PA3138 Overview
The UTC PA3138 is a pop-free stereo headphone amplifier with the integrated charge pump generating the negative supply rail which allows the removal of the output DC-blocking capacitors. The UTC PA3138 provides a clean, pop-free ground-biased audio signal. The UTC PA3138 is capable of driving 25mW into a 32-Ω load with 3.3-V supply voltage.
PA3138 Key Features
- Low THD+N<0.01% at 10mW Into 32Ω
- Stereo Direct Headphone Amplifier driver
- Integrated charge pump Generates Negative Supply Rail
- High SNR, >90dB
- Ground-Referenced Outputs Eliminate DC-Blocking Capacitors
- Differential Input and Single-Ended Output
- ORDERING INFORMATION
- Adjustable Gain by External Gain-Setting Resistors
- Pop-Free Under-Voltage Protection
- Configurable as a Second-Order Low-Pass Filter Ideal for PWM Audio Sources