AD2420

• AD2428W Automotive Audio Bus A²B^® Transceiver
  • A²B subordinate operation
  • Multichannel I²S/TDM interface
  • Locally powered
    • LT3505 - 1.2 A, Step-Down Switching Regulator
    • LT1965 - 1.1 A, Low Noise, Low Dropout Linear Regulator
• ADAU1761 SigmaDSP^® Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL
• EEPROM
• Power, Status, GPIO, and Interrupt LEDs
• Pushbutton Interrupt Generation

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

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.

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

• 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.

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.

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

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.

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

• AD2428W Automotive Audio Bus A²B^® Transceiver
  • A²B subordinate operation
  • Multichannel I²S/TDM interface
  • Two PDM microphone inputs
  • Powered over A²B bus
• ADAU1761 SigmaDSP^® Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL
• Status and Interrupt LEDs
• Pushbutton Interrupt Generation

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

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.

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.

• Two SSM3582 high-efficiency Class-D amplifiers
  • Inputs: 4 mono (or 2 stereo) channels, sourced by
    • the SHARC^® Audio Module (or another A²B source) connected via A²B
    • a TDM I2S source connected to 12-pin header
  • Outputs: 4 amplified speaker channels at 15W each or 2 "bridged" amplified channels at 50W each. Each SSM3582 can provide:
    • 2× 14.67 W output at 12 V supply to 4 Ω loads at <1% THD + N, or
    • 1× 49.69 W output at 16 V supply to 2 Ω loads at <1% THD + N
  • Class-D amp bridged mode can be used to support 2.1 audio configurations
• AD2428W low-latency A²B audio bus transceiver
  • Connects to SHARC Audio Module (or another A²B source) via twisted-wire-pair cable (included)
  • Two pushbuttons routed to I/O pins (can be sensed by any system A²B node)
  • Two GPIO pins routed to LEDs (can be driven by any system A²B node)
• Can be cascaded via A²B to provide 8 amplified output channels to support 7.1 and other speaker configurations
• Further expansion possible using additional modules connected via A²B or fins connected directly to the SHARC Audio Module expansion port 
• Fully integrated A²B software and drivers in the SHARC Audio Module Bare Metal Audio Framework and the SigmaStudio^® A²B Software package

The A²B Class-D Amplifier Module leverages ADI's low-latency A²B audio bus technology, featuring an AD2428W A²B transceiver (serving as an A²B subordinate) that accepts audio over the A²B bus from a connected A²B node in the system. The ADZS-AUDIOA2BAMP Module drives the received A²B data to a pair of high-efficiency, digital input, stereo SSM3582 class-D audio amplifiers. Audio is transmitted digitally to the amplifier, minimizing the possibility of signal corruption in digital environments. See the SSM3582 data sheet for more information.

As the A²B Class-D Amplifier Module is an A²B subordinate node, it must be incorporated into an A²B system with a main node, such as the SHARC^® Audio Module or the A²B main evaluation board. Connect the A²B Class-D Amplifier Module to the system using the included A²B twisted-wire-pair cable.

• AD2428W Automotive Audio Bus A²B^® Transceiver
• Multichannel I2S/TDM interface
• Main or Subordinate Node (Local Power & Bus Power)
• 100 pin connector for interfacing with EV-SOMCRR-EZKIT
• “Break out board” for A2B
• 32 pin 0.1" header for customers to interface their own designs
• EEPROM
• LT8620 – 2A, Step-Down Switching Regulator
• Power, Status, GPIO, and Interrupt LEDs

ADZS-AD2428MINI is a low-cost, mini break-out board which can interface with EV-SOMCRR-EZKIT (via a 100-pin connector) or any custom board (via a 32 pin 0.1" header). It supports main and subordinate node capability as well as bus and local power configurations.

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.

Please contact your local ADI sales office or authorized ADI product distributor to receive additional product information and technical support.