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PA3632 Datasheet


The UTC PA3632 is a pop-free stereo line driver with the integrated
charge pump generating the negative supply rail which allows the
removal of the output DC-blocking capacitors. The UTC PA3632
provides a clean, pop-free ground-biased audio signal. The UTC
PA3632 is capable of driving 2VRMS into a 10k load with 3.3V supply
voltage. The device has differential inputs and uses external resistors
for flexible gain setting. Gain can be configured individually for each
The UTC PA3632 has built-in active-mute control for pop-free audio
on/off control. The UTC PA3632 has an external under-voltage detector
that mutes the output when monitored voltage drop below set value.
Using the UTC PA3632 in audio products can reduce component
count considerably compared to traditional headphone amplifiers. 

* Low THD+N<0.01% at 2Vrms Into 10k
* Stereo Direct Audio Line driver  2Vrms Into 10K With 3.3V Supply
* Integrated Charge Pump Generates Negative Supply Rail
* High SNR, >90dB
* Ground-Referenced Outputs Eliminate DC-Blocking Capacitors
* Differential Input and Single-Ended Output
* Adjustable Gain by External Gain-Setting Resistors
* Pop-Free Under-Voltage Protection
* Short-Circuit Protection
* Click- and Pop-Reduction Circuitry
* Active Mute Control for Pop-Free Audio On/Off Control
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