Questions tagged [resolution]

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How to measure bit resolution

I have a system that has a bit resolution of 1.9uV (gain 20), to increase the bit resolution the gain stage was increased at the input of 180V/V which lowers the effective bit resolution to 0.21uV. I ...
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Mapping different resolution ADC to DAC

I have a 24-bit ADC that is controlled by an FPGA. I want to take the ADC input and output it from a 16-bit DAC that is also controlled by the FPGA. Do I simply ignore the 8 LSB bits of the data and ...
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Time domain reflectometry and resolution

Regarding the temporal (and consequently spatial) resolution of a TDR system, I've read from different sources that the maximum resolution achievable is half of the rising time of the input step ...
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ADC bit resolution (LSB) after a gain stage

If my signal path is as the following: My input DR is 20mVpp and goes through the above path, and the ADC used is 16 bits. Would the LSB be 5V/(2^16)=76uV or the gain will be added to the LSB as (5V/(...
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Transparent displays that allow UV light/sunlight to pass through them?

Is there a type of digital display that can work to let sun through it, so that the dark pixels block the UV, and transparent pixels let the UV through? I'm aware of monochrome LCDs for a resin ...
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Digital to analog in an old 35mm film recorder [closed]

I'm looking at an old film recorder from 1985, the Polaroid Freeze Frame, the back of the machine pictured here: From here: https://www.radiomuseum.org/r/polaroidco_freezeframe_video_recorder.html I ...
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1 answer
300 views

Did I calculate my force sensor resolution correctly?

I am trying to calculate the resolution of my simple force sensor system in Newton [N]. The sensor system consists of a simple voltage divider, where the voltage across the FSR is measured by an 8-bit ...
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Understanding the resolution of the DS18B20 - mismatch between specs?

I am interested in the DS18B20 temperature sensor from Maxim Integrated. The datasheet is here: https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf The datasheet mentions: "Measures ...
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How do I compute the angular resolution of a radar system?

I hope this is the right place to ask a radar related question, otherwise I would be grateful for a pointer to the correct forum. I want to compute the angular resolution of a radar system but so far ...
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DDS - find optimal size for LUT, PHACC and sampling freq for application

I had the following question. About the topic of DDS you can find a bunch of information on the net and i think i understood the basics relatively well. You use a lookup-table with stored values of ...
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280 views

ADS1115 differential measurements - resolution limited to 12 bits instead of 16 bits

I am trying to read a differential voltage with an ADS1115 (https://www.amazon.fr/gp/product/B07RJT3GHC/) hooked up to a Teensy 4.1. I am using Adafruit_ADS1015 library (https://github.com/adafruit/...
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Maximum sampling frequency of Arduino (internal vs external ADC)

I am studying the Arduino ADC. I learned that the maximum sampling frequency of the Arduino ADC ( e.g. Due) is 1M sample per second. As the Arduino ADC has only a 12-bit resolution I must use an ...
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2 votes
1 answer
136 views

External ADC with Arduino

I am studying Arduino ADC and I have not much background in micro-controllers. Excuse me if this question is too basic. I found that people use external ADC for better resolution as compared to the ...
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4 votes
1 answer
151 views

Voltmeter resolution increase by having several in series

The problem I am trying to measure quite precisely a voltage around 7.2V on a line of a PCB with a voltmeter. In this voltage range, my voltmeter only displays 3 digits. So the reading is something ...
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1 vote
2 answers
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How can I choose an absolute encoder with appropriate resolution?

I have a motor that runs between 3 to 3000 RPM. The drive update time is 2.2 micro seconds. What is appropriate an encoder resolution for this work (especially for lower speeds) so the drive could ...
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1 answer
261 views

How do I convert ADC single-ended output back to voltage (ADS1115)?

