Feature:

1. Exquisite module, excellent magnification performance.
2. The weak signal detection effect is good.
3. 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@max) is much smaller than that of AD620(± 18v@max), so AD623 is more suitable for integration in low-power and low-voltage applications.
4. 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.
5. Finally, the bandwidth of AD623 is different from that of AD620, and the bandwidth of AD620 is slightly wider than that of AD623.

Specification:

Module features: the AD620 is a low-cost, high- instrument amplifier that requires only an external resistor to set the gain, which ranges from 1 to 10000. This module can be enlarged 1000 times, with neat circuit layout, MINI, reasonable design layout and wiring, generous materials, suitable for project development and student competition. Our latest AD620 is two, for a fixed gain version (with metal shielding cover), another for adjustable gain version (without metal shielding cover), the two have a fixed voltage output all the way, our shop in order to meet customer demand, sliding variable in the shipment without welding, but with shielding cover + sliding variable, the user can choose according to their own needs.

Application Suggestions: 1, this module is suitable for more than hundred microvolt signal amplifier, in addition it is important to note that although the official manual gives the largest magnification is 10000 times, but the actual use and cannot the value, the different frequency and the size of the input signal amplification effect may be different from the actual magnification to the influence of the gain bandwidth product and supply voltage, the op-amp does not exceed the maximum output of the power supply voltage.

2. The gain bandwidth product of the amplifier (specified as GBWP, GBW, GBP or GB) is the product of the amplifier bandwidth and the gain of the bandwidth, and is a parameter used to simply measure the performance of the amplifier. When the frequency is large enough, the gain bandwidth product is a constant. For example, the gain bandwidth product of AD623 is 800KHz, which means that when the frequency is 800KHz, the gain of the device drops to the unit gain. So A is equal to 1. It also shows that the amplifier can operate at a maximum frequency of 800KHz without distorting the input signal. Since the gain times the frequency is determined, the same device can only operate at a maximum frequency of 80 kHz when a gain of 10 is required.

Package List:

1x  Voltage Amplifier Module