IC-MG Datasheet, PDF (1/20 Pages) IC-Haus GmbH – 8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER

iC-MG
preliminary
8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
Rev C1, Page 1/20
FEATURES
o Real-time tracking, no-missing-code interpolation to 200 kHz
input frequency (up to x5, to 20 kHz for x50)
o Selectable interpol. factors: x1, x2, x4, x5, x10, x20, x25, x50
o Excellent accuracy (typ. 0.6 LSB) and repeatability
(typ. 0.1 LSB)
o Differential PGA inputs with selectable input resistance for
voltage and current signals
o Adjustable signal conditioning for offset, amplitude, phase
o Unique signal and calibration stabilization feature: supply of
encoder LED or MR bridge via controlled 40 mA current source
o Fail-safe RS422 encoder quadrature outputs with index signal
o Adjustable index position and length (from 1/4 to 1 T)
o Preselectable minimum phase distance supports fail-safe
counting
o Clipping, loss-of-signal and loss-of-tracking indication
o Setup via serial EEPROM interface
o Sub-system power switch offers reverse polarity protection for
the overall system
o Single 5 V supply, operation from -25(40) °C to +100(125) °C
APPLICATIONS
o Optical and magnetic position
sensors
o Rotary encoders
o Linear encoders
PACKAGES
TSSOP20
BLOCK DIAGRAM
PCOS
+
-
-
NCOS
+
COSINE INPUT / CH.2
PSIN
+
-
iC-MG
COS
SIN
PHASE
CORRECTION
COUNTER
TAN
NSIN
-
+
SINE INPUT / CH1
PZERO
+
-
Sin/D CONVERSION
SIGNAL LEVEL CONTROLLER
-
NZERO
+
ZERO INPUT / CH0
Z_In
INDEX ENABLE
SIGNAL MONITOR
VDDS GNDS
REVERSE
POLARITY
PROTECTION
VDD
GND
B
NB
A
NA
Z
RS422 LINE
DRIVER
NZ
SDA
E2PROM
INTERFACE
SCL
PWR
NERR
Copyright © 2008 iC-Haus
http://www.ichaus.com