RFQ Bluetooth. Design of an electronic circuit, for BT antenna
The requested work consists in the design of a turnkey, low power, Bluetooth development board based on a Texas instrument CC2541.
The requested development is separated into two workloads, and one option:
• Schematic design
• Board Rooting and PCB manufacture
Option: Delivery of 4 prototypes fully soldered and tested.
= DESIGN REQUIREMENTS
REQUIREMENT-1: The requested board is intended to be used for Low Power Bluetooth applications development. RF design rules for schematics design and PCB rooting shall be respected.
REQUIREMENT-2: The main microcontroller used for the board is the Texas instrument C2541. Guide lines and reference design from Texas instruments will be provided.
REQUIREMENT-3: The requested board shall be designed for low power consumption.
REQUIREMENT-3.1: The TPS62730 or equivalent circuit shall be integrated into the design for current saving purposes.
REQUIREMENT-3.2: All components used for the board design shall be lower power consumption components.
REQUIREMENT-4: The requested board shall be able to use two different power supplies sources.
REQUIREMENT-4.1: the default power supply source is 3V CR2032 coin cell battery. The requested board shall contain a CR2023 connector.
REQUIREMENT-4.2: the requested board shall be able also to be powered by an external 5V DC power supply. Additional DC/DC regulator 5V to 3V is required.
REQUIREMENT-4.3: Selection between power supplies sources is done manually by means of a micro switch or jumper.
REQUIREMENT-4.4: LEDs could be included in order to indicate which power supply source is active.
REQUIREMENT-4.5: an image of the active power supply shall be connected to an analog input of the C2541 microcontroller for power supply monitoring purposes.
REQUIREMENT-5: The requested board shall be able to use several antennas:
REQUIREMENT-5.1: The primary antenna is a PCB antenna. Guide lines and reference design from Texas instruments will be provided.
REQUIREMENT-5.2: Three other SMA connectors shall be provided in order to be able to connect external antennas. All required electronic components for the external antennas shall be integrated in the design.
REQUIREMENT-5.3: The selection of the active antenna (Primary PCB or SMA [1...3]) shall be performed using a low noise analog switch. The digital IOs of the CC2541 microcontroller will be used for antenna selection.
REQUIREMENT-6: The requested board shall contain a serial bus low power nonvolatile memory with at least 512 byte of data connected to the C2541 microcontroller.
REQUIREMENT-7: The board shall contain the digital acceleration sensor BMA250 .
REQUIREMENT-8: The requested board shall allow the programming and the RESET of the C2541 microcontroller
REQUIREMENT-8.1: The designed board shall provide a programming connector for CC2541 microcontroller programming. Guide lines and reference design from Texas instruments will be provided.
REQUIREMENT-8.2: The designed board shall provide a push button that allows the RESET of the CC2541 microcontroller.
REQUIREMENT-9: The requested board shall provide additional LEDs and push buttons for debugging purposed
REQUIREMENT-9.1: The requested board shall provide 4 LEDs connected to spare C2540 outputs. These LEDs will be used for debugging purposes.
REQUIREMENT-9.2: The requested board shall provide 4 Pushbuttons connected to spare C2540 inputs. Multiplexed Pushbuttons or analog keyboard could be used.
REQUIREMENT-9.3: The requested board shall provide test points for debugging purposes (power supplies, antenna selection pins, nonvolatile memory communication bus, TPS62730 Vin, Vout, On/ByPass,..)
= EXPECTED DELIVERIES
- Schematics of the development board
- PCB manufacturing files
- Estimation of the attenuation added by the antenna selection circuit.
- Measurement of current consumption during IDLE mode and during Bluetooth Transmission