| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | LMP7731 |  739Kb/18P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier |
 National Semiconductor ... | LMP7731 |  724Kb/ 20P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier |
 National Semiconductor ... | LMP7731MA |  739Kb/ 18P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier |
 National Semiconductor ... | LMP7731MAX |  739Kb/ 18P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier |
 National Semiconductor ... | LMP7731MF |  709Kb/ 20P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO, Operational Amplifier |
| LMP7731MF |  739Kb/ 18P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier |
 National Semiconductor ... | LMP7731MFE |  739Kb/ 18P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO Amplifier |
 National Semiconductor ... | LMP7731MFX |  709Kb/ 20P | 2.9 nV/sqrt(Hz) Low Noise, Precision, RRIO, Operational Amplifier |