PA3138 Datasheet | Unisonic Technologies

UNISONIC TECHNOLOGIES CO., LTD DIRECT HEADPHONE DRIVER WITH ADJUSTABLE GAIN CMOS IC - DESCRIPTION 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. The device has differential inputs and uses external resistors for flexible gain setting. Gain can be configured individually for each channel. The device can also be configured as a second-order low-pass filter and is ideal for interfacing with...