Interface to a HIPERFACE Position Encoder Reference Design


Design files


The TIDA-00202 reference design implements an EMC compliant industrial hybrid analog and digital interface to a HIPERFACE position encoder. A 3.3V supply RS485 transceiver with IEC-ESD and IEC-EFT protection is used for the bidirectional parameter channel. For the analog sin/cos signal channel, two options are provided to offer flexibility for connection to processors with and without embedded ADC or redundancy by using both options simultaneously. The first option features a fully differential dual 12-bit ADC with SPI output, the second option features a dual differential input with single-ended analog output (0-3.3V). The design features an industrial compliant 24V input with wide range from 16V to 36V. The power supply for the encoder can be configured from 7 to 12V (default 11V) and offers short-circuit protection. A 3.3V I/O connector with analog and logic signals provides an easy interface to a host processor with HIPERFACE master IP core. For quick evaluation an example firmware is available for a C2000™ Piccolo MCU to calculate the absolute angle position and display it through virtual COM port.

  • EMC Compliant Interface to HIPERFACE Position Encoders with Digital Bidirectional Parameter Channel up to 38400 Baud and Analog Sin/Cos Channel with at least 150kHz Bandwidth.
  • 3.3V Supply Half-Duplex RS485 Transceiver with 12kV IEC-ESD and 4kV IEC-EFT.
  • Dual Signal Path Option for Sine and Cosine Signals with either Dual 12-bit ADC with SPI Output or Dual Analog Output (0-3.3V) to Offer Flexibility for Connection to MCU with and without Embedded ADC.
  • Host Processor Interface (3.3V I/O) for Easy Connection to MCU like C2000™ for the HIPERFACE Master.
  • Example Firmware on C2000™ Piccolo MCU to Calculate and Display the Interpolated Absolute Angle from HIPERFACE Position Encoders.
  • Designed to Meet EMC Immunity for ESD, Fast Transient Burst, and Surge with Levels according to IEC61800-3.
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUB64A.PDF (2851 K)

Reference design overview and verified performance test data

TIDRJH1.PDF (1279 K)

Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRJH5.ZIP (5817 K)

Files used for 3D models or 2D drawings of IC components

TIDCBL4.ZIP (2025 K)

Design file that contains information on physical board layer of design PCB

TIDRJH4.PDF (4667 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

RS-485 & RS-422 transceivers

SN65HVD723.3-V half-duplex RS-485 with IEC ESD, 250 kbps

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS54013.5V to 42V Input, 0.5 A Step Down Converter

Data sheet: PDF | HTML
Buck converters (integrated switch)

TPS56020017V Input, 500mA Synchronous Step-Down Regulator in SOT-23 with Advanced Eco-Mode™

Data sheet: PDF | HTML

TLV32025.5-V, high-speed, dual push-pull comparator

Data sheet: PDF | HTML
ESD & surge protection ICs

TPD2E007Dual 10-pF, ±13-V, ±8-kV ESD protection diode for AC Signal Data Interfaces

Data sheet: PDF | HTML
Fully differential amplifiers

THS4531AUltra Low Power, RRO, Fully-Differential Amplifier

Data sheet: PDF | HTML
High-speed op amps (GBW ≥ 50 MHz)

OPA23652.2V, 50MHz, Low-Noise Single-Supply Rail-to-Rail Operational Amplifiers

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP2954250-mA, 30-V, low-dropout voltage regulator

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS717150-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS799200-mA, low-IQ, low-dropout voltage regulator with low-noise & enable

Data sheet: PDF | HTML
Precision ADCs

ADS725412 Bit, 1 MSPS, Dual, Simultaneous Sampling Differential SAR ADC

Data sheet: PDF | HTML
Shunt voltage references

TLV4311.5% accuracy, low-voltage, adjustable precision shunt regulator

Data sheet: PDF | HTML

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Design tools & simulation

Simulation model

TIDA-00202 Simulation — TIDM038.ZIP (271 K)

Technical documentation

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* Design guide Interface to a HIPERFACE Position Encoder Design Guide (Rev. A) Mar. 03, 2016

Related design resources

Hardware development

LAUNCHXL-F28069M F28069M LaunchPad™ development kit for C2000™ Piccolo™ MCU

Reference designs

TIDA-00176 Interface to Sin/Cos Encoders with High-Resolution Position Interpolation Reference Design TIDA-00177 Two-Wire Interface to a HIPERFACE DSL® Encoder Reference Design TIDA-00180 Power Supply with Programmable Output Voltage and Protection for Position Encoder Interfaces

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