雕虫小技

TI的几款音频运放参数对比

收购BB以及NS的缘故,现在的音频领域TI是当之无愧的集大成者

OPA827 OPA627 OPA1641 OPA1611 LME49710
Input stage structure JFET JFET JFET Bipolar Bipolar
Input offset voltage 0.075mV 0.28mV 1mV 0.1mV 0.05mV
Input noise voltage(1KHz) 3.8nV/sqrt(Hz) 5.6nV/sqrt(Hz) 5.1nV/sqrt(Hz) 1.1nV/sqrt(Hz) 2.5nV/sqrt(Hz)
1/f corner frequency 20Hz 80Hz 20Hz 20Hz N.A.
Input current noise(1KHz) 2.2fA/sqrt(Hz) 2.5fA/sqrt(Hz) 0.8fA/sqrt(Hz) 1.7pA/sqrt(Hz) 1.6pA/sqrt(Hz)
THD+N(%) 1KHz/1Kohm 0.00004 0.00003 0.00005 0.000015 0.00003
Slew rate(V/us) 28 55 20 27 20
Gain Bandwidth(MHz) 55 16 11 40 55

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