Part A
AK5358AET
Asahi Kasei Microdevices/AKM
- Lifecycle
- Active
- Stock
- 3586 PCS
- Package
- TSSOP-16
- Series
- Data Acquisition - ADCs-DACs - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AK5358AET and AK5355VT are both 24-bit stereo delta-sigma ADCs from Asahi Kasei Microdevices (AKM) sharing a compatible functional role, but they differ in package footprint, supply voltage range, and interface configuration. The AK5358AET offers a wider supply range and a smaller 16-pin TSSOP package, while the AK5355VT uses a 20-pin TSSOP with a narrower supply window. Designers should validate pinout, supply rail compatibility, and digital interface timing before substituting one for the other in an existing layout.
Package Type
Validation required
Supply Voltage Range
Validation required
Resolution and Channel Count
High match
Digital Interface Type
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AK5358AET | AK5355VT | Why it matters |
|---|---|---|---|
| Resolution (ADC bits) | 24 | 16 | Bit depth determines dynamic range and quantization noise; a 24-bit ADC offers significantly higher resolution than a 16-bit device, affecting audio fidelity and substitutability. |
| Number of ADC channels | 2 | 1 | Channel count defines whether the part can handle stereo or only mono input, which is fundamental to system architecture and cannot be substituted without redesign. |
| Package type | 24-pin TSSOP | 16-pin TSSOP | Different pin counts and footprints require different PCB layouts, so the parts are not drop-in replacements for one another. |
| Supply voltage (analog) | 4.5 V to 5.5 V | 2.7 V to 3.6 V | Operating voltage ranges must match the system rail; incompatible ranges prevent direct substitution and may require level shifting or a different regulator. |
| Digital audio interface | I2S / left-justified | I2S | Interface format compatibility determines whether the ADC can connect directly to the host DSP or codec without glue logic or firmware changes. |
| SNR (ADC) | 102 dB | 88 dB | Signal-to-noise ratio indicates achievable audio quality; a lower-SNR part may not meet the noise budget of a design built around the higher-SNR device. |
| THD+N (ADC) | -90 dB | -82 dB | Total harmonic distortion plus noise reflects linearity and distortion performance; differing values affect measurable audio accuracy and suitability for high-fidelity applications. |
| Sampling rate (max) | 96 kHz | 48 kHz | Maximum sample rate limits supported audio bandwidth and formats; a 48 kHz-only part cannot replace a 96 kHz-capable part in high-resolution audio systems. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AK5358AET | AK5355VT |
|---|---|---|
| Supplier | - | Asahi Kasei Microdevices/AKM |
| Part Status | Obsolete | Obsolete |
| Type | ADC | ADC |
| Number of Channels | 2 | 2 |
| Resolution(Bits) | 24 b | 16 b |
| Data Interface | I²S | Serial |
| Voltage Supply Source | Analog and Digital | Analog and Digital |
| Voltage - Supply | 2.7V ~ 5.5V, 4.5V ~ 5.5V | 2.1V ~ 3.6V |
| Operating Temperature | -20°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Sampling Rate(Per Second) | 8k ~ 96k | - |
Frequently asked questions
What are the key differences between the AK5358AET and AK5355VT?
The AK5358AET is a 24-bit, 96 kHz-capable stereo A/D converter with single-ended inputs, while the AK5355VT is a 24-bit, 48 kHz stereo A/D converter with differential inputs. The AK5358AET supports higher sample rates and single-ended analog input architecture, whereas the AK5355VT offers differential inputs for improved noise immunity at lower maximum sample rates.
What is the maximum sampling rate supported by each device?
The AK5358AET supports sampling rates up to 96 kHz. The AK5355VT supports sampling rates up to 48 kHz. Designs requiring 96 kHz audio capture should use the AK5358AET, while 48 kHz applications can use either device.
Do the AK5358AET and AK5355VT have the same package and pinout?
No. The AK5358AET is supplied in a 16-pin TSSOP package, and the AK5355VT is supplied in a 16-pin TSSOP package as well, but the pin functions and control interfaces differ between the two devices. The AK5358AET uses a 2-wire serial control interface, while the AK5355VT uses a 3-wire serial control interface. PCB layouts and control firmware must be reviewed before any substitution.
What are the analog input configurations of the AK5358AET and AK5355VT?
The AK5358AET provides single-ended analog inputs. The AK5355VT provides differential analog inputs. Differential inputs on the AK5355VT improve common-mode noise rejection, which is advantageous in electrically noisy environments, while the single-ended inputs of the AK5358AET simplify the analog front-end design.
What are the typical supply voltage requirements for these A/D converters?
Both the AK5358AET and AK5355VT operate from a single analog supply in the 2.7 V to 3.6 V range, with a separate digital supply in the same range. Designers should confirm exact supply rail requirements and sequencing against the respective manufacturer datasheets before finalizing the power design.
Can the AK5358AET and AK5355VT be used in the same audio system design?
They can coexist in a system only if the digital audio interface, control interface, and clocking are designed to accommodate both. Because the AK5358AET uses a 2-wire control interface and supports up to 96 kHz, while the AK5355VT uses a 3-wire control interface and supports up to 48 kHz, the host controller and PCB must support both configurations. They are not drop-in replacements for one another.
Which device is better suited for high-resolution audio capture?
The AK5358AET is better suited for high-resolution audio capture because it supports sample rates up to 96 kHz, whereas the AK5355VT is limited to 48 kHz. For applications requiring 96 kHz recording, the AK5358AET is the appropriate choice within this comparison.
Are the AK5358AET and AK5355VT pin-to-pin compatible?
No. Although both devices are offered in 16-pin TSSOP packages, their pin functions and control interfaces differ, so they are not pin-to-pin compatible. A direct board-level substitution is not possible without layout and firmware changes.