AKM
AK5703EN - 24-Bit 4-Channel Audio ADC | Asahi Kasei AKM
MPN: AK5703EN ✓ Active
1.6 V to 3.6 V Vdss
28-QFN, 4 x 4 mm Package
48 kHz Speed
MOQ: 1 |
AK5703EN Overview
The Asahi Kasei Microdevices/AKM AK5703EN is a low-power 24-bit, four-channel audio ADC with an integrated PLL, programmable microphone amplifiers, and ALC, supplied in a 28-QFN 4x4 mm package. It supports I2S and I2C interfaces, operates at a maximum sampling frequency of 48 kHz, and accepts a 2.4 V to 3.6 V analog supply range with a 1.6 V to 3.6 V digital supply range.
An audio ADC is a mixed-signal data converter that accepts analog microphone or line-level signals and converts them into high-resolution digital samples for processing by a host processor. The AK5703EN belongs to the audio ADC hierarchy within data converters, interface ICs, and mixed-signal semiconductors. Its four-channel architecture allows one converter to handle several microphone or stereo audio inputs while sharing a common digital audio interface.
The device combines 24-bit conversion, programmable microphone amplification, ALC, and PLL functions in one compact package. The microphone amplifiers provide adjustable analog gain for different source levels, while automatic level control helps maintain a suitable signal amplitude and improve usable dynamic range. The integrated PLL provides a clock-related function for digital audio data conversion and supports flexible system clocking. Low-power operation makes the converter suitable for compact audio capture equipment where energy use and board area are important.
The AK5703EN supports both I2S and I2C digital interfaces, allowing it to connect to digital audio processors, application processors, or audio-oriented microcontrollers. Its 28-QFN 4x4 mm package supports dense PCB layouts but requires careful thermal-pad connection and short signal routing. The exposed pad provides the primary thermal and electrical land beneath the device, while analog input, digital interface, clock, power, and ground pins must be assigned according to the manufacturer pin-description table.
Typical applications include USB microphones, voice-recording products, conference equipment, headset interfaces, soundbars, audio conferencing terminals, and embedded voice-capture systems. Four input channels are useful for small stereo or multi-microphone arrangements, while the integrated microphone amplifiers and ALC reduce the need for separate analog conditioning components.
When designing a board around the AK5703EN, place input and decoupling capacitors close to their associated pins and keep microphone traces short and away from switching nodes. Confirm interface voltage levels, clock configuration, and register settings in the manufacturer datasheet. Treat the exposed pad as a thermal path and connect it to the intended ground-plane area according to the package drawing.
This product page organizes the AK5703EN specifications, verified source links, interface and application guidance, engineering design notes, and available drop-in comparison information into one implementation-focused reference for hardware and sourcing engineers.
An audio ADC is a mixed-signal data converter that accepts analog microphone or line-level signals and converts them into high-resolution digital samples for processing by a host processor. The AK5703EN belongs to the audio ADC hierarchy within data converters, interface ICs, and mixed-signal semiconductors. Its four-channel architecture allows one converter to handle several microphone or stereo audio inputs while sharing a common digital audio interface.
The device combines 24-bit conversion, programmable microphone amplification, ALC, and PLL functions in one compact package. The microphone amplifiers provide adjustable analog gain for different source levels, while automatic level control helps maintain a suitable signal amplitude and improve usable dynamic range. The integrated PLL provides a clock-related function for digital audio data conversion and supports flexible system clocking. Low-power operation makes the converter suitable for compact audio capture equipment where energy use and board area are important.
The AK5703EN supports both I2S and I2C digital interfaces, allowing it to connect to digital audio processors, application processors, or audio-oriented microcontrollers. Its 28-QFN 4x4 mm package supports dense PCB layouts but requires careful thermal-pad connection and short signal routing. The exposed pad provides the primary thermal and electrical land beneath the device, while analog input, digital interface, clock, power, and ground pins must be assigned according to the manufacturer pin-description table.
