ElectroStatic Discharge, it's caused by accumulation of electrostatic charge as a result of rubbing, and can damage semiconductor devices like integrated circuits.

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70 views

5v tolerance on 3.3v PIC

Many PIC microcontrollers such as PIC24EP512GU810 have 5V tolerant pins. My question is how does this work. Do these devices have clamping diodes for ESD protection? Would clamping the input voltage ...
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0answers
34 views

Certifications and ESD

I am designing a board (an eval board). We intend to go for certifications (CE and FCC). I have very small awareness of such things. Of concern to me is ESD among other things. I know that I will need ...
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1answer
78 views

Setting up a non-ESD area in a lab

this question is regarding standards and/or best practice guidelines for ESD control in a professional lab environment. We are currently tightening up our (admittedly too lax) ESD control in the ...
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1answer
88 views

Do I *need* a TVS Diode at the USB connector?

I've got a typical electronic trinket that will be connected to laptops and wall warts to recharge. Fairly cost-sensitive. Will a spark completely destroy the MCU with a USB peripheral? Is there a ...
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1answer
57 views

Simple ESD mat and wrist wrap setup

I have a hard time finding a how-to. I would like to set up a simple ESD mat and wrist wrap, but I am not sure about is the the 1 MOhm resistor should be, if at all. Several options: 1 MOhm from ...
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0answers
51 views

ESD protection for sensitive electronics

I've developed an electronics system that is comprised of box (power supply, board w/ FPGA etc) and a separate accessory unit that connects to the box via a 6 conductor cable. The conductors in the ...
3
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3answers
93 views

Oscilloscope gear and ESD

The answer might be obvious, but I am curious, how well are oscilloscopes and probes usually protected against ESD? I noticed that oscilloscope probes are usually shipped in esd-protected bags. On ...
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1answer
73 views

Did ESD fry my REF200 current source circuit?

Last summer I built a current source to power a custom-made pressure sensor. This source uses a REF200 IC and is powered by a wall wart that outputs 5V. The whole circuit is encased in a plastic box ...
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0answers
128 views

Does AEC-Q101 Certification mean a part has some ESD protection?

I'm working on picking out some FETs and would like to use some with ESD protection. While picking some parts out on Digikey I keep coming across datasheets that say AEC-Q101 compliant or sometimes ...
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2answers
564 views

Anti-static vs. conductive vs. dissipative foam?

UPDATE: I have included some basic answers inline that I received after talking in depth with an application engineer at a foam company. I think it would still really help for someone to help flush ...
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1answer
116 views

DIODE as capacitor?

How does Diode act like a capacitor when voltage across diode is less than forward voltage spec. Basically when diode is turned off? What is its usual capacitance when diode (zener) is turned off.
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1answer
169 views

Optocoupler TVS Protection for digital input module 24V 220V

I have two digital input modules that must match: IEC 61000-4-2 ESD Contact 6kV and Air 8kV IEC 61000-4-4 EFT 1kV IEC 61000-4-5 Surge Line to line 0.5kV and Line to Earth 1kV First module: 32 digital ...
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1answer
71 views

CAN bus ESD protection

For a CAN bus application, is it correct to connect an ESD protection IC to GND, or chasis of the device?
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0answers
70 views

Is ESD mat toxic? [closed]

I bought a 3-layer vinyl ESD mat for my lab and OMG this thing smells so bad. After several hours I can't even enter the room. Is it toxic? What do you do with your mat?
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2answers
91 views

ESD Protection Necessary for Water Detection Circuit?

I'm using a water detection circuit similar to the one found here I put it all together and it worked pretty well for a hobby project. The circuit hinges around an AC signal that's generated from a ...
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0answers
103 views

STMicroelectronics EMIF08-1502M16 ESD Protection and EMI filter output for 16-bit LCD interface

Hello everyone we've designed a circuit which is about an LCD driving on SSD1963 IC with 16-bit interface and it was normally working but we tested the ESD of the product the screen was going halt. ...
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3answers
239 views

Wood workbench as ESD protection?

