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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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 ...
6
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2answers
154 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
104 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
89 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
60 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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54 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
77 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
73 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
133 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 ?
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1answer
70 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, ...
3
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1answer
94 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 ...
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1answer
83 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
79 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
121 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
205 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
153 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
272 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
188 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
208 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
115 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 ...
4
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2answers
147 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
170 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
74 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 ...
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1answer
172 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
331 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
235 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
295 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
320 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
426 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
82 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
137 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
172 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 ...
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4answers
241 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 ...
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2answers
564 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
986 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 ...
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2answers
422 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 ...
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2answers
384 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
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2answers
154 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
611 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
204 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
312 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 ...
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2answers
2k views

ESD protection of ADC input

I'm want to protect a MCU(PIC18F67J60) ADC input(0 to 3.3V) against ESD surges. I have seen different approaches and has come in doubt what would be the preferred method. Or possible just pros and ...
4
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1answer
374 views

Why is static-dissipative (sometimes mislabelled “anti-static”) polythene pink?

Is it related to the anti-static properties (and therefore "all" pink bags are static-dissipative) Or is it simply a distinguishing colour added during manufacture which may also be applied to normal ...
4
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2answers
756 views

What is the difference between high and low density anti-static foam in terms of protection against ESD?

As far as anti-static foam is concerned, does it matter if it's high or low density? Or is it just another way to upsell me? On Amazon I see low density foam, and high density.
2
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1answer
101 views

What is causing the input to my buffer to be damaged?

I have recently been having issues where the buffer of the circuit below has been damaged. The output pin (2) does not change with changes to the input pin (1). I sent 2 of these ICs to Fairchild for ...
3
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3answers
197 views

I can't find a PFET protected against ESD

I like to use OmniFETs for MOSFETs because they have internal protection against ESD so I am unlikely to damage them while handling and then when they don't work I don't have to wonder if it was ...
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3answers
1k views

How can I tell if a chip has ESD damage?

I have a several chips (microcontroller, PIC16F1939) some of which have weird behavior (random resets, some pins pulled high some of the time). All of them are running the same software. I suspect ...
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1answer
386 views

esd protection of power supply line

I have designed a small MCU circuit which is to be supplied by a 3.3V DC supply. Since this is a small subcircuit which will be mounted upon other PCB's, I need to consider ESD (at least on the power ...
4
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1answer
473 views

TVS Diode Layout

I have two DB37 connectors on my board which ultimately connect to a CPLD. All of these connections/signals are inputs to the device. To protect from ESD I am using TVS Diodes ESD9C3.3ST5G. I have ...