Questions tagged [tolerance]
A window of acceptance, often expressed as a percentage, in which a non-perfect value is still accepted as usable.
112 questions
2 votes
1 answer
107 views
5V input tolerance on ATF16LV8
The features clause in the datasheet (https://www.microchip.com/en-us/product/atf16lv8c) specifically mentions "Inputs are 5V Tolerant", but the DC characteristics specify VIH to be MAX Vcc+...
- 123
4 votes
7 answers
2k views
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 ...
- 267
1 vote
1 answer
106 views
Ceramic capacitor, service manual mentions 99% tolerance?
Sony part 1-102-050-00 Service manual states: 0.01uF - 99% - 500V Ceramic cap looks like your average brown circle with no markings. Used in CRT projector. Basically no idea what tolerance I should ...
- 15
3 votes
5 answers
2k views
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 ...
- 489
1 vote
2 answers
90 views
How accurate are internal terminators on chips with high speed differential inputs?
I'm aware that due to process variation, some analog parameters of semiconductor devices can vary; sometimes quite a lot. (E.g. the SST3904 transistor specifies a DC current gain somewhere between 100 ...
- 28k
1 vote
2 answers
374 views
Internal RC oscillator for reliable UART
I want to use this microcontroller - Mini58FDE (Product page) (Datasheet) Clock parameters are mentioned as: Clock Control 4 to 24 MHz crystal oscillator Internal 22.1184 MHz (±1% accuracy at 25℃, ...
- 8,623
0 votes
2 answers
183 views
Tolerance Stack Up Distribution
Suppose I've got a 2V source with 2% accuracy that I want to divide down to 1V using 5% resistors. One can easily see with Monte Carlo analysis that the worst case output voltage deviation is 7% I'd ...
4 votes
1 answer
452 views
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%...
- 549
3 votes
3 answers
810 views
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 ...
- 33
0 votes
0 answers
158 views
DC-DC Converter usual tolerance
I wonder what the usual voltage tolerance is for a low power (approx. 1-20 W) Buck converter (over its whole operating temperature range). So far I have found values around +/- 1.5 % What is your ...
- 674
23 votes
11 answers
8k views
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 ...
- 231
0 votes
1 answer
222 views
Calculation of tolerance of a resistor for voltage sensing
I want to calculate the tolerance of resistor accurately to run a simulation to simulate accuracy of voltage sensor. The resistor I am using is CRCW0603330RFKEA - 330 Ω from Vishay and I can't see ...
- 367
0 votes
1 answer
297 views
Altium hole tolerance vs IPC hole tolerance
I would like to start using the hole tolerances in Altium to provide more information to my fab house. What I'm trying to figure out is the interaction with the IPC fabrication allowances I have ...
- 61
5 votes
1 answer
77 views
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 ...
- 11.5k
2 votes
2 answers
1k views
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 ...
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