The AK4112B is a digital audio receiver (DIR) from Asahi Kasei that is compatible with 96kHz, 24 bits. It supports consumer and professional mode channel status decoding. The AK4112B can automatically detect a non-PCM bit stream. When combined with an AK4527B multi-channel codec, the two chips provide a system solution for AC-3 applications. The dedicated pins or a serial µP I/F can control the mode setting. The small package, 28-pin VSOP or 28-pin QFN, saves board space.
The AK4112B is a digital audio receiver (DIR) that supports 96 kHz, 24‑bit audio and can decode both consumer and professional channel status. It offers four audio input channels, a through‑transmission output, and optional non‑PCM detection pins, making it suitable for AC‑3 and other multichannel audio applications.
Key features include low‑jitter analog PLL, multiple clock sources, master/slave audio interface modes, two master‑clock outputs, and a compact 28‑pin VSOP/QFN package. The datasheet details absolute maximum ratings, recommended operating conditions, pin assignments, and timing diagrams for both serial and parallel operation.
| Audio Sample Rate | 96 kHz |
|---|---|
| Audio Bit Depth | 24 bit |
| Operating Voltage | 2.7 V to 3.6 V (5 V tolerance) |
| Temperature Range | -40 °C to 85 °C |
| Input Resistance (Zin) | 10 kΩ |
| Input Voltage Threshold (VTH) | 350 mVpp |
| Master Clock Outputs | Two outputs, 128fs/256fs/512fs |
The device operates from –40 °C up to 85 °C.
It provides four channel receivers input and one through‑transmission output.