Universal Digital Interface to Absolute Position Encoders Reference Design TIDA-00179 (ACTIVE)

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Key Document

Description

The TIDA-00179 reference design is an EMC compliant universal digital interface to connect to absolute position encoders, like EnDat 2.2, BiSS®, SSI or HIPERFACE DSL®.  The design supports a wide input voltage range from 15-60V (24V nom). A connector with 3.3V logic I/O signals allows for direct interface to the host processor like Sitara AM437x or Delfino F28379 to run the corresponding master protocol.

Master implementations are available on Sitara AM437x (EnDat2.2, BiSS and HIPERFACE DSL) or Delfino DesignDRIVE (EnDat2.2 and BiSS). The TI design allows the host processor to select between a 4-wire encoder interface like EnDat 2.2 and BiSS or a 2-wire interface with power over RS485 like HIPERFACE DSL. To meet the selected encoder's supply range, the design offers a programmable output voltage with either 5.25V or 11V. This design’s power supply offers protection against over-voltage and short circuit according to the selected encoder’s voltage range to prevent damage during a cable short. TIDA-00179 has been tested up to 100m cable length with EnDat 2.2 and 2-wire HIPERFACE DSL encoders.

Features
  • Universal Hardware to Interface to EnDat 2.2, BiSS, SSI and 4-Wire or 2-Wire HIPERFACE DSL Encoders. Supports All Corresponding Standard Data Rates up to at least 100m Cable Length.
  • 3.3-V Supply Half-Duplex RS485 Transceiver SN65HVD78 with 12kV IEC-ESD and 4kV EFT Eliminates Cost for External ESD Components.
  • Encoder P/S with Wide Input Range (15-60V)  Offers Programmable Output Voltage 5.25V or 11V, Compliant to EnDat 2.2, BiSS or HIPERFACE DSL Encoders.
  • OV, UV and Precise Over-Current Limit with Short-Circuit Protection Leveraging TI eFuse Technology with Current Monitor and Fault Indicator.
  • Logic Interface (3.3V I/O) to Host Processors like host processor like Sitara AM437x or Delfino F28379 to run the EnDat 2.2, BiSS, SSI or HIPERFACE DSL Master. Master implementations are available on Sitara AM437x (EnDat2.2, BiSS and HIPERFACE DSL) or Delfino DesignDRIVE (EnDat2.2 and BiSS).
  • Design Exceeds EMC Immunity for ESD, Fast Transient Burst, and Surge and Conducted RF with Levels according to IEC61800-3.

See the Important Notice and Disclaimer covering reference designs and other TI resources.


  



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Design Files

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TI Devices (11)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17483F4  30V, N-Channel FemtoFET™MOSFET  MOSFETs  Sample & Buy Not Available
CSD23381F4  12V , P-Channel FemtoFET™MOSFET  MOSFETs  Sample & Buy Not Available
CSD25402Q3A  P-Channel NexFET Power MOSFET  MOSFETs  Sample & Buy Not Available
LM2903  Dual Differential Comparator  Amplifiers  Sample & Buy Not Available
SN65HVD78  3.3 V Half-Duplex RS-485, with IEC ESD, 50 Mbps  Interface  Sample & Buy View Design Kits & Evaluation Modules
SN74CBTLV3257  4-channel, 2:1 analog switch with power-off protection  Switches & multiplexers  Sample & Buy View Design Kits & Evaluation Modules
THVD1450  3.3-V to 5-V RS-485 transceiver with ±18-kV IEC ESD protection   Interface  Sample & Buy View Design Kits & Evaluation Modules
TMUX1574  Low-capacitance, 2:1 (SPDT) 4-channel, powered-off protection switch with 1.8-V logic  Switches & multiplexers  Sample & Buy View Design Kits & Evaluation Modules
TPS24750  18V, 12A, 3mΩ eFuse with IMON and PG  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS54060A  3.5V to 60V Input, 0.5A Step-Down Converter with Eco-Mode  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS54061  4.7V to 60V Input, 200mA Synchronous Step-Down Converter with Low IQ  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD25402Q3A VSONP (DNH)| 8 Download
LM2903 Download Download
Download Download
Download Download
Download -
Download Download
SN65HVD78 Download
Download
Download
SN74CBTLV3257 Download Download
Download Download
Download Download
Download Download
Download Download
Download Download
THVD1450 Download Download
Download Download
Download Download
TMUX1574 Download
Download
TPS24750 Download
TPS54060A Download
Download
TPS54061 Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 3093 23 Nov 2015
Design files (6)
Title Type Size (KB) Date
ZIP 559 01 Oct 2015
ZIP 4041 01 Oct 2015
PDF 4119 01 Oct 2015
PDF 536 01 Oct 2015
PDF 57 01 Oct 2015
PDF 957 01 Oct 2015
Related Tools & Software

Reference Designs  ( 6 )


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