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iC-TW29
26-BIT ENCODER PROCESSOR
WITH INTERPOLATION AND BiSS INTERFACE
Rev C1, Page 1/28
FEATURES
•
Any output resolution with any input resolution
•
Independently-programmed ABZ, UVW, and BiSS resolutions
•
Absolute data interface for external revolution counters
•
BiSS C-Mode interface (Encoder Profiles 3, 3S, and 4)
•
26-bit singleturn position and 32-bit revolution count via SPI
•
Four capture registers for coded reference marks and
touch-probe applications
•
Eccentricity compensation
•
Input frequency up to 700 kHz
•
AB output frequency of up to 12.5 MHz
•
Differential RS422 line driver outputs for ABZ or UVW
•
Simultaneous single-ended outputs for ABZ, UVW, BiSS
•
Automatic compensation of amplitude, offset, and phase errors
•
Digital filtering for ultra-low output jitter
•
Encoder Link interface for in-field re-configuration
•
Internal EEPROM and oscillator
•
LED intensity control by PWM output
•
Low latency (2.4
µ
s or 5.0
µ
s)
•
Pin-compatible with iC-TW28
APPLICATIONS
•
Rotary and linear incremental or
absolute encoders
•
Magnetic or optical sin/cos
sensor interface
•
Brushless motor commutation
(2...64 poles)
•
Imbedded motion control
PACKAGES
32-pin QFN
5 mm x 5 mm x 0.9 mm
RoHS compliant
BLOCK DIAGRAM
Interpolated Angle (IA)
SPI
Interface
xSS
SCK
SO
SI
Interpolator
ZERO
Channel
SIN+
SIN–
COS+
COS–
ZERO+
ZERO–
26-Bit
Gearbox
Includes
Filter,
Hysteresis,
and
Eccentricity
Correction
Zero Gating Window (ZW)
ABZ with
Output Freq.
Limiter
Normalized Angle (NR)
Revolution Count (RC)
UVW
BiSS Slave
with Encoder
Profile and
EDS
UVW Scan
Absolute Data
Interface
(ADI)
Revolution Count (RC),
Cycle Count (CC), and Sync Bits
I/O
Multiplexer
A+
A–
B+
B–
Z+
Z–
Auto Calibration,
Auto Adaption,
LED Control, Startup,
ID, EEPROM
xCALIB
xIRQ
LED
Position
Capture
BiSS Control Data
Encoder Link
Monitors:
Status/Fault, Temp.,
Sin/Cos Amplitude,
Excessive Error,
Excessive Adaption
GPIO
IA
CC
RC
AVDD
AVSS
DVDD
DVSS
IOVDD
IOVSS
iC-TW29
Copyright
©
2019, 2020 iC-Haus