akm

# AKM (Asahi Kasei Microdevices) Manufacturer Skill ## Company Overview AKM (Asahi Kasei Microdevices) is a Japanese semiconductor manufacturer specializing in: - **Audio ICs**: High-performance DACs and ADCs for professional and consumer audio - **Magnetic Sensors**: 3-axis magnetometers and electronic compasses - **Hall Effect Sensors**: Position and rotation sensing - **IMUs**: Combined 9-axis sensors with accelerometer, gyroscope, and magnetometer AKM is renowned for their premium audio converters used in high-end audio equipment and their compact magnetic sensors used in smartphones and wearables. --- ## MPN Structure AKM MPNs follow this general structure: ``` [PREFIX][SERIES][VARIANT][-][PACKAGE/OPTIONS] | | | | | | | +-- Package code or options | | +-- Variant/revision letter | +-- Series number (4-5 digits) +-- Always "AK" prefix ``` ### Naming Convention by Product Family ``` Audio ICs: AK4490 EQ - Premium 32-bit DAC AK4493 SEQ - Upgraded premium DAC AK5386 VT - 24-bit ADC AK4796 VQ - Audio DAC Magnetic Sensors: AK8963 C - 3-axis electronic compass AK8975 A - 3-axis compass AK09918 - 3-axis compass, newer series 9-axis IMUs: AK09911 C - 9-axis sensor (accel+gyro+compass) AK09912 - 9-axis with improved gyroscope AK09913 - 9-axis combined sensor ``` --- ## Product Families ### Audio DACs (AK47xx, AK44xx) | Series | Description | Bits | Channels | Notes | |--------|-------------|------|----------|-------| | AK4490 | Premium DAC | 32-bit | 2 | Flagship, VELVET SOUND | | AK4493 | Premium DAC | 32-bit | 2 | Successor to AK4490 | | AK4495 | Premium DAC | 32-bit | 2 | Enhanced performance | | AK4497 | Reference DAC | 32-bit | 2 | Top of line | | AK4796 | General DAC | 24-bit | 2 | Cost-effective | ### Audio ADCs (AK44xx, AK53xx) | Series | Description | Bits | Channels | Notes | |--------|-------------|------|----------|-------| | AK4490 | High-perf ADC | 24-bit | 2 | Multi-bit delta-sigma | | AK5386 | Stereo ADC | 24-bit | 2 | Professional audio | ### Magnetic Sensors / Electronic Compasses (AK89xx, AK099xx) | Series | Description | Interface | Resolution | Notes | |--------|-------------|-----------|------------|-------| | AK8963 | 3-axis compass | I2C/SPI | 14/16-bit | Widely used, smartphones | | AK8975 | 3-axis compass | I2C | 13-bit | Older series | | AK09911 | 9-axis IMU | I2C | 16-bit | With accelerometer | | AK09912 | 9-axis IMU | I2C | 16-bit | With gyroscope | | AK09913 | 9-axis IMU | I2C | 16-bit | Combined sensor | | AK09918 | 3-axis compass | I2C | 16-bit | Newer, high precision | | AK09940 | 3-axis compass | I2C/SPI | 18-bit | High precision | ### High Precision Magnetic Sensors (AK099xx) | Series | Description | Notes | |--------|-------------|-------| | AK09970 | Linear position sensor | Hall effect | | AK09973 | Switch sensor | Omnipolar | | AK09911-AK09916 | Hall sensors | Various applications | --- ## Package Codes Package codes appear as suffixes, typically separated or as trailing letters: | Code | Package | Size | Notes | |------|---------|------|-------| | TR | LGA | 1.6x1.6mm | Tape and reel, common for sensors | | CS | CSP | Small | Chip-scale package | | WL | WLCSP | Tiny | Wafer-level CSP | | TS | TSSOP | - | Thin shrink small outline | | QFN | QFN | Various | Quad flat no-lead | | BGA | BGA | Various | Ball grid array | | EQ | QFN | 5x5mm | Audio DAC package | | VT | TQFP | 7x7mm | Audio ADC package | | VQ | QFP | - | Standard quad flat | | SEQ | QFN | - | Enhanced QFN variant | ### Package Extraction Logic ```java // From AKMHandler.extractPackageCode(): // Split on hyphen, take suffix from main part String[] parts = mpn.split("-"); String mainPart = parts[0]; String suffix = mainPart.replaceAll("^[A-Z0-9]+", ""); // Map known suffixes switch (suffix) { case "TR" -> "LGA"; case "CS" -> "CSP"; case "WL" -> "WLCSP"; case "TS" -> "TSSOP"; case "QFN" -> "QFN"; case "BGA" -> "BGA"; default -> suffix; // Return as-is } ``` --- ## Series Extraction Rules The handler uses different extraction lengths based on product family: | Family | Prefix | Series Length | Example | |--------|--------|---------------|---------| | Audio ICs | AK4, AK5 | 5 characters | AK4490, AK5386 | | Sensors | AK8, AK09 | 6 characters | AK8963C, AK09918 | ### Series Extraction Logic ```java // From AKMHandler.extractSeries(): boolean isAudioIC = mpn.startsWith("AK4") || mpn.startsWith("AK5"); int maxLength = isAudioIC ? 