Nuvoton NAU88L24, Manual, Page: 1 / 96

Apr 11, 2022 Page 1 of 96 Rev 2.1
NAU88L24
Ultra-Low Power Audio CODEC with Stereo Class D Drivers and Ground-
Referenced Headphone Amplifier with Advanced Headset Detection
GENERAL DESCRIPTION
The NAU88L24 is an ultra-low power high performance audio codec designed for smartphone, tablet PC, and other
portable devices that supports both analog and digital audio functions. It includes one I2S/PCM interface, one digital
mixer, two high quality DACs, two high quality ADCs, two mono differential or one stereo differential analog microphone
inputs, four analog single-ended microphone inputs, four digital PDM microphone inputs, one single ended stereo
auxilary or one differential mono inputs, one differential HS mic input, one stereo 2.9W class D loudspeaker amplifier
driver
for 4 Ω loading and 5V supply
, and one stereo class G headphone amplifier with automatic headset detection.
The advanced on-chip signal processing engine that includes dynamic range compressors (DRC), 5-band parametric
equalizer (PEQ), and programmable high pass and notch filter block, can maximize audio quality and eliminate any
undesirable frequency components.
The NAU88L24 also has powerful headset detection that supports jack insertion / ejection, microphone detection,
distinct key / short key / long key / key release detection features as well as an integrated frequency locked loop (FLL)
to support various clocks.
FEATURES

DAC: 103dB SNR (A-weighted) @ 0dB gain, 1.8V
and -77dB THD @ 20
mW and RL= 32Ω, DAC
playback to headphone output mode

ADC: 100dB SNR (A-weighted) @ 0dB MIC gain,
1.8V, Fs = 48KHz and -85dB THD, 1.8V, MIC gain
6dB, OSR 128x

1 Digital I2S/PCM I/O port

Dynamic Range Compressor (DRC)

5 Band Parametric Equalizer

1 Headset Microphone, 4 Analog or 4 Digital PDM
MIC input supports

Stereo .97W Class D Loudsp
eaker @ 4.2V, 8Ω,
1% THD+N (1.38W @ 5
.0V, 8Ω, 1% THD+N)

Class G Headphone Amplifier (27
mW @ 32Ω, 1%
THD+N)

Stereo Auxiliary Input

Sampling rate from 8K to 96 KHz

Headset Detection

Jack Insertion and Ejection Detection

MIC Detection and Distinct Keys Detection

Package:
QFN-48 (6X6mm, 0.4mm Pitch) package
56 Balls WLCSP package with 0.4mm Pitch
package
Applications

Tablets / Ultra-Portable Laptops

Smartphones

Audio Docking Systems

Portable Game Players

Cameras