Typical applications include USB microphones, voice-recording products, conference equipment, headset interfaces, soundbars, audio conferencing terminals, and embedded voice-capture systems. Four input channels are useful for small stereo or multi-microphone arrangements, while the integrated microphone amplifiers and ALC reduce the need for separate analog conditioning components.
When designing a board around the AK5703EN, place input and decoupling capacitors close to their associated pins and keep microphone traces short and away from switching nodes. Confirm interface voltage levels, clock configuration, and register settings in the manufacturer datasheet. Treat the exposed pad as a thermal path and connect it to the intended ground-plane area according to the package drawing.
This product page organizes the AK5703EN specifications, verified source links, interface and application guidance, engineering design notes, and available drop-in comparison information into one implementation-focused reference for hardware and sourcing engineers.
Drop-in alternatives for AK5703EN — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AK5703EN (same form factor and footprint) — differing in Digital Audio Interface, Package.
AKM (Asahi Kasei Microdevices)
Digital Audio Interface: I2S
Package: 28-pin QFN, 4 mm x 4 mm
Compare with AK5703EN →
AK5704EN
✅ Drop-InAKM (Asahi Kasei Microdevices)
📦 28-QFN, 4 x 4 mm
32 bit · 4 channels · 192 kHz · I2S · Yes · 105 dB · Up to 16 channels · Yes
Contact for price
View Datasheet →AK5703EN Maximum Ratings & Electrical Characteristics
| Converter Type | 24-bit audio ADC |
| Number of Input Channels | 4 channels |
| Resolution | 24 bit |
| Maximum Sampling Frequency | 48 kHz |
| Digital Audio Interface | I2S and I2C |
| Integrated Clock Circuit | PLL |
| Microphone Amplifier | Programmable MIC-AMP |
| Automatic Level Control | ALC circuit |
| Power Class | Low-power operation |
| Digital Supply Voltage Range | 1.6 V to 3.6 V |
| Analog Supply Voltage Range | 2.4 V to 3.6 V |
| Package | 28-QFN, 4 x 4 mm |
| Pin Count | 28 pins |
| Mounting Type | Surface mount |
| Application Category | Audio ADC, ADCs/DACs - Special Purpose |
AK5703EN 28-qfn, 4 x 4 mm Pin Configuration Guide
Pin configuration for AK5703EN (28-qfn, 4 x 4 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for AK5703EN.
Refer to the datasheet for full pin configuration.
Typical Applications
AK5703EN is suitable for 3 applications: Signal Conditioning, Data Acquisition, Audio Processing.
Signal Conditioning
Amplifying and filtering sensor signals using AK5703EN.
Data Acquisition
Converting analog signals for digital processing with AK5703EN.
Audio Processing
Audio signal amplification and processing with AK5703EN.
What is the AK5703EN?
The AK5703EN is a low-power, four-channel, 24-bit audio ADC with an integrated PLL, programmable microphone amplifiers, and automatic level control. According to the manufacturer datasheet, the device supports I2S and I2C digital audio interfaces and is packaged in a compact 28-QFN 4 x 4 mm surface-mount package.
What are the key specifications of AK5703EN that engineers should know?
The AK5703EN provides four analog input channels, 24-bit conversion, operation up to 48 kHz, I2S and I2C interfaces, programmable microphone amplifiers, ALC, and an integrated PLL. According to the manufacturer datasheet, its digital supply range is 1.6 V to 3.6 V, while the analog supply range is 2.4 V to 3.6 V.
Where can I download the AK5703EN datasheet PDF?
The AK5703EN datasheet PDF is available from the AK5703EN document link on this page. It is the primary reference for register addresses, electrical characteristics, clock requirements, interface timing, pin assignments, and recommended application circuits. Engineers should also use the package drawing when defining the exposed-pad land pattern.
Where can I find the AK5703EN pinout?
