Automotive Bluetooth® Low Energy car access satellite node reference design


Design files


This reference design is intended for Passive Entry Passive Start (PEPS) car access systems that utilize Bluetooth® Low Energy (BLE) technology to determine the location of a key fob. The design exhibits how a vehicle BLE satellite node can be implemented to calculate the angle of arrival (AoA) from a BLE signal and transmit the AoA data via local interconnect network (LIN) using only a single BLE wireless microcontroller and LIN transceiver. Furthermore, the design demonstrates that accurate AoA information can be calculated using only two dipole antennas reducing the printed circuit board (PCB) solution size.

  • Measure AoA using BLE with only 2 dipole antennas
  • Share BLE connection information, AoA and RSSI information via LIN
  • Small 45.72 mm × 76.2 mm (1.9" × 3.0") PCB solution size
  • Low-power sleep mode with remote wake over LIN < 25 µA at 14 V
  • DC input voltages from 4.65 V to 40 V and load dump voltages up to 45 V
  • Compatible with TI's Real Time Locationing System (RTLS) software toolbox for triangulation and trilateration of a BLE key fob
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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.

TIDUE70A.PDF (4845 K)

Reference design overview and verified performance test data


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


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

TIDCF26B.ZIP (499 K)

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

TIDRXY0.PDF (1062 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Automotive wireless connectivity products

CC2640R2F-Q1SimpleLink™ automotive qualified 32-bit Arm Cortex-M3 Bluetooth® Low Energy wireless MCU

Data sheet: PDF
LIN transceivers

TLIN1029-Q1Local interconnect network (LIN) transceiver with dominant state timeout

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

TPS7B82-Q1Automotive 300-mA, off-battery (40-V), ultra-low-IQ LDO with enable in AEC-Q100 Grade-0 and Grade-1

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Automotive Bluetooth® Low Energy Car Access Satellite Node Reference Design (Rev. A) Jan. 15, 2019
Application note Bluetooth® Angle of Arrival (AoA) Antenna Design (Rev. A) PDF | HTML Jun. 07, 2023

Related design resources

Software development

SIMPLELINK-CC2640R2-SDK SimpleLink™ CC2640R2 SDK - Bluetooth® low energy

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