FlexSense® I-Series Programmable
Incremental Encoder
FS210/FS310 Datasheet
Description:
The FS210/FS310 contains a revolutionary optical sensor array
that can be programmed to operate with a wide range of code-
wheel diameters, including linear strips, and resolutions. This
programmable sensor is packaged standalone in a compact Opto-
QFN package for the FS210, and a near-IR LED is combined with
the sensor in the same package for the FS310. With unparalleled
flexibility and versatility in a robust, subcompact package, with
closed-loop LED driver control, with on-chip interpolation, and
with support for automated alignment and configuration, the
FlexSenseTM products redefine flexibility.
FS210
How we help you:
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Accelerate time-to-market by reducing engineering cost and
effort
Reduce portfolio complexity with a “one-size-fits-many”
solution
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Increase manufacturing throughput and cost efficiency
Promote product innovation
FS310
Near-IR LED Chip
Features and Benefits:
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Incremental optical encoder sensor IC in 32-pin 5mm x 5mm x 0.65mm OQFN package
Both transmissive (FS210) and reflective (FS310) variants available.
User-programmable, high-resolution photosensor pixel array enables quick customization and improves time-to-market.
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Customizable quadrature- and index-track dimensions
Analog or digital quadrature-track output
Compatible with code-wheel resolution of up to 635 lines per inch (LPI) with the possibility of resolutions up to
750 LPI (FS310, reflective). Transmissive disks have a maximum of half the resolution (FS210).
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Programmable auto-configuration simplifies assembly and alignment.
Closed-loop LED drive control
IR LED embedded in the same package (FS310 only)
Diagnostic functionality:
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High-temperature fault (with interrupt signaling feedback)
LED-drive control loop out of regulation (with interrupt signaling feedback)
Power-on reset (with interrupt signaling feedback)
Code-wheel eccentricity
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I2C interface
-40°C to +125°C ambient operating temperature
On-chip quad-track interpolation (2x, 4x, 8x) and division (by powers of 2 up to 2,048)
Quad-track output characteristics at native frequency up to 400kHz:
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THD ≤ 1.0% on analog outputs
Transient noise ≤ 1.0% of signal amplitude on analog outputs at 40mW/cm2 input power density
Angular position accuracy ±1 part in 64K, or about 20 arc-seconds at 2048 PPR, on digital outputs
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Single-supply (3.3V ± 10%) operation
General Note
TT Electronics | OPTEK Technology
2900 E. Plano Parkway, St 200, Plano, TX 75074, USA | Ph: +1 972 323 2200
www.ttelectronics.com | sensors@ttelectronics.com
TT Electronics reserves the right to make changes in product specification without
notice or liability. All information is subject to TT Electronics’ own data and is
considered accurate at time of going to print.
Rev C, 4/27/2023
Page 1
© TT electronics plc