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notice or liability. All information is subject to TT Electronics’ own data and is

considered accurate at time of going to print.

TT Electronics | OPTEK Technology

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www.ttelectronics.com | sensors@ttelectronics.com

Rev C, 4/27/2023

Page 1

© TT electronics plc

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.

How we help you:

• Accelerate time-to-market by reducing engineering cost and

effort

• Reduce portfolio complexity with a “one-size-fits-many”

solution

• Increase manufacturing throughput and cost efficiency

• Promote product innovation

Features and Benefits:

• 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.

o

Customizable quadrature- and index-track dimensions

o

Analog or digital quadrature-track output

o

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).

• Programmable auto-configuration simplifies assembly and alignment.

• Closed-loop LED drive control

• IR LED embedded in the same package (FS310 only)

• Diagnostic functionality:

o

High-temperature fault (with interrupt signaling feedback)

o

LED-drive control loop out of regulation (with interrupt signaling feedback)

o

Power-on reset (with interrupt signaling feedback)

o

Code-wheel eccentricity

• 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:

o

THD ≤ 1.0% on analog outputs

o

Transient noise ≤ 1.0% of signal amplitude on analog outputs at 40mW/cm2 input power density

o

Angular position accuracy ±1 part in 64K, or about 20 arc-seconds at 2048 PPR, on digital outputs

• Single-supply (3.3V ± 10%) operation

FS210

FS310

Near-IR LED Chip