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Inside the new Keithley DMM7510 7.5 Digit Bench Multimeter
What gives this unit it's superb 16ppm/1year accuracy specification?
What construction techniques have they used?
How and why are Fluke so heavily involved?
What considerations are given to the power supply and isolation aspects?
How does it compare with the cheaper Keysight 34770A meter?
UPDATE: The ADC used is a custom 32bit one for slow reading, and an 18bit AD7982 for faster readings. This chip is not marked, and there appears to be two of them on board.
Forum: www.eevblog.com/forum/blog/eev...
The Precision Thin Film Resistor Network video: • EEVblog #730 - Thin Fi...
Hi-Res teardown photos: www.eevblog.com/2015/04/09/eev...
Datasheets:
AD7982 18bit ADC: www.analog.com/media/en/techni...
LTC1050: www.linear.com/product/LTC1050
ISL28110: www.intersil.com/en/products/a...
LSK389 Ultra low noise matched JFET www.linearsystems.com/assets/m...
SSM2212 Dual matched transistor: www.analog.com/media/en/techni...
DG411 Precision analog switch: www.vishay.com/docs/70050/dg41...
TPS65251 Triple Switcher: www.ti.com/product/tps65251
Freescale MPC5125 Processor: www.freescale.com/webapp/sps/s...
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Опубликовано:

7 апр 2015

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Комментарии : 240

@davesherman74 5 лет назад

Nicely done. Former Keithley engineer, 1997-2014, just before the model 7510 was released. I can say that the Actel FPGA at

@Landrew0 9 лет назад

I don't understand the anti-China bias. They can build up to any quality standard (as evidenced in this video) but they can also build down to any price, but it's unfair to judge them only on that.

@scottydawg1234567 9 лет назад

I'm not an engineer (art student, actually), so I don't always understand the jargon, but that doesn't mean I'm not fascinated by electronics (rspecially old computers and such)! I love this whole channel.

@mikeselectricstuff 9 лет назад

Mains sensing will be so they can sync the sampling to mains freq to eliminate hum - On the Agilent you select sample time in terms of powerline cycles

@ravener96 9 лет назад

i love the high FPS. it's amazing. thank you for providing it, even if it increases the time you need to spend on each vid.

@jackwyz22 9 лет назад

Thank you for the teardown! You spend a lots of time on each video and i enjoyed it! Keep the good work up!

@djm384 4 года назад

Thank you very much for this review, it is really well explained and described.

@dwDragon88 9 лет назад

Imagine the extra cost in labor alone to hand assembly all of those odd custom assemblages, like the crazy custom AC power supply and the "LEADS WILL BE EQUAL LENGTHS" resistors. This thing is old school in all the right ways. I hope the performance lives up to the high expectations!

@darrenwatson8855 9 лет назад

Just come to say Hi I love your videos your enthusiasm has me hooked on electronics

@stephenborst3535 7 лет назад

I want one ! Awesome stuff Dave , keep it up!

@xjet 9 лет назад

That's why I love my Sony HDR-PJ760VE -- it has 96GB of internal memory

@GoldSrc_ 9 лет назад

The thing about the same length legs on the resistors is obviously to prevent fights between the electrons about who got the longer leg xD.

@mjlorton 9 лет назад

Very nice Teardown. A very nice piece of kit.

@PacketCyclotron 9 лет назад

I can't stop drooling. Dave gets all the toys.

@Narwaro 6 лет назад

They have to be careful that they dont turn this thing into a mini oscilloscope with all those logging functions and the update rate ...

@richfiles 9 лет назад

Oh mai!!! That's a sexy beast! :O

@davidcasper312 5 лет назад

Thanks Dave, primo info

@eumoria 9 лет назад

having to replace optoisolators on cnc hardware it would be amazing to have them on a module like that rather than having to pull the chip off and replace on the main expensive board. every kit should have the isolation modular like that i love it