Drive.A.2
I2C/SPI-input dual 3W Class-D amplifier
The Drive.A.2 is a dual-channel audio output tile combining a DAC63202W 12-bit smart DAC with two TPA2028D1 Class-D audio power amplifiers. It provides two independent audio channels, each capable of delivering up to 3 W into 4 Ω or 880 mW into 8 Ω speakers.
The DAC63202W generates analog waveforms from digital data with 12-bit resolution and supports built-in waveform generation (sine, cosine, triangular, sawtooth) for processor-less tone generation. The DAC connects to a host processor via either I2C (up to 1 Mbps) or SPI (up to 50 MHz), auto-detected at power-on.
Each TPA2028D1 amplifier features I2C-programmable gain control (−28 dB to +30 dB in 1 dB steps), automatic gain control (AGC), and dynamic range compression (DRC) to prevent speaker overdrive and enhance perceived loudness. The amplifiers operate filter-free in Class-D mode for high efficiency and include thermal and short-circuit protection.
The tile operates from a 2.5 V to 5.5 V supply. All three ICs are controlled via a shared I2C bus, while the DAC can alternatively be driven over SPI for higher-bandwidth waveform updates.
Product Info
- Status
- Beta
- In Stock
- 15
- Pricing
Qty Each 1+ $20.00 10+ $18.00 50+ $17.00
Technical Summary
- Package
- T44-10 (PDF)
- Supplies
- 2.5–5.5V
- Interfaces
- I2CSPI
Resources & Links
- Datasheet
- Download PDF
- JSON Tile Definition
- v0.8 (Feb 16, 2026)
- Drivers
- GitHub
- Discussion
- Discord
Application Notes
Automatic Bus Detection
The DAC in the Drive.A.2 tile automatically detects whether it is connected via I2C of SPI.
I2C Addresses
The Drive.A.2 can be configured for one of four I2C addresses by manipulating the connection of pad 3 (A0). Leaving the pad floating (or connecting to V+) uses the default address of 0x49. Connecting pad 3 to GND will change to address 0x48, while connecting to pad 3 to pad 4 (I2C.CLK) or pad 5 (I2C.DAT) will set the address to 0x4B or 0x4A, respectively.
Pad Assignments
| Pad | Type | Function | Note | |
|---|---|---|---|---|
| 1 | ⏻ | GND | ||
| 2 | D | GPIO | an internal 100k pull-up | |
| ↳ | SPI | MISO | ||
| 3 | D | A0 | an internal 100k pull sets the default I2C address to 0x49. | |
| ↳ | SPI | MOSI | ||
| 4 | I2C | CLK | ||
| ↳ | SPI | CS | ||
| 5 | I2C | DAT | ||
| ↳ | SPI | CLK | ||
| 6 | OUT.0- | |||
| 7 | OUT.0+ | |||
| 8 | OUT.1- | |||
| 9 | OUT.1+ | |||
| 10 | ⏻ | V+ | 2.5-5.5V |
I2C
I2C- Mode
- slave
- Max Clock
- 1MHz
- Addresses
- 0x49(default), 0x48, 0x4A, 0x4B
- Format
- —
| Function | Required | Pad(s) |
|---|---|---|
| I2C.CLK | Yes | 4 |
| I2C.DAT | Yes | 5 |
SPI
SPI- Mode
- slave
- Max Clock
- 50MHz
- Address
- —
- Format
- —
| Function | Required | Pad(s) |
|---|---|---|
| SPI.MISO | Yes | 2 |
| SPI.MOSI | Yes | 3 |
| SPI.CLK | Yes | 5 |
| SPI.CS | Yes | 4 |
Development Product — This is an electronic development module intended for evaluation, prototyping, and integration into other designs by qualified engineers and developers. It is not a finished consumer product and has not been independently certified for FCC, CE, UL, or other regulatory compliance. The integrator of this module into a finished product is responsible for obtaining all necessary certifications. Not intended for use in life-support systems, safety-critical applications, or any application where failure could result in personal injury or property damage. See our Terms of Sale for full details.