IC-TW4 Datasheet, PDF (1/14 Pages) IC-Haus GmbH – PROGRAMMABLE INTERPOLATOR WITH AUTOMATIC OFFSET CORRECTION

iC-TW4 PROGRAMMABLE INTERPOLATOR
WITH AUTOMATIC OFFSET CORRECTION
Rev D1, Page 1/14
FEATURES
o Realtime interpolation with selectable factors of
x2, x4, x5, x8, x10, x16, x20, x25, x32, x50, x64
o Differential signal and index gating inputs
o Input voltage range of 10 mVpp diff. to 1.5 Vpp diff.
o Maximum input frequency of 300 kHz (to x8),
150 kHz (x10 to x16), 75 kHz (x20 and up)
o Selectable hysteresis of 2.8 ° to 15.6 °
o Averaging filter over 16 samples
o Latency less than 1 µs
o Differential encoder quadrature outputs
o Electronic index signal generation
o Startup behaviour: ABZ state defined by absolute sensor
position within a period
o Automatic offset correction for sensor and interpolator circuit
o Static pin programming with four external resistors
o Low power consumption from single-ended 3.3 V to 5 V supply
o Extended temperature range of -40 to +125 °C
APPLICATIONS
o Optical and magnetic position
sensors
o Rotary encoders
o Linear encoders
o Space constraint embedded
solutions
PACKAGES
QFN24
BLOCK DIAGRAM
PINA
+
NINA
-
COSINE INPUT / A
PINB
+
NINB
-
SINE INPUT / B
PINZ
NINZ
ZERO INPUT
VDD
iC-TW4
SIN/D
CONVERSION
AUTOMATIC
OFFSET
COMPENSATION
16 x FILTER
HYSTERESIS
SIGNAL PROCESSING
ABZ-
GENERATOR
GND ^{2 PIN-SETUP}
B
NB
A
NA
Z
NZ
CFG1
CFG2
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http://www.ichaus.com