Automotive Audio Bus 2.0 transceiver provides a 98.304 Mbps full-duplex digital audio and data link over a single differential wire pair. The device supports main-node or subordinate-node operation, up to 11 subordinate nodes, up to 15 m between nodes, and up to 80 m overall cable length. Interfaces include OA SPI Ethernet, I2C, SPI, I2S/TDM, PDM, PWM, GPIO, ADC inputs, and 4-channel ASRC input and output. The transceiver supports 119 upstream and 119 downstream 48 kHz 16-bit audio channels per link and asynchronous Layer-2 A2B MAC-PHY data up to 23 Mbps.
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| Bus protocol | A2B 2.0 |
| Bus data rate | 98.304Mbps |
| Duplex mode | Full duplex |
| Topology | Single main node with line topology |
| Maximum subordinate nodes | 11nodes |
| Maximum distance between nodes | 15m |
| Maximum overall cable length | 80m |
| Upstream audio channels per link | 119 at 48 kHz, 16-bitchannels |
| Downstream audio channels per link | 119 at 48 kHz, 16-bitchannels |
| Supported audio word lengths | 16, 24, 32bit |
| Asynchronous Ethernet data rate | Up to 23Mbps |
| Mailbox message size | Up to 126bytes |
| Serial I/O pins | 8 configurable I2S/TDM/PDMpins |
| SIO clock domains | 2domains |
| PDM microphone inputs | 4microphones |
| PWM outputs | 4outputs |
| General-purpose ADC inputs | 2inputs |
| GPIO count | Up to 16 multiplexedGPIO |
| ASRC channels | 4 input and outputchannels |
| Host/control interfaces | OA SPI, I2C, SPI, I2S/TDM, PDM |
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These are design resources that include the Analog Devices ADAA2457
User manual for the ADAA245X-EV-A1CA evaluation board for the ADAA2457 A2B transceiver. Supports Main and Local Powered Sub node configurations via SigmaStudio+.
