| Model | Low end frequency limit | High end frequency limit | Voltage Noise | C.M.R.R. | Dynamic Reserve | Min. Time Constant | Max. Time Constant |
| LI 5630 | 1.00 mHz | 100.00 kHz | 4.5 nV/vHz (typ.), 6 nV/vHz (max) | 120 dB (typ.) (at 1kHz) | 100 dB or greater | 10 usec | 30 ksec |
LI-570A | 10.00 Hz | 15.00 kHz | 25nV/vHz (typ. at 1kHz) | | 60dB (max) | 10msec | 30 sec | LI-575 | 500.00 mHz | 200.00 kHz | Less than 5nV/vHz (at 1kHz) | | Maximum 60dB | 1.25 msec | 125 sec | LI 5640 | 1.00 mHz | 100.00 kHz | 4.5 nV/vHz (typ.), 6 nV/vHz (max) | 120 dB (typ.) (at 1kHz) | 100 dB or greater | 10 usec | 30 ksec | 5610B | 500.00 mHz | 200.00 kHz | 5nV /vHz or lower (@ 1 kHz) | 110 dB or greater (at 1 kHz) | 110 dB max | 1 msec | 30 sec | 5600A | 500.00 mHz | 200.00 kHz | 5nV /vHz or lower (@ 1 kHz) | 110 dB or greater (at 1 kHz) | 110 dB max | 1 msec | 30 sec |