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Home > Products > Integrated Circuits (ICs) > Interface > CODECS

Asahi Kasei Microdevices/AKM AK4528VM

Name: AK4528VM
Brand: Asahi Kasei Microdevices/AKM
SKU: AK4528VM
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AK4528VM

Manufacturer:: Asahi Kasei Microdevices/AKM

Category:: CODECS

Package:: 28-SSOP (0.209", 5.30mm Width)

Datasheet:: AK4528VM.pdf

Description:: IC AUDIO CODEC 24BIT 28SSOP

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Product details

Overview

AK4528VM from Asahi Kasei Microdevices (AKM) is a high-performance 24-bit stereo audio CODEC optimized for 96kHz professional recording systems. It integrates dual-channel 24-bit ADCs with 64× oversampling and differential inputs (S/(N+D): 94dB, DR: 108dB), and dual-channel 24-bit DACs with 128× oversampling, SCF output filtering, and differential analog outputs (S/(N+D): 94dB, DR: 110dB). It operates at 5V analog/digital supply with 3V I/O interface support and targets low-noise studio-grade audio interfaces.

For engineers reviewing the AK4528VM datasheet, AK4528VM pinout, AK4528VM application, or AK4528VM equivalent, key selection considerations include its 28-pin SSOP package, 24-bit I²S/MSB-justified serial interface, integrated digital HPF and de-emphasis, soft mute functionality, and compatibility with AK4524-based designs requiring higher dynamic range.

Technical Context

The AK4528VM implements an Enhanced Dual Bit ADC architecture and an Advanced Multi Bit DAC architecture with switched-capacitor filter (SCF) output stages to achieve high jitter tolerance and low out-of-band noise. Its digital filters provide ±0.005dB passband ripple and ≥75dB stopband attenuation, with group delay of 30–31 LRCK cycles.

It supports both serial and parallel control modes via the P/S pin, with register-based configuration of sampling speed (DFS), master clock selection (CKS0/CKS1), audio interface format (DIF), de-emphasis (DEM0/DEM1), and channel-specific digital high-pass filtering (HPFL/HPFR). The 3-wire serial control interface (CSN/CCLK/CDTI) enables μP-based volume and mode management.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit ADC & DAC - Enables 110dB dynamic range and precise low-level signal capture in professional audio paths.
Sampling Rate Support	Up to 96kHz - Fully supports high-resolution audio workflows including DVD-Audio and studio mastering.
ADC S/(N+D)	94dB at 96kHz - Delivers clean digitization with minimal quantization + distortion noise in wideband applications.
DAC S/(N+D)	94dB at 96kHz - Ensures high-fidelity playback with low harmonic and intermodulation distortion.
Analog Supply	4.75–5.25V (VA/VD) - Compatible with standard 5V system rails; VT supports 2.7–5.25V for flexible output buffer biasing.
Digital Interface	I²S or MSB-justified 24-bit - Interoperable with common DSPs, FPGAs, and microcontrollers without format translation.
Package	28-pin SSOP (0.65mm pitch) - Surface-mount footprint suitable for compact audio PCB layouts with thermal and EMI isolation.

Pinout & Package

AK4528VM uses a 28-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, rated for −40°C to +85°C operation. Pin functions are validated per AKM MS0011-E-03 datasheet Rev. 3.

Pin/Terminal	Circuit Role	Design Meaning
VCOM	Common-mode voltage reference	Outputs VA/2 bias for differential ADC input and DAC output stages; critical for DC offset cancellation.
AINL+/AINL−, AINR+/AINR−	Differential analog inputs	Accept balanced line-level signals up to ±3.0Vpp; reject common-mode noise in studio cabling.
AOUTL+/AOUTL−, AOUTR+/AOUTR−	Differential analog outputs	Deliver low-noise, high-DR audio to external op-amps or transformers; full-scale output = 1.08 × VREF × Gain.
MCLK, BICK, LRCK	System clock inputs	Support master clock frequencies from 7.68MHz to 55.296MHz; enable normal (256fs–1024fs) and double-speed (×2 fs) modes.
SDTI/SDTO	Audio data I/O	Transmit/receive 24-bit I²S or MSB-justified data on rising/falling BICK edges; support 32fs–64fs bit clocks.
PDN	Power-down control	Hardware reset and initialization trigger; sets all registers to defaults and places ADC/DAC into Hi-Z or zero-output state.
P/S	Interface mode select	"H" = parallel mode (DIF pin selects I²S/MSB); "L" = serial mode (CDTI/CCLK/CSN enable register access).
DEM0/DEM1	De-emphasis control	Select 32kHz/44.1kHz/48kHz digital de-emphasis or disable; OR'd with register bits for hardware/software override.

