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 Guide

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Design Files

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Bill of Materials (BOM)

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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  C2000 real-time control MCUs  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 Abstract Type Size (KB) Date Views TI Recommends
PDF 1000 19 Jun 2018 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 439 19 Jun 2018 0
ZIP 436 19 Jun 2018 0
PDF 379 19 Jun 2018 0
PDF 87 19 Jun 2018 0
PDF 55 19 Jun 2018 0
PDF 125 19 Jun 2018 0
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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