AK4493SEQ Part Audit

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I’ll audit the part metadata, source the official AK4493SEQ datasheet if needed, update the Datasheet property, then compare the symbol, footprint, and pin descriptions and document any mismatches.

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The part project stores its 48 pins as terminal objects, so I’m paging through the complete terminal set and footprint geometry rather than relying on a normal single-component view.
Created a project doc

AK4493SEQ Part Audit

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Reviewed all available part metadata, the 48-terminal schematic symbol, PCB footprint/pads, 3D-model linkage, and the existing official data...

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Audit complete. The official AKM datasheet URL was already set, so no property update was needed; the 48-pin symbol mapping and LQFP footprint are consistent with the datasheet.
Key issues: all pins lack descriptions and use Pin Type: Unspecified, the explicit package property is missing, and the 125 dB description should clarify it applies at 2.7 Vrms. Full findings are in AK4493SEQ Part Audit.
Fix metadata and verify
Populate pin metadata
Add package property
Refine description
Run part review
BICK/DCLK/BCK
Pin Number
3
VREFLR_2
Pin Number
22
VREFHR_2
Pin Number
20
DEM0
Pin Number
15
VSSL_2
Pin Number
32
NC_2
Pin Number
37
DVSS
Pin Number
47
TESTE
Pin Number
18
TVDD
Pin Number
48
AOUTRN
Pin Number
26
AVDD
Pin Number
44
SMUTE/CSN
Pin Number
7
ACKS/CAD1
Pin Number
17
NC_3
Pin Number
43
PSN
Pin Number
13
DVDD
Pin Number
1
DIF1/DZFR
Pin Number
11
VCMR
Pin Number
23
VDDR_2
Pin Number
28
SDATA/DSDL/DINL
Pin Number
4
LRCK/DSDR/DINR
Pin Number
5
VREFHL_1
Pin Number
41
VDDL_2
Pin Number
34
SD/CCLK/SCL
Pin Number
8
NC_1
Pin Number
24
PDN
Pin Number
2
VREFHL_2
Pin Number
42
MCLK
Pin Number
46
DIF2/CAD0
Pin Number
12
VSSR_1
Pin Number
29
DIF0/DZFL
Pin Number
10
AOUTRP
Pin Number
25
VDDR_1
Pin Number
27
VREFLL_1
Pin Number
39
I2C/INV
Pin Number
14
AOUTLP
Pin Number
36
VREFHR_1
Pin Number
19
VSSR_2
Pin Number
30
VCML
Pin Number
38
VREFLR_1
Pin Number
21
SLOW/CDTI/SDA
Pin Number
9
VDDL_1
Pin Number
33
AOUTLN
Pin Number
35
VSSL_1
Pin Number
31
VREFLL_2
Pin Number
40
LDOE
Pin Number
16
AVSS
Pin Number
45
SSLOW/WCK
Pin Number
6

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AK4493SEQ Part Audit
Audit scope
Reviewed all available part metadata, the 48-terminal schematic symbol, PCB footprint/pads, 3D-model linkage, and the existing official datasheet against AKM document 211100143-E-02.
Part metadata

