Asahi Kasei Microdevices/AKM AK4114VQ

Overview

AK4114VQ from Asahi Kasei is a 192kHz/24-bit digital audio transceiver IC supporting AES3, IEC60958, S/PDIF, and EIAJ CP1201 standards. It integrates an 8-channel receiver, 2-channel transmitter (through or DIT), low-jitter analog PLL with 32–192kHz lock range, and serial μP interface for mode control. Used in AC-3 system solutions when paired with AK4527B/AK4529 codecs.

For engineers reviewing the AK4114VQ datasheet, AK4114VQ pinout, AK4114VQ application, or AK4114VQ equivalent, key selection considerations include its dual master clock outputs (MCKO1/MCKO2), non-PCM bitstream detection (AC-3/MPEG/DTS-CD), de-emphasis filtering at 32/44.1/48/96kHz, and support for both serial (I²C/4-wire) and parallel control modes.

Technical Context

The AK4114VQ implements a fully integrated digital audio interface with independent receiver and transmitter paths. Its analog PLL recovers clock from biphase-mark encoded streams with jitter performance optimized for high-resolution audio, and supports automatic sampling frequency detection across seven rates (32–192kHz) via channel status or crystal comparison.

It features dual operating modes: Serial Control Mode (with I²C or 4-wire interface) and Parallel Control Mode (using dedicated format and select pins). Clock source selection (PLL or crystal) and SDTO data source (RX or DAUX) are configurable via CM0/CM1 pins, enabling failover behavior in Mode 2 and monitoring capability in Mode 3.

Key Specifications

Pinout & Package

AK4114VQ is housed in a 48-pin LQFP package (0.5mm pitch) with exposed thermal pad. Pin functions support dual control modes, dual clock outputs, and full S/PDIF interface compliance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital audio transceiver applications.

Compared with CS8416-CZZ and PCM9211PFB, the AK4114VQ uniquely combines 8-channel reception, DIT-mode transmission, AC-3/MPEG/DTS-CD detection, and Q-subcode buffering - making it the only option among the three capable of full AC-3 system implementation with AK4527B/AK4529 codecs.

Availability

AK4114VQ is available at Aetrix Electronics and suitable for home theater receivers, professional audio distribution systems, DVD/Blu-ray players, and studio ADC/DAC interfaces requiring stable component supply and long-term obsolescence management.

Supply support for AK4114VQ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Asahi Kasei Microdevices (formerly Asahi Kasei Electronics) is a Japanese semiconductor company specializing in analog, mixed-signal, and audio ICs with strong IP in precision timing and signal integrity.

The AK4114VQ belongs to Asahi Kasei's high-fidelity digital audio interface product line, designed specifically for multiformat consumer and professional audio equipment requiring robust clock recovery, non-PCM bitstream awareness, and seamless integration with their codec portfolio.

FAQ

What is the maximum supported sampling rate for the AK4114VQ?

The AK4114VQ supports sampling rates from 32kHz up to 192kHz, with full PLL lock and jitter performance validated across this entire range. This includes all standard rates (44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz) and high-resolution studio rates. The AK4114VQ achieves stable lock within 20ms and maintains low-jitter operation essential for 24-bit audio fidelity.

Does the AK4114VQ support both consumer and professional S/PDIF modes?

Yes, the AK4114VQ's channel status decoder explicitly supports both consumer (IEC60958 Type I) and professional (AES3/IEC60958 Type II) modes. It extracts sampling frequency, pre-emphasis, and other metadata from byte 0–4 of the channel status word, with separate bit mappings for each mode as defined in Tables 4–6 of the datasheet. The AK4114VQ uses these values to configure de-emphasis and reporting registers accordingly.

How does the AK4114VQ handle AC-3 and DTS-CD bitstream detection?

The AK4114VQ detects AC-3 streams by identifying the 96-bit sync pattern (0x0000, 0x0000, 0x0000, 0x0000, 0xF872, 0x4E1F) and sets the AUTO bit; DTS-CD detection triggers the DTSCD bit upon recognizing its unique sync signature. Both flags remain asserted for 4096 frames after detection. The AK4114VQ stores subsequent burst preambles (Pc/Pd) and Q-subcode - functionality confirmed in Sections 13 and 23 of the datasheet.

Can the AK4114VQ generate master clocks for external DACs or ADCs?

Yes, the AK4114VQ provides two independent master clock outputs: MCKO1 and MCKO2. Their frequencies (64fs, 128fs, 256fs, or 512fs) are selected via OCKS1/OCKS0 pins and depend on the detected sampling rate - for example, 512fs is available up to 48kHz, while 128fs supports up to 192kHz. These clocks derive from either the recovered PLL clock or the crystal oscillator, ensuring phase-coherent timing for downstream converters.

What control interfaces does the AK4114VQ support?

The AK4114VQ supports two distinct control architectures: Serial Mode (selectable I²C or 4-wire interface using pins SDA/SCL or CCLK/CDTI/CSN/CDTO) and Parallel Mode (using dedicated format and select pins like DIF0–2, IPS0–1, CM0–1). P/SN pin selects between them. Both modes allow full register access for configuration, status readback, and real-time control of features like de-emphasis, MONO mode, and clock operation.