Alfa Rpar - AS401A - Hi-End Audio Operational Amplifier

AS401 / AS401A is bipolar-input Hi-End audio operational amplifier and provide ultra-low THD+Noise level - 130dB (1Khz) and -110dB (40kHz) for RL= 600 Ohm & CL=100 pF. Amplifier drives a 32 Ohm load at 10 mW and 600 Ohm load at 70 mW. AS401 is unity-gain stable and provides excellent dynamic behavior over a wide range gain and load conditions at a wide supply range of ±4,5 to ±18 V.
AS401A benefits from additional balance inputs (offset trimming) and additional pin for case shielding.
AS401 / AS401A is a hybrid module with DIP8 footprint.

Features:
• Hi-End sound quality
• less then 2 nV/√Hz low input voltage noise
• ultra-low total harmonic distortion+ noise (RL = 600 Ohm CL = 330 pF):
         0,00015 % at 20 kHz
         0,00036 % at 40 kHz
• unity-gain stable at RL=600 Ohm CL=1000 pF
• phase margin at G=+1 & RL = 600 Ohm without external correction:
         125° at CL=100 pF
           60° at CL=330 pF
• slew rate G=+1 30 V/μS & RL = 600 Ohm CL = 330 pF
• low input offset voltage 250μV (max)
• bandwidth > 35MHz
• wide supply range +9 V to +36 V (±4,5 V -±18 V)
• input current < 1μA
• linear output stage class A
• low small-signal overshoot with capacitive load (100mV output step):
               8% RL=600 Ohm, RSL=0 Ohm, CL=100 pF;
             10% RL=600 Ohm, RSL=0 Ohm, CL=250 pF;
             30% RL=600 Ohm, RSL=0 Ohm, CL=1000 pF;
             15% RL=600 Ohm, RSL=25 Ohm, CL=1000 pF
• no phase reversal
• peak-to-peak output voltage swing 32V typ. with Vcc= ±18V and Rl=600 Ohm