AD2437 Series

A2B Transceiver Supporting 50W Bus Power and Extended Distance

Catalog

A2B Transceiver Supporting 50W Bus Power and Extended Distance

Part	Operating Temperature [custom]	Voltage - Supply [Min]	Voltage - Supply [Max]	Applications	Supplier Device Package	Mounting Type	Package / Case	Interface	Number of Channels	Function	Operating Temperature [Min]	Operating Temperature [Max]
Analog Devices AD2437BCPZY-RL	-40 °C 105 °C	1.7 V	1.98 V	Audio Systems Musical Instruments	48-LFCSP 7x7	Surface Mount	48-WFQFN Exposed Pad CSP	GPIO I2C I2S PDM SPI TDM	51	Audio Transceiver
Analog Devices AD2437KCPZY		1.7 V	1.98 V	Audio Systems Musical Instruments	48-LFCSP 7x7	Surface Mount	48-WFQFN Exposed Pad CSP	GPIO I2C I2S PDM SPI TDM	51	Audio Transceiver	0 °C	105 °C

Catalog

A2B Transceiver Supporting 50W Bus Power and Extended Distance

Key Features

• Line topologySingle main node, up to 16 subordinate nodesUp to 30 m between nodes and up to 300 m overall cable length

• Single main node, up to 16 subordinate nodes

• Up to 30 m between nodes and up to 300 m overall cable length

• Communication over distanceSynchronous dataMultichannel I2S/TDM to I2S/TDMClock synchronous, phase aligned in all nodesLow latency node to node communicationControl and status information I2C to I2CGPIO over distance

• Synchronous dataMultichannel I2S/TDM to I2S/TDMClock synchronous, phase aligned in all nodesLow latency node to node communication

• 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

• Configurable as A2B bus main node or subordinate node

• Programmable via I2C and SPI interfaces

• 8-bit to 32-bit multichannel I2S/TDM interfaceI2S/TDM/PDM programmable data rateUp to 51 channels of 16-bit data or 32 channels of 24-bit data between nodes

• 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

• Mixed SignalADC monitoring of supply voltagesSupports 3.3 V input at VIN in Low Voltage Input (LVI) mode

• ADC monitoring of supply voltages

• Supports 3.3 V input at VIN in Low Voltage Input (LVI) mode

• DigitalHigh speed SPI (up to 10 Mbps) over distanceDedicated hardware reset pinI2S/TDM crossbar switchFlexible mapping of Tx/Rx TDM channel data to A2B slotSupport for I2C fast mode plus (1 MHz)Support for LED lighting control using 4 PWM outputs8 GPIO pins with configurable pin mapping

• High speed SPI (up to 10 Mbps) over distance

• Dedicated hardware reset pin

• I2S/TDM crossbar switchFlexible mapping of Tx/Rx TDM channel data to A2B slot

• 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

Description

The AD2437 A2B®transceiver provides a multichannel, I2S/TDM link over distances of up to 30 m between nodes. It embeds bidirectional synchronous pulse-code modulation (PCM) data (for example, digital audio), clock, and synchronization signals onto a single-pair differential cable. A2B supports a direct point to point connection and allows multiple, daisy-chained nodes at different locations to contribute and/or consume time division multiplexed channel content.A2B is a single main node, multiple subordinate node system where the transceiver at the host controller is the main node. The main node generates clock, synchronization, and framing for all subordinate nodes. The main A2B transceiver is programmable over a control port (I2C/SPI) for configuration and read back. An extension of the control port protocol is embedded in the A2B data stream. This allows direct access to registers and status information on subordinate transceivers, as well as I2C to I2C, SPI to I2C, or SPI to SPI communication from the host to a peripheral in a subordinate node. SPI to SPI communication between subordinate nodes can be performed directly and does not need to involve the main node.The transceiver can connect directly to general-purpose digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), digital microphones, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and codecs through a multichannel I2S/TDM interface. It also provides a pulse density modulation (PDM) interface for direct connection of up to four PDM digital microphones.The transceiver supports a bus power feature, where the main node supplies voltage and current to the subordinate nodes over the same daisy-chained, single-pair wire or XLR/DMX cable as used for the communication link.The transceiver also supports a broad spectrum of Ethernet cables in which the A2B occupies only one pair of a category (CAT) cable. This frees up the remaining CAT cable pairs for power delivery.APPLICATIONSConference room transducer nodesMusical instrument connectivityDistributed audio systemsPersonal audio zones