AD2420KCPZ

Overview

The AD2420KCPZ is an Automotive Audio Bus (A2B) transceiver designed for single-master, multiple-slave topologies. It supports up to 15 meters between nodes and 40 meters overall cable length. The device features a multichannel I2S/TDM interface with 8-bit to 32-bit resolution and programmable data rates. It includes two PDM microphone inputs for high dynamic range audio capture. The transceiver operates on a 3V to 3.63V supply and is housed in a 32-LFCSP package. It is qualified for automotive applications and supports bus power or local power slave nodes.

Feature Summary

• Automotive Audio Bus (A2B) compliant with line topology support
• Multichannel I2S/TDM interface with up to 32 upstream/downstream channels
• Integrated PDM interface supporting up to 2 high dynamic range microphones
• I2C control interface for configuration and remote register access

Applications

• Audio communication links in vehicles
• Microphone arrays and beamforming systems
• Hands-free and in-car communication systems
• Active and road noise cancellation
• Audio/video conferencing systems

Procurement Notes

Verify the component status as End-of-Life (EOL) before procurement planning. Confirm that the K suffix denotes the specific temperature grade and packaging variant required for the design. Ensure compatibility with existing A2B master controllers and check for available replacement options from Analog Devices due to production discontinuation.

Selection Notes

Select this transceiver for applications requiring A2B slave connectivity with limited PDM input needs. The AD2420 supports only TRX block A, distinguishing it from dual-block variants like the AD2428. Ensure the system design accommodates the 32-LFCSP package dimensions and thermal requirements. Verify that the host processor supports the necessary I2C addressing and I2S/TDM timing configurations.

Part Context

The AD2420 is part of the AD242x(W) family of A2B transceivers from Analog Devices. It serves as a slave node transceiver in the A2B network architecture. Unlike the AD2425W which acts as a master, the AD2420 connects to a master controller via I2C and exchanges audio data over the A2B bus. It is distinct from the AD2426/AD2427 which have different cable length specifications and functional block configurations.

Replacement Considerations

Publicly confirmed substitute part numbers are not explicitly listed in the provided documentation. Due to the EOL status, consult Analog Devices for current alternative recommendations within the AD242x family or newer generations.