JTLB AD623 Voltage Amplifier Module, Adjustable Instrumentation Amplifier with Single Supply for Single Ended and Differential Micro Signal Amplification
AD623 is better than AD620 in practical use. AD623 can use single power supply, belonging to rail-to-rail operational amplifier, but the power supply range of AD623 (± 6v@) is much smaller than that of AD620(± 18v@), so AD623 is more suitable for integration in low-power and low-voltage applications.
Secondly, the internal bias of AD623 is indeed much smaller than that of AD620. When we actually debugged the module, we found that AD623 basically did not need to adjust the bias. The ac signal is basically symmetric relative to the point, but the AD620 needs to adjust the special bias circuit to eliminate the dc component and achieve the effect of point symmetry.
Finally, the bandwidth of AD623 is different from that of AD620, and the bandwidth of AD620 is slightly wider than that of AD623.
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