ESD protection are really expensive for hobbyist like me. I have a grounded wrist strap but do you think a simple non-treated wood workbench surface can replace a really expensive ESD tabletop ?
2
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1answer
77 views

Where to send voltage peaks while ESD-protecting a subcircuit? To a subcircuit Vcc or to a global circuit Vcc?

I am going to use ST DALC112S1 (http://www.st.com/web/en/resource/technical/document/datasheet/CD00001317.pdf) to protect the SIM card connection between uBlox Leon G100 and the SIM card holder (VSIM, ...
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1answer
102 views

Micro Protection with Long Cables

I have a micro controller ATxmega128A1U (datasheet) which will have switches and potentiometers attached to the GPIO and ADC input pins. These inputs will have about 2-3 meters of cabling from the ...
2
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1answer
100 views

Wearing “conductive shoes” instead of heel grounders?

I've been looking into alternatives to heel grounders since they're kind of cumbersome to put on and take off often (not to mention being uncomfortable) and I'm considering buying a pair of ...
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2answers
83 views

Can wrist strap be attached to running PC?

Sorry if this is a noob question... I've Googled for instructions on how to use a wrist strap, but most of the answers I've seen assume that you're going to be opening up your PC and installing or ...
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3answers
181 views

What are ESD (Electrostatic Discharge) precautions?

In some device datasheets there is a caution about ESD (Electrostatic Discharge) precautions. These devices are prone to damage because of electrostatic charges made by human body. These charges may ...
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1answer
238 views

Purpose of exposed ground pads

I have a Beckhoff EL2008 8-channel digital output terminal that I took apart because I'm using an ASIC that is inside the module, Beckhoff's ET1200. There is essentially a ring of ground pads,some ...
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2answers
191 views

ESD protection on perspex electronics enclosure

I've bought some high power electronics with some sensitive components. Since they are just bare boards straight from the manufacturer, I have constructed a perspex surround with fans facing the ...
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1answer
457 views

Reducing the clamping voltage of a TVS diode

Followup to my previous question. I'm designing a product powered from a 5V supply that feeds it into a TLV1117LV33 LDO. Typical current draw for the project is less than 500mA, but the regulator is ...
7
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1answer
241 views

Tips on ESD protection for hobbyist designs

I'm finally getting into simple PCB design for my personal projects, and I'm concerned about ESD protection on exposed parts of my board like USB ports. I know how wrist straps work and I understand ...
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2answers
244 views

ESD protection of capacitive touch doorknob circuit?

This is a follow-up to my question: How can I use a generic doorknob as a capacitive touch sensor? I am now ready to move beyond the proof-of-concept stage, but I have not yet learned of a ...
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3answers
124 views

uC -> wire -> LED in metal enclosure. ESD/EMI protection

I need to blink a LED with a LPC micro-controller. Enclosure is solid aluminum. LEDs will be on a separate PCB 20cm away from uC PCB and protruding from the metal enclosure. What would be the simplest ...
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2answers
187 views

Regarding ESD diode's architecture

I need one clarification regarding ESD,EFT and SUrge protectors. Different manufacturers have architectures of diodes+Zenar diode combinations for different protection levels for different interfaces. ...
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3answers
191 views

Cheap ESD/safety Mat

I need to get some sort of ESD/safety mat (2 actually) for working at home to protect myself and equipment. I was wondering what to look for/avoid if I were to purchase a rubber mat from a rubber ...
2
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1answer
75 views

Is it OK to connect ESD plug through an RCD?

I am thinking of rewiring some of my workshop with a RCD spur for my machine tools and bench and an emergency stop. I use an ESD plug to ground an antistatic mat when working on electronics on the ...
0
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1answer
198 views

Why would one NOT buy ESD-safe tools? [closed]

For audio work, Arduino work and other electronics projects, why would you decide NOT to buy esd-safe screwdrivers, pliers, cutters and tweezers?
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3answers
357 views

Static-sensitive high-precision resistor?

