{ "family": "Drive", "name": "A.2", "rev": "a", "tile_id": 13, "json_version": "0.8", "updated_at": "2026-02-16T06:14:48.558Z", "headline": "I2C/SPI-input dual 3W Class-D amplifier", "description": "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.\n\nThe 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.\n\nEach 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.\n\nThe 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.", "application_notes": [ { "sort": 0, "details": "The DAC in the Drive.A.2 tile automatically detects whether it is connected via I2C of SPI. ", "heading": "Automatic Bus Detection", "image_url": "" }, { "sort": 1, "details": "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.", "heading": "I2C Addresses", "image_url": "" } ], "package": { "pads": 10, "type": "T44", "size_x": 4000, "size_y": 4000, "size_z": 0 }, "power": [ { "max": 5.5, "min": 2.5, "type": "system", "notes": "logic inputs can go down to 1.8V", "gnd_pad": [ "1" ], "function": "", "direction": "input", "is_required": true, "max_current": "", "positive_pad": [ "10" ] } ], "components": [ { "url": "https://www.ti.com/product/DAC63202W", "part": "DAC63202W", "datasheet": "https://mosaic-component-datasheets.s3.eu-north-1.amazonaws.com/13/Texas_Instruments-DAC63202W.pdf", "manufacturer": "Texas Instruments" }, { "url": "https://www.ti.com/product/TPA2028D1", "part": "TPA2028D1", "datasheet": "https://mosaic-component-datasheets.s3.eu-north-1.amazonaws.com/13/Texas_Instruments-TPA2028D1.pdf", "manufacturer": "Texas Instruments" } ], "pads": [ { "pad": "1", "geometry": { "size_x": 1000, "size_y": 400, "center_x": -1500, "center_y": 1600 }, "functions": [ { "note": "", "type": "power", "function": "GND", "direction": "input" } ] }, { "pad": "2", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": 800 }, "functions": [ { "note": "an internal 100k pull-up ", "type": "digital", "function": "GPIO", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "interface", "function": "SPI.MISO", "direction": "" } ] }, { "pad": "3", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": 0 }, "functions": [ { "note": "an internal 100k pull sets the default I2C address to 0x49.", "type": "digital", "function": "A0", "direction": "input", "is_default": true }, { "note": "", "type": "interface", "function": "SPI.MOSI", "direction": "" } ] }, { "pad": "4", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": -800 }, "functions": [ { "note": "", "type": "interface", "function": "I2C.CLK", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "interface", "function": "SPI.CS", "direction": "" } ] }, { "pad": "5", "geometry": { "size_x": 800, "size_y": 400, "center_x": -1600, "center_y": -1600 }, "functions": [ { "note": "", "type": "interface", "function": "I2C.DAT", "direction": "bidirectional", "is_default": true }, { "note": "", "type": "interface", "function": "SPI.CLK", "direction": "" } ] }, { "pad": "6", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": -1600 }, "functions": [ { "note": "", "type": "drive", "function": "OUT.0-", "direction": "output" } ] }, { "pad": "7", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": -800 }, "functions": [ { "note": "", "type": "drive", "function": "OUT.0+", "direction": "output" } ] }, { "pad": "8", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": 0 }, "functions": [ { "note": "", "type": "drive", "function": "OUT.1-", "direction": "output" } ] }, { "pad": "9", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": 800 }, "functions": [ { "note": "", "type": "drive", "function": "OUT.1+", "direction": "output" } ] }, { "pad": "10", "geometry": { "size_x": 800, "size_y": 400, "center_x": 1600, "center_y": 1600 }, "functions": [ { "note": "2.5-5.5V", "type": "power", "function": "V+", "direction": "input" } ] } ], "interfaces": [ { "name": "I2C", "type": "I2C", "parameters": { "modes": [ "slave" ], "addresses": [ { "address": "0x49", "is_default": true }, { "address": "0x48" }, { "address": "0x4A" }, { "address": "0x4B" } ], "max_clock_speed": "1MHz" }, "pad_assignments": [ { "pad": "4", "function": "I2C.CLK", "is_required": true }, { "pad": "5", "function": "I2C.DAT", "is_required": true } ] }, { "name": "SPI", "type": "SPI", "parameters": { "modes": [ "slave" ], "max_clock_speed": "50MHz" }, "pad_assignments": [ { "pad": "2", "function": "SPI.MISO", "is_required": true }, { "pad": "3", "function": "SPI.MOSI", "is_required": true }, { "pad": "5", "function": "SPI.CLK", "is_required": true }, { "pad": "4", "function": "SPI.CS", "is_required": true } ] } ] }