Use the manufacturer datasheet pin-description table to locate the AK5703EN pinout because a complete pin-number-to-function list is not reproduced here. The device uses a 28-QFN 4 x 4 mm package with an exposed thermal pad. Assign the analog inputs, digital interface signals, supplies, grounds, clock pins, and exposed pad exactly as directed by the datasheet.
What interface does the AK5703EN use?
The AK5703EN supports both I2S and I2C interfaces. I2S is suitable for conventional digital-audio data transport, while I2C provides a separate control path for configuration and register access. According to the manufacturer datasheet, the selected interface and its clocking behavior must be configured correctly for the host processor and audio stream.
How many channels and bits does the AK5703EN support?
The AK5703EN supports four input channels with 24-bit conversion resolution and a maximum sampling frequency of 48 kHz. These parameters allow it to capture multiple analog audio inputs while maintaining high-resolution digital samples. According to the manufacturer datasheet, the channel and data-path configuration should be verified for the required audio topology.
What supply voltage does the AK5703EN require?
The AK5703EN operates from a 1.6 V to 3.6 V digital supply and a 2.4 V to 3.6 V analog supply. According to the manufacturer datasheet, the analog range differs from the digital range, so both rails must be checked independently during power planning. Adequate decoupling is required close to the supply pins.
Does the AK5703EN include microphone amplifiers and ALC?
Yes, the AK5703EN includes programmable microphone amplifiers and an automatic level control circuit. According to the manufacturer datasheet, the amplifiers provide adjustable gain for microphone inputs, while ALC helps maintain an appropriate signal level and improve dynamic-range utilization. Configuration details must be established through the device control registers.
Is the AK5703EN suitable for USB microphone and headset designs?
The AK5703EN is suitable for USB microphones, headset interfaces, and compact voice-capture products because it combines four 24-bit ADC channels, programmable microphone gain, ALC, PLL, and both I2S and I2C interfaces in one 28-QFN package. Its low-power design also suits portable equipment where board area and energy use are constrained.
When should I choose the AK5703EN over another audio ADC?
Choose the AK5703EN when a design requires four 24-bit ADC channels together with integrated microphone amplifiers, ALC, a PLL, and flexible I2S or I2C connectivity. Its 48 kHz maximum rate targets conventional voice and stereo audio capture. Confirm whether the required input topology, clocking method, and supply rails satisfy the manufacturer specification before committing to the design.
What can replace the AK5703EN?
The closest identified family candidate is the AK5704EN, which is available for specification comparison and uses the same manufacturer. A replacement should be accepted only after its 28-QFN footprint, pin assignments, supply requirements, sampling-rate support, microphone-amplifier behavior, ALC implementation, and digital interface configuration have been checked against the AK5703EN datasheet.
Is the AK5703EN the same as the AK5704EN?
The AK5703EN and AK5704EN are related AKM audio ADC models, but they should not be treated as automatically identical. The AK5703EN supports up to 48 kHz, while the AK5704EN comparison identifies a broader sampling-rate capability. Check pin compatibility, interface behavior, clock requirements, and register differences in the respective manufacturer datasheets before substitution.
What is the best AKM equivalent for AK5703EN?
The AK5704EN is the relevant same-manufacturer candidate identified for direct specification comparison with the AK5703EN. Its higher sampling-rate capability can benefit designs above 48 kHz, but that difference also means it is not a universally identical substitute. Validate the package, pins, rails, clocking, and control registers before using it as a drop-in replacement.
Where can I buy AK5703EN online and what is its current price?
The AK5703EN can be requested through the Request a Quote form on this page for current commercial availability, price, and lead-time confirmation. Its 28-QFN 4 x 4 mm package and low-power four-channel 24-bit ADC configuration are the principal identifying parameters. The form avoids publishing a stale price or implying unconfirmed stock.
Is AK5703EN in stock and what is its lead time?
Use the Request a Quote form on this page to confirm current AK5703EN inventory, minimum order quantity, packaging, and lead time. The device is identified as an active low-power 24-bit, four-channel audio ADC in a 28-QFN 4 x 4 mm package. Procurement should confirm the exact suffix and shipping form against the requested production quantity.
