iC-LNB oQFN38-7x5 LNB1R

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18-Bit Opto Encoder with SPI and SER/PAR Interfaces (reticle LNB1R / 3xx80353)

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Article description

Product description

iC-LNB is an optoelectronic encoder IC for absolute linear and angle measuring systems, such as glass scales and encoders. Photodiodes, amplifiers, and comparators, the entire signal conditioning unit, and interfaces for position data output have been monolithically integrated into the device.

By help of the unique FlexCount circuit any angle resolution between 4 to 2¹⁸ angle steps per revolution can be preset for the incremental signals and the absolute position value.

Features

Absolute singleturn resolution of up to 18 bit
Incremental quadrature outputs with 1 to 65,536 CPR and programmable index signal
3.3 V-compatible SPI and I/O ports for configuration and data
Serial data readout in 1 µs cycles at 16 MHz clock frequency
System-on-chip design for excellent reliability
Leading/trailing sampling of 10 binary tracks pitched at 400 µm
Analog sine/cosine scanning with enlarged photodiodes, signal conditioning and fast 8-bit vector-tracking interpolation
Unique FlexCount® circuit: freely selectable resolution for absolute and incremental data
LED illumination control by 50 mA high-side current source (sin²+cos² or sum control modes)
Alarm indication for configuration or illumination error
Permanent RAM monitoring by parity bits
Parallel position data output for 16 bit
Operation at 4 V to 5.5 V within -40 °C to 110 °C
30-pin optoBGA or 38-pin optoQFN package for SMT
Illumination: iC-SN85 BLCC SN1C (850 nm encoder LED)
Code discs:
- LNB1S 42-1024 (1024 PPR, Ø 42 mm/18 mm)
- LNB4S 26-1024 (1024 PPR, Ø 26.0 mm/9.6 mm)

Applications

Optical position sensors
Absolute rotary encoders
Programmable incremental encoders
Motor feedback systems
Linear scales