[LPC5536] OPAMP Performance Test

[#1]

Contents

1.     Introduction to OPAMP. ........................................1
2.     Usage of LPC5536-OPAMP. ................................2

2.1 Follower OPAMP. .................................................2

2.2 Non-inverting OPAMP. .........................................3

2.3 Differential OPAMP. ..............................................3

3.     Test Preparation of LPC5536-EVK. ......................4
4.     Test Result ............................................................5

4.1      Follower Test ....................................................6

4.2      Non-inverting Test ............................................7

4.2.1 Error Analysis. ...................................................7

4.2.2 Gain Error and Output Offset Error ...................8

4.2.3 OPAMP Output Error .........................................9

4.4 Differential Test ...................................................10

5.     Conclusion. .........................................................11

The Article shows the OPAMP performance test that the precision of LPC5536-OPAMP matches the description in the product data sheet. The gain error is less than 5%, and the input offset voltage is less than 5mV, which can meet the presicion need to a certain extent. It is worth mentioning that the output error of LPC5536-OPAMP is very small at low magnification. For example, the full-range error is just single-digit mV at the magnifications of 2X and 5X in non-inverting mode. For scenarios requiring higher precision, users can connect the external high-precision resistors to achieve higher output precision. 

The article includes detailed test steps and EVK board settings.

For detail, see attached article.