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| Chip of the day!!!......... |
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| tooki:
--- Quote from: VK3DRB on July 15, 2023, 08:02:50 am --- --- 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. --- End quote --- I was pleasantly surprised at TI’s responsiveness to datasheet errors. I once found an error in the website description of some weird version of the 5534 op-amp (perhaps a mil-spec version or somethinf), where it was described as a quad op-amp (it’s a single). They fixed it right away. |
| tooki:
The UTI (universal transducer interface) from Smartec. https://smartec-sensors.eu/cms/pages/products/uti-interface.php It can measure capacitance down to a 2pF range (14-bit resolution) over long cables, more or less regardless of cable capacitance. I used it (in the 0-300pF range) to measure the level of liquid xenon in a cryostat through 3m of coax cable (at 100pF/m). Measurements reproducible down to 0.02pF with averaging. It can also do resistance, e.g. for PT1000’s. Downside is that it’s hard to find. None of the major distributors carry it any more, so you have to find a small local distributor. |
| griffinadams:
--- Quote from: tooki on July 16, 2023, 04:10:29 pm ---The UTI (universal transducer interface) from Smartec. https://smartec-sensors.eu/cms/pages/products/uti-interface.php --- End quote --- Nice. Quite a useful part, unfortunate name... Along the same lines, TI has the TDC7200 for ultrasonic timing measurements. https://www.ti.com/product/TDC7200 |
| tooki:
--- Quote from: griffinadams on July 17, 2023, 03:02:51 pm --- --- Quote from: tooki on July 16, 2023, 04:10:29 pm ---The UTI (universal transducer interface) from Smartec. https://smartec-sensors.eu/cms/pages/products/uti-interface.php --- End quote --- Nice. Quite a useful part, unfortunate name... --- End quote --- Ain't that the truth! ;D --- Quote from: griffinadams on July 17, 2023, 03:02:51 pm ---Along the same lines, TI has the TDC7200 for ultrasonic timing measurements. https://www.ti.com/product/TDC7200 --- End quote --- Neat! |
| Smokey:
Chip of the day = TMP1075 https://www.ti.com/lit/ds/symlink/tmp1075.pdf https://www.digikey.com/en/products/detail/texas-instruments/TMP1075NDRLR/15222310 $0.64 in 1s, $0.25 in 4000s. -40°C ~ 125°C Range, I2C Interface, Tiny SOT-563 package, Thermal Alert Output. Measure thermal load or ambient temp with a cutout. |
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