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Questions tagged [resolution]

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What is the real resolution of my voltage measurement when I use only some of the range of of the ADCchannel

I have a 16 bit ADC, I use the +/1 V range, differential channel. If I used the full range of the ADC to provide full resolution (I am aware non-linearity and noise may affect this) this calculates as:...
PauloHughes's user avatar
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1 answer
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Code transition glitches in an ideal DAC

I have read in most books and articles that a code-to-code glitch is caused by imperfect timing in the switching of bits into a DAC. If that was true, then there should be no glitch when you use an ...
Borenstein Boar's user avatar
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1 answer
336 views

Resolution versus sensitivity of a multimeter

I am trying to understand the difference between resolution and sensitivity. After searching on the internet and the youtube I found more or less the below definition, but in practice I can't ...
DarkKnight's user avatar
1 vote
1 answer
152 views

Are there monochrome camera sensors with more than 16 bit depth per pixel?

Some camera use cases (like exoplanet transit photometry) require measuring smaller variations in brightness across an image and over time than the bit depth resolution in 16 bit monochrome cameras ...
2080's user avatar
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2 answers
120 views

ADC Oversampling New Resolution

I am using an ADC LTC2378 with a resolution of 20 bits. Based on the datasheet this resolution corresponds to an LSB calculated by the equation (\$2 V_{\text{ref}}/2^{20}\$), i.e., 9.536 µV. In order ...
MrT's user avatar
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1 answer
98 views

PWM DAC, dividing the 8 bit PWM DAC in 2 four bit PWM DAC [closed]

Can anybody explain what the purpose is of dividing an 8 bit DAC using PWM in two 4 bits DAC and how is it made possible the scaling of PWMH and PWML and how do they affect in total uncertainty. https:...
Fc3 Fc3's user avatar
2 votes
1 answer
61 views

Melexis MLX90395 sensor resolution

I have a Melexis MLX90395 Hall magnetic field sensor, whose datasheet says that the sensitivity is 2.5 uT/LSB. My question is, does this mean that the resolution, i.e. the minimum value of the ...
Alejandro's user avatar
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1 answer
241 views

DC offset to an ADC reduces dynamic range which reduces accuracy. How to quantify accuracy due to loss of dynamic range?

It’s understood that the dynamic range of the ADC should match the max amplitude of the signal to achieve maximum accuracy. If it doesn’t, you lose digital codes which reduces accuracy. How can one ...
Efanatic's user avatar
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1 answer
110 views

Is it okay to split the same net to sample an analog signal in two ADCs?

I have an analog signal that comes from another place with a range of 0-1 V, the required resolution should be 10 bit. I want to sample the same signal in two ADCs, the internal ADC of the STM32, and ...
Knowledge's user avatar
  • 443
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2 answers
41 views

Sensors data-sheet is unclear about resolution of readings

This sensor states that its lower detectable limit is 1ppm yet its resolution is 0.1ppm. What is the difference between resolution and lower-detectable limit? I thought resolution was the smallest ...
Sanchez2009's user avatar
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4 answers
512 views

ADC resolution impact with voltage divider

I have a sensor that outputs a signal change between -4 to 4 V. I want to use a bipolar ADC with a 3.3 V reference. I know that I should use a voltage divider, but what is the impact on resolution? I ...
Knowledge's user avatar
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0 answers
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STM32H745XI graphical display

I am planning to interface an STM32H745XI to a 1400x480 display. The maximum resolution given for the STM is 480×480. I understand that this is the maximum frequency the device can actually output. ...
Pooja Madival's user avatar
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2 answers
206 views

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 ...
Shannon's user avatar
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3 answers
197 views

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 ...
Shannon's user avatar
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4 votes
2 answers
168 views

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 ...
Anice41's user avatar
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2 answers
223 views

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/(...
Shannon's user avatar
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1 vote
0 answers
209 views

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 ...
Curiousmarble's user avatar
-2 votes
1 answer
159 views

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 ...
Curiousmarble's user avatar
0 votes
1 answer
1k 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 ...
BetweenBeltSizes95's user avatar
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2 answers
778 views

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 ...
Zorglub29's user avatar
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1 answer
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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 ...
sehan2's user avatar
  • 103
1 vote
1 answer
194 views

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 ...
Rabobsel's user avatar
1 vote
2 answers
749 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/...
loulou's user avatar
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0 votes
3 answers
6k views

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 ...
Basit Ali's user avatar
2 votes
1 answer
562 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 ...
Basit Ali's user avatar
4 votes
1 answer
252 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 ...
Tulmandil's user avatar
1 vote
2 answers
99 views

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 ...
fatemeh katibeh's user avatar
0 votes
1 answer
621 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-...
haresfur's user avatar
  • 269
6 votes
2 answers
2k views

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 ...
KMC's user avatar
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0 votes
2 answers
532 views

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 ...
abomin3v3l's user avatar
7 votes
4 answers
1k 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 below: I think that in the equation above, N is not an integer but floating-...
A.R.S.D.'s user avatar
  • 183
0 votes
1 answer
320 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 ...
Cinn's user avatar
  • 145
4 votes
4 answers
456 views

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 ...
ty_1917's user avatar
  • 1,016
5 votes
3 answers
8k views

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 ...
ElectronSurf's user avatar
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0 votes
1 answer
63 views

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 ...
pnatk's user avatar
  • 1,468
2 votes
2 answers
653 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 ...
Valentin Richard's user avatar
1 vote
1 answer
122 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, ...
Kinka-Byo's user avatar
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1 vote
1 answer
927 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 ...
Tom L.'s user avatar
  • 8,089
17 votes
6 answers
9k views

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 ...
voltage_drop's user avatar
1 vote
1 answer
374 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 ...
Amir's user avatar
  • 59
1 vote
3 answers
1k 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 ...
user1245's user avatar
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1 vote
1 answer
2k 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 ...
Mohsen's user avatar
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7 votes
3 answers
784 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 ...
user222401's user avatar
12 votes
6 answers
3k 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 ...
user1245's user avatar
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0 votes
1 answer
96 views

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 ...
user1999's user avatar
  • 1,505
2 votes
1 answer
182 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 ...
pnatk's user avatar
  • 1,468
3 votes
2 answers
701 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 ...
user16307's user avatar
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0 answers
24 views

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. (...
Blackwidow's user avatar
1 vote
2 answers
301 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 ...
user1999's user avatar
  • 1,505
4 votes
4 answers
706 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 ...
pnatk's user avatar
  • 1,468