Key Features

Feature	Design Value
Integrated digital HPF	Configurable per-channel cutoff at 0.9Hz (fs=44.1kHz), scalable with sample rate - eliminates DC offset without external components.
Soft mute with fade-in/out	−∞ dB attenuation over 1024 LRCK cycles, then smooth 0dB recovery - prevents audible pop/click during muting transitions.
128-step digital output attenuation (OATT)	0dB to −72dB in pseudo-log steps with 8031-cycle fade time - enables precise volume control without analog potentiometers.
SCF-based DAC output stage	Switched-capacitor filter reduces out-of-band noise and improves jitter tolerance - simplifies anti-aliasing design and enhances clock robustness.
3-wire serial control interface	CSN/CCLK/CDTI at ≤5MHz - allows microcontroller-based configuration of clocks, formats, de-emphasis, and mute without dedicated I²C/SPI peripherals.

Applications

Professional Audio Interface	Digital Mixing Console
Use Scenario: 24-bit/96kHz USB/FireWire audio interface connecting microphones/instruments to DAW software. IC Role / Device Role / Timing Role: Simultaneous high-fidelity ADC acquisition and DAC playback with synchronized LRCK/BICK timing and low-latency SCF output filtering. Use Value: Achieves 108dB ADC and 110dB DAC dynamic range, enabling transparent capture and monitoring of ultra-low-level transients and ambient detail.	Use Scenario: Channel strip processing in mid-tier digital mixers with analog I/O and internal digital routing. IC Role / Device Role / Timing Role: Dual-channel CODEC providing isolated ADC/DAC paths per channel, controlled via shared serial interface and synchronized to system MCLK. Use Value: Differential I/O and integrated digital HPF eliminate ground-loop noise and DC drift across 24 channels without discrete op-amp front-ends.
Studio Monitor Controller	High-End DAC Add-on Board
Use Scenario: Volume-controlled monitor switching unit with analog summing and headphone amplification. IC Role / Device Role / Timing Role: DAC-only operation with OATT-based digital volume control and soft mute, driven by I²S stream from FPGA or SoC. Use Value: 128-step pseudo-log attenuation and 1024-cycle fade eliminate zipper noise and switching artifacts during real-time level adjustments.	Use Scenario: PCIe or USB-to-I²S add-on card delivering premium audio to external amps using discrete analog stages. IC Role / Device Role / Timing Role: High-DR 24-bit DAC core with SCF output and de-emphasis support for legacy CD-format content playback. Use Value: On-chip 44.1kHz/48kHz de-emphasis and ±0.005dB filter ripple preserve original mastering intent without external DSP.

Professional Audio Interface

Digital Mixing Console

Use Scenario: 24-bit/96kHz USB/FireWire audio interface connecting microphones/instruments to DAW software.

IC Role / Device Role / Timing Role: Simultaneous high-fidelity ADC acquisition and DAC playback with synchronized LRCK/BICK timing and low-latency SCF output filtering.

Use Value: Achieves 108dB ADC and 110dB DAC dynamic range, enabling transparent capture and monitoring of ultra-low-level transients and ambient detail.

Use Scenario: Channel strip processing in mid-tier digital mixers with analog I/O and internal digital routing.

IC Role / Device Role / Timing Role: Dual-channel CODEC providing isolated ADC/DAC paths per channel, controlled via shared serial interface and synchronized to system MCLK.

Use Value: Differential I/O and integrated digital HPF eliminate ground-loop noise and DC drift across 24 channels without discrete op-amp front-ends.

Studio Monitor Controller

High-End DAC Add-on Board

Use Scenario: Volume-controlled monitor switching unit with analog summing and headphone amplification.

IC Role / Device Role / Timing Role: DAC-only operation with OATT-based digital volume control and soft mute, driven by I²S stream from FPGA or SoC.

Use Value: 128-step pseudo-log attenuation and 1024-cycle fade eliminate zipper noise and switching artifacts during real-time level adjustments.

Use Scenario: PCIe or USB-to-I²S add-on card delivering premium audio to external amps using discrete analog stages.

IC Role / Device Role / Timing Role: High-DR 24-bit DAC core with SCF output and de-emphasis support for legacy CD-format content playback.

Use Value: On-chip 44.1kHz/48kHz de-emphasis and ±0.005dB filter ripple preserve original mastering intent without external DSP.

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo audio CODEC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AK4524VN	Lower ADC/DAC dynamic range (100dB/104dB), single-ended inputs, no SCF, no soft mute, no digital HPF.	Targeted at cost-sensitive consumer audio; lacks studio-grade noise floor and differential I/O robustness.	Select AK4524VN only when budget constraints outweigh need for 108–110dB DR and differential signaling.
CS4272-CQZ	24-bit/192kHz capability, integrated analog PGA, lower power (25mA total), but no SCF output stage and fixed I²S-only interface.	Better suited for portable or multi-rate applications; lacks AK4528VM's 96kHz-optimized low-noise architecture and flexible format support.	Choose CS4272-CQZ when 192kHz sampling or ultra-low power is required, accepting trade-offs in out-of-band noise and interface flexibility.

Compared with AK4524VN, AK4528VM delivers +8dB ADC DR and +6dB DAC DR with differential I/O and SCF filtering; versus CS4272-CQZ, it offers superior jitter tolerance and configurable de-emphasis/HPF at the expense of maximum sample rate and power efficiency.

