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
- Network core
- 64 MHz Arm
Cortex-M33
- 256 kB flash and 64 kB low leakage RAM
- Bluetooth 5.2, IEEE
802.15.4-2006, 2.4 GHz enabled transceiver
- SPI master/slave with EasyDMA
- I2C compatible two-wire master/slave with EasyDMA
- UART (CTS/RTS) with EasyDMA
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
Warning:
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).