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High Precision Microvolt/Millivolt Voltage Amplifier Small Signal Instrumentation Amplifier AD620


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High precision microvolt / millivolt voltage amplifier small signal instrumentation amplifier AD620 transmitter    


  Using AD620 as the main amplifier, it can amplify microvolts and millivolts. Magnification . 1 .5 -1000 -fold, are adjustable. High accuracy, low offset, and better linearity. Adjustable zero to improve accuracy. Can be used for AC and DC model amplification.

  High precision, low offset , AC, DC microvolt, millivolt voltage amplifier, can be used for AC and DC small signal amplification, microvolt, millivolt voltage amplification. (The use of the module needs to have a certain electronic foundation. If there is no basic customer, please purchase carefully. Our store provides technical support.)

Product bright spot:

: Wide input range This product adopts AD620 amplifier, which can amplify microvolts and millivolts. It has higher amplification accuracy and better linearity than the LM358 on the market . The maximum voltage output range is ± 9V . 

: The amplification factor  uses a potentiometer to amplify the input signal. The amplification factor is up to 1000 times, and it can be adjusted by only one potentiometer.  

: Adjustable zero point The zero point can   be adjusted through the zero potentiometer to improve the accuracy, and there will be no zero point drift phenomenon to meet customer needs.

There is a negative pressure output module that uses a 7660A negative pressure chip to output negative pressure ( -Vin ), which can be provided to customers to drive other dual power loads.  


. 5 : the Mini -type size is 32 22 is mm , four weeks evenly distributed . 4 th 3mm positioning holes on both sides of the front row of 2.54mm standard spacing.      

Product parameters:

1. Input Voltage: . 3 . 11 the DC Batch can be customized )

2. Magnification: 1.5-1000 times adjustable, zero point adjustable

3. Signal input voltage: 100uV--300 mV

4. Signal output range: ± ( Vin-2V )

5. Negative pressure output:  greater than -Vin Due to the internal resistance of the negative pressure chip output, the actual output is greater than -Vin , the greater the load power, the greater the negative pressure drop.

6. Offset voltage:  50μV .
7. Input bias current:  1.0nA  (maximum value).

8. Common mode rejection ratio: 100dB

9. Offset voltage drift:  0.6μV/ ℃ (maximum). 10. Stable, time: 2μV/month maximum 

11. Module weight : 4g

12. Size : 32*22mm




Note: +S  signal input terminal , -S signal input negative terminal (can be connected to GND) , Vout signal output , V- output a - Vin voltage (for sensor power supply) . Signal input, signal output, power input, The 3 signals must be in common. 


Zero wiring diagram    prior to use according to the wiring diagram zero , + S and -S shorted, adjust the zero knob so that the output Vout is 0 V to  .

2. The single-ended input wiring diagram     This wiring diagram is for a signal, the sensor of the single-ended output silicon photovoltaic cells and the like .

 3. Differential input wiring diagram This wiring diagram is suitable for differential output pressure sensors, bridges and other sensors.    

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