The Nordic nRF5340 Audio Development Kit contains three primary devices - an nRF5340 SoC, an nPM1100 PMIC, and Cirrus Logic’s CS47L63 Audio DSP. The CS47L63 high-performance DAC and differential output driver are intended for direct connection to an external headphone load. The CS47L63 is ideal for earbuds with mono-only and direct speaker output. The nRF5340 Audio DK is typically powered via USB and has a battery connector for a Li-Ion/Li-Po battery. The Power Profiler Kit II uses the dedicated current measurement pins to allow current consumption measurement.
The “Low Complexity Communications Codec” (LC3) that replaced Bluetooth Classic’s “Low Complexity Subband Codec” (SBC) is available on the nRF5340 audio development kit. The LC3 codec has superior audio quality than SBC, even at about half the wireless data rate. The low data rate is a critical factor in minimizing power consumption.