Microchip Technology Incorporated · NASDAQ:MCHP

Microchip Technology — Technical Presentation (2020)

23 slides from Microchip Technology's technical presentation, Jul 30, 2020

  1. Slide 1: Opamp_PIC32MK Model Usage Guidelines

    Opamp_PIC32MK Model Usage Guidelines A Leading Provider of Smart, Connected and Secure Embedded Control Solutions DS70005431A

  2. Slide 2: General Info

    General Info • Model Name: Opamp_PIC32MK • Modelled to mimic the 100MHz Opamp from the PIC32MK class of devices. This is used in MCU32 90nm projects. • Matching of model with the device is done at the worst case corner. • Objective: Get an estimate on the Opamp performance, and understand the PCB ef

  3. Slide 3: Finding the model in Mindi

    Finding the model in Mindi J MPLAB Mindi Main Window File Edit View Simulator Place Probe Probe AC/Noise Hierarchy Monte Carlo Tools Help (2) > GK bed ct me Repeat Last Place. Fleer From Model Libra [add Drectory| From Symbol Libr Select by Specification Search Part. Hierarchy Create Model Magnetics

  4. Slide 4: Example Schematics

    Example Schematics AC, Transient Analysis 4

  5. Slide 5: Stability – Open Loop Response - Schematic

    Stability – Open Loop Response - Schematic 5

  6. Slide 6: Stability – Open Loop Response – Simulation Plot

    Stability – Open Loop Response – Simulation Plot 82.24dB 6

  7. Slide 7: AC – Closed Loop Response - Schematic

    AC – Closed Loop Response - Schematic Including 25pF input parasitic capacitance 7

  8. Slide 8: AC – Closed Loop Response – Simulation Plot

    AC – Closed Loop Response – Simulation Plot 6dB Rfb=Rsrc=300 ohms 8

  9. Slide 9: AC – Closed Loop Response- Component selection

    AC – Closed Loop Response- Component selection • The below table shows the Vout peaking for different resistor values, for Acl=2 and Cin=25pF. Parameter Rfb, Rsrc (ohms) 300 770 5k 10k Output Rfb=Rsrc=770 ohms Closed Loop Gain @ 10Hz (dB) 6.019 6.019 6.019 6.019 Vout peaking (dB) - 2.91 15.72 20.88

  10. Slide 10: Transient Analysis – Slew Rate - Schematic

    Transient Analysis – Slew Rate - Schematic 10

  11. Slide 11: Transient Analysis – Slew Rate – Simulation Plot

    Transient Analysis – Slew Rate – Simulation Plot SR Pos=64.37V/us SR Neg=66.1 V/us 11

  12. Slide 12: Transient Analysis – Slew Rate - Component selection

    Transient Analysis – Slew Rate - Component selection • The plots for different load caps are shown below: 100p 1n 100n 10n 12 Model output doesn’t converge for Cload of 100n.

  13. Slide 13: Transient Analysis – Slew Rate – Simulation Plot - Different I/P Period

    Transient Analysis – Slew Rate – Simulation Plot - Different I/P Period I/P Period: 1u I/P Period: 100n I/P Period: 50n 13

  14. Slide 14: Transient Analysis – Slew Rate – Simulation Plot - Different I/P Period

    Transient Analysis – Slew Rate – Simulation Plot - Different I/P Period I/P Period: 1u I/P Period: 100n I/P Period: 50n 14

  15. Slide 15: Transient Analysis – Slew Rate – Different Iload

    Transient Analysis – Slew Rate – Different Iload • The slew rate for different load current is tabulated below: 15

  16. Slide 16: Application Schematics

    Application Schematics 16

  17. Slide 17: 2nd order LP BWF - Schematic

    2nd order LP BWF - Schematic Parameter C (F) 10p 30p 1n 100n f=1/(2*pi*RC) R (Ohms) 15.92k 5.305k 159.2 1.592 Output Closed Loop Gain @ 10Hz (dB) 4.0102 4.0102 4.0102 4.0102 17 Vout 3dB BW (Hz) 964.92k 982.14k 994.32k 1.0052M

  18. Slide 18: 2nd order LPBWF – Simulation Plot - Different RC values (f:1MHz)

    2nd order LPBWF – Simulation Plot - Different RC values (f:1MHz) C:10p, R: 15.92K C:30p, R: 5.305K C:1n, R: 159.2 C:100n, R: 1.592 18

  19. Slide 19: Non-Inverting Amplifier - Schematic

    Non-Inverting Amplifier - Schematic 19

  20. Slide 20: Non-Inverting amplifier - Simulation Plot - Different R values (Acl=2)

    Non-Inverting amplifier - Simulation Plot - Different R values (Acl=2) Rsrc=Rfb=300 ohms 20 Rsrc=Rfb= 5K ohms Rsrc=Rfb= 10K ohms

  21. Slide 21: Inverting Amplifier - Schematic

    Inverting Amplifier - Schematic 21

  22. Slide 22: Inverting amplifier - Simulation Plot - Different R values (Acl=2)

    Inverting amplifier - Simulation Plot - Different R values (Acl=2) Rfb=2*Rsrc Rsrc=300 ohms 22 Rsrc= 5K ohms Rsrc= 10K ohms

  23. Slide 23: Limitations

    Limitations • The model is ideal and not affected by PVT variations. • The model is preliminary and doesn’t include common mode input range, output impedance, noise parameters etc. • Doesn’t support noise model. • CMRR and PSRR not modelled at higher frequencies. • Performance not guaranteed outside

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