iC-TW2
8-BIT SIN/COS INTERPOLATION IC
WITH INTEGRATED EEPROM
Rev D3, Page 1/30
FEATURES
o
Programmable angle resolution from 1 to 256 steps per period
o
Interpolation factors from x0.25 to x64
o
Input frequency to 115 kHz with x64, to 230 kHz with x32, to
460 kHz with x16
o
Latency of less than 1 µs
o
Selectable gain permits single-ended and differential input
signals from 10 mV to 1.5 V peak-peak
o
Index gating input with fine adjustable offset
o
Programmable index pulse output position and width
o
Four incremental output modes: quadrature encoder with
index, up/down clock, increment/direction, 3 phase
commutation
o
Programmable filter and hysteresis
o
Direct sensor connection, minimized count of external
components
o
Non-volatile setup due to internal EEPROM
o
Fully re-programmable via serial 1- and 2-wire interfaces
o
Power-on reset circuit and on-chip oscillator
o
ESD protection and TTL-/CMOS-compatible outputs
APPLICATIONS
o
Interpolation IC for position data
acquisition from analog
sine/cosine sensors
o
Optical linear and rotary
encoders
o
Magneto resistive sensors and
encoders
PACKAGES
QFN24
BLOCK DIAGRAM
VDDA
PINA
+
NRST
VDD
CLKSEL
-
POWER-
ON
RESET
SYSTEM
CLOCK
CLKEXT
-
NINA
+
iC-TW2
B_V
NB_NV
A_U
PINB
+
NA_NU
-
Z_W
-
SIN/D
CONVERSION
NZ_NW
NINB
+
FILTER
SDAT
PINZ
+
HYSTERESIS
-
SIGNAL PROCESSING
ABZ- /
UVW-
GENERATOR
1W-/2W-
INTERFACE
SCLK
-
1W
Zin
NINZ
+
INDEX ENABLE
REGISTERS
INTERNAL EEPROM
BANDGAP
VC
GND
GNDA
Copyright © 2010 iC-Haus
ICHAUS [ IC-HAUS GMBH ]
