A2B BUS FEATURES
Line topology
Single main node, up to 16 subordinate nodes
Up to 30 m between nodes and up to 300 m overall cable
length
Communication over distance
Synchronous data
Multichannel I2S/TDM to I2S/TDM
Clock synchronous, phase aligned in all nodes
Low latency node to node communication
Control and status information I2C to I2C
GPIO over distance
Bus power or local power subordinate nodes
Configurable with SigmaStudio+ graphical software tool

BASELINE A2B TRANSCEIVER FEATURES
Configurable as A2B bus main node or subordinate node
Programmable via I2C and SPI interfaces
8-bit to 32-bit multichannel I2S/TDM interface
I2S/TDM/PDM programmable data rate
Up to 51 channels of 16-bit data or 32 channels of 24-bit
data between nodes
PDM inputs for up to 4 high dynamic range microphones on
main or subordinate nodes
Support for receiving I2S/TDM and PDM data on the same
node
Unique ID register for each transceiver
Support for crossover or straight-through cabling
AD2437 TRANSCEIVER ENHANCEMENTS
Mixed Signal
ADC monitoring of supply voltages
Supports 3.3 V input at VIN in Low Voltage Input (LVI)
mode
Digital
High speed SPI (up to 10 Mbps) over distance
Dedicated hardware reset pin
I2S/TDM crossbar switch
Flexible mapping of Tx/Rx TDM channel data to A2B slot
Support for I2C fast mode plus (1 MHz)
Support for LED lighting control using 4 PWM outputs
8 GPIO pins with configurable pin mapping

APPLICATIONS
Conference room transducer nodes
Musical instrument connectivity
Distributed audio systems
Personal audio zones