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Moderne komponente za preporuku

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Moderne komponente za preporuku
Braca Offline
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#81
10-15-2021, 02:27 PM
Broj diskretnih FET-ova na tržištu se sve više smanjuje, pa je ovo što sledi je tim vrednije: TI je nedavno lansirao niskošumni fet JFE150 (0,8nV/rtHz @ 1kHz):
https://www.ti.com/product/JFE150
Još lepše, od avgusta postoji i upareni JFE2140 u kućištu SOIC-8:
https://www.ti.com/product/JFE2140
s kojim se bez mnogo napora može realizovati neki diferencijalni niskošumni ulazni stepen.

Oba proizvoda nose oznaku Burr-Brown i reklamiraju se za audio primene.

Pozdrav
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Dragan100 Offline
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#82
10-15-2021, 04:13 PM
(10-15-2021, 02:27 PM)Braca Wrote: Broj diskretnih FET-ova na tržištu se sve više smanjuje, pa je ovo što sledi je tim vrednije: TI je nedavno lansirao niskošumni fet JFE150 (0,8nV/rtHz @ 1kHz):
https://www.ti.com/product/JFE150
Još lepše, od avgusta postoji i upareni JFE2140 u kućištu SOIC-8:
https://www.ti.com/product/JFE2140
s kojim se bez mnogo napora može realizovati neki diferencijalni niskošumni ulazni stepen.

Oba proizvoda nose oznaku Burr-Brown i reklamiraju se za audio primene.

Pozdrav
@Boban mi je skrenuo pažnju na njih, cca petnajst dana unazad, pa kad budu dobavljivi, da se prilagodi jedan RIAA MM!
:-)
Može i za drugo svakako, paralelovati njih 2, 4... pa da se snizi ulazni naponski šum, dok je strujni šum ranga femtoAmpera...
LP
Dragan
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Braca Offline
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#83
12-24-2021, 09:43 AM
TI pušta u prodaju "polovinu" dvostrukog OPA1656:

https://www.ti.com/product/OPA1655?keyMatch=OPA1655
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Dragan100 Offline
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#84
12-24-2021, 03:26 PM (This post was last modified: 12-24-2021, 07:28 PM by Dragan100.)
(12-24-2021, 09:43 AM)Braca Wrote: TI pušta u prodaju "polovinu" dvostrukog OPA1656:

https://www.ti.com/product/OPA1655?keyMatch=OPA1655

Komercializovan DS!
Ćak ga navode kao 2channel na osnovnoj stranici, javio jim grešku...
https://www.ti.com/product/OPA1655
:-)

Voltage noise se podaje tipično @1KHz, u potpunije DS stave i @100HZ, a neki čak @10Hz
Ako je u DS i graf V.noise/freq, da se mu nadje 1/freq koljeno....još bolje.
Strujni ulazni šum ranga ispod 10femptoA/SQRT(Hz), što kod Rgen>100K+ tek daje neki dodatak u TOT sume ulaznog naponskog šuma

TOT volt.noise.dens = SQRT { (in.volt.noise.dens) ^2 + ( Rgen*in.curr.noise.dens)^2}
ima i drugih interferencija šumova, ali ih za ovu namjeru ignorišemo, jer su prisutni uvijek...
tu podcrtavam traženje niskog sveukupnog ulaznog naponskog šuma kod visokih impedancij izvora 
(recimo MM zvučnica i 47K ulazni otpor u MM predamp)

OPA134 ako primerice pogledamo grafove V.noise/freq oba, ima bolje karakteristike sve do 10KHz+ (moja greška: OPA134 do 100Hz+, dok je OPA827 do 1KHz+ bolji)

--------------------------------------------------------------------------------------------------------------------------------

Odličan opamp, DiFET iako je to oznaka BB (BurrBrown) pa ga ne stavljaju, ogromnog OLG, niskog THD, dobar SR, .....jak strujni izlaz!




Dodatak:

Precrtao sam iz DSova input voltage noise density / freq za dotične BiFET opampove, tek ovako mogu se usporediti na istom nivou!


[Image: attachment.php?aid=36758]

LP
Dragan
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Macola Offline
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#85
02-15-2022, 10:30 PM
Još ga nema u prodaji kod velikih distributera, ali biće naredne godine.
Vrlo obećavajuće za svoju cenu...

https://www.ti.com/lit/gpn/ref70
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Macola Offline
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#86
03-15-2022, 07:36 PM
Nov instrumentacioni amp:

https://www.ti.com/lit/gpn/ina851
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savan Offline
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#87
04-21-2022, 07:52 PM (This post was last modified: 04-21-2022, 08:02 PM by savan.)
Novi AKM flagship DAC u najavi, bice ga krajem godine u prodaji!
https://www.akm.com/eu/en/about-us/news/...-ak4499ex/
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me[R]a Offline
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#88
05-06-2022, 10:23 AM
AVRF Series ESD Notch Filters
TDK’s AVRF series filters are ideal for audio equipment with low sound distortion and high sound quality

https://www.digikey.com/en/product-highl...ewodYBMHvQ
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me[R]a Offline
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#89
07-26-2022, 09:41 AM
[Image: pw-14-tssop.png]

B is for better: Modernizing our quad-channel standard op amps with LM324B and LM2902B

Meet the modern quad channel op amp for cost-constrained designs - LM324B and LM2902B, featuring improved precision, wider supply voltage, higher ESD ratings, and TI’s latest manufacturing technology.