Engineering reference data for AK5703EN — comparison, design guidance, and compliance information.
Selection Guide
Choose the AK5703EN for compact four-channel, 24-bit voice or stereo capture designs that operate at up to 48 kHz and benefit from integrated programmable microphone amplifiers, ALC, and a PLL. It is particularly useful when the product must support both I2S audio transport and I2C configuration in a small 28-QFN footprint. Choose the AK5704EN instead when the design requires operation up to 96 kHz and its clock, register, and supply requirements have been validated. Treat either device as a drop-in candidate only after confirming pin assignments, exposed-pad layout, digital interface timing, input configuration, and register compatibility against the manufacturer datasheets.
Comparison with Alternatives
| Parameter | This Product | AK5704EN |
|---|---|---|
| Brand | Asahi Kasei Microdevices/AKM | Asahi Kasei Microdevices/AKM |
| Package | 28-QFN, 4 x 4 mm | 28-QFN, 4 x 4 mm |
| Converter Resolution | 24 bit | 24 bit |
| Input Channels | 4 channels | 4 channels |
| Maximum Sampling Frequency | 48 kHz | 96 kHz |
| Digital Interface | I2S and I2C | I2S and I2C |
| Integrated Features | PLL, programmable MIC-AMP, and ALC | PLL, MIC-AMP, and ALC |
| Power Class | Low power | Low power |
Key Differentiators
- Four-channel 24-bit conversion in one compact package (vs AK5704EN)
- Optimized for standard 48 kHz audio conversion (vs AK5704EN)
- Integrated microphone signal conditioning (vs AK5704EN)
Design Notes
Place the analog input components, supply bypass capacitors, and the AK5703EN as a compact analog island. Keep microphone traces short, maintain a continuous ground reference, and avoid routing them beneath digital clock or interface traces. A compact 28-QFN footprint makes short analog connections easier to achieve while reducing susceptibility to noise pickup.
Use the manufacturer pin-description table and package drawing when assigning every signal and the exposed pad. The exposed pad is part of the thermal and layout design, so follow its required connection and land-pattern instructions rather than treating it as an unassigned NC location. Confirm pin numbering against the selected package orientation before releasing artwork.
Plan separate analog and digital rails within the AK5703EN operating limits: 2.4 V to 3.6 V for analog and 1.6 V to 3.6 V for digital. Place the required bypass capacitors close to their supply and ground pins, and decouple any shared supply upstream to prevent microphone-amplifier or digital-interface transients from disturbing the ADC reference environment.
Do not assume that I2S data timing, I2C control timing, microphone gain, and ALC behavior are interchangeable between AK5703EN and AK5704EN. The AK5704EN reaches 96 kHz, twice the AK5703EN maximum of 48 kHz, and may require different clock or register arrangements. Validate the replacement against both datasheets before treating it as a drop-in substitution.
Compliance Information
RoHS
Unknown
REACH
Unknown
AEC-Q100
Unknown
Lead Free
Unknown
Halogen Free
Unknown
Conflict Minerals
Unknown
Compliance declarations were not identified in the referenced product information. Confirm RoHS, REACH, AEC-Q100 qualification, lead-free status, halogen-free status, and conflict-minerals reporting with the manufacturer for the exact ordering code.
Data verified on: 2026-11-05
— data verified and curated by XAIPART's component engineering team
Sources:
Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Distributor, Octopart
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Related Components & Terms
Asahi Kasei Microdevices/AKM
AK5703EN
AK5704EN
audio ADC
analog-to-digital converter
mixed-signal semiconductor
24-bit ADC
four-channel ADC
I2S
I2C
PLL
programmable microphone amplifier
MIC-AMP
automatic level control
ALC
48 kHz sampling
28-QFN
QFN family
surface-mount package
USB microphone
voice-recording equipment
digital audio interface
microphone preamplifier
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