WT2000A3-42N Professional Recording Chip
24‑Bit ADC/DAC with 105dB SNR, Dual‑Core DSP, Bluetooth 6.0, and Multi‑Media Storage
The WT2000A3-42N is a professional recording chip designed for high‑end audio capture applications. Featuring 24‑bit high‑precision ADC with 105dB SNR and ‑77dB THD+N, it delivers studio‑grade audio quality. Powered by a 32‑bit dual‑core DSP running at 160MHz, it supports dual‑MIC environmental noise cancellation (ENC), Bluetooth 6.0 for real‑time audio streaming, and multi‑media storage (TF card, SPI‑Flash, USB drive). With flexible UART/SPI control, timestamped file naming, and multiple recording modes, it is ideal for voice recorders, conference systems, and recording badges.
- 24‑bit ADC/DAC – 105dB SNR, ‑77dB THD+N
- 32‑bit dual‑core DSP – 160MHz processing power
- Bluetooth 6.0 – record, transmit, and store simultaneously
- Multi‑media storage – TF (128GB), SPI‑Flash (256Mbit), USB (128GB)
- Dual‑MIC ENC – environmental noise cancellation
WT2000A3-42N Key Features
Technical Specifications
| Parameter | Value / Condition |
|---|---|
| Operating Voltage | 2.2V – 4.5V |
| DSP Core | 32‑bit dual‑core, max 160MHz |
| Crystal Oscillator | 24MHz |
| DAC Resolution | 24‑bit, dual‑channel |
| DAC SNR | ≥ 105dB (A‑weighted) |
| DAC THD+N | ‑77dB (differential) |
| ADC Resolution | 24‑bit, dual‑channel |
| ADC SNR | ≥ 95dB (A‑weighted) |
| ADC THD+N | ‑75dB @ 0dB gain |
| DAC Sample Rates | 8, 11.025, 16, 22.05, 24, 32, 44.1, 48, 64, 88.2, 96 kHz |
| ADC Sample Rates | 8, 11.025, 16, 22.05, 24, 32, 44.1, 48 kHz |
| Audio Playback Formats | MP2, MP3, WMA, APE, FLAC, AAC, M4A, WAV, OPUS |
| Recording Formats | OPUS (default) / MP3 (selectable) |
| Storage Media | TF (128GB), SPI‑Flash (256Mbit), USB (128GB) |
| Bluetooth | 6.0 with real‑time streaming |
| UART Baud Rate | 115200 (configurable) |
| Recording Power | < 5mA (no storage/BT, ENC off) |
| Package | QFN42 (4×5mm) |
| Operating Temperature | ‑40°C ~ +85°C |
Recording Modes
Bluetooth ON
- Mode A (Default): Record + Bluetooth transmit + Store
- Mode B: Record + Store only (Bluetooth off via command)
Bluetooth OFF
- Mode C: Record + Store only (no data output)
- Mode D: Record + Store + UART data output
Storage priority: USB drive > TF card > SPI‑Flash. If no storage is present, recording continues without storage (Bluetooth or UART output only).
File Management
Auto‑Naming & Splitting
- Files named by date/time:
YYYYMMDDHHMM - Custom prefix supported via command
- New file created every hour automatically
- Example: 13:20 start → 13:20–14:00 saved, then 14:00–15:00, etc.
File Operations
- Delete individual files by name
- Delete all files older than a specified date/time
- Format entire storage media
- Query remaining storage capacity
Key Pin Functions (QFN42)
| Pin | Name | Function |
|---|---|---|
| 2 | DC_SW | Internal buck converter – external inductor |
| 3 | VCC42 | Power input (max 4.5V) |
| 5 | VOUT | LDO output – 1µF cap to ground |
| 7 | RX1 | UART receive (MCU communication) |
| 8 | TX1 | UART transmit (MCU communication) |
| 10 | BUSY | Playback status indicator |
| 11 | ADKEY | AD key input |
| 12 | ANT | Bluetooth antenna |
| 13 | XIN | 24MHz crystal input |
| 14 | XOUT | 24MHz crystal output |
| 18 | SPI_CS | SPI‑Flash chip select |
| 19 | SPI_DO | SPI‑Flash data out |
| 20 | SPI_CLK | SPI‑Flash clock |
| 22 | D- | USB DM |
| 23 | D+ | USB DP |
| 27 | RX2 | UART receive 2 |
| 28 | TX2 | UART transmit 2 |
| 30 | MIC2+ | MIC2+ / differential MIC1‑ |
| 31 | MIC1+ | MIC1+ / differential MIC1+ |
| 35 | DACL | Left channel audio output |
| 40 | SD_CLK | SD card clock |
| 41 | SD_CMD | SD card command |
| 42 | SD_DAT | SD card data |
Application Scenarios
Why Choose WT2000A3-42N
Frequently Asked Questions
What is the WT2000A3-42N?
WT2000A3-42N is a professional recording chip with 24-bit ADC/DAC, 32-bit dual-core DSP (160MHz), Bluetooth 6.0, and support for TF card, SPI-Flash, and USB storage. It features dual-MIC ENC noise cancellation and real-time UART data output.
What is the audio quality of the ADC and DAC?
The dual-channel 24-bit DAC achieves 105dB SNR and -77dB THD+N. The dual-channel 24-bit ADC achieves 95dB SNR, delivering studio-grade audio quality.
What storage media does it support?
WT2000A3-42N supports TF card (up to 128GB), SPI-Flash (up to 256Mbit), and USB drive (up to 128GB). Priority: USB > TF card > SPI-Flash. Formats: FAT, FAT32, or EXFAT.
Does it support Bluetooth?
Yes. WT2000A3-42N features integrated Bluetooth 6.0 for real-time audio streaming during recording (record, transmit, and store simultaneously).
What are the recording modes?
With Bluetooth on: (a) Record + transmit + store (default). (b) Record + store only. With Bluetooth off: (c) Record + store only. (d) Record + store + UART output. Recording can be triggered by AD key or UART commands.
How are recording files organized?
Files are automatically named by date and time (YYYYMMDDHHMM). A new file is created every hour. Users can also customize file naming via UART commands.
What audio formats and sample rates are supported?
Recording: OPUS (default) or MP3. Playback: MP2, MP3, WMA, APE, FLAC, AAC, M4A, WAV, OPUS. ADC sample rates: 8–48kHz. DAC sample rates: 8–96kHz.
Can I delete or format recording files via commands?
Yes. You can delete individual files, format the storage, or delete files older than a specified date/time via UART commands.
What is the power consumption during recording?
Recording power consumption is under 5mA (excluding storage and Bluetooth transmission, with noise cancellation off). Standby mode features ultra-low power consumption.
What are the typical applications?
Voice recorders, conference systems, recording badges, smart home voice recording, interview recorders, and any professional audio capture device requiring high-quality recording and real-time data transfer.
Important: The chip requires a 24MHz crystal oscillator. VCC42 must not exceed 4.5V. The bottom pad (E-GND/PIN0) must be grounded. For Bluetooth functionality, design the antenna circuit accordingly. If Bluetooth is not used, the antenna circuit can be omitted. Storage priority: USB > TF card > SPI-Flash. Recording file naming uses a 24‑hour time format.
