GENERAL DESCRIPTION
The NJU8721 is a class D Headphone Amplifier featuring 6th ∆Σ modulation. It includes Digital
Attenuator, Mute, and De-emphasis circuits. It converts Digital source input to PWM signal output
which is output PWM signal converted to analog signal with simple external LC Filter. The NJU8721
realizes very high power-efficiency by class D operation. Therefore, it is suitable for portable audio
set and others.

FEATURES
# Stereo Headphone Power Amplifier
                      : 50mW+50mW
# Sixth-order 32fS Over Sampling ∆Σ & PWM
# Internal 8fS Over Sampling Digital Filter
# Sampling Frequency : 96kHz (Max.)
# De-Emphasis : 32kHz, 44.1kHz, 48kHz
# System Clock : 256fS
# Digital Processing : Attenuator 107step, LOG Curve : Mute
# Digital Audio Interface : 16bit, 18bit
                                       : I2S, LSB Justified, MSB Justified
# Operating Voltage : 3.0 to 3.6V
# Driving Voltage : VDD to 5.25V
# C-MOS Technology
# Package Outline : SSOP20