I just received some 10K .1% precision resistors from Digikey (part number PTF10KECT-ND). Unlike all their other passive components, which come in a normal plastic bag, these came in a metalized bag ...
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3answers
273 views

ESD sensitivity of P-channel MOSFET vs N-channel

It is well documented that N-channel MOSFETs are extremely sensitive to ESD damage. I've personally killed more than one. Are P-channel MOSFETs just as sensitive? I'm thinking that, since the ...
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3answers
2k views

Ideal temperature and humidity for preventing problematic ESD conditions?

I know manufacturers often keep components sensitive to ESD problems in climate controlled rooms and I'm just wondering what the ideal temperature and relative humidity is to prevent ESD problems?
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3answers
342 views

How do I know I'm not drawing too much current for my 3.3V supply?

Continuing my learning expedition, I've decided to use the LM3S5R36-IQR80-C3 ARM Cortex-M3 MPU, to try and learn to build my own little experiment PCB, almost like the Teensy 3.0. The idea is to learn ...
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2answers
365 views

Can BJT transistors be damaged by static electricity?

I'm wondering whether they should be stored in anti-static bags or not?
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3answers
478 views

Does lacquer coat protect a PCB from ESD damage?

Does lacquer coat protect PCB from ESD? It seems that it actually does, because lacquer is isolation and it's a barrier from my body to the circuit. But I'm not sure.
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1answer
86 views

Safe insert/removal of XBee from circuit

Is it safe to remove an XBee or similar radio module while the host is still powered up? I am trying to build a programming jig using an ARM11. The peripheral board is connected with TTL level UART ...
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2answers
152 views

Can a pogo pin spring cause an inductive spike?

I have an IO pin on a LM3S1751 microcontroller tied to a pogo pin which shunts to ground when engaged. There is a 100k external pullup on the pin. The pin sees 3.3V when not engaged and 0V when ...
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2answers
189 views

ESD Protection for AC-coupled signals

This part apparently supports ESD protection of eSATA. But SATA interfaces are AC coupled. This means their common mode voltages could well be centered around 0V, with negative voltage swing. On the ...
2
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4answers
254 views

Why don't gas pumps spark and explode?

What Electrostatic Discharge (ESD) protections exist in the gas pumps at gas stations? I believe that here more than ever even one spark is intolerable. How can a it be assured that there is never ...
5
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2answers
683 views

Is it OK to rely on an ADC's internal protection diodes?

Related to: ESD protection of ADC input. To protect an ADC input from out-of-spec voltages, including ESD, it is often recommended to use diodes connected to GND and Vcc. If I have a 1k series ...
11
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3answers
1k views

Cleaning Circuits with Compressed Air

I've been arguing with a colleague whether it is a sensible solution to clean dusty PCBs with compressed air. While I think this is the best solution (nothing touches the PCB), he claimed that ...
7
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2answers
509 views

What should I look for when shopping for an ESD bench mat?

I would like to get an anti-static mat for my bench top and found these two: DigiKey: Table mat ESD blue 2X4' rubber Mouser: Antistatic Control Products 2X4' blue table mat What should I look for ...
3
votes
2answers
443 views

Why did my FM transmitter mysteriously die?

I made a little FM transmitter project a few months ago. I used an Arduino, a litle 4-digit serial LED display, a couple of buttons and an FM transmitter component with breakout board I had this put ...
3
votes
2answers
167 views

Determine the orientation of an ESD protection chip

I have an ESD protection chip that has been unsoldered from my board, and for which we have lost the orientation. (I.e. we don't know where pin 1 is - the little dot has gone.) Because of the ...
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6answers
631 views

Understanding voltage and current

While reading "Electronics for dummies" went through the following block and I realised that I have some uncleared concepts about electricity: Electrostatic discharge involves very high voltages ...
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1answer
223 views

ESD effect on MCU pin

I have a question about ESD effect on MCU pins that troubles me. MCU pins configured as input, that are not pulled low or high are likely to make trouble, and very likely to make trouble in case of an ...
2
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1answer
362 views

ESD Horizontal Coupling Plane

We have designed a circuit which is enclosed inside a plastic enclosure. The equipment was tested on a standard ESD testing site (on top of a isolated plate placed on a HCP). The equipment failed the ...