Power Rail Noise Analyzer Reference Design
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Key Document


This reference design is an active pass-band filter connected to the analog-to-digital converter (ADC) in a C2000™ microcontroller (MCU). The system senses ripple and noise on the power rail in the band of interest. The Fast-Fourier Transformation (FFT) algorithm analyzes harmonic content of the signal and allows for switching frequency detection. The analysis enables for adaptive real-time switching frequency dithering in high-power applications and better electromagnetic compatibility interference (EMI) control. Alternatively, ripple counters in feedback-less positioners can benefit the design.

Digital Signal Processing (DSP) features of C2000™ microcontrollers play an important role in the system and enable digital-power (on-board chargers, DC-DC converters) and motor control (traction inverters) applications to become smarter and more efficient.

  • Multiple Feedback Filter (MFB) topology
  • Single-supply power
  • Example Firmware for TMS320F28069M C2000

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Schematic/Block Diagram

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA365-Q1  Automotive 2.2V, 50MHz, Low-Noise, Single-Supply Rail-to-Rail Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy Not Available
TMS320F28069M  Piccolo™ 32-bit MCU with 90 MHz, FPU, VCU, 256 KB Flash, CLA, InstaSPIN-MOTION  Microcontrollers (MCU)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA365-Q1 Download Download
TMS320F28069M Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1000 19 Jun 2018
Design files (6)
Title Type Size (KB) Date
ZIP 439 19 Jun 2018
ZIP 436 19 Jun 2018
PDF 379 19 Jun 2018
PDF 87 19 Jun 2018
PDF 55 19 Jun 2018
PDF 125 19 Jun 2018
Related Tools & Software

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
C2000 Piccolo MCU F28069M LaunchPad™ development kit  LAUNCHXL-F28069M  Evaluation Modules & Boards 

Software (1)

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