TFA9882UK/N2Z

Overview

The TFA9882UK/N2Z is a mono, filter-free Class-D audio amplifier manufactured by NXP Semiconductors. It utilizes a 9-bump WLCSP (Wafer Level Chip-Size Package) with a 400 μm pitch and dimensions of 1.27 × 1.49 × 0.6 mm. The device operates on a wide supply voltage range from 2.5 V to 5.5 V. It receives audio and control settings via an I2S digital interface. Key electrical parameters include an output power of 1.4 W into 4 Ω at 3.6 V supply (THD = 1%), 2.7 W into 4 Ω at 5.0 V supply (THD = 1%), and 3.4 W into 4 Ω at 5.0 V supply (THD = 10%). Quiescent power consumption is 6.5 mW at 32 kHz sampling rate and 7.65 mW at 48 kHz sampling rate. The signal-to-noise ratio is 103 dB (VDDP = 5 V, A-weighted), with an output noise voltage of 24 μV (A-weighted).

Feature Summary

• Digital input interface insensitive to clock jitter for low RF susceptibility.
• Second-order closed-loop architecture providing high supply voltage ripple rejection.
• Fully short-circuit proof across load and to supply lines.
• Current limiting and thermal protection mechanisms.

Applications

• Stereo applications using two devices combined.
• Mono mixing configurations.
• Space-constrained designs requiring small outline packages.

Procurement Notes

Verify the specific suffix 'N2Z' against official documentation, as primary datasheets reference 'N1AZ'. Confirm availability status as discontinued or limited supply through authorized channels. Ensure compatibility with existing PCB layouts designed for the 9-bump WLCSP package. Validate that the ordering part number matches the exact revision required for your design.

Selection Notes

Select this component for mono audio applications requiring high efficiency up to 90% with a 4 Ω/20 μH load. It is suitable for systems needing operation between 2.5 V and 5.5 V. Consider combining two units for stereo setups. The I2S interface makes it ideal for digital audio sources. Ensure the application can accommodate the 9-bump WLCSP form factor.

Part Context

This amplifier belongs to the TFA98xx series of smart audio amplifiers from NXP Semiconductors. These devices are designed for portable electronics and automotive infotainment systems where space and power efficiency are critical. The series typically integrates protection features and digital interfaces to simplify system design compared to analog alternatives.

Replacement Considerations

Check for direct pin-compatible replacements within the TFA98xx family. Verify if the TFA9882UK/N1AZ serves as a functional equivalent. Consult NXP's product change notification database for any superseding components.