The TPA6138A2PW is a pop-free stereo Headphone Amplifier designed to allow the removal of the output DC-blocking capacitors for reduced component count. The device is ideal for single-supply electronics where size and cost are critical design parameters. Designed using TI"s patented DirectPath™ technology, the TPA6138A2 is capable of driving 25mW into a 32R load with 3.3V supply voltage. The device has differential inputs and uses external gain-setting resistor that supports a gain range of ±1 to ±10V/V. 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. Audio output compiles with ±8kV IEC ESD protection, requiring just a simple resistor-capacitor ESD protection circuit. The TPA6138A2 has built-in active-mute control for pop-free audio on/off control.
● Differential input and single-ended output
● Adjustable gain by external gain-setting resistors
● Configurable as a second-order low-pass filter
● Ground-referenced outputs eliminate DC- blocking capacitors
● Short-circuit protection
● Click- and pop-reduction circuitry
● External undervoltage mute
● Active mute control for pop-free audio on/off control
● Low THD+N <0.01% at 10mW into 32R
● >90dB High SNR
● <1mV Low DC offset
● Green product and no Sb/Br
