AD2428BCPZ

Overview

The AD2428BCPZ is an Automotive Audio Bus (A2B) transceiver manufactured by Analog Devices Inc. It supports configurable master operation and connects to host controllers via I2C control and multichannel I2S/TDM data interfaces. The device accommodates up to 32 upstream and 32 downstream channels, alongside four PDM microphone inputs. Operating within a supply voltage range of 3V to 3.63V, it functions reliably across an industrial temperature range of -40°C to +85°C. Packaged in a 32-LFCSP (5x5) surface-mount format, the component facilitates synchronous audio communication over twisted-pair cabling.

Feature Summary

• Configurable A2B bus master operation with support for up to 10 discoverable slave nodes
• Multichannel I2S/TDM interface supporting 8-bit to 32-bit data widths and programmable rates
• Integrated PDM interface for direct connection of up to four high dynamic range microphones
• Automotive grade qualification with operating temperatures ranging from -40°C to +85°C

Applications

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

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and temperature grade. Confirm compatibility with the target host controller's I2C addressing scheme and I2S/TDM timing requirements. Ensure power supply rails meet the specified voltage ranges for DVDD and VIOVDD during system design validation.

Selection Notes

Select this model when master node functionality is required within an A2B topology. Compare channel counts against other family members like the AD2429 if fewer slaves are needed. Verify that the 32-LFCSP package dimensions fit the PCB layout constraints. Ensure the application environment stays within the specified -40°C to +85°C operating temperature limits.

Part Context

This component belongs to the AD242xW series of Automotive Audio Bus transceivers. It shares architectural similarities with models such as the AD2420, AD2426, AD2427, and AD2429. Key differentiators include its master capability and specific channel configurations compared to slave-only variants in the same product family.

Replacement Considerations

Direct substitutes within the same family include the AD2428KCPZ or AD2428WCCSZ-RL. Verify pinout compatibility and software register configuration before swapping. Other models may offer different slave discovery limits or PDM input counts.