PA3138G-P14-R Datasheet, PDF (1/6 Pages) Unisonic Technologies – Differential Input and Single-Ended Output

UNISONIC TECHNOLOGIES CO., LTD
PA3138
Preliminary
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 PWM audio sources.
The UTC PA3138 has built-in active-mute control for pop-free
audio on/off control. The UTC PA3138 has an external
under-voltage detector that mutes the output when monitored
voltage drop below set value.
Using the UTC PA3138 in audio products can reduce
component count considerably compared to traditional headphone
amplifiers.
 FEATURES
* Low THD+N<0.01% at 10mW Into 32Ω
* Stereo Direct Headphone Amplifier driver
40 mW Into 32Ω With 3.3-V Supply
* 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
Ordering Number
PA3138G-P14-R
* 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
* Short-Circuit Protection
* Click- and Pop-Reduction Circuitry
* Active Mute Control for Pop-Free Audio On/Off
Control
Package
TSSOP-14
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2016 Unisonic Technologies Co., Ltd
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