====== A2B Class-D Amplifier Module for SHARC Audio Module ======

The [[resources/tools-software/sharc-audio-module|SHARC Audio Module]] A<sup>2</sup>B Class-D Amplifier Module is an [[adi>a2b|A2B]] connected board that contains two Class-D [[adi>en/products/audio-video/audio-amplifiers/class-d-audio-amplifiers/ssm3582.html|SSM3582]] amplifier ICs, providing 4 channels of audio output.

{{:resources:tools-software:sharc-audio-module:hardware:sam-class-d-top.png?direct&500|}}

**The A<sup>2</sup>B Class-D Amplifier Module**

{{:resources:tools-software:sharc-audio-module:hardware:class-d-diagram.png?500|}}

**Block Diagram of the A<sup>2</sup>B Class-D Amplifier Module**

===== Schematics, PCB Layout, Bill of Materials =====

<WRAP round download>
SHARC Audio Module A<sup>2</sup>B Class-D Amplifier Module Design and Integration Files
  * {{:resources:tools-software:sharc-audio-module:hardware:a0974-2017.pdf | Schematics}}
  * {{:resources:tools-software:sharc-audio-module:hardware:a0974-2017_bom_hlm.xlsx | Bill of Materials}}
  * {{:resources:tools-software:sharc-audio-module:hardware:adzs-audioa2bamp_design_files.zip | Fabrication and Assembly Files}}
</WRAP>

===== Automotive Audio Bus (A2B) Interface Duraclick (P4, P5) =====

The A<sup>2</sup>B bus uses crossover cables to connect nodes to each other. ''P4'' connects to upstream towards the Master Node in the network and ''P5'' connects downstream to the next slave in the network.

The A<sup>2</sup>B Class-D Amplifier Module uses the [[adi>en/products/audio-video/automotive-audio-bus/ad2428w.html|AD2428W]] IC.

===== SSM3582 Class-D Amplifier =====

There are two ADI [[adi>en/products/audio-video/audio-amplifiers/class-d-audio-amplifiers/ssm3582.html|SSM3582]] Class-D amplifiers on the A<sup>2</sup>B Class-D Amplifier Module. Each is two channels.

At 16V, the max power per channel is ~24w of power.

**P11 AMP1 Left Channel Output**

| ''1'' | Positive |
| ''2'' | Negative |

**P12 AMP1 Right Channel Output/MONO**

| ''1'' | Positive |
| ''2'' | Negative |

**P13 AMP2 Left Channel Output**

| ''1'' | Positive |
| ''2'' | Negative |

**P14 AMP2 Right Channel Output/MONO**

| ''1'' | Positive |
| ''2'' | Negative |

Populate ''JP6'' & ''JP7'' to configure AMP1 into MONO Output on ''P12''.
Populate ''JP8'' & ''JP9'' to configure AMP2 into MONO Output on ''P14''.

===== USBi Connector for SigmaStudio (P1) =====

The USBi Connector on the [[adi>sharcaudiomodule|SHARC Audio Module]] allows for the use of the USBi adapter for [[adi>sigmastudio|SigmaStudio]] and bare metal programming.

===== +12v Input Power Jack (P3) =====

The A<sup>2</sup>B Class-D Amplifier Module is designed to run off a 12v to 16v supply. A 12v 2A DC power supply is included in the kit. The barrel connector on the A<sup>2</sup>B Class-D Amplifier Module can handle up to 3A current.

<WRAP round info>
**The Class-D Amplifier Module is shipped with a US power supply. Here is a universal option: https://www.digikey.com/products/en?keywords=102-3580-ND**</WRAP>
===== Power Supply Input (P10) =====

''P10'' is a power supply input jack to connect up to 16v @ 8A MAX. There is an 8A fuse on the Positive input of the P10 connector.

===== Pushbuttons (PB1, PB2) =====

Two GPIO pushbuttons are provided on the A<sup>2</sup>B Class-D Amplifier Module. They are connected as follows:

  * ''PB1'' is connected to ''IO1'' on AD2428W
  * ''PB2'' is connected to ''IO2'' on AD2428W

===== GPIO LEDs (LED1, LED2) =====

There are two GPIO-controlled LEDs on the A<sup>2</sup>B Class-D Amplifier Module. They are connected as follows:

  * ''LED1'' is connected to IO0 on the ''AD2428W''
  * ''LED2'' is connected to IO7 on the ''AD2428W''

===== PDM/TDM Connectors =====

**JP5 PDM MIC**

|  3.3v|  ''1''|''2''  |GND  |
|  DRX0|  ''3''|''4''  |GND  |
|  DRX1|  ''5''|''6''  |GND  |
|  BLCK|  ''7''|''8''  |GND  |

** P2 Buffered TDM Signals **

|   B_DTX0|  ''1'' |''2''   |GND  |
|   B_DTX1|  ''3'' |''4''   |GND  |
|   B_DRX0|  ''5'' |''6''   |GND  |
|   B_DRX1|  ''7'' |''8''   |GND  |
|  B_FSYNC|  ''9'' |''10''  |GND  |
|   B_BLCK|  ''11''|''12''  |GND  |

** P15 Unbuffered TDM Signals **

|   DTX0|   ''1''|''2''   |GND  |
|   DTX1|   ''3''|''4''   |GND  |
|   DRX0|   ''5''|''6''   |GND  |
|   DRX1|   ''7''|''8''   |GND  |
|  FSYNC|   ''9''|''10''  |GND  |
|   BLCK|  ''11''|''12''  |GND  |

===== EEPROM =====

The A<sup>2</sup>B Class-D Amplifier Module has a TWI 256k EEPROM for configuration data. The EEPROM used is the [[http://www.microchip.com/wwwproducts/en/24FC256|24FC256I/MS]].

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{{navigation SHARC Audio Module#.audioproj-fin|Audio Project Fin#..hardware|Hardware Reference#..faust|Faust and the SHARC Audio Module}}