Questions tagged [tolerance]
A window of acceptance, often expressed as a percentage, in which a non-perfect value is still accepted as usable.
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Are two (or N) resistors in series more precise than one big resistor?
Let's say I have one 2 kΩ resistor with 5% tolerance. If I replace it with two 1 kΩ resistors with 5% tolerance, will resulting tolerance go up, down, or remain unchanged?
I'm bad with ...
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Why are resistors tolerances relative instead of absolute?
Every resistor has a tolerance, this provides the user with an idea of the accuracy of the product. This tolerance is represented by a percentage. This means: a big value resistor will be less ...
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Can a 10% resistor be used as a 1% resistor?
If my schematic calls for a 1% resistor, can I use a 10% resistor that measures to the correct resistance within 1% or is there some quality to tolerance beyond what it measures Ohm-wise?
For example,...
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Is there ever any reason to prefer 5% tolerance resistors over 1%?
I work at an electronics store and the other day a customer came in who was rebuilding a circuit board. I sold him some resistors, but later he came back in wanting to return some of them because they ...
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Is there a way to average resistors together to get a tighter overall resistance tolerance?
I have a very sensitive, kHz frequency level, application where I need two matched resistors of the same resistance better than 0.05%. Like maybe by one magnitude (0.005%).
I am basically needing to ...
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Why are we still using resistors with 5% tolerance while they can even manufacture a 14.318182MHz crystal?
Year is 2012 and I can only find 5%-tol resistors in the local market. They can make transistors at molecular scale, they can manufacture 14.318182MHz crystals, they can place trillions of flip-flops ...
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4-bit bus address selection via analog input pin: Monte Carlo simulation shows overlapping address values
I designed a small sensor PCB for my master thesis with an ATtiny44 microcontroller. I need about 200 of these boards for my application and 16 are always locally connected to controller board. The ...
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Resistors - binning and weird distributions
I read about a little quirk related to binning resistors in a comment on this recent question.
Some manufacturers will sell, for example, 1% and 5% resistors that are really made in the same batch. ...
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Why would a part be available as 4.99k and 5k?
I was looking at chip resistors, and came across the MORNTA1001AT5, which comes in many resistance values. The resistor tolerance is 0.1%, so what is the logic of having the part available in both 4....
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Reducing the tolerance of resistors manually
All the resistors available come with a finite amount tolerance. This is undesirable particularly in highly sensitive systems. While we can use resistors with the least tolerance available, I want to ...
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PCB enclosure tolerances [closed]
I can imagine problems of PCBs not fitting into their enclosures or misaligned screw/hole pairs. Are these type of problems common, especially with the dirt cheap enclosures?
I am planning to use one ...
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Parts tolerance simulations in ltspice
I just recently found this tutorial (and various other places mentioning a similar technique) when trying to evaluate how one of my circuits behaves when using real world components with real world ...
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Resistor Tolerance - are measured resistor with the same value but different tolerances the same?
Probably a real newbie question but I can't seem to find an answer easily...
If I have 2 resistors both 1K but one is a 1% tolerance and the other is 10% and I measure them and they are the same. Let'...
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Component Tolerance Probability
This is more of a manufacturing question than anything else.
What is the probability distribution of component tolerances?
For example, let's say I ordered a 100 ohm, 5% resistor, and I order 100 ...
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In terms of costs of mass production: is it better to try to reduce resistances' tolerance or capacitors' tolerance?
So I am doing a small project of optimization of components tolerance to reduce the impact of circuit sensitivity to meet a project specification.
Right now I am with 5% resistors and inductors and 3% ...
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How to calculate aging tolerance of Resistor?
I wanted to calculate the worst case minimum and maximum value of Resistor 1K by considering all the
tolerances(initial tolerance,temperature,environmental factors and aging).
Here is the link for ...
