PCM1794A output stage opamp measurements: LM4562, NE5532, and OPA2134

LM4562 and NE5532 show almost identical performance in I/V stage, while OPA2134 is 2 dB weaker. LM4562 is the best performer in differential amplifier. The best solution is to use NE5532 in I/V-stage and LM4562 in differential amplifier as it gives almost identical performance to all-LM4562 implementation Differences in distortion are mostly due to odd left/right channel differences of PCM1794A. Introduction PCM1794A has differential current outputs and therefore requires some analog … Continue reading