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Thanks.According to wikipedia, a Plastic Dual in-line package is a through-hole component. I got TQFP. The chip in my hand is surface mount. What is going on?The datasheet says nothing about any 44pin packages at all. This makes no sense to me whatsoever.M
Quote from: king.oslo on November 03, 2011, 11:51:13 amThanks.According to wikipedia, a Plastic Dual in-line package is a through-hole component. I got TQFP. The chip in my hand is surface mount. What is going on?The datasheet says nothing about any 44pin packages at all. This makes no sense to me whatsoever.MEh?This document clearly indicates the MQFP package:http://ww1.microchip.com/downloads/en/DeviceDoc/21455d.pdf
I/PT stands for:I -> -25°C to +85°CP -> PDIPT -> TrayVREF- PIN 35VREF+ PIN 36
TQFP pinout is usually the same as MQFP. Thus, the information on the page 2 should be applicable.REF LO/Hi on the MQFP correspond to the usual Vref -/+ pins.
Hello there,First, I bought some Microchip TC7107I/PT chips. Now I am looking on the microchip website at the TC7107/A datasheet. Unfortunatly, it doesn't mention anything about the package that I bought it in. How can I then know which pin is which?http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010503... Now I need to figure out where the pins are on the TQFP-44, which is what I bought, but how do I go about that?
Then is a TQFP. See:http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010503
I struggle to see how, with Microchip can even bother spelling correctly, if t hey cannot stretch their correctness to annotating that the MQFP pinout is the same as the TQFP.
Quote from: king.oslo on November 03, 2011, 04:36:37 pmI struggle to see how, with Microchip can even bother spelling correctly, if t hey cannot stretch their correctness to annotating that the MQFP pinout is the same as the TQFP.They do. See here, where full details are found: http://www.microchip.com/stellent/groups/techpub_sg/documents/packagingspec/en012702.pdfYou know, you would be a lot less stressed out if you would stop trying to unload the blame for your problems onto Microchip. You need to calm down and think that maybe, if you don't understand something, the problem lies with your inexperience and lack of knowledge rather than with the material you are trying to understand?Any time you have a problem in life, your first thought should be, "What am I doing wrong?", not "Why is someone else wrong?"
Because I am so inexperienced, I fail to understand why this marvelous Microchip datasheet doesn't separate between Cref+ and Cref- on the pinout of the QFP when it separates between them elsewhere. The annotation used is on the QFP is Cref and Cref. Perhaps the polarity is without significance?What do you think?
CREF- See Pin 34 (CREF+)CREF+ A 0.1 ?F capacitor is used in most applications. If a large Common mode voltage exists (for example, the VIN- pin is not at analog common), and a 200 mV scale is used, a 1 ?F capacitor is recommended and will hold the rollover error to 0.5 count.
I am sorry if you were offended by my unloading of my frustration. I really am. I frankly thought that everyone would agree with me that it is unnecessary to alternate between annotations in datasheets. I failed to see how it is useful to deviate from consistent semantics. People without background in engineering in my line of work (which is to make illustrations) would regard this datasheet as the work of an amateur. If I made a datasheet, I would stick to Vref+ and Vref-, rathering than alternating between this and RefLo and RefHi plus a bunch of other things.Because I am so inexperienced, I fail to understand why this marvelous Microchip datasheet doesn't separate between Cref+ and Cref- on the pinout of the QFP when it separates between them elsewhere. The annotation used is on the QFP is Cref and Cref. Perhaps the polarity is without significance?What do you think?
Yes there are some different notations in use there, and indeed the odd typographical error. True enough that's not perfect and they could do better. But those datasheets are intended for engineers and the most important aspect is the underlying meaning and function of the pins. I do not think an engineer would have trouble understanding that datasheet.
Aren't you guys from the same country?Cheers,Dan
Quote from: Balaur on November 03, 2011, 04:29:26 pmAren't you guys from the same country?Cheers,DanSpain.
Mistakes and oversights in data sheets are not uncommon, report it to them and they can fix it or clarify in a revision.Dave.