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4/5 band resistor - extra black band
I have two resistors which need to be replaced. I tried to determine the value, but it can't make sense of these black bands:
For reference the bands are:
brown - silver - green - brown - black
...
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Statistical accuracy of multiple resistors in series or parallel
I'm having a senior moment and would appreciate clarity.
I'm working on an inverting amplifier design where I need to add low-pass filtering and a voltage clamp.
Without the filtering and clamp, the ...
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5V Tolerance of 3.3V OUTPUT pin
Let's assume the following scenario:
uC (@3.3V VDD) drives an I/O pin HIGH 3.3V (just to be clear, it's not an open-drain pin, so the p-channel mosfet of the output pin is actually driving the pin to ...
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Root Sum Square
Can anyone in a simple way explain why this formula works. It is the Root Sum of Squares where you square your values then add together then take the square root. It seems to be used quite a lot in ...
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Rules for choosing power rating of a resistor
Let's say we're designing a system, and within it we have some resistor \$R\$ with a voltage difference \$V\$ across its terminals. Then it dissipates power \$P = V^2 / R \$.
Of course the resistor ...
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How can power factor be reliably estimated given the phase error in current sense transformers?
The majority of mains power sensing devices I've seen (both commercial products and ICs) utilise a current sensing transformer. Many of them also calculate or estimate power factor. However, the phase ...
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Why so much variance in the continuity beeper threshold? How do these beepers work anyway?
In this answer it is mentioned that the EEVBlog-branded BM235 meter has a threshold of between 30 and 480 ohms for its continuity beeper (as seen on page 25 of the datasheet).
My first thought was "...
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Precise Electronic Measurements
I've been looking into various electronic components and noticed rampant 5%, 10%, and even 20% tolerances and accuracies not only in basic components such as capacitors, inductors, and resistors, but ...
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What is the (most likely) technical reason behind temperature specifications?
Im talking about electronic devices, which may be handheld or similar, so nothing exposed to "artificial" temperature (welding, soldering, cooling with liquid gas). Devices designed to be operated by (...
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Confusion with the meaning of a component tolerance in terms of accuracy and standard deviation
As far as I understand a component's tolerance relates the difference between the actual component value and the value given on the data sheet.
If a 1k Ohm resistor have ±5% tolerance, is this 5% ...
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What is the maximum error of this ADC?
I've read every article on the first two pages of Google trying to understand DNL and INL. Not a single lesson gave a specific example I could relate to, so now I'm still wildly confused and have no ...
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What's the DC voltage range typically tolerated by modern smartphones?
The modern USB charging circuitry of mobile phones is pretty sophisticated. For example they can negotiate higher charging voltages etc.
This question, inspired by a discussion on worldbuilding, is ...
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Tolerance on a resistor when looking at a schematics
In the schematics at the end of this document, there are a bunch of resistors. The author says in a footnote:
Part Notes, All Pages:
Unless noted:
Resistors are 5%, 0.12 W, or better, for standard 5%...
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Can I use a 5% tolerance resistor instead of a 10% tolerance resistor?
can I use a 5% tolerance resistor instead of a 10% tolerance resistor? It is for an organ from the 60's. All resistors stated in Schematics are 10% 1/2 watt. But I can't find a 6.8k 1/2watt 10% ...
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Tolerance of board-to-board headers
I am designing two boards. The bottom one is the power board that contains power switches on IMS (metal-clad board), while the top board is the logic board (4-layer FR4). Board to board height is ...
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Is there a specific definition for the tolerance value of a resistor?
Is there any authoritative definition for what the tolerance value of a resistor actually specifies, or is it just a de-facto common understanding, or are the details left up to individual ...
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What exactly does a resistor's tolerance rating mean?
I thought that I had this pretty much figured out over 30 years ago during my initial schooling, but various answers posted to a support forum of a major semiconductor manufacturer(name withheld to ...
