PCM2912A: How the PCM2912A connects to a differential input headphone amplifier (such as the INA1620)

user5359635

Prodigy 85 points

Part Number: PCM2912A
Other Parts Discussed in Thread: INA1620, , OPA1678, OPA1611, PCM2912

1. How the PCM2912A connects to a differential input headphone amplifier (such as the INA1620)

2. If it works, will it generate additional distortion?

3. For the PCM2912A, is there a recommended headphone amplifier for use?

over 6 years ago

0 Collin Wells over 6 years ago

TI__Guru 64205 points

1.) The PCM2912A contains internal headphone amplifiers. Is the power not high enough? If so, you can certainly use a device like the INA1620 to increase the output drive strength. The PCM2912A has a single-ended output so you can use the INA1620 as a buffer or unity-gain difference amplifier referenced to GND.

2.) The noise and distortion performance of the INA1620 look superior to the PCM2912A so it shouldn't cause noticeable decreases in performance

3.) Either use the internal headphone amplifiers or use a device like the INA1620. You could also use a standard audio amplifier like the OPA1611 or OPA1678.