5 : 6; // Extract up to maxLength alphanumeric characters // AK4490EQ -> AK449 (audio IC, 5 chars) // AK8963C -> AK8963 (sensor, 6 chars) // AK09918 -> AK0991 (sensor, 6 chars) ``` --- ## Interface Detection For magnetic sensors, interface type can be extracted from the MPN: | Suffix/Indicator | Interface | Notes | |------------------|-----------|-------| | Ends with "I" | I2C | I2C interface | | Ends with "S" | SPI | SPI interface | | Contains "I2C" | I2C | Explicit in name | | Contains "SPI" | SPI | Explicit in name | ### Resolution Detection For sensors, resolution may be indicated in the MPN: | Indicator | Resolution | Notes | |-----------|------------|-------| | Contains "14BIT" | 14-bit | Lower resolution mode | | Contains "16BIT" | 16-bit | Standard resolution | --- ## Supported Component Types From `AKMHandler.getSupportedTypes()`: | ComponentType | Description | Pattern Examples | |---------------|-------------|------------------| | SENSOR | General sensors, IMUs | AK09[0-9].*, AK0991[0-9].* | | MAGNETOMETER | Magnetic sensors, compasses | AK89[0-9].*, AK099.*, AK8963.*, AK8975.*, AK09918.* | | IC | Audio DACs and ADCs | AK449[0-9].*, AK479[0-9].*, AK4490.*, AK5386.* | **Note**: The handler has commented-out types (HALL_SENSOR, ADC, DAC) that may not exist in the ComponentType enum. --- ## Pattern Registry Patterns registered in `AKMHandler.initializePatterns()`: ### Magnetometer Patterns ```java // 3-axis magnetic sensors "^AK89[0-9].*" // AK8963, AK8975 series "^AK099.*" // AK099xx high precision "^AK8963.*" // Electronic compass "^AK8975.*" // Electronic compass "^AK09918.*" // 3-axis compass ``` ### Sensor/IMU Patterns ```java // 9-axis and Hall sensors "^AK09[0-9].*" // General 9-axis "^AK09911.*" // 9-axis with accelerometer "^AK09912.*" // 9-axis with gyroscope "^AK09913.*" // 9-axis combined "^AK0991[0-9].*" // Hall sensors ``` ### Audio IC Patterns ```java // DACs and ADCs "^AK449[0-9].*" // Audio ADC series "^AK479[0-9].*" // Audio DAC series "^AK4490.*" // Premium DAC "^AK5386.*" // Audio ADC ``` --- ## Official Replacement Logic The `isOfficialReplacement()` method checks compatibility based on: ### For Sensors (AK8x, AK09x) 1. Same series 2. Same resolution (14-bit vs 16-bit) 3. Compatible interface (I2C/SPI or unspecified) ### For Audio ICs (AK4x, AK5x) 1. Same series 2. Same sample rate (48/96/192 kHz) --- ## Example MPNs with Explanations ### Audio DACs ``` AK4490EQ | | || | | |+-- Package: QFN (5x5mm) | | +--- E: Enhanced variant | +------ 4490: Premium 32-bit DAC +--------- AK: AKM prefix AK4493SEQ | | | | | | | +-- Package: QFN | | +---- S: Super variant | +------- 4493: Successor to AK4490 +---------- AK: AKM prefix AK5386VT | | || | | |+-- Package: TQFP (7x7mm) | | +--- V: Voltage variant | +------ 5386: 24-bit stereo ADC +--------- AK: AKM prefix ``` ### Magnetic Sensors ``` AK8963C | | | | | +--- C: Revision C | +------ 8963: 3-axis electronic compass +--------- AK: AKM prefix AK09918 | | | +------ 09918: Latest 3-axis compass +--------- AK: AKM prefix AK09911C | | | | | +-- C: Revision | +------ 09911: 9-axis IMU with accelerometer +--------- AK: AKM prefix ``` ### Hall Effect Sensors ``` AK09915 | | | +------ 09915: Hall effect sensor +--------- AK: AKM prefix AK09970D | | | | | +-- D: Grade/variant | +------ 09970: Linear position sensor +--------- AK: AKM prefix ``` --- ## Related Files - Handler: `manufacturers/AKMHandler.java` - Component types: `SENSOR`, `MAGNETOMETER`, `IC` - Pattern registry: `PatternRegistry.java` --- ## Learnings & Quirks ### Handler Implementation - **getSupportedTypes() uses HashSet**: Should be migrated to `Set.of()` for immutability (known technical debt) - **IC type needed**: Audio IC patterns are registered under `ComponentType.IC`, so IC must be in getSupportedTypes() for matches to work correctly - **Commented-out types**: HALL_SENSOR, ADC, DAC types are commented out in getSupportedTypes() - may indicate missing ComponentType definitions ### Pattern Overlap