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Jitter in 'ppm' and 'ns'
In many datasheets clock tolerance is in ppm and in some other it is in ns or ps. What is the difference in giving clock tolerance in ppm and ns/ps. How it can be converted from one unit to another?
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Do photodiodes have tolerances?
Below is the beginning schematic for a circuit I'm working on. We have a previous revision of that product (Rev A), and two sets of recent product (Rev B1 and B2). Rev B1 was made 2 weeks prior to Rev ...
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Is a precise capacitor ratio repeatable?
I have designed a 1 MΩ, 0-100 MHz fixed attenuator circuit (15 pF / 300 pF). I am using 1% C0G capacitors. There is also a TS5A2053 analog switch connected to the output of the attenuator. The ...
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Component has a x% tolerance: What does this mean exactly?
All components have specification tolerances and ranges. Some examples are:-
Resistor 1%
Electrolytic capacitor 20%
Zener diode breakdown voltage 5%
Clearly it kinda indicates that the ...
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Monte Carlo Analysis in LTspice: Gaussian or Uniform distribution for the tolerance of resistors?
I am running 1000 simulations in LTspice to do Monte Carlo Analysis of the output voltage signal on a circuit with 3% tolerance resistors.
Firstly, does LTspice assume the resistors' values are ...
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Cascading resistors in series
Suppose, let's assume an IC pin requires a 10kohm 1% tolerant resistor connected to ground for its proper operation.
In that case, can someone tell me whether I can split the required resistors into ...
user220456
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How much is the tolerance of the transistors?
I am simulating circuits on SPICE (LTSpice and PSpice), I have assigned tolerances to both resistors, capacitors and inductors.
But now I would like to try to understand how much a transistor can ...
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Hand-matching resistors: high-end DMM vs Wheatstone bridge
I wrote an article dealing with the question of hand-matching resistors to high tolerances using a DMM. The driving purpose behind that article is to show that it's harder to do that than one might na&...
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Question about the accuracy of integrated resistors
I'm studying the implementation of resistors in integrated technology. In particular the books deals with the accuracy of the obtained resistors. It says:
Then it says:
"We observe that the value of ...
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Can an electronic system be built with absolutely no single point of failure?
Is it possible to make an electronic system, where every sub-system is duplicated and absolutely nothing is a single point of failure and if a failure (or multiple failures) occurs the system itself ...
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Does the LT Spice monte carlo simulation definitely output the max and min voltage for any number of simulation runs?
I have the following circuit, in which i need to calculate max and min voltages possible (considering resistor tolerance).
Does running a monte carlo simulation consider the absolute max and min ...
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soldering input pins to SN74HC595N shift register -- heat tolerance
I'm working on a project that uses the SN74HC595N shift register from TI. The nature of this project requires that I solder on pin extensions. My soldering skills are not too solid, so I'm worried ...
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Set the Gain of an Opamp Accurately Using a Potentiometer
I want to set the gain of an opamp accurately using an potentiometer, with low thermal drift and good long-term stability. From what I've read, there are three basic ways of doing it, but none of them ...
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1.2 GHz Cloverleaf Antenna tolerance
I'm working on building my own Cloverleaf antennas, to work at 1.2 GHz, for the video system on my Quadcopter. At this frequency, what kind of tolerance am I looking at in terms of the length of the ...
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Forward voltage tolerance on an ordinary diode
If one examines the datasheet of a diode such as the Vishay US1G, there is a graph of the typical voltage vs current such as Figure 3 below (with multiple lines for different temperatures):
However, ...
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PCIe add-in card thickness tolerance
I can't find a tolerance measurement for the 62 mils thickness specified in the PCIe electromechanical spec. How much leeway do I have for board thickness in an add-in card.
Additional details: I'm ...
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Should I be conservative about setting the output voltage of the CV phase of Li-Ion charging
Background
My application features a Li-Ion battery (NCR18650B) which I'm charging with the standard CC/CV method. Various constraints force me to use a generic buck converter (with current limiter) ...
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