AK4118AEQ

The AK4118AEQ is a digital-audio interface IC from Asahi Kasei Microdevices (AKM), part of the AK411x family. It is used in audio gear to receive digital PCM data from S/PDIF/IEC 60958 sources (and often optical/coaxial), recover and reclock the data, and provide clean I2S/left-justified outputs to a DAC or further digital circuitry. It typically supports high-resolution PCM (24-bit) and sample rates up to 192 kHz, with on‑chip clock management to reduce jitter, plus selectable data formats and word lengths. The “AEQ” suffix mainly denotes package/version variants.
Common use cases include CD/DVD players, AV receivers, DAC boards, and other multi‑channel audio hardware needing reliable digital input handling and timing correction before conversion to analog.
Note: exact features, pinout, and power requirements vary by revision; consult the official AKM datasheet for precise specs.

There are few true pin‑for‑pin drop‑ins for the AK4118AEQ. Functionally equivalent S/PDIF/AES digital audio receiver ICs include:
- Cirrus Logic CS8412 / CS8416
- Texas Instruments DIR9001
- Other AKM family devices (AK4113/AK4114)
Verify pinout, register set and feature differences before substituting.

Here are the typical features for the AK4118AEQ (AKM) family:
- 24-bit stereo PCM DAC/receiver with SPDIF (IEC 60958) input
- Clock/data recovery with jitter reduction (internal PLL)
- Supports sampling rates from 32 kHz to 192 kHz
- Digital interface outputs: I2S and other common formats (left-justified PCM)
- De-emphasis support and pop/noise suppression on power-up/power-down
- Soft mute and protection features on power cycles
- Small on-chip control via I2C (configuration of mute, de-emphasis, status, etc.)
- Low-power standby mode and robust thermal/power management
Note: exact features can vary by package/variant; refer to the specific datasheet for AK4118AEQ for precise specs.

- Pin count: 28 pins (package code AEQ).
- Function: Asahi Kasei AK4118AEQ is a 24-bit stereo S/PDIF receiver/digital audio interface. It decodes incoming S/PDIF data and provides digital PCM data (I2S) to a DAC, supporting up to high-resolution formats (e.g., 24-bit, up to 192 kHz) with an internal PLL.

The AK4118AEQ is manufactured by Asahi Kasei Microdevices (AKM). AKM is a Japanese semiconductor company that designs and manufactures analog and mixed‑signal integrated circuits—particularly high‑performance audio ICs (DACs, ADCs, audio interfaces), timing devices and related semiconductor products—for consumer audio, professional audio, automotive and industrial markets.

AK4118AEQ is an AKM multi‑channel digital audio input interface with built‑in sample‑rate conversion and AES/EBU and SPDIF compatibility. Typical applications include:
- AV receivers and home theater systems
- CD/DVD/Blu‑ray players and digital audio front‑ends
- Digital DAC boards and network/streaming audio players
- Professional audio gear (digital mixers and interfaces)
- Set‑top boxes and game consoles
- Car audio and infotainment systems
In short: any device needing high‑quality digital audio input (AES/EBU/SPDIF) with I2S/PCM outputs.

AK4118AEQ comes in an 8-pin SOP (SOIC-8) package.