DESCRIPTION

 

The UTC ALDR632 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

ALDR632 provides a clean, pop-free ground-biased audio signal. The

UTC ALDR632 is capable of driving 2VRMS into a 10kΩ 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 channel.

The UTC ALDR632 has built-in active-mute control for pop-free

audio on/off control. The UTC ALDR632 has an external under-voltage

detector that mutes the output when monitored voltage drop below set

value.

The device has differential inputs and uses external gain-setting

resistors to support a gain range of ±1V/V to ±10V/V, and gain can be

configured individually for each channel. Line outputs have ±8-Kv

(HBM) IEC ESD protection, requiring just a simple resistor-capacitor

ESD protection circuit.

Using the UTC ALDR632 in audio products can reduce component

count considerably compared to traditional headphone amplifiers.

 

 

FEATURES

 

* Low THD+N<0.01% at 2Vrms Into 10kΩ

* Stereo Direct Audio Line driver 2Vrms Into 10KΩ 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