Table

FieldCurrent valueDatasheet cross-checkResult
MPNAK4493SEQAK4493SEQMatch
ManufacturerAsahi Kasei MicrodevicesAsahi Kasei Microdevices / AKMMatch
Part typeIntegrated CircuitStereo premium audio DACAcceptable but generic
Designator prefixICIC is appropriateMatch
Pin count4848-pin deviceMatch
Package propertyNo explicit Package or Case Code property48-pin LQFP, 7 x 7 mm body, 0.50 mm pitchMissing metadata
Footprint assetQFP50P900X900X160-48N.kicad_mod48-LQFP; 7 x 7 mm body, 9 x 9 mm lead span, 0.50 mm pitch, 1.60 mm max heightFilename and geometry are consistent
Datasheet URLAKM-hosted URL already presentOfficial AKM datasheetMatch; no update required
LicenseCC BY 4.0 URLProject metadata, not a device specificationPresent
Symbol styleparametric-v1N/APresent
Project description“Audio D/A Converter ICs Premium DAC Gen3+ 32bit 768kHz 125dB 2ch DSD SCDF”32-bit, 768 kHz PCM, DSD512, 2 channels; S/N depends on output conditionMostly correct; 125 dB needs qualification
Key specifications
  • Stereo, differential-output, premium audio DAC with VELVETSOUND technology.
  • 32-bit PCM input, up to 768 kHz sampling.
  • DSD support up to DSD512; EXDF mode is also supported.
  • S/N: 123 dB at 2 Vrms, 125 dB at 2.7 Vrms, and 128 dB in specified mono-mode conditions.
  • THD+N: -115 dB at 2 Vrms; -110 dB at 2.7 Vrms.
  • Analog channel supplies VDDL/VDDR: 4.75 to 5.25 V.
  • AVDD and TVDD: 3.0 to 3.6 V when the internal LDO is enabled; datasheet conditions vary when LDOE is low.
  • DVDD: 1.7 to 1.98 V input when LDOE is low, or internal LDO output when LDOE is high.
  • Operating temperature: -40 to +85 °C.
  • Package: 48-pin LQFP, 7 x 7 mm body, 9 x 9 mm overall lead span, 0.50 mm pitch, 1.60 mm maximum height.
  • Production status in the reviewed product information: MP; Pb-free, halogen-free, MSL2.
Symbol and pinout cross-check
All 48 pin numbers map to the correct datasheet functions and occur in the correct physical sequence around the package. Multiplexed pin names are represented correctly for PCM, DSD, EXDF, pin-control, SPI-like register control, and I2C modes.
Naming observations
  • Pin 14 is named I2C/INV in the symbol, while the datasheet commonly presents INV/I2C. This is a cosmetic ordering difference, not a connectivity error.
  • Repeated physical pins are made unique with suffixes such as VREFHR_1 and VREFHR_2. This is appropriate for tool uniqueness, although the datasheet uses the same base pin name for both pins.
  • NC pins use NC_1, NC_2, and NC_3; their numbers correctly map to pins 24, 37, and 43.
Pin metadata mismatch
All terminals currently have Pin Type: Unspecified, and no datasheet-derived Pin Description properties were found. This is the largest symbol-quality gap.
Recommended electrical classifications:
  • Inputs: PDN, BICK/DCLK/BCK, SDATA/DSDL/DINL, LRCK/DSDR/DINR, SSLOW/WCK, SMUTE/CSN, SD/CCLK/SCL, DIF2/CAD0, PSN, I2C/INV, DEM0, LDOE, ACKS/CAD1, TESTE, VREFHR/LR/HL/LL pins, MCLK.
  • Bidirectional or mode-dependent: SLOW/CDTI/SDA, DIF0/DZFL, DIF1/DZFR.
  • Outputs: AOUTRP, AOUTRN, AOUTLN, AOUTLP; DVDD is mode-dependent power input/LDO output.
  • Power: DVDD, VDDR pins, VDDL pins, AVDD, TVDD.
  • Ground: VSSR pins, VSSL pins, AVSS, DVSS.
  • Passive / special: VCMR, VCML, and NC pins.
Important descriptions currently absent from the symbol include:
  • PDN must assert reset during power-up.
  • DVDD changes between a 1.8 V input and internal LDO output depending on LDOE; when it is an output, only the specified capacitor may be connected.
  • VCMR and VCML require 10 uF capacitors to the corresponding low-reference pins and must not drive other loads.
  • NC pins are not internally bonded but the datasheet instructs connection to GND.
  • TESTE has an internal pull-down; PSN and LDOE have internal pull-ups; DIF0/DZFL and DIF1/DZFR have mode-dependent pull-down/output behavior.
  • All other digital inputs must not be left floating.
Footprint cross-check
The footprint has 48 pads and uses the expected standard LQFP numbering sequence:
  • Pins 1-12 on the left side from top to bottom.
  • Pins 13-24 on the bottom from left to right.
  • Pins 25-36 on the right from bottom to top.
  • Pins 37-48 on the top from right to left.
Observed geometry is consistent with the package:
  • 0.50 mm pad pitch.
  • Pad centers approximately 4.238 mm from package center, consistent with a 9 mm overall lead span.
  • Rectangular copper pads approximately 0.30 x 1.475 mm.
  • Footprint filename identifies a 0.50 mm pitch, 9 x 9 mm overall, 1.60 mm high, 48-pin QFP.
No pad-count, pitch, side-order, or pin-to-pad mapping mismatch was found. The datasheet provides component lead dimensions rather than a clearly authoritative recommended PCB land pattern in the extracted material, so the exact 0.30 x 1.475 mm land dimensions should be treated as an IPC-style footprint implementation rather than directly datasheet-specified geometry.
3D model
The AK4493SEQ.stp model is linked at the footprint origin with unit scale and no rotation. No metadata evidence indicates a model offset or rotation mismatch. Visual/mechanical dimensional validation of the STEP body was not available from the indexed numerical model properties.
Significant
  1. Missing pin descriptions: all 48 terminals should receive concise datasheet-derived Pin Description metadata.
  2. Unspecified pin electrical types: every terminal is currently Unspecified, reducing ERC usefulness and hiding input/output/power behavior.
  3. Missing explicit package property: add Package or Case Code = 48-LQFP (7x7), 0.50 mm pitch or the closest accepted canonical form.
Minor
  1. Description qualification: “125dB” is only true under the 2.7 Vrms S/N condition; the standard 2 Vrms figure is 123 dB. The description should state the condition or use “up to 125 dB stereo S/N.”
  2. Pin 14 label ordering: I2C/INV versus datasheet INV/I2C is cosmetic only.
  3. Part type is broad: “Integrated Circuit” is valid but “Audio DAC” would improve search/BOM clarity if supported by the property taxonomy.
Overall assessment
The core identity, official datasheet link, pin count, pin numbering, multiplexed pin names, footprint pitch, package envelope, and symbol-to-pad mapping are correct. The part is electrically usable, but its metadata quality is incomplete: pin descriptions and electrical types should be populated before relying on ERC or automated design review, and the package should be explicitly recorded as a property.

