Noise Estimating Calculators

Calculators for Estimating Noise Amplitudes & Selecting the Best Data Converter

Renesas' Thermal Noise Calculator (TNC) and Effective Number of Bits (ENOB) Calculator help analyze noise that is present in semiconductor devices as well as noise due to signal processing in data converters.

Using the calculators, you can enter or find all parameters. The calculators also offer indication of consistent parameters, validation to prevent illegal entries, and import, export and graphing functionality.

System Requirements

  • Windows® 7 or Windows® 8
  • File Size: 30MB

Thermal Noise Calculator

The Thermal Noise Calculator aids in the analysis of thermal noise found in resistors and other noise sources. The TNC finds the noise voltage generated by any device if the white noise spectral density and 1/f corner frequency are known.

Thermal Noise Calculator

Parameters

  • Noise Voltage, Vn, in μVpp or μVrms
  • White Noise Spectral Density, ND, in nV/√Hz
  • Johnson Resistance, R, in Ω
  • Temperature, T, in °C
  • Upper Frequency, Fh, in Hz
  • Lower Frequency, Fl, in Hz
  • 1/f Corner Frequency, Fc, in Hz

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Effective Number of Bits Calculator

ENOB is an AC specification and is synonymous with Signal to Noise and Distortion. The ENOB Calculator aids in the design and analysis of data converter application circuits. It calculates the effective number of bits of an ideal data converter.

Effective Number of Bits Calculator

Parameters

  • Effective Number of Bits, ENOB, in bits
  • Signal to Noise and Distortion, SINAD, in dB
  • Resolution, N, in bits
  • Bandwidth, BW, in % of the Nyquist frequency, or Over Sample Ratio, OSR, as a multiple of the sample frequency
  • Average Differential Nonlinearity, DNL, in LSB
  • Clock Jitter, Tj, in PPMrms of the clock period
  • Analog Referred Noise, Vn, in LSBrms
  • Total Harmonic Distortion, THD, in % or dB

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38:09
Learn how noise affects the performance of the signal chain and how to use Renesas tools to help analyze internal sources of noise.
38:09
Learn how noise affects the performance of the signal chain and how to use Renesas tools to help analyze internal sources of noise.
38:09
Learn how noise affects the performance of the signal chain and how to use Renesas tools to help analyze internal sources of noise.

 Understanding Noise in the Signal Chain

By understanding noise issues in your designs, you can identify Renesas products that can reduce noise and improve performance.

In this on-demand webinar you'll learn 3 things:

  1. What noise is and how it's specified at the component level
  2. How this noise affects the performance of a signal chain
  3. How to select components based on signal chain requirements

Don't have time to watch the webinar?

Download the Slides

Explore Renesas' portfolio of data converters featuring analog-to-digital converters (ADC), digital-to-analog converters (DAC), and voltage references.

Learn more about data converters