SBOA437A October   2020  – February 2023 INA1620 , INA592 , INA597 , OPA191 , OPA192 , OPA196 , OPA197 , OPA310 , OPA990

 

  1.   Abstract
  2.   Trademarks
  3. 1Discrete Improved Howland Current Pump – Design 1
  4. 2Discrete Improved Howland Current Pump With Buffer – Design 2
  5. 3Integrated Improved Howland Current Pump - INA592 and Buffer – Design 3
  6. 4Integrated Improved Howland Current Pump - INA592 and Settable Gain – Design 4
  7. 5Design Needs and Considerations
  8. 6Operational Amplifier Considerations
  9. 7References
  10. 8Revision History

6 Operational Amplifier Considerations

#GUID-6B6BEA90-F642-4554-9CAF-D28701F0EDDA/GUID-BA560C76-B3DC-47F6-93DD-A93477F32A92 lists the operational amplifier considerations. #GUID-6B6BEA90-F642-4554-9CAF-D28701F0EDDA/GUID-89973A85-23EE-4AFC-8D66-CC5BFEC0F9D6 details the integrated difference amplifier considerations.

Table 6-1 Operational Amplifier Considerations
Part Number Specifications
OPA310 High Output Current Op Amp (1.5 V to 5.5 V)

Rail-to-rail input and output (RRIO), ±150-mA output short circuit current at 5.5 V, ±250-µV offset (±1.3-mV max), low 16 nV / √Hz noise at 1 kHz
OPA192 Precision Op Amp RRIO, low ±5-µV offset (±25-µV max), low 5.5 nV / √Hz noise at 1 kHz
OPA191 Precision Low-Power Op Amp

RRIO, low ±5-µV offset (±25-µV max), low 15 nV / √Hz noise at 1 kHz
OPA197 Precision Op Amp (for cost-optimized designs) RRIO, low ±25-µV offset (±100-µV max), low 5.5 nV / √Hz noise at 1 kHz
OPA196 Precision Low-Power Op Amp (for cost-optimized designs) RRIO, low ±25-µV offset (±100-µV max), low 15 nV / √Hz noise at 1 kHz
OPA990 General Purpose Op Amp RRIO, ±300-µV offset (±1.5-mV max), low 30 nV / √Hz noise at 1 kHz
Table 6-2 Integrated Difference Amplifier Considerations
Part Number Specifications
INA592 Precision Op Amp RRIO, low ±14-µV offset (±40-µV max), low 18 nV / √Hz noise at 1 kHz (G = ½)
INA597 Precision Op Amp (for cost optimized designs) RRIO, low ±14-µV offset (±200-µV max), low 18 nV / √Hz noise at 1 kHz (G = ½)
INA1620 Op Amp with integrated precision resistors ±100-µV offset (±1-mV max), Ultra-low 2.8 / √Hz noise at 1 kHz