Questions tagged [resolution]

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36 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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3answers
51 views

Terminology confusion with sensitivity used with gain

Regarding force transducers like strain gauges, the resolution is the smallest change in the load that represents a change in the output values of the measured forces and moments. The smaller the ...
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1answer
37 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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3answers
473 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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6answers
1k 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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1answer
34 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 ...
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1answer
63 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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1answer
71 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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0answers
20 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. (...
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2answers
53 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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4answers
629 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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26 views

Strain Gauge Resolution

I have a torque strain gauge that is attached to a differential amplifier and then a non-inverting amplifier which connected to a myDAQ and I was wondering how to find the resolution of the system. ...
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1answer
59 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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2answers
58 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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4answers
729 views

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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1answer
55 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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1answer
83 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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1answer
172 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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1answer
81 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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3answers
219 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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144 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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2answers
387 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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4answers
661 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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1answer
120 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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2answers
1k views

Accuracy error of ammeter from specification : is it really just a constant offset?

On ammeter specifications it is often written accuracy specification $$ (....\% rdg+ ... digits) $$ While the ammeter can have a certain last digit on the screen, which determine the resolution if ...
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3answers
744 views

Op-Amp Resolution

How to calculate resolution of op-amp? What is the minimum variation required in input voltage for output voltage to vary?In my application the op-amp is connected as an integrator whose positive ...
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1answer
367 views

why resolution lower than accuracy

Regards, I've seen a few sensors which its datasheet claims to have a better resolution than the mean accuracy. I understand resolution as the lower identifiable value of the measurement; and, as ...
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2answers
4k views

What's the difference between sensitivity and resolution of an SMU?

In Keithley's Low Level Measurements Handbook, 7th ed the two terms are defined as: SENSITIVITY - the smallest change in the signal that can be detected. RESOLUTION - the smallest portion of ...
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2answers
502 views

What is meant by 8-bit resolution on the AD8802's PWM input?

I am using a PCA9685 (outputs 12bit PWM) to control an LED driver, AP8802. The LED driver datasheet states (on page 11, paragraph 2): A Pulse Width Modulated (PWM) signal with a max resolution of 8-...
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1answer
38 views

Optimal filter for different resolution measurements

I will try to be brief and simple. (that are not my cualities) Introduction : I have to plot a signal that at the beginning has a big value, let say 60V and then the signal stays near 4V. The ...
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2answers
129 views

Question about multimeter resolution

So i got a multimeter from a friend for free. This is the one: Multimeter Info In the manual of the multimeter it says that the lowest resolution of DC Voltage is 0.1 mV. does that mean that i can ...
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2answers
2k views

Choosing resistance in series with a photoresistor for best light-measurement resolution

simulate this circuit – Schematic created using CircuitLab I have a photoresistor, R1, and as a voltage divider a fixed resistance, R2. There is a voltage of 5V over these two, and the voltage ...
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2answers
554 views

ADC resolution after voltage divider [duplicate]

I am working on a project where I have to monitor Vehicle fuel levels using an ADC of a micro controller. My fuel signal is a 0-12V signal & my 10 bit ADC is 0-3.6V range. I have 2 questions :- ...
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1answer
44 views

Effect of increasing Detector Range in Power Usage

I have two separate systems. System 1 can measure well biochemical events in the frequency [1,180] Hz. System 2 is designed to measure low frequency electromechanical processes in the frequency [0....
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2answers
708 views

Arduino's Resolution with Multiple Analog Inputs

Resolution of an analog to digital conversion means the ratio between the maximum value of the measured signal to the number of data point that it can resolve(0-1023). So for Arduino(10-bit) my ...
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1answer
86 views

Selecting the appropriate sensor?

I use an analog input (AI) reading board with 12 bit resolution and read range +-10V. The board AI reading error is given as +-5mV. I need select a pressure sensor, one of them gives 0-5V output, ...
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2answers
490 views

An intuitive question on the meaning of bins in a power spectrum of FFT

In Fourier analyses and FFT we see the power spectrum with a frequency resolution. I'm trying to understand the meaning of it. What is binning? What does power spectrum indicate. To expound my ...
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1answer
506 views

Normalize values from different MEMS 3-axis accelerometers

I have to find a solution to uniform values on 3-axis accelerometers on different android devices. I mean, a device with a specific accelerometer, subjected to the same acceleration, return values, ...
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2answers
953 views

Increasing the resolution of a sensor by using an amplifier

I'm new to electronics and I'm trying to design some circuits and blocks on my own. I'm making a block to measure temperature in a range between 2ºC and 50ºC, by using the sensor LM35. I have set ...
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1answer
567 views

How to measure distance between two moving objects?

I wanted to ask if anyone knows a way to measure the distance between two moving objects (actually one is fixed and one moving)? Can I place on one of them a transmitter and on the second one a ...
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2answers
317 views

LUT - Maximum error of linear interpolation approximation

I'm currently using an LUT (Look-Up Table) stored in a microcontroller, to read the temperature from an NTC sensor. I'd like to achieve a precision which is known, it doesn't matter if it is not so ...
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1answer
367 views

LED display resolution dpi

I had a question about the resolution of an OLED display. It's says the resolution is 128x128 dots under the display format in the datasheet sheet of the OLED. Does this mean that there are 128 dots ...
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1answer
67 views

Resolution of Oversampling Converters

This is a question from this application note: http://www.atmel.com/images/doc8003.pdf In section 3.2 on noise it says that adding some amount noise into the signal helps in increasing the resolution ...
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1answer
218 views

Delta Sigma Converters: Resolution

This question is in reference to my earlier question: Resolution gain in Delta-Sigma Converters What I understand From the answers I inferred that we need the input to have some amount of noise (to ...
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2answers
301 views

Resolution gain in Delta-Sigma Converters

Suppose I have a two bit quantizer with the following voltage levels: [0 0.2 0.4 0.6]. Thus 0V corresponds to bits 00 and 0.6 to bits 11. Suppose I use this quantizer in a first order delta sigma loop ...
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1answer
107 views

How can an ADC measure below its resolution?

An ADC's resolution is set by the maximum input voltage divided by 2b where b is the number of bits. In that way, a 16-bit ADC with 20V input can measure a voltage of 20/65536 = 0.3mV (corresponding ...
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0answers
92 views

how to resolve mismatch between PWM resolution and sensor resolution?

I have an application that uses a high resolution sensor. The actuation loop runs on this sensor's feedback. Thus, the PWM resolution is limiting my achievable resolution in the actuator's movement. ...
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2answers
261 views

Gain Resolution after delta-sigma (ΔΣ) analog-to-digital converter (ADC)

Is it possible (effective) to do oversampling and apply extra Moving Average Filter with a delta-sigma (ΔΣ) analog-to-digital converter (ADC)? More detailed: The ADC (ADS1258) I chose has an ...
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2answers
1k views

Stepmotor closed loop - matching encoder and microstep resolution

I am trying to get a high accuracy and not so extremely high resolution motor to work. It's a step motor with 200 steps/rev and the motor driver can compute up to 400x microstepping. We have an high ...
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2answers
1k views

How to determine minimal detectable acceleration on accelerometer?

How can it be determined the minimal detectable acceleration on analog and digital accelerometers? In datasheets I found only specification like sensitivity, noise etc. And how the minimal time for ...