IC-LGC Datasheet, PDF (2/2 Pages) IC-Haus GmbH – 21-BIT OPTICAL POSITION ENCODER WITH SERIAL/PARALLEL AND SIN/COS OUTPUT

iC-LGC 21-BIT OPTICAL POSITION ENCODER
The scanning unit uses pre-positioned and post-positioned
photosensors for each track to ease encoder assembly by mod-
erating tolerances. Differential evaluation of all sensors enables
operation at high ambient temperatures. An integrated LED
power control with a highside driver guarantees illumination
regardless of temperature or ageing effects.
The chip features offset and amplitude calibration for the analog
output signals also fed to the integrated 3-bit flash and the 8-bit
SAR interpolators.
External multiturn sensors can be operated via an SSI or A/B
counter interface; the count is maintained when a backup bat-
tery is connected. iC-LGC synchronizes and combines all data
to generate a single-step-proof position data word. The chip's
operation is monitored with configurable alarms; CRC verifica-
tion of configuration data is also available.
The serial I/O interface in BiSS C protocol (SSI is optional) has
permanent bidirectional register communication. The user can
access released data areas (e.g. OEM data in the EEPROM)
without interfering with control cycles. Alternatively, the 8-bit
parallel microcontroller interface can be used for configuration
and data exchange.
Pin Functions
Name
Pin Function
VDD, VCCA
GND, AGND
VDDM
+4 V to +5.5 V Digital and Analog Supply Voltage
Digital and Analog Ground
+3.0 to +5.5 V MT Counter Supply Voltage
LVCC
+4 V to +5.5 V LED Driver Supply Voltage
LED
RSET
VNSIN, VNCOS
ISIN, ICOS
LED Current Source Output
LED Power Control Adjustment
Inverted Sin/Cos Voltage Outp. [Alignm. D1, D0]
Sin/Cos Current Outputs
VREF
+2.5 V Reference Voltage Output
NPRES
Preset Input / Alignment Mode Enable
NRES
Reset Input / Reset Indication Output
NDIR
NERR
SCL
SDA
Code Direction Reversal
Error Message Output / System Error Input
EEPROM Interface, Clock Output
EEPROM Interface, Data Line
MDI D(15)

MT Interface, Data Input or Counter Input B
/ Parallel Data Output
MCL D(14)

MT Interface, Clock Output or Counter Input A
/ Parallel Data Output
SLO D(13)

I/O Interface, Data Output
/ Parallel Data Output [Alignm. V1 xor V13, TP]
MA
SLI
SYNC
NRD
NWR
D(12)
I/O Interface, Clock Input / Parallel Data Output
D(11)
I/O Interface, Data Input / Parallel Data Output
D(10)
Synchronization Input / Parallel Data Output
D(9) µC Read Signal / Parallel Data Output
D(8) µC Write Signal / Parallel Data Output
P(7...0) D(7...0) µC Data Bus / Parallel Data Output
NL µC Data Request Input / Par. Data Output Latch
TVN, TNN, TNP, TVP Test Mode Current Inputs
This tentative information shall not be considered as a guarantee of cha-
racteristics. Rights to technical changes reserved.
Key Specifications
General
Supply Voltage
MT Counter Supply
On-Chip Oscillator
LED Power Control
ESD Susceptibilty
Operational
Temperature Range
Chip Size
Packages
(RoHS compliant)
Options
4 V to 5.5 V, typ. 10 mA
3.3 V to 5.5 V, typ. 4 µA during power-down
5 MHz
50 mA max. (highside current source output)
2 kV (HBM 100 pF, 1.5 kΩ)
-20 °C to +90 °C
(-40 °C to +125 °C optional)
3.5 mm x 7 mm
40-pin BLCC LG5C (10.2 x 11.9 x 1.6 mm)
44-pin optoBGA LG21C (8.0 x 10.0 x 1.6 mm)
on-chip reticle, reference code discs
Position Acquisition
Singleturn Resolution to 21 bits / 360° (@ sin/cos 8,192 PPR)
Multiturn Resolution to 24 bits
Angle Resolution
Disc LG2S 42-2048: 11+8 bits (524,288 CPT)
Disc LG3S 42-4096: 12+8 bits (1,048,576 CPT)
Absolute Angle
Accuracy
+/- 1 LSB @ 19 bits
(mounted within 0.7 degree tilt angle)
Operating Speed 12,000 RPM max.
Temperature Monitoring
Range, Resolution -64 °C to +191 °C, resolution 1 °C (LSB)
Alarm Output
adjustable high/low alarm thresholds
Data Interfaces
Serial I/O Interface
μC Interface
MT Interface
Analog Outputs
EEPROM Interface
BiSS C, uni-/bidirectional, to 10 MHz
SSI, binary or Gray coded, to 4 MHz
8-bit data bus, 1 MHz access cycle per byte
2-pin A/B quadrature counter, to 300 Hz
2-pin serial SSI (200 kHz, 12+1 to 24+1 bit,
1 binary word or 3 to 6 Gray-coded words)
calibrated sine/cosine, 250 mVp, to 500 kHz
I²C compatible, to 16 kbit, CRC error detection
Data And Control Registers (RAM)
Position Data
3 bytes for singleturn (with interpolation),
3 bytes for multiturn, 2 bytes for CRC
Temperature Data 1 byte
Calibration Data
Configuration and
Operation
5 bytes (signal conditioning, temperature sensor)
33 bytes CRC-protected configuration, error byte,
life counter byte, command/status byte;
BiSS C direct access registers (bank switch,
EDS, profile, S/N, ID and measurement data)
Operational Functions
Parameterization
interface mode, resolution, disc model, multiturn
functions, output formats, code direction, alarm
messaging
Position Preset
via interfaces, or pin-triggered execution
Monitoring & Alarm missing code step, corrupted single/multiturn
data (disc error), EEPROM link error, illumination
error (LED end-of-life), out-of-range temperature
Test and Alignment analog sensor stimulation, alignment aids for
radial position and tilt angle
Setup
EEPROM, μC Interface or serial I/O (BiSS C)
Am Kuemmerling 18 • D-55294 Bodenheim, Germany
Tel. [phone] • Fax [phone] • http://www.ichaus.com
Rev. 1.0