AD2427WCCSZ

Overview

The AD2427WCCSZ is an Automotive Audio Bus (A2B) transceiver manufactured by Analog Devices Inc. It supports A2B bus master operation and features two functional transceiver blocks (TRX A and TRX B). The device provides a multichannel I2S/TDM interface supporting up to 32 upstream and 32 downstream channels, alongside a PDM interface for four high-dynamic-range microphone inputs. It operates on a 3V to 3.63V supply voltage and is qualified for automotive applications with an operating temperature range of -40°C to +105°C. The component is housed in a 32-LFCSP-SS (5x5) package.

Feature Summary

• Configurable as an A2B bus master node with dual transceiver blocks (TRX A and TRX B)
• Supports up to 32 upstream and 32 downstream I2S/TDM channels
• Integrated PDM interface for direct connection of up to four digital microphones
• Automotive grade qualification with -40°C to +105°C operating temperature range

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and tape/reel configuration. Ensure compatibility with the system's I2C addressing requirements, as the AD2427 functions as a master node requiring distinct BASE_ADDR and BUS_ADDR configurations. Confirm that the design accounts for the power supply constraints of the VIN pin when used in bus-powered topologies.

Selection Notes

Select the AD2427WCCSZ when a master node capability is required within an A2B network. This model is suitable for designs needing dual transceiver paths and support for multiple PDM microphones. Compare channel counts and master/slave roles against other family members like the AD2426 or AD2428 to ensure the specific topology requirements are met without over-specifying components.

Part Context

The AD2427 belongs to the AD2420(W) through AD2429(W) series of Automotive Audio Bus transceivers. It is distinguished from peers like the AD2426 by its master node capability and dual transceiver blocks. While sharing the same A2B protocol foundation, it offers different channel capacities and interface options compared to slave-only devices in the lineup.

Replacement Considerations

Direct replacements within the same family include the AD2428W, which also supports master operation and dual transceiver blocks. Verify that any substitute part matches the required master functionality and I2S/PDM channel counts. Cross-referencing the specific electrical characteristics and package dimensions is necessary when substituting with non-Analog Devices components.