I am evaluating some ADCs for my project and am trying to understand the operation of Adafruit's ADS1115 16 bit ADC (https://learn.adafruit.com/adafruit-4-channel-adc-breakouts/downloads) in single-...
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What does 0.5lsb and 1.5lsb mean in ADC

Quoted from the ebook Introduction to Microcontroller by Gunther Gridling (pg. 43): The class width of most classes corresponds to 1 lsb, with the exceptions of the first class (0.5 lsb) and the last ...
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10-bit ADC resolution doubt - 1023 or 1024? ESP8266

I am working with ESP8266 which has a single ADC channel with 10bits and 1V reference. What is the correct resolution in mV/ADC result? 1000mV/1023 or 1000mV/1024? Also, I wonder if the reference of ...
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5 votes
3 answers
679 views

Ambiguity in ADC conversion of analog voltage to digital value

I have question about the common formula used to turn analog input voltage of ADC into an integer binary number that is as bellow : I think that in the equation above N is not integer but floating-...
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1 answer
195 views

Can I "sum" internal ADC channels to achieve extra bits resolution?

First of all I am a newbie in electronics. I am building some weight scale applications using (as seen everywhere) load cells wired to a HX711 ADC and a ESP8266. I am now giving a try to the Texas ...
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4 answers
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Confused with the effect number of decimals at the output of transducer

There is an ultrasonic device which measures and outputs both wind speed and direction and has a very long manual. But to keep it short and summarize, the accuracy and the resolution for the wind ...
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Resolution of potentiometer

I'm a bit confused about the resolution of a potentiometer as a voltage divider. What's the relation between voltage and number of turns in a pot? For example In below circuit: What the resolution ...
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What parameter of this sensor necessary to decide about the required ADC resolution?

From the datasheet of this accelerometer, I need to decide about the adequate ADC resolution. If my reasoning is not wrong the output noise floor of this accelerometer will decide the adequate ADC ...
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2 votes
2 answers
326 views

SMPS controller duty cycle resolution

when reading the datasheet for some SMPS controllers like the lm25116, I can see that they operates around 1MHz, but nowhere we can find their duty cycle resolution: 8bits, 12bits, 16bits ? So I'm ...
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1 vote
1 answer
104 views

A/D conversion improvement through Arduino

I have a certain analog signal v(t) which varies from 0 to 2V, which I want to be read by Arduino. I know that Arduino can read it through the function AnalogRead, ...
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1 vote
1 answer
584 views

STM32 LTDC - Maximum resolution

I am planning to interface a STM32H753XI to a 1400x480 display. Here is the reference manual. Now, the maximum resolution given for the STM is 1024x728. I understand that this is the maximum frequency ...
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15 votes
5 answers
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Why isn't there any 9.5 digit multimeter or higher?

Why can't you buy a 91⁄2-digit multimeter? Isn't there any need for it? Is a 81⁄2-digit multimeter the latest high end you can buy? I have tried Keysight, Keithley, and Fluke, but there is nothing ...
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1 vote
1 answer
215 views

STM32CubeMX not showing the resolution in ADC

I am trying to use ADC in stm32f103 micro-controller. I use STM32CubeMX to configure the ADC. Based on the videos I gave seen on YouTube, I must be able to configure the resolution of the ADC (8, 12 ...
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3 answers
440 views

Terminology confusion with sensitivity used with gain

For force transducers like strain gauges, the resolution is the smallest change in the load that represents a change in the output value of the measured force and moment. The smaller the resolution of ...
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1 vote
1 answer
1k views

Measure sensitivity of ADC

I would like to benchmark my ADC. I can calculate a sensitivity value based on the information in the datasheet. However, I would like to measure/benchmark this figure. Is there a standard method ...
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3 answers
665 views

resolution bandwidth

I have the following trivial question: I have acquired a noise spectrum with a resolution bandwidth of \$124\mathrm{Hz}\$. I would like to convert it to \$\mathrm{V/\sqrt{Hz}}\$. Shall I simply ...
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10 votes
6 answers
2k views

Would reducing the reference voltage of an ADC have any effect on accuracy?

Regarding the following information taken from a paper: The paragraph is telling about what happens when the ADC Vref is reduced. There is the statement from the above quote: Note that if you ...
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Confusion with mapping a transducer range to a different output voltage range

A pressure transducer with a range +/-200Pa has both serial and analog outputs. I'm only interested in positive pressure besides sometimes the negative pressure needed to be measured when there is ...
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2 votes
1 answer
114 views

External signal noise versus ADC resolution

One of the answers in this question says: “Having an ADC that has better resolution than the external signal noise is a waste of money.” I want to illustrate and understand what is meant here. So ...
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3 votes
2 answers
375 views

Will noise floor dominate the ADC resolution?

