High-Performance Audio Codec with Integrated HiFi 3z and FastDSP Cores

The device is a low power, high-performance audio codec that provides three analog input channels, ten DMIC input channels, two PDM output channels, and one high-efficiency Class-D amplifier output channel.

The device features a low power HiFi 3z audio DSP core and a low-latency FastDSP core. The audio DSP cores paired with high-fidelity audio data converters are ideal for applications like noise cancellation, transparency, personal sound amplification, and voice processing.

When operating in low-power mode, the DSP cores are optimized for small form factor applications such as true wireless stereo (TWS) headphones. In this mode, the device delivers the right level of processing power while still minimizing power consumption to extend play time.

The device has the flexibility to also support applications requiring additional processing capability such as over-ear headphones, VR and AR headsets, wearables, hearing assist, and PSAP devices. In high-performance mode, the HiFi 3z core is boosted from 50Mhz to 200MHz, and the FastDSP supports double the number of instructions (up from 64 to 128). This increased processing capability can either be used to offload cycles from the host processor or enable a lower-cost host processor without requiring an additional external audio DSP or MCU.

The device supports a -40°C to +85°C temperature range and is available in a space-saving 77-ball WLCSP package (0.4mm pitch, 3.24mm × 4.83mm).

APPLICATIONS

* True wireless stereo (TWS) ANC headphones

* Over-ear stereo ANC headphones

* VR and AR headsets and wearable devices

* Hearing assist and PSAP devices

* Soundbar and smart speaker systems

* Gaming devices and tablets

* FastDSP™ audio processing engine

* Low latency at sample rates up to 768kHz

* Supports up to 128 instructions

* Tensilica® HiFi 3z DSP with TIE accelerators

* Quad MAC/cycle and 1024kB total memory

* 2-way SIMD IEEE floating point multiplier

* Supports both 50MHz and 200MHz modes

* 5μs group delay (analog input to amp output)

* 768kHz sample rate (FastDSP bypass mode)

* Three low power 24-bit ADC record channels

* 104dB SNR, -91dB THD+N, 0.6mW (PGA on)

* Flexible differential or single-ended inputs

* Ten digital microphone (DMIC) input channels

* Two clock outputs (384kHz to 6.144MHz)

* Mono low power 24-bit DAC playback channel

* 113dB SNR, -93dB THD+N, 1.4mW PQ

* High-efficiency, low-noise, Class-D amplifier