磁気式　18ビットアブソリュート　ワンチップIC

Page 1:Featuress Integrated Hall sensors for two-track scannings Hall sensors optimized for master tracks iC-MU: pole width 1.28mms iC-MU150: pole width 1.50mms Precise signal conditioning for offset, amplitude, and phases Sine/digital realtime conversion with 12-bit resolution (14-bit filtered)s 2-track nonius absolute value calculation up to 18bitss 16, 32, or 64 pole pairs per measurement distances Enlargement of measurement distance with second iC-MU/iC-MU150s Linear speed to 16m/s, rotational speed to 24000 RPMs Position data output via fast serial interfaces (SPI, SSI, BiSS C)s Incremental encoder quadrature outputs (A, B, Z)s FlexCount®resolution for 1 to 65536CPRs Motor commutation signals for up to 16 pole pairs (U, V, W)s Counter signals and sin/cos signals optionally availables Serial multiturn interface up to 18bitss Position preset functions Device setup via SPI, BiSS C, or I²C from external EEPROMs Operational temperature range of –40°C to 110°Cs Small 16-pin DFN Package of 5mm x 5mm (RoHS compliant)s Magnetic targets available (rotary / linear)DescriptioniC-MU is used for magnetic off-axis position detection with integrated Hallsensors. By scanning two separate channels i.e. the master and nonius trackthe device can provide an absolute position within one mechanical revolution.The internal 12-bit sine/digital converters generate two position words thatsupply high-precision position data within one sine-period. The integratednonius calculation engine calculates the absolute position within one mecha-nical revolution and synchronizes this with the master track position word.Position data can be transmitted serially (SSI, BiSS, SPI), incrementally, oranalog through two ports in various modes of operation. Commutation signals(U, V, W) for brushless DC (BLDC) motors with up to 16 pole pairs are derivedfrom the absolute position and supplied through a 3-pin interface. Besides2-track nonius computation, iC-MU is capable of extending the rotary or linearabsolute position using 3-track nonius computation. A second iC-MU can beconnected to a special daisy chain mode using the multiturn interface.Applicationss Rotative absolute encoders, linear absolute scaless Singleturn and multiturn encoders, motor feedback encoderss BLDC motor commutation, hollow shaft encoders Multi-axis measurement systemsBlock DiagramSER INTERFACE12 BITSYNCHRONIZATIONNONIUS TRACKCONFIGURATIONPGAINTERFACEPORTA PORT BMULTITURNINTERFACE HANDLERRESETCLOCKAMPLITUDE CONTROLBIASREFERENCE128 Byte RAMANA/DIG OUTPUTMASTER TRACK12 BITHALL SENSORSINTERFACE ENCODER PROCESSORSINE/DIGITAL CONVERTERERROR MANAGEMENTI2C EEPROM SCLPB0PB1PB2PB3MTCMTDSDAVNA VNDVPDVPAPA3PA2PA1PA0BB Radial RotaryLinearMagnetic TargetsAxial RotaryMagnetic Off-AxisAbsolute Position EncodersiC-MU, iC-MU150

Page 2:Rotary TargetsAxial 16 32 64MU MU150 MU MU150 MU MU150Largestinner Ø 3mm 5.5mm 15mm 20mm 40mm 51mmSmallestouter Ø 18mm 18mm 30mm 34mm 56mm 64mmRadial 16 32 64MU MU150 MU MU150 MU MU150Largestinner Ø 5mm 7mm 18mm 23mm 40mm 50mmSmallestouter Ø 11.5mm 13.7mm 24.5mm 29mm 50.5mm 59.6mmMagnetic Off-Axis Absolute Position EncodersThis preliminary information is not a guarantee of device characteristics or performance. All rights to technical changes reserved. · Rev. 3.0Am Kuemmerling 18 · D-55294 Bodenheim, Germany · Phone: 49 (6135) 9292-300 · Fax: 49 (6135) 9292-192 · www.ichaus.comTarget DimensionsKey Specifications Pin Configuration DFN16-5x5Pin FunctionsGeneralSupply 4.5V... 5.5V, typ. 53mAMax. Operating Frequency 7kHzMax. Operating Speed linear speed to 16m/s, rotational speedto 24000 RPM @ 16 pole pairs,to 12000 RPM @ 32 pole pairs,to 6000 RPM @ 64 pole pairsMagnetic Field Strength 15 to 100kA/mOperational Temperature –40°C to 110°CNo. Name Function1 SCL EEPROM interface, clock2 SDA EEPROM interface, data3 VPA 4.5V... 5.5V analog supply voltage4 VNA Analog GroundPort B - configurable IO interface5 PB0 Analog sin/cos signalsCommutation signals U, V, WIncremental signals A, B, ZCounter signals up/down, step/dir6 PB17 PB28 PB3Port A - configurable IO interface9 PA3 SPI interface (config. & position)BiSS interface (config.& position)SSI interface (position)Incremental signals A, B, Z10 PA211 PA112 PA013 VND Digital Ground14 VPD 4.5V... 5.5V digital supply voltage15 MTD Multiturn interface, data input16 MTC Multiturn interface, clock outputBP Backside PadMaster TrackiC-MU, iC-MU150Nonius Track123456781615141312111093.6 mmSine-to-Digital ConversionConversion Resolution up to 12bits per signal period(14bits filtered)Conversion Accuracy 2 LSB @ 12bitAnalog Cutoff Frequency 20kHz (–3dB)Position ResolutionNonius of 16/15* 18bits (filtered)**, 5arcsecNonius of 32/31* 19bits (filtered)**, 2.5arcsecNonius of 64/63* 20bits (filtered)**, 1.25arcsec*)No. of signal periods **)18bits max. for A/B outputsOutput PortsCharacteristics CMOS/TTL compatible, ±4mA @ 5VPAx Port Modes SPI, SSI, BiSS C, A/B/ZPBx Port ModesA/B/Z, U/V/W, STEP/DIR, CW/CCW,Sin/Cos 250mVpkIncremental Signals A/B to 5MHz, Z index (adjustable gating)FlexCount® resolution for 1 to 65536CPRCommutation Signals U/V/W for 1 to 16 pole pairs,phase shift 60°or 120°Data InterfacesSPI 4-wire, 10MHz, for position data and config.BiSS C up to 38bits, ERROR, CRC protection, bidirectional, 10MHzSSI up to 38bits, error bits, unidirectional, 4MHzMultiturn up to 18bits SSI, 160kHzLinear TargetsMU MU150Tracks Pole Pairs Absolute Measurement Length2-track Master 16, Nonius 15 40.96mm 48mmMaster 32, Nonius 31 81.92mm 96mmMaster 64, Nonius 63 163.84mm 192mm3-track 256, 255, 240 655.36mm 768mm1024, 1023, 992 2621.44mm 3072mm