iC-MG
preliminar y
Rev C1, Page 1/20
8-Bit Sin/Cos INTERPOLATION IC WITH RS422 DRIVER
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
VDDS
PCOS
+
GNDS
VDD
-
iC-MG
COS
COUNTER
REVERSE
POLARITY
PROTECTION
GND
-
B
NCOS
+
NB
COSINE INPUT / CH.2
SIN
PSIN
A
+
PHASE
CORRECTION
TAN
-
NA
Z
-
NSIN
+
NZ
Sin/D CONVERSION
RS422 LINE
DRIVER
SINE INPUT / CH1
PZERO
+
SDA
SIGNAL LEVEL CONTROLLER
E2PROM
INTERFACE
Z
In
PWR
NERR
INDEX ENABLE
SIGNAL MONITOR
-
SCL
-
NZERO
+
ZERO INPUT / CH0
Copyright © 2008 iC-Haus
ICHAUS [ IC-HAUS GMBH ]
