General > General Technical Chat

Chip of the day!!!.........

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Warhawk:

--- Quote from: Simon on July 13, 2023, 12:33:38 pm ---
--- Quote from: Smokey on July 09, 2023, 09:04:16 am ---Find an interesting/useful part? 

Think other people will also think it's interesting and/or useful? 

Post it here. 

Chip of the day!

--- End quote ---

You know, that's difficult. You can submit documentation feedback as shown in the attachment.


No thanks, I want them to be available tomorrow  ;D

--- End quote ---

Simon:
I don't think documentation feedback will help with supply.

VK3DRB:

--- Quote from: Warhawk on July 13, 2023, 11:27:34 am ---
--- Quote from: VK3DRB on July 13, 2023, 07:28:59 am ---
--- Quote from: nctnico on July 10, 2023, 10:22:53 pm ---Currently I'm quite pleasantly surprised by the abilities of the ESP32-S3 chip. Only downside I've seen so far is the crappy ADC but other than that the software ecosystem is nice, well documented and the chip is very capable.

--- End quote ---

You are right, the ESP32's in general are great other than the ADC. Super low cost and unlike other MCU suppliers (Microchip, TI and STM), I could get ESP32-C3's during COVID - and that is the reason I used them in two projects, albeit at risk. Also used an ESP32-S3-WROOM. You can calibrate the ADC's but still they are mediocre at best. No good for accurate analogue measurements, but I did use it on one project for a non-critical battery fuel gauge (could not get fuel gauge chips during COVID) and it was OK.

Espressif's BLE documentation is a dog's breakfast. Their hardware datasheets has ambiguity in them and is missing some detail that would be found in, say, TI and Analog Devices datasheets. The ecosystem is satisfactory but not great. Mind you I recently found a glaring pin-out error in Texas Instruments two year-old chip that no-one at TI had even picked up. The pinout list showed input pin for CAN bus data incorrectly described as a chip enable pin :wtf: TI's documentation QA is in trouble if such an error can exist for two years before they know about it. Overall Espressif does a reasonable job with their English documentation, considering it is a Chinese company.

No complaints though, because ESP32's got me out of a bind during COVID. Super low cost, which is good for high volume cost-sensitive projects. Plus I learnt to use a new MCU.

--- End quote ---

Which TI chip? I get it fixed.

--- End quote ---

The ISOW1044BDFMR. I did report it about 3 weeks ago, and to TI's credit they fixed it immediately and re-released the document. Pin 3 was listed as a chip enable when it was in fact a transmit data line.

I find it incredible no-one else has ever used this chip, of if they have, they are too busy or self-centred to report the error. Mind you, if I reported every bug in Altium, I'd never get any work done.

Smokey:

--- Quote from: Someone on July 10, 2023, 08:47:52 am ---
--- Quote from: Warhawk on July 09, 2023, 10:07:49 am ---I like OPA991 family (or the 992 upgrade). Quite a universal opamp.
--- End quote ---
TI are iterating on "universal opamp" with others like OPAx828, or chopper OPAx189 lots of progress with analog capabilities still growing.

--- End quote ---

Wow.  Those are some impressive specs..  but at $6.30 in 1s... Not quite universal prices... 
https://www.digikey.com/en/products/detail/texas-instruments/OPA4189IDR/15857137

Smokey:

--- Quote from: VK3DRB on July 15, 2023, 08:02:50 am ---...
The ISOW1044BDFMR. I did report it about 3 weeks ago, and to TI's credit they fixed it immediately and re-released the document. Pin 3 was listed as a chip enable when it was in fact a transmit data line.
...

--- End quote ---

Datasheet from TI shows revision date of Dec 2021.  Pinout for Pin3 shows it correctly as TXD. (Enable shows as Pin8).
https://www.ti.com/lit/ds/symlink/isow1044.pdf

TI document control almost certainly is ISO9001, which makes revising a document but not bumping the revision essentially impossible.   

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