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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46 views

How does manufacturer determine initial tolerance for capacitors?

Short version: I understand resistor initial tolerance is commonly obtained through sorting process where manufacturer only picks resistor that has resistance within the advertised initial tolerance. ...
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Ferrite bead DC-resistance tolerance

What is the DC-resistance tolerance for a smd ferrite bead (e.g. BLM18RK102SN1D)? Does anyone know? The datasheets I have seen only give a maximum value for the DC-resistance.
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Buffer SWD programming pins for 20VDC tolerance?

I have an application that I'd like to use some existing connector pins for SWD programming. All exposed pins and pads on the device must be 20VDC tolerant. I think I could solve this with an ...
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Is error due to sensor tolerance random or systematic? [closed]

Welcome all. It might sound like basic question however it is question worth asking.
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What's the precision of a quartz crystal?

Crystal datasheets usually list the following parameters: The Frequency Tolerance of a crystal is defined as the allowable deviation from the specified Frequency when measured at 25°C or room ...
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Placement of Through Hole with a High Tolerance Dimension

Beginner question here. What does one do about the placement of the through hole when one dimension of the part has a high tolerance. For example, I place the through hole anticipating the center of ...
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Choosing resistors in series to make standard values

I am working on designing a precision analog filter for a university electronics project. The resistance values I am using (to meet the filter specifications) are not E96 values, so I am combining ...
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156 views

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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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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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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How to design two circuits with Instrumentation Amplifier to produce the same output?

I want to measure the current in a 5V circuit. The current is between 50uA and 2.5mA. The current is from a NTC and it changes slowly (10Hz measurement is fast enough). Here is the typical ...
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142 views

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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Calculate the differential common-mode gain of instrumentation amplifier

I am trying to design an instrumentation amplifier with a CMRR of 50 dB. I have to target a differential gain of 60 dB. $$ CMRR(dB) = 50 dB = 20log(\frac{A_{vd1}}{A_{cm1}})+ 20log(\frac{A_{vd2}}{A_{...
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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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What is the impact of Earth's magnetic field polarity on consumer electronics?

Earth's magnetic poles are known to have inverted in the past. How are commonly used circuits or component of consumer electronics (from energy production/transportation to TVs, mobile phones and PCs) ...
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lm35 Temperature Readings are not right after sealing with Hot-melt adhesive (How mush has it Soldering max Temp toleration ?)

I need to seal the LM35 temp sensor so, I used this device for sealing it: The code I have used are: ...
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Inductor size versus tolerance

Say I’m planning to prototype some circuits (filters, oscillators, etc.) by soldering the component leads together in a “hairball” construction. If I use typical 10% or 20% tolerance inductors, how ...
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Decreasing manufacturing variance in analogue designs

I'm designing some modular sensors for my company's internal testing. Most are analogue, with a sensor (PT100, current shunt, pressure transducer etc), some interfacing (REF200 based PT100 circuit for ...
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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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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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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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choosing crystal when tracks are very close together

This is a circuit I am having trouble with. I made 20 units with the exact same setup. Three units with this setup managed to work with 33pF ceramic caps with 20% tolerance and a crystal from Ebay. ...
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282 views

How do I model a resistor array in SPICE?

I am currently building a library of SPICE simulation models that is going to include resistor arrays. These arrays exhibits both absolute tolerances and relative tolerances. Usually, the relative ...
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668 views

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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RTC time advancing

I'm working in some projects with an RTC. I'm using the PCF85063A. The problem is: the RTC counter is advancing from real time about 2 minutes per week. I searched for hardware and firmware errors, ...
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Solar variation tolerance for a solar panel

How to estimate average variation of input solar radiation that would be tolerable for a given solar panel? On what parameters will it depend?
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Meaning of a potentional tolerance value for a dimension in a mechanical drawing

The mechanical drawing below contains two dimensions (2-Ø2.30 and 4-Ø0.92) that I can't make heads or tails of. I have spent quite a while researching mechanical dimensional and tolerance conventions ...
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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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Circuits that take advantage of tolerances in components

Bit of a wordy question title... I was trying to simulate an astable multivibrator the other night and the simulation refused to run. I eventually realised that because the simulation assumes perfect ...
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259 views

Identification of 5 band Resistor from power supply

This Resistor is not functioning The 4th band is Gold, I've read that means it's an exception. The 3rd looks to me as silver, not gray, this is why I've added a picture. I'd like to replace it, so ...
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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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Electrolytic Capacitor Tolerances

Recently I went to order a set of these 100uF electrolytic capacitors with 10% tolerance, needed for impedance balance for an audio output. When I noticed they were out of stock, I decided to order a ...
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Why do I read resistance on the continuity setting but not on the resistance setting?

Disclaimer: Newbe A multimeter tutorial on Youtube said that to test my washing machine inlet valve solenoid for continuity I can use either the lowest ohms setting (200 on my DT830B) or the ...
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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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What does the tolerance mean for the 0 ohm resistor

What actually is the percentage tolerance if resistor is 0 ohm?
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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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Estimating gain tolerance

Estimate the gain tolerance (+/- X%) of the non-inverting amplifier in Fig. 3 assuming that the tolerance is solely determined by the errors in the resistor values. Only resistors involved in the gain ...
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Maximum tolerance for a loop trace-antenna's capacitor

While going through the document at https://www.silabs.com/documents/public/application-notes/AN639.pdf I have read from "Figure 13. Loop Antenna Simulated Mag(Zin) vs. CP1" below that even a 2% ...
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Parameter tolerance estimation with non-pure ratios

I am trying to estimate the exact tolerance of a simple circuit, consisting of an op-amp based, inverting comparator with hysteresis. This is the schematic (electronic-tutorials.ws) For which I ...
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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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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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Cheap precision sense resistor

I need a precision low value sense resistor to make current measurements e.g. 10R 0.01R. Looking for precise resistors e.g. Vishay, show that these are expensive e.g. $35 for a single 0.001-0.005% ...
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What is life tolerance of a resistor?

Is anyone familiar with the term "life tolerance of a resistor" ? I could not find a good read in google. Any link with the explanation will be sufficient.
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Capacitor tolerance at high frequencies

I was measuring a 10pF 0603 +-5% (Johanson 251R14S100JV4S) using a network analyzer at 319.5MHz. The cap came in their high q/low ESR ceramic kit. It measured about 10.7pF. But after measuring a few ...
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Constant current circuitry tolerance dependency

I have the below given circuitry. The circuit provides ( 12 - 3.3 = 8.7 V) 8.7 V / R3 of current. My specific question: What is the effect of PNP transistor on the variation of current? Until ...
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How many bins can I code using a resistor on an ADC

I have a device that can have different things plugged into it. I'm trying to use a resistor on these things to uniquely identify the thing. That is, if I plug in Thing A, I can read the resistance as ...
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How much can a power brick safely vary from what the device it's used with expects? [duplicate]

How much can a power brick safely vary from what the device it's used with expects? As an example, let's say I have a device that needs an AC=>DC power brick. The device expects 19V/1.58A, but the ...
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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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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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What capacitor types perfom best for large-value signal path applications?

Most signal path/timing capacitors are of stable types such as film or C0G ceramic. However, size and cost force an upper limit on this -- C0G caps out at 10-100nF, while film caps can manage up to 1-...