Build arround the ADAU1452 / ADAU1462 / ADAU1466 from Analog Devices with balanced 2-in / 6-out as well as support for I2S, SPDIF and TDM. This board is optimized for low noise performance and in particular to support all features of the ICEpower 300A1 and similary amplifier modules.
First prototyp build in 2014, redesigned in 2016 and the lastest version in 2021, mostly to substitute conflict materials like tantalum. The I2S input was tested with RaspberryPi 3/4/5 and ESP32S3.
- Balanced 2-in / 6-out
- Low idle noise without active mute circuit (compression driver requirement @ >100dB/1W/1m)
- Stereo 3-way active x-over with FIR support for mid-high
- Flexible I2S interaface
- 48V DC batterie operation
The Poor Engineer's Distortion Analyzer is a distortion analyzer based on the idea of KJBob (@ ADI EngineeringZone).
This is a loop back measurement (DSP->D/A->A/D->DSP). The readings are close to the datasheet specifications of the CS4398, but of course there is an uncertainty without external verification.
0.000527918% THD+N = -105.54dB (a-weighted)
_thd+n.jpeg)
0.000626624% THD+N = -104.06dB (a-weighted)
_thd+n.jpeg)
- Port eagle -> KiCad
The hardware is licensed under CC BY-SA 4.0