iC-LNB
18-BIT OPTO ENCODER
WITH SPI AND SER/PAR INTERFACES
preliminar y
Rev A1, Page 1/35
FEATURES
o
System-on-chip design for excellent reliability
o
Leading/trailing sampling of 10 binary tracks pitched at 400 µm
o
Analog sine/cosine scanning with enlarged photodiodes,
signal conditioning and fast 8-bit vector-tracking interpolation
o
Absolute singleturn resolution of up to 18 bit
o
Unique FlexCount
®
circuit: freely selectable resolution for
absolute and incremental data
o
Incremental quadrature outputs with 1 to 65,536 CPR and
programmable index signal
o
LED illumination control by 50 mA high-side current source
(sin
2
+cos
2
or sum control modes)
o
Alarm indication for configuration or illumination error
o
Permanent RAM monitoring by parity bits
o
3.3 V-compatible SPI and I/O ports for configuration and data
o
Serial data readout in 1 µs cycles at 16 MHz clock frequency
o
Parallel position data output for 16 bit
o
Operation at 4 V to 5.5 V within -40 °C to 110 °C
o
30-pin optoBGA or 38-pin optoQFN package for SMT
o
Illumination: iC-SN85 BLCC SN1C (850 nm encoder LED)
o
Code discs: LNB1S 42-1024 (1024 PPR,
∅
42 mm/18 mm),
LNB4S 26-1024 (1024 PPR,
∅
26.0 mm/9.6 mm)
APPLICATIONS
o
o
o
o
Optical position sensors
Linear scales
Absolute rotary encoders
Programmable incremental
encoders
o
Motor feedback systems
PACKAGES
30-pin optoBGA
7.6 mm x 7.1 mm x 1.6 mm
38-pin optoQFN
7.0 mm x 5.0 mm x 0.9 mm
BLOCK DIAGRAM
+3 V ... 5.5 V
VDD
GND
SCK
MOSI
MISO
CS
VDDA
+4 V ... 5.5 V
C2
C1
iC-LNB
LED Control
sin
2
+cos
2
, sum
SPI
GNDA
LED
ERR
Error
D1
LED
iC-SN85
Calibration
DIR
PSIN
R1
R2
Cosine
NSL
DIN
Sine
P
NSIN
PCOS
NCOS
SER
DOUT
CLK
N
INCA
INCB
INCZ
INC
Interpolation
6/7/8 bit
TPC
TNC
sin
dig
PAR
P0...15
TPS
TNS
GA
GB
XJD
Power-On
POK
Copyright © 2013 iC-Haus
ICHAUS [ IC-HAUS GMBH ]