  • Audit scope

  • Part metadata

  • Key specifications

  • Symbol and pinout cross-check

  • Naming observations

  • Pin metadata mismatch

  • Footprint cross-check

  • 3D model

  • Mismatches and recommended corrections

  • Significant

  • Minor

  • Overall assessment

Documents

Assets

AK4493SEQ

AK4493SEQ

AK4493SEQ.stp3D Model
svg

AK4493SEQ

AK4493SEQ Symbol.svgDefault
kicad_mod

AK4493SEQ

QFP50P900X900X160-48N.kicad_modFootprint
AK4493SEQ-thumb.png

AK4493SEQ-thumb.png

AK4493SEQ-thumbThumbnail

AK4493SEQ

AK4493SEQ thumbnail
Audio D/A Converter ICs Premium DAC Gen3+ 32bit 768kHz 125dB 2ch DSD SCDF
Audio digital-to-analog converter (DAC) that converts PCM and DSD digital audio data into high-performance analog output signals using a 32-bit architecture. It supports PCM input up to 768 kHz and DSD input up to 22.4 MHz (DSD512), features an I²S/TDM serial audio interface, operates from 3.0–3.6 V analog and digital supplies with a 1.7–1.98 V logic supply, and is housed in a 48-pin LQFP package.
#AudioDAC #DAC #32BitDAC #PCM #DSD #I2S #TDM #AKM #AK4493SEQ #LQFP48

Properties

AK4493SEQ

Asahi Kasei Microdevices

Integrated Circuit

info2.akm.com/NTY4LUFQSi0yNTUAAAGIKypGfocQFOnegEJYsrVIex-YBlHLm3GLtyIKKfwqo7Ul6QoYTQp5_r0JA_JYYGJWnu6VszM=

IC

parametric-v1

creativecommons.org/licenses/by/4.0/

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