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EVAL-AD2428WC1BZ
Bus-Powered A2B® Subordinate Node (No I2S/TDM, 4 PDM Mics)
Overview
Features and Benefits
- AD2428W Automotive Audio Bus A2B® Transceiver
- A2B subordinate operation
- Powered over A2B bus
- Four PDM microphone inputs (INMP621)
- GPIO LED
Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.
Product Details
An Automotive Audio Bus (A2B®) system consists of a single main node and at least one subordinate node, where the transceiver at the host controller is the main node. The main transceiver generates clock, synchronization, and framing for all subordinate nodes and is programmable over a control bus (I2C) for configuration and readback. An extension of this control bus is embedded in the A2B data stream, which enables the host to directly access subordinate transceiver registers and any I2C-connected peripherals on subordinate nodes. Transceivers can connect directly to PDM microphones and to numerous peripherals via I2C and a multichannel I2S/TDM interface. Finally, the transceiver also supports an A2B bus powering feature, where the main node supplies voltage and current to the subordinate nodes over the same daisy-chained, twisted pair wire cable as used for the communication link, thus eliminating the need for a power supply on bus-powered subordinate nodes. Due to the numerous configurations that are possible for a given A2B system, there are several evaluation platforms that can be used in combination to verify system operation, as summarized in the table below.
| A2B Evaluation Board | Main/Subordinate | Power Supply |
I2S/TDM | PDM Mics |
| EVAL-AD2428WD1BZ | Main/Subordinate | Local | Yes | 3 |
| EVAL-AD2428WB1BZ | Subordinate | Bus | Yes | 2 |
| EVAL-AD2428WC1BZ | Subordinate | Bus | No | 4 |
| EVAL-AD2428WG1BZ | Subordinate | Local | Yes | 0 |
| ADZS-AD2428MINI | Main/Subordinate | Local/Bus | Yes | 0 |
Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.
Markets and Technologies
Applicable Parts
Package Contents
- EVAL-AD2428WC1BZ board
- 1.8m twisted-pair CAT5e-rated cable with DuraClik™ connectors