Voltage reference module - Battery\power supply - Page 1
Forum section: electronics / beginners

author: rorymax
author_rank: Contributor
timestamp: November 14, 2021, 05:55:44 pm
content: Help a neophyte out please.What battery\power supply type do I need to make this module function.Thank you.https://alexnld.com/product/ad584-high-precision-voltage-reference-module-4-channel-work-on-2-5v-7-5v-5v-10v-4-5-30v/

author: ledtester
author_rank: Super Contributor
timestamp: November 14, 2021, 06:20:25 pm
content: The datasheet:https://www.analog.com/media/en/technical-documentation/data-sheets/ad584.pdflists a maximum voltage of 40V and mentions a preferred voltage of 15V which is also what I see in other listings for AD584 modules.I think the battery holder is meant for a 12V battery - like a "23A" alkaline cell.This listing mentions 14V - 24V for the power supply:https://www.arduino-tech.com/ad584-2-5v-5v-7-5v-10v-high-precision-voltage-reference-module-reference-sources/

author: ledtester
author_rank: Super Contributor
timestamp: November 14, 2021, 06:24:09 pm
content: Well -- it turns out they say something in the product description:and, in fact, it's even in the URL!Code:https://alexnld.com/product/ad584-high-precision-...-work-on-2-5v-7-5v-5v-10v-4-5-30v/^^^^^^^Update: Noticed that you can get 15V alkaline batteries -- search for "A220" or "504A".

author: rorymax
author_rank: Contributor
timestamp: November 14, 2021, 07:55:17 pm
content: Thank you ledtester, and I mean that sincerely.But I did note that I was a neophyte, regretfully I did not find what I wanted to see or identify what I was looking for in the product description or the URL.I just needed a simple direct reference to a component\product that I could use.I wish I was not new to all of this, if I wasn't a total amatuer I would not ask for help from all the good people on here.We all started our journey at the beginning.Regards,J

author: Terry Bites
author_rank: Super Contributor
timestamp: November 15, 2021, 11:46:08 am
content: The input voltage should be as low you can go without loss of performance- this keeps internal heating of the referrence lower. From the data sheet 2.5V head room is required so >12.5V. A couple of 9V batteries will work well. Two PP3's will give you >40 hours with the referrence current maxed out (10mA). At 1mA output >200 hours.Alternatively you can generate 15V from lower voltages, say 5V from a usb port with a boost converter, eghttps://www.amazon.co.uk/Positive-Negative-Step-up-Converter-Welding/dp/B09L1GV9TP/ref=sr_1_2?keywords=boost+15v&qid=1636976433&qsid=258-7311914-9404305&sr=8-2&sres=B09G38Y7BP%2CB09L1GV9TP%2CB08KW7FFL7%2CB098F5CDBY%2CB09G3BN6KX%2CB08VDQVKY9%2CB07KP3PGP7%2CB07CG7T7VN%2CB0814T1FHF%2CB08HLPXT26%2CB07TBLL8DY%2CB08CNCB2CN%2CB09LD723D5%2CB08K4MBBGX%2CB07Q8QHYM8%2CB08FD31RZC%2CB09FJXDML6%2CB09FJVK1MZ%2CB08MDYGVVT%2CB08MDY2ZX8Much cheaper than a battery! You'need a bit of filtering to keep noise entering your Ref. Ask for advice again if you choose to go down this route.

author: ledtester
author_rank: Super Contributor
timestamp: November 15, 2021, 01:23:11 pm
content: A module that employs a boost converter (the "KKMOON" version) is reviewed here:https://www.markhennessy.co.uk/ad584_references/and he notes that it introduces some switching noise:https://www.markhennessy.co.uk/ad584_references/#:~:text=There%20is%20some%20switching%20noise%20at%20the%20output.Still gives the module a thumbs up.There's also a review of the version the OP is asked about following that right afterwards.

author: rorymax
author_rank: Contributor
timestamp: November 16, 2021, 09:28:59 pm
content: Thank you UH,I will try 2 x PP3 battery's initially but I would really like to try the device you linkedto also.If I understand correctly I need a filtering device\component, what would I need and how is it attached to the step up boost converter?Also, what components do I need to attach the step up boost converter to a USB port on say my laptop.I am a complete beginner with virtually no understanding of basic electronics hardware, if you feel that I am too much of a novice to understand what is required then I will completely understand if you forego giving a reply.Either way, thank you for taking the time to reply, it all really helps me to improve my understanding of what can be achieved.Best to you, R.

author: Kleinstein
author_rank: Super Contributor
timestamp: November 16, 2021, 10:22:43 pm
content: Using USB to power the referenceis usually not a good idea. USB is know as a rather dirty power source and the boost converter adds to this.The reference does not need much power and in most cases one does not need to power the reference for a long time. Often is is something like 10 to maybe 30 minutes to really let it warm up / stabilize. For an accurate measurement it helps if the voltage source is isolated, like a battery. So 2 x PP3 or maybe 10 x AA would be sufficient for most uses.