SBOU192 July   2017

 

  1.   DIYAMP-SC70-EVM
    1.     Trademarks
    2. 1 Introduction
      1. 1.1 DIYAMP-SC70-EVM Kit Contents
      2. 1.2 EVM Features
      3. 1.3 List of Circuits on the EVM
    3. 2 Hardware Setup
      1. 2.1 EVM Circuit Locations
      2. 2.2 EVM Assembly Instructions
    4. 3 Schematic and PCB Layout
      1. 3.1  Schematic PCB Drawing
      2. 3.2  Single-Supply, Multiple Feedback Filter
      3. 3.3  Single-Supply, Sallen-Key Filter
      4. 3.4  Single-Supply, Non-Inverting Amplifier
      5. 3.5  Single-Supply, Inverting Amplifier
      6. 3.6  Difference Amplifier
      7. 3.7  Dual-Supply, Multiple Feedback Filter
      8. 3.8  Dual-Supply, Sallen-Key Filter
      9. 3.9  Inverting Comparator
      10. 3.10 Non-Inverting Comparator
      11. 3.11 Riso With Dual Feedback
      12. 3.12 Dual-Supply, Non-Inverting Amplifier
      13. 3.13 Dual-Supply, Inverting Amplifier
    5. 4 Connections
      1. 4.1 Inputs and Outputs
      2. 4.2 Power
      3. 4.3 Enable and Disable Feature
    6. 5 Bill of Materials and Reference
      1. 5.1 Bill of Materials
      2. 5.2 Reference

3.12 Dual-Supply, Non-Inverting Amplifier

Figure 40 shows the schematic for the dual-supply, non-inverting amplifier circuit configuration.

diyamp_nfig40_DS_noninvert_amp_sch.pngFigure 40. Dual-Supply, Non-Inverting Amplifier Schematic

The non-inverting op-amp configuration takes an input signal that is applied directly to the high impedance non-inverting input terminal and outputs a signal that is the same polarity as the input signal. The load resistance for this topology is the sum of R1 and R2. The values of the resistors in the feedback network will determine the amount of gain to amplify the input signal.

Equation 26 displays the transfer function of the dual-supply, non-inverting amplifier circuit configuration shown in Figure 40.

Equation 26. nneq27_sbou162.gif

Capacitor C3 provides the option to filter the output. The cutoff frequency of the filter can be calculated using Equation 27.

Equation 27. nneq28_sbou162.gif

The PCB layout of the top layer of the dual-supply, non-inverting amplifier circuit configuration is displayed in Figure 41

diyamp_nfig41_ds_non-inv_top.pngFigure 41. Dual-Supply, Non-Inverting Amplifier Top Layer

The PCB layout of the bottom layer of the dual-supply, non-inverting amplifier circuit configuration is displayed in Figure 42.

diyamp_nfig42_ds_non-inv_bottom.pngFigure 42. Dual-Supply, Non-Inverting Amplifier Bottom Layer