 RPM @ 16
pole pairs, to 12,000 RPM @ 32 pole
pairs, to 6,000 RPM @ 64 pole pairs
15 to 100 kA/m
2 kV (HBM 100 pF, 1.5 kΩ)
-40°C to +95°C
16-pin DFN (5 mm x 5 mm)
Sine-to-Digital Conversion
Conversion Resolution
Conversion Accuracy
Analog Cutoff Frequency
up to 12 bits per signal period
(14 bits filtered)
2 LSB @ 12 bit
20 kHz (-3 dB)
Position Resolution
Nonius of 16/15 *
Nonius of 32/31 *
Nonius of 64/63 *
* No. of signal periods
18 bits (filtered), 5 arcsec / 0.156 µm
19 bits (filtered), 2.5 arcsec / 0.156 µm
20 bits (filtered), 1.25 arcsec / 0.156 µm
(18 bits max. for A/B outputs)
Absolute Linear Measurement Distance
Nonius of 32/31
Nonius of 64/63
Nonius of 1024/1023/992
up to 81.9 mm
(signal phase tolerance +/- 40 µm max.)
up to 163.8 mm
(signal phase tolerance +/- 20 µm max.)
up to 2.62 m (two iC-MU cascaded and
operated at 32/31)
Output Ports
Characteristics
PAx Port Modes
PBx Port Modes
Incremental Signals
Commutation Signals
CMOS/TTL compatible, ±4 mA @ 5 V
SPI, SSI, BiSS C, A/B/Z
A/B/Z, U/V/W, STEP/DIR, CW/CCW,
Sin/Cos 250 mVpk
A/B to 5 MHz, Z index (adjustable gating)
FlexCount® resolution for 1 to 65536 CPR
U/V/W for 1 to 16 pole pairs,
phase shift 60° or 120°
Data Interfaces
SPI
BiSS C
SSI
Multiturn
4-wire, 10 MHz, for position data and config.
up to 38 data bits, error bits, CRC protection,
bidirectional, 10 MHz
up to 38 bits, error bits, unidirectional, 4 MHz
12 bit SSI, 200 kHz
Magnetic Targets (pole wheels)
MU1S 19-16
16/15 pole pairs, OD Ø 19 mm, bore hole 10M6
MU2S 30-32
32/31 pole pairs, OD Ø 30 mm, bore hole 10M6
MU3S 56-64
64/63 pole pairs, OD Ø 56 mm, bore hole 10M6
This preliminary information is not tantamount to a guarantee of device characteristics. All rights to technical changes reserved
Am Kuemmerling 18 • D-55294 Bodenheim, Germany
Tel. [phone] • Fax [phone] • http://www.ichaus.com
Rev. 1.0