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Differential Operational Amplifier.
The operational amplifier (op- amp) is a highly efficient monolithic integrated circuit. An amplifier has an input port and an output port. In a linear amplifier, output signal = A * (time) input signal, where A is the amplification factor or gain (positive or negative number). The Op-Amp has a very high gain, high input impedance, and DC coupled difference amplifier with a low impedance single ended output. An ideal op-amp, by itself, is not a very useful device since any finite input signal would result in infinite output. By connecting external resistors around the ideal op-amp, we construct useful amplifier circuits. The basic differential amplifier, so named because the output signal is define as the difference voltage between the inputs. If desire, it multiply be certain amplitude. The kit should be powered via 9V battery. Simply connect the battery (+) poll to the VCC, and the negative poll (-) to the Ground (GND).
Note: Vin1 or Vin2 should be smaller then (VCC-VSS-0.4V)
Since the Op-Amp is not ideal the error can be adjust via adjustable gain trimmer (P1) Model A only.
The board gain function is define in the following formulas (model A):
When R2/R1 = R4/R3
RG = (P1 + RP1)
When R5 = R6 = RF; 2RF = R5 + R6
Gain = Vout/ (V1 - V2) = (1 + (RF)/(RG))(R2/R1)
For example model A: If R5 = R6 = R4 = R3 = R2 = R1 = 100K and RG = 2K the Gain = 101 (V1-V2)
Model A
The board function is define in the following formulas (model B):
G = Gain
Vout1 = G * (Vin1 - Vin2)
Model B Kit Includes model A
Kit Includes model B
Schematic
Model A
Model B
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Description and SKU# |
Price |
Picture |
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Differential OP-AMP (With Gain Adj.) Kit EID-K-OP-AMP-DIFF-A-ASM Fully assembled |
43.00 |
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EID-K-OP-AMP-DIFF-A-KIT Kit |
28.95 |
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EID-K-OP-AMP-DIFF-A-PCB PCB Only |
9.99 |
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Differential OP-AMP (Min. config.) Kit EID-K-OP-AMP-DIFF-B-ASM Fully assembled |
33.00 |
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EID-K-OP-AMP-DIFF-B-KIT Kit |
25.95 |
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EID-K-OP-AMP-DIFF-B-PCB PCB Only |
7.99 |
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