OPA124UA TI (德州仪器) 运算放大器

FEATURESlLOW NOISE: 6nV/√Hz (10kHz)lLOW BIAS CURRENT: 1pA maxlLOW OFFSET: 250μV maxlLOW DRIFT: 2μV/°C maxlHIGH OPEN-LOOP GAIN: 120dB minlHIGH COMMON-MODE REJECTION:100dB minlAVAILABLE IN 8-PIN PLASTIC DIPAND 8-PIN SOIC PACKAGESAPPLICATIONSlPRECISION PHOTODIODE PREAMPlMEDICAL EQUIPMENTlOPTOELECTRONICSlDATA ACQUISITIONlTEST EQUIPMENTOPA124DESCRIPTIONThe  OPA124  is  a  precision  monolithic  FET  opera-tional  amplifier  using  a  Difet  (dielectrical  isolation)manufacturing process. Outstanding DC and AC per-formance  characteristics  allow  its  use  in  the  mostcritical  instrumentation  applications.Bias  current,  noise,  voltage  offset,  drift,  open-loopgain,  common-mode  rejection  and  power  supply  re-jection are superior to BIFET and CMOS amplifiers.Difet  fabrication  achieves  extremely  low  input  biascurrents  without  compromising  input  voltage  noiseperformance.  Low  input  bias  current  is  maintainedover  a  wide  input  common-mode  voltage  range  withunique  cascode  circuitry.  This  cascode  design  alsoallows high precision input specifications and reducedsusceptibility to flicker noise. Laser trimming of thin-film  resistors  gives  very  low  offset  and  drift.Compared to the popular OPA111, the OPA124 givescomparable  performance  and  is  available  in  an  8-pinPDIP  and  8-pin  SOIC  package