Hello folks. First time for me working with SOIC. I looked at the datasheet which shows a shaded area for pin1, but am unsure how to determine PIN 1 for the parts I have. Your assistance is appreciated.
See attached image of BB OPA604AU SOIC8
edit - My attached pic is of one part laying on a conversion board, not soldered and not sure if oriented ok.
Thanks - Steve
See attached image of BB OPA604AU SOIC8
edit - My attached pic is of one part laying on a conversion board, not soldered and not sure if oriented ok.
Thanks - Steve
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Take care with soldering, this ic might be sensitive to electrostatic discharge.Wear a bracelet connected to mains ground through a 1 Megohm resistor and use an electrostatic mat like this one:
https://www.ebay.com/itm/3249326463...MIytqMgqTp_AIVROR3Ch2gMQNVEAAYAiAAEgLP9PD_BwE
https://www.ebay.com/itm/3249326463...MIytqMgqTp_AIVROR3Ch2gMQNVEAAYAiAAEgLP9PD_BwE
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DON'T TAKE THIS ADVICE THOUGH 🙂:
I have two big proffessional mats and bracelets, yet I never use them and also use a 100 watts ac electric solder gun so there's electricity through the wire soldering everything I do and I never fried any circuit or transistor, I might have mildly damaged some cmos ic's as they were not my property , yet some of them work even after 10 years in 24/7 industrial machines...BUT I do have some skills to cover my deep contempt to my IPC 610 qualification which is real too 🙂 Some of the things they ask to get those qualifications are made to cover for financial cuts and expenses on leaded or ROHS solder , not really adjusted to reality.I saw tons of electronics that failed due to poor electrolitics, bad heatsink or simply bad design instead of some cmos ic failing...Actually never met a failed cmos IC unless the mosfet transistor that it was driving ended up in flames dragging half of all pcb with it .I'm the guy who always blames it on the designer choices, instead of throwing the first floor soldering guys into the manager's mouth on bad soldering grounds.I met way many more bad designers than production solderers and designers always blame on esd protection measures not being taken care of to cover for their incompetence and poor design.
Here's my QUICK ESD measures for the lazy solderer:
Wear less plastic on you and more cotton, dip a finger in your mouth moisturizing it with your saliva and touch the mains ground with the tip of that finger for 5 seconds before you start soldering.Even if there's any ac circulating through that ground the shock won't kill you from just that unless you have a weak heart and if you have a bad heart you shouldn't do electronics. 😉 That will last for at least half an hour till you accumulate some charge on your body, but if you're all cotton and your shoes aren't isolating you from the ground you won't accumulate any charge on you in a full day.
I have two big proffessional mats and bracelets, yet I never use them and also use a 100 watts ac electric solder gun so there's electricity through the wire soldering everything I do and I never fried any circuit or transistor, I might have mildly damaged some cmos ic's as they were not my property , yet some of them work even after 10 years in 24/7 industrial machines...BUT I do have some skills to cover my deep contempt to my IPC 610 qualification which is real too 🙂 Some of the things they ask to get those qualifications are made to cover for financial cuts and expenses on leaded or ROHS solder , not really adjusted to reality.I saw tons of electronics that failed due to poor electrolitics, bad heatsink or simply bad design instead of some cmos ic failing...Actually never met a failed cmos IC unless the mosfet transistor that it was driving ended up in flames dragging half of all pcb with it .I'm the guy who always blames it on the designer choices, instead of throwing the first floor soldering guys into the manager's mouth on bad soldering grounds.I met way many more bad designers than production solderers and designers always blame on esd protection measures not being taken care of to cover for their incompetence and poor design.
Here's my QUICK ESD measures for the lazy solderer:
Wear less plastic on you and more cotton, dip a finger in your mouth moisturizing it with your saliva and touch the mains ground with the tip of that finger for 5 seconds before you start soldering.Even if there's any ac circulating through that ground the shock won't kill you from just that unless you have a weak heart and if you have a bad heart you shouldn't do electronics. 😉 That will last for at least half an hour till you accumulate some charge on your body, but if you're all cotton and your shoes aren't isolating you from the ground you won't accumulate any charge on you in a full day.
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Actually there's a last brain esd discharge that kills you anyway so who cares about your heart ? 🙂
Wool's really bad for electronics.I actually asked myself once if the artificial wool inside the speakers cabinet making physical contact with the moving speaker and the filter and wiring can cause an amplifier's death.
Wool's really bad for electronics.I actually asked myself once if the artificial wool inside the speakers cabinet making physical contact with the moving speaker and the filter and wiring can cause an amplifier's death.
You are in Minnesota? Indoor air must be some like Maine. This time of year can be SHOCKING due to low-low humidity. Also using cats as lap-warmers, furry dog on the feet, rayon sofa-blanket, and silk/nylon undergarments because who will know? Just getting off the sofa can build 10KV in seconds, touch your lover, ZAP. (Dilute Downy softener in a sprayer on all soft goods will slow static charge.)
In New Jersey in the summer, 85F and 85% humidity, we never had static.
In the winter months the humidity in my work/hobby space is typically 30% or less, I use tools that are designed to be ESD safe when handling SMD components and mosfets during project builds, my bench and mat are grounded. All of my soldering irons are grounded. I wear always wear a wrist strap when handling low voltage logic ICs, and most of the time for other low voltage components. I also use a small humidifier right near my work bench which helps a lot.
I avoid wool and other clothes high on the tribo-electric series, often wear short sleeved synthetic/cotton shirts when modifying or building stuff I know is ESD sensitive.
I avoid wool and other clothes high on the tribo-electric series, often wear short sleeved synthetic/cotton shirts when modifying or building stuff I know is ESD sensitive.