Learn more
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mikikg Offline
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#90
11-14-2022, 04:09 AM
Nekoliko zanimljivih IC:

UCC25800-Q1 Ultra-low EMI Transformer Driver for Isolated Bias Supplies (max 9W)
https://www.ti.com/lit/ds/symlink/ucc25800-q1.pdf

LT6110 Cable/Wire Drop Compensator (Improve Voltage Regulation to a Remote Load by 10×)
https://www.analog.com/media/en/technica...6110fa.pdf

MAX16163 nanoPower On/Off Controller with Programmable Sleep Time
https://datasheets.maximintegrated.com/e...X16164.pdf

Si8941/46/47 Isolated Delta-Sigma Modulator for Current Shunt Measurement
https://www.skyworksinc.com/-/media/SkyW...asheet.pdf

STNRG388A Digital controller for power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL
https://www.st.com/content/ccc/resource/...179358.pdf

STNRG011A Digital combo multi-mode PFC and time-shift LLC resonant controller
https://www.st.com/resource/en/datasheet/stnrg011a.pdf

TEA2208T Active bridge rectifier controller
https://www.nxp.com/docs/en/data-sheet/TEA2208T.pdf
TEA2209T Active bridge rectifier controller
https://www.nxp.com/docs/en/data-sheet/TEA2209T.pdf
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Gosha Offline
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#91
11-14-2022, 10:47 AM
Mozda nije najmodernija ali meni veoma interesantna komponenta:

https://www.silabs.com/documents/public/.../AN854.pdf
https://www.mouser.com/datasheet/2/368/t...336907.pdf

Napon napajanja od 0.8V do 2.5V i struja potrosnje samo 1.5uA, idealno za baterijske aplikacije.
Novac je sredstvo a ne cilj.
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mikikg Offline
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#92
11-15-2022, 04:07 PM
(11-14-2022, 10:47 AM)Gosha Wrote: Mozda nije najmodernija ali meni veoma interesantna komponenta:

https://www.silabs.com/documents/public/.../AN854.pdf
https://www.mouser.com/datasheet/2/368/t...336907.pdf

Napon napajanja od 0.8V do 2.5V i struja potrosnje samo 1.5uA, idealno za baterijske aplikacije.

U DS su više puta spomenuli LM10 kao zanimljiv spoj reference + OP-AMP ali je zanimljivo da LM10 i dalje ima najniži napon reference koji sam video do sad, svega 0.2V što je interesatno za strujne/shunt monitore i regulaciju.

Ima jos par komponenti po sličnom principu ali su sve uglavnom sa internom referencom od 1.25V ili 2.5V, tj bukvalno imaju integrisan TL431 a kada se na to sve doda još i optocoupler onda se dobije nešto poput FOD2741, odlična kombinacija referenca+op+optocoupler u jednom 8 pin kućištu.
Taj FOD je iskorišćen u forumskom LLC da radi kompletan izolovan NFB po naponu, vrlo praktična komponenta.
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Bocko Offline
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#93
02-13-2023, 12:05 PM
https://linearsystems.com/lsdata/files/2...v%20A2.pdf
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progster Offline
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#94
05-31-2023, 10:16 AM
https://www.we-online.com/en/components/...PLE_FOLDER

Odlična stvar za neka brza oklapanja osetljivih delova, dobio par semplova nedavno...
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mikikg Offline
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#95
05-31-2023, 10:17 AM
^^^
A jel ima negde da se nabavi samo takvo kućiste metalno malo ali da ima izolovane izvode, kao prazna kutica za OCXO?
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Braca Offline
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#96
05-31-2023, 12:07 PM
(05-31-2023, 10:16 AM)progster Wrote: https://www.we-online.com/en/components/...PLE_FOLDER
Odlična stvar za neka brza oklapanja osetljivih delova, dobio par semplova nedavno...
Ovo je san snova za rad na prototipovima, ail i dalje od toga.

Puno hvala za link!
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Braca Offline
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#97
05-31-2023, 12:48 PM
(05-31-2023, 10:17 AM)mikikg Wrote: ^^^
A jel ima negde da se nabavi samo takvo kućiste metalno malo ali da ima izolovane izvode, kao prazna kutica za OCXO?
Ja sam za LNA i sl. koristio ovo:
https://www.tekogehause.de/en/products/family/RF

Izvode moraš da uradiš sam...
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Braca Offline
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#98
09-21-2023, 10:20 AM
LT3097: vrhunski poz. i neg. regulator u istom kućištu, LDO, šum oko 2nV/rtHz, lansiran u martu 2023.
https://www.analog.com/media/en/technica...lt3097.pdf

Mislim da ovako nešto još nije viđeno u IC obliku, taj nivo šuma nema ni jedan drugi IC regulator, to smo imali kod AdaptiveShunt-a.

Na žalost, EVM košta preko 150 evra, a kod Kineza još nema gotovih modula.
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Braca Offline
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#99
11-16-2023, 09:26 AM
Pojavila se poboljšana verzija dobrto poznatog dif. pojačavača OPA1632:
https://www.ti.com/lit/ds/symlink/opa163...52FOPA1633

Drugi i treći harmonik na 1kHz na -150dBc, v. Fig. 6-7 do 6.11 u DS.

Cena je oko 40% viša u odnosu na 1632.
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savan Offline
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#100
11-16-2023, 07:28 PM
Da to je taj sto ide u novi Draganov preamp kao zamena za stari opa1637 I/V, postoji i THS2630 koji bi trebao da je isto ili vrlo slicno kao opa1633
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