AK4385VT Equivalent & Substitute Parts

Part Overview

The AK4385VT is a 24-bit, 2-channel digital-to-analog converter (DAC) manufactured by Asahi Kasei Microdevices (AKM) in a 16-TSSOP surface mount package. This component is designed for audio and data acquisition applications requiring high-resolution analog output from digital signals via I2S interface. The AK4385VT is currently classified as obsolete, making identification of functionally compatible substitute parts essential for ongoing design support, production continuity, and system maintenance.

Substiute Parts

AK4385VT

Asahi Kasei Microdevices/AKMIn Stock: 2124AK4385VT Datasheet

Current PartRFQ

AK4432VT

Asahi Kasei Microdevices/AKMIn Stock: 9370AK4432VT Datasheet

MFR RecommendedRFQ

AK4452VN

Asahi Kasei Microdevices/AKMIn Stock: 1449AK4452VN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AK4385VT are identified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

• Manufacturer: Asahi Kasei Microdevices (AKM) — maintains consistent design philosophy and pin compatibility within product families
• Data Interface: I2S — ensures digital signal protocol compatibility
• Number of Channels: 2 — matches dual-channel output requirement
• Mounting Type: Surface Mount — maintains PCB assembly compatibility
• Package Family: 16-TSSOP or compatible footprint — allows direct or minimal layout adaptation

Secondary Considerations:

• Resolution (Bits): 24-bit or higher — ensures equal or superior analog output precision
• Product Status: Active preferred — guarantees ongoing availability and support
• Operating Temperature Range: Minimum -40°C ~ 85°C — maintains thermal operating envelope
• Voltage Supply Compatibility: Digital supply voltage overlap with original specification

The identified substitutes (AK4432VT and AK4452VN) meet these criteria while offering enhanced specifications in resolution, sampling rate, and supply voltage flexibility. Both are active products from AKM with current production status.

Parameter Comparison

Engineering Selection Recommendations

AK4432VT Selection Criteria:

• Maintains 16-TSSOP package footprint — direct PCB layout compatibility without redesign
• Upgrades resolution from 24-bit to 32-bit — provides superior analog output precision
• Supports I2S interface — maintains digital signal protocol compatibility
• Active product status — ensures long-term availability and manufacturing support
• ROHS3 compliant — meets current environmental and regulatory requirements
• Extended operating temperature range (-40°C ~ 105°C) — provides broader thermal margin
• Lower digital supply voltage (3V ~ 3.6V) — may require power supply circuit modification from original 4.75V ~ 5.25V specification

AK4452VN Selection Criteria:

• Upgrades resolution to 32-bit and sampling rate to 768k — supports high-fidelity audio applications
• Adds DSD interface support alongside I2S — enables additional digital audio format compatibility
• Wider supply voltage range (1.7V ~ 5.5V) — accommodates diverse power supply architectures
• Active product status — guarantees ongoing production and support
• ROHS3 compliant — meets environmental standards
• Package change to 32-QFN (5x5) — requires PCB layout redesign and increased board space
• Extended operating temperature range (-40°C ~ 105°C) — provides enhanced thermal performance

Frequently Asked Questions (FAQ)

Q: Can AK4432VT directly replace AK4385VT without PCB modifications? A: Yes. Both components use the 16-TSSOP package with identical footprint dimensions (0.173", 4.40mm width). Pin-to-pin compatibility within the I2S protocol allows direct substitution. However, the AK4432VT requires digital supply voltage of 3V ~ 3.6V versus the AK4385VT's 4.75V ~ 5.25V, necessitating power supply circuit verification.

Q: What are the key differences between AK4432VT and AK4452VN? A: AK4432VT maintains the 16-TSSOP package for direct layout compatibility, while AK4452VN uses a larger 32-QFN (5x5) package requiring PCB redesign. AK4452VN supports higher sampling rates (768k vs. 192k) and adds DSD interface capability. Both offer 32-bit resolution and active product status.

Q: Why is the AK4385VT classified as obsolete? A: Obsolete status indicates the manufacturer has discontinued production. Substitute parts ensure design continuity and system maintenance for existing applications.

Q: Are both substitute parts ROHS3 compliant? A: Yes. Both AK4432VT and AK4452VN are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the impact of different supply voltage ranges? A: AK4385VT operates at 4.75V ~ 5.25V, AK4432VT at 3V ~ 3.6V, and AK4452VN at 1.7V ~ 5.5V. System power supply circuits must be verified to ensure the selected substitute operates within its specified voltage range.

Q: Do all three parts support I2S interface? A: Yes. All three components support I2S digital audio interface. AK4452VN additionally supports DSD format.

Q: What is the moisture sensitivity level for these components? A: All three parts have MSL rating of 2 (1 Year), indicating identical moisture handling and storage requirements.