6-Channel Phased Array Opto Encoder Series

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Devices in the iC-PT series and iC-LTA are versatile optical encoder iCs with integrated photosensors whose signals are converted into voltages by low-noise transimpedance amplifiers. Precise voltage comparators with hysteresis are used to generate the digital signals, supplied to the output pins via CMOS/TTL-compatible differential push-pull drivers.

The built-in LED controller with its 40 mA high-side current source directly powers the encoder LED and maintains the operating point regardless of LED aging or changes in temperature. The optical receiver power is kept constant using several A/B track photodiodes for averaging.

• Incremental encoders
• BLDC motor commutation

Selection input SEL enables three different operating modes to be selected: regular A/B operation, A/B operation with 2-fold interpolation or analog operation (inspection and monitoring encoder assembly).

Typical applications for iC-PT iCs and iC-LTA include incremental encoders for motor feedback and commutation. To this end, the iCs provide differential scanning for the A/B tracks and the Z index track and single-ended scanning on three additional tracks, generating commutation signals for multipole BLDC motors depending on the code disc applied.

iC-Haus iC_PT_001

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized iC-Haus distributor.


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Excellent signal matching due to monolithic integration
Very compact size for small encoders
Moderate track pitch for relaxed assembly tolerances
Low-noise signal amplifiers with high EMI tolerance
Single-pin programming of 3 operating modes: analog, digital, and x2 interpolation
A-AND-B gated Z index signal
Complementary outputs: A, B, Z and NA, NB, NZ
3 independent commutation tracks with U, V and W outputs
All outputs +/- 4 mA push-pull, current-limited and short-circuit-proof
Illumination control with a 40 mA high-side LED driver
Single 3.5 V to 5.5 V operation
Very low power consumption
Operating temperature range of -40 to +85 C (+120 C)


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iC-Haus PT5S33-2500 Datasheet

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