Availability

AK4528VM is available at Aetrix Electronics and suitable for professional audio interfaces, digital mixing consoles, studio monitor controllers, and high-end DAC add-on boards requiring stable component supply and long-term industrial temperature support (−40°C to +85°C).

Supply support for AK4528VM 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 (AKM) is a Japanese semiconductor company specializing in high-precision analog and mixed-signal ICs for audio, sensor, and power applications.

The AK4528VM belongs to AKM's professional audio CODEC product line, designed specifically for studio-grade 24-bit/96kHz recording and playback systems where dynamic range, low distortion, and differential signal integrity are critical.

FAQ

What is the maximum supported sampling rate for AK4528VM?

The AK4528VM supports sampling rates up to 96kHz in normal-speed mode and up to 192kHz in double-speed mode (DFS = "1"). At 96kHz, it achieves 108dB ADC dynamic range and 110dB DAC dynamic range with verified performance per AKM MS0011-E-03 datasheet. The device requires appropriate MCLK frequencies (e.g., 45.1584MHz for 1024fs at 96kHz) and must be configured via CKS0/CKS1/DFS pins or registers to enable double-speed operation. AK4528VM does not support native 192kHz ADC/DAC conversion without external decimation/interpolation.

Does AK4528VM support I²S interface natively?

Yes, AK4528VM supports I²S natively in both serial and parallel modes. In serial mode, I²S is selected via DIF2:DIF0 = "011" (Mode 3); in parallel mode, it is selected by setting the DIF pin high. The device outputs MSB-first, two's complement data with LRCK polarity L/H and BICK edge-aligned timing per Figure 4 of the datasheet. AK4528VM also supports MSB-justified and LSB-justified formats, making it interoperable with diverse SoCs and DSPs without protocol translation logic.

How does the digital high-pass filter (HPF) function in AK4528VM?

The AK4528VM includes a programmable digital high-pass filter (HPF) in the ADC path with a cutoff frequency of 0.9Hz at 44.1kHz sampling, scaling linearly with fs. It is enabled per channel via HPFL/HPFR bits in Register 03H and can be disabled independently for left or right channels. The HPF removes DC offset introduced by microphone preamps or coupling capacitors without affecting audio band integrity. Unlike analog HPFs, it introduces no phase shift below 20Hz and requires no external components - a key advantage in compact, high-density audio PCB layouts.

What is the purpose of the VCOM pin on AK4528VM?

The VCOM pin on AK4528VM outputs a stable VA/2 reference voltage used as the common-mode bias for both the differential ADC inputs (AINL±/AINR±) and DAC outputs (AOUTL±/AOUTR±). This ensures optimal headroom and common-mode rejection in fully differential signal paths. VCOM must be decoupled with a 0.1μF capacitor to AGND and should not be loaded beyond 100μA. Its stability directly impacts THD+N performance; deviation from VA/2 causes gain mismatch and increased even-order harmonics in the AK4528VM signal chain.

Can AK4528VM operate with separate 3.3V and 5V supplies?

Yes, AK4528VM supports mixed-supply operation: VA and VD require 4.75–5.25V for analog and digital cores, while VT (output buffer supply) accepts 2.7–5.25V - enabling direct connection to a 3.3V rail. The 3V I/O pin (VD) allows interfacing with 3.3V logic without level shifters. However, VA and VD must be powered simultaneously or VA first; VT sequencing is non-critical. This dual-voltage capability makes AK4528VM compatible with hybrid 5V analog / 3.3V digital systems common in modern audio SoM designs.

AK4528VM Specifications

Product attributes: Attribute value

Manufacturer:: Asahi Kasei Microdevices/AKM

Series:: -

Package/Case:: 28-SSOP (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Audio

Data Interface:: Serial

Resolution (Bits):: 24 b

Number of ADCs / DACs:: 1 / 1

Sigma Delta:: Yes

S/N Ratio, ADCs / DACs (db) Typ:: 94 / 94

Dynamic Range, ADCs / DACs (db) Typ:: 108 / 110

Voltage - Supply, Analog:: 4.75V ~ 5.25V

Voltage - Supply, Digital:: 4.75V ~ 5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SSOP

AK4528VM FAQ

1.How can I place an order for AK4528VM through Aetrix?

Please submit a Request for Quotation (RFQ) for AK4528VM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AK4528VM reliable?

The price and inventory of AK4528VM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AK4528VM is usually 5 days.

3.What payment methods are accepted for AK4528VM?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AK4528VM transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AK4528VM?

AK4528VM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AK4528VM order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AK4528VM?

For technical support, including AK4528VM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AK4528VM requirements.

6.How does Aetrix verify that AK4528VM is sourced from the original manufacturer or authorized distributors?

All AK4528VM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AK4528VM meets industry standards.

7.What is the process for return or replacement of AK4528VM?

All AK4528VM units undergo pre-shipment inspection (PSI). If there is an issue with AK4528VM, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AK4528VM part is unused and in its original packaging.

Return procedure for AK4528VM:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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