AK4118AEQ

Overview

The AK4118AEQ is a digital audio transceiver supporting 192kHz sampling rates and 24-bit resolution. It features an 8-channel receiver input selector, a 2-channel transmission output (Through or DIT), and an auxiliary digital input. The device includes an AES3/IEC60958/S/PDIF compatible receiver with low jitter analog PLL for clock recovery from 8kHz to 192kHz. Control is managed via dedicated pins or a serial µP interface (I2C/SPI). Operating voltage ranges from 2.7V to 3.6V, with the input buffer tolerant up to 5.5V. It is housed in a compact 48-pin LQFP package.

Feature Summary

• Supports AES3, IEC60958, S/PDIF, and EIAJ CP1201 standards with automatic Non-PCM bit stream detection.
• Integrates an 8:1 receiver input selector and a 2-channel transmitter output capable of Through or DIT modes.
• Features a low jitter Analog PLL for clock recovery across a wide lock range of 8kHz to 192kHz.
• Includes comprehensive detection functions such as Sampling Frequency, DAT Start ID, Parity Error, and Validity Flag.

Applications

• Digital audio equipment interfacing
• AC-3 system solutions when combined with multi-channel codecs

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct temperature grade and packaging configuration. Confirm that the 48-LQFP footprint matches the target PCB design, noting the 0.5mm pitch. Ensure power supply decoupling meets the recommended operating conditions for stable PLL performance.

Selection Notes

Select this component for applications requiring high-channel-count digital audio reception with flexible output routing. The device supports both parallel and serial control modes, allowing adaptation to different system architectures. Verify that the external crystal frequency aligns with the required sampling rate detection methods, either through clock comparison or channel status information.

Part Context

The AK4118AEQ belongs to the AK4118A series of digital audio interfaces. It serves as a direct replacement for the standard AK4118, offering enhanced master clock output capabilities and improved jitter specifications. The 'EQ' suffix denotes the specific tape and reel packaging variant suitable for automated surface-mount assembly processes.

Replacement Considerations

The AK4118A is functionally compatible with the AK4118 but includes differences in master clock output behavior and register settings. Review the compatibility section of the datasheet to adjust control logic accordingly.