A 16-bit data acquisition board input range can be set to various ranges like +/-10V or +/-0.5V ect. If our input signal’s range is +/-0.3V with a noise floor of 1mV does it make sense to set the ...
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sampling rate and bit resolution for Scanning Probe Microscopy

I am trying to compare two products and see which one offers higher performance in terms of sampling rate and bit resolution. Below are the specs I was able to gather from product1 and product 2. (...
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1 vote
2 answers
208 views

What is meant by counts of noise in this context?

Regarding the following paragraph about resolution of a 16-bit ADC: Unfortunately, other factors enter the equation to diminish the theoretical number of bits that can be used, such as noise. A ...
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4 votes
4 answers
659 views

What sets the resolution of an analog resistive sensor?

When I read about film or silicon strain gauges their data-sheets mentions about their resolution. But in analog world what sets the resolution? For example if you vary a potentiometer the output ...
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0 votes
1 answer
191 views

Multimeter temperature coefficient - Specified accuracy

I want to calculate the temperature coefficient for a digital multimeter. The datasheet I read it is calculated as: 0.1*(specified accuracy)/°C (<18°C or >28°C) Do you know what specified ...
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2 answers
131 views

A question about the working principle of a frequency to voltage converter

This is a question about the big picture of a frequency to voltage converter. For example when I use this Phoenix Contact MINI MCR-2-F-UI(-PT) f/V converter module with the settings to map a input ...
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1 vote
4 answers
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A question about 16 bit ADC representation [duplicate]

For a 16 bit ADC with a -10V to +10V analog input range I have read the following: The resolution \$ \text{delta} = \dfrac{20V}{2^{16}} \$ 16 bit 0000000000000000 corresponds to decimal 0 and this ...
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2 answers
393 views

Confusion with ADC resolution FFT and programming tools

I have a signed 16 bit ADC which means it maps -10V to +10V range to 16 bit. So the max voltage +10V is 2^15-1 = 32767; zero is 0; and -10V is -2^15 = -32768. My confusion is that when I perform data-...
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1 vote
1 answer
107 views

Dictionary: is PWM precision the same of PWM resolution?

I have an issue in identifying the meaning of PWM precision. I've always talked about PWM resolution, and to me seems to be 1/2^(n-1). Is the precision of the PWM just prequency precision? Or is the ...
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2 answers
503 views

Resolution enhancement for a 2wire PT100 setup with ADC and no external amplification

I'm working on a PT100 based temperature probe sensor to read temperature difference between two points inside a pipe with flowing water, the requierements are: 1mK resolution over 0-45C range. dual ...
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0 votes
1 answer
116 views

Voltage range limitations on ADC

I'm designing an amplification stage using an MCP6021 op-amp operating from 0 to 5V. I managed to tune the circuit so I get 515.646mV to 4.878 V but I could get like 4.99V if tuned the gain a bit more....
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3 votes
3 answers
343 views

Precision of ADC

While I was studying for my exam I saw this question where he's given me a bunch of ADCs asking me which would work and which wouldn't He's given me the Minimum required Precision for the ADC and I ...
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310 views

Passive summing of two PWM signals

I want to sum/mix 2 PWM signals in order to reach a better resolution on a DAC (see here or here). I need help to understand the limitations of a simple resistors network to sum my two signals as ...
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2 answers
1k views

DAC: Vcc or Vref determine resolution?

Does the resolution of a DAC depend on the supply voltage or on the reference voltage? How would the possible voltage levels be calculated if we have, for example, a DAC with Vcc = 5V, Vref = 0.5V and ...
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2 votes
4 answers
714 views

Can an electronic device continuously sweep the voltage?

Modern power supplies can sweep the potential in a given range with a specific rate. I am curious if the electronic devices can continuously sweep the voltage (in a perfect sense) or it is just step-...
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640 views

Converting ADC to voltage

How can I convert the binary data to voltage: where each sample stored as 2-bytes(16-bit signed integer); and the resolution of the ADC is 14-bit with -10V to 10V range? I tried the following which ...
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