NAU8325 Datasheet | Nuvoton Technology

FEATURE - Low SPK_VDD Quiescent Current 2.1m A at 3.7V for 2 channels 3.2m A at 5V for 2 channels - Gain Setting with 2 wire interface 22d B to -62d B (plus mute) - Powerful Stereo Class-D Amplifier 2ch x 3.0W (4Ω @ 5V, 10% THD+N) 2ch x 1.32W (4Ω @ 3.7V, 1% THD+N) 2ch x 1.72W (8Ω @ 5V, 10% THD+N) 2ch x 0.75W (8Ω @ 3.7V, 1% THD+N) - Low Output Noise: 18 µVRMS @0d B gain - 80d B PSRR @217Hz - Low Current Shutdown Mode - Click-and Pop Suppression - Package: QFN-20 / Wettable QFN-20 - Package is Halogen-free, Ro HS-pliant and TSCA-pliant Applications - Notebooks / Tablet PCs - Personal Media Players / Portable TVs - MP3 Players - Portable Game Players Sep 16, 2024 Page 7 of 51 Rev 2.9 NAU8325/NAU83U25 2 GENERAL DESCRIPTION NAU8325/NAU83U25 is a stereo high efficiency filter-free Class-D audio amplifier, which is capable of driving a 4Ω load with up to 3.0W output power. This device provides I2C control and I2S audio input with low standby current and fast start-up time. NAU8325/NAU83U25 is ideal for the portable applications of battery drive, as it has advanced features like 80d B PSRR, 90% efficiency, ultra-low quiescent current (i.e. 2.1m A at 3.7V for 2 channels) and superior EMI performance. NAU8325 is specified for operation from -40℃ ~ +85℃ with QFN-20 / Wettable QFN-20 package. NAU83U25 is specified for operation from -40℃ ~ +105℃ with QFN-20 / Wettable QFN20 package. NAU83U25 is available for Automotive Grade AEC-Q100 qualification & TS16949 pliant. Sep 16, 2024 Page 8 of 51 Rev 2.9 3 PART INFORMATION NAU8325/NAU83U25 20 SPK_GND 19 SPK_RN 18 SPK_VDD 17 SPK_LN 16 SPK_GND SPK_RP 1 SPK_VDD 2 A_GND 3 VREF 4 A_VDD 5 NAU8325 Stereo Class D 4x4mm QFN 20-Pin 15 SPK_LP 14 SPK_VDD 13 IO_GND 12 SDA 11 SCL LRCK 6 DACDAT 7 BCK 8 IO_VDD 9 MCLK 10 QFN exposed thermal pad must be connected to A_GND Figure 1 Pin Configuration of NAU8325/NAU83U25 (TOP VIEW) Sep 16, 2024 Page 9 of...