The nRF5340 Audio Development Kit (DK) is a hardware development platform that demonstrates the use of the nRF5340 Audio application.
The DK is the recommended platform for Bluetooth® Low Energy Audio products and contains everything needed to start development. The DK is configurable and can function as a Universal Serial Bus (USB) dongle to send or receive audio data from a computer. It can also function as a business headset, a broadcast receiver, or a True Wireless Stereo (TWS) earbud. For most use cases, we recommend using two or more DKs.
The three main components of the DK are the nRF5340 System on Chip (SoC), nPM1100 Power Management Integrated Circuit (PMIC), and Cirrus Logic's CS47L63 Audio DSP. The CS47L63’s high-performance DAC and differential output driver are optimized for direct connection to an external headphone load. It is perfect for earbuds and direct speaker output.
The new Low Complexity Communications Codec (LC3) is also available and can be used with this DK. It replaces Bluetooth Classic’s Low Complexity Subband Codec (SBC). The LC3 codec has superior audio quality compared to SBC, even at about half the wireless data rate. This low data rate is a key factor in minimizing the power consumption of your products.
Key features
- Nordic Semiconductor’s nRF5340 Bluetooth LE or multiprotocol SoC
- Nordic Semiconductor’s nPM1100 power management SoC
- CS47L63 AD-DA converter from Cirrus Logic dedicated to TWS devices
- Stereo analog line input
- Mono analog output
- On-board Pulse Density Modulation (PDM) microphone
- Computer connection and battery charging through USB-C
- Second nRF5340 SoC that works as an onboard SEGGER debugger
- SD card reader (no SD card supplied)
- Five user-programmable buttons and LEDs
- DK contains several voltage and current monitors. This enables higher accuracy current measurement using dedicated current measurement pins. The use of Nordic’s Power Profiler Kit II is recommended.
- Normal operating temperature range 10–40°C
- Embedded battery charge system
- Rechargeable Lithium-Polymer (Li-Po) battery with 1500 mAh capacity
nRF5340 aQFN94 SoC
- Application core
- 128 MHz or 64 MHz Arm® Cortex®-M33 with TrustZone® technology
- 1 MB flash and 512 kB low leakage RAM
- Arm TrustZone CryptoCell™-312 security subsystem
- Quad Serial Peripheral Interface (QSPI) for communicating with an external flash memory device
- Near Field Communication (NFC)-A tag with wake-on field and touch-to-pair
- Up to five Serial Peripheral Interface (SPI) master/slave with EasyDMA
- Up to four Inter-integrated Circuit (I2C) compatible two-wire master/slave with EasyDMA
- Up to four Universal Asynchronous Receiver/Transmitter (UART) (Clear to Send (CTS)/Request to Send (RTS)) with EasyDMA
- Audio peripherals: I2C, digital microphone interface (PDM)
- Up to four Pulse Width Modulation (PWM) units with EasyDMA
- 12-bit, 200 ksps ADC with EasyDMA, eight configurable channels with programmable gain
- Full-speed (12 Mbps) USB device
- Network core
nPM1100 PMIC
- 400 mA linear Li-ion/Li-Po battery charger with thermal protection
- Automatic trickle, constant current, and constant voltage charging
- Battery thermal protection
- Discharge current limitation
- 1.8 V–3.0 V, 150 mA step-down buck regulator
- Automatic transition between hysteretic and PWM modes
- Forced PWM mode for clean power operation
- Input regulator with USB compatible current limit of 100 mA and 500 mA
- 4.1 V–6.7 V input voltage range for normal operation
- LED drivers for charger state indication
- 2.3 V–4.35 V battery operating input range
Due to the following safety concerns the battery in this product shall only be removed and replaced by qualified professionals:
- Replacing the battery with an incorrect battery type can cause a fire or explosion.
- Disposing the battery into a fire or hot oven, crushing it mechanically, or cutting it, can cause an explosion.
- Leaving the battery in an environment with an extremely high temperature can cause an explosion or the leakage of flammable liquid or gas.
- Subjecting the battery to extremely low air pressure can cause an explosion or the leakage of flammable liquid or gas.
The nRF5340 Audio DK must not be operated outside the internal battery’s charge and discharge temperature range between +10°C and +60°C or stored or transported outside the internal battery’s storage temperature range between -10°C and +45°C.
The power supply adapter must meet PS1 requirements.
Radio frequency notice
The nRF5340 Audio DK operates in the 2.4 GHz ISM radio frequency band. The maximum radio frequency power transmitted in the frequency band in which the DK operates equals +3 dBm (2 mW).