That 公司的THAT1570是多用途高性能电流反馈放大器,适合用于差分麦克风前置放大器和总线加法应用.增益调整采用三个外接电阻来实现,范围从0到60dB. 工作电压±5V 到±18V,工作电流7.5mA,60 dB增益的输入噪音为1 nV/√Hz, 30 dB增益的THD+N为0.0003%.本文介绍THAT1570主要特性,方框图,以及多种应用电路.

THAT1570 主要特性:
  Low Noise:
  1 nV/√Hz input noise (60 dB gain)
  Low THD+N:
 0.0003% ≤30 dB gain
  0.0008% @ 40 dB gain
  Low Current: 7.5 mA typ
  Wide Bandwidth: 4.2MHz @40dB gain
  High Slew Rate: 53 V/us
  Wide Signal Swing: >28.7dBu (±18V supplies)
  Gain adjustable from 0 to >60 dB
  Differential output
  Small 4 x 4mm QFN16 package
  Mates with THAT5171 Digital Preamplifier Controller IC
THAT1570 应用:
  Microphone Preamplifiers
  Digitally-Controlled Microphone Preamplifiers
  Differential Low-Noise Preamplifiers
  Differential Summing Amplifiers
  Differential Variable-Gain Amplifiers
  Moving-Coil Transducer Amplifiers
  Line Input Stages
  Audio
  Sonar