Op-amp søges

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Hej

Jeg sF8%ger en opamp, men har problemer med at finde den rigtige.

FF8%lgende data er F8%nskvE6%rdige.

Forsyning. 5 volt

Kanaler: 1 - 2 (4 kan ogsE5% gE5%)

Output: Som en LM324

Input: fra +rail til (-rail - 200 mV) (Igen som LM324 men den har ikke
op til +rail)

Arbejdsfrq: 50 Hz

Benny

Re: Op-amp søges

Hej

Jeg søger en opamp, men har problemer med at finde den rigtige.

Følgende data er ønskværdige.

Forsyning. 5 volt

Kanaler: 1 - 2 (4 kan også gå)

Output: Som en LM324

Input: fra +rail til (-rail - 200 mV) (Igen som LM324 men den har ikke
op til +rail)

Arbejdsfrq: 50 Hz



Et par forslag.

http://parts.digikey.dk/1/1/365036-ic-op-amp-rail-rail-14-soic-ts464cdt.html

http://www.national.com/mpf/LM/LMC6464.html

mvh
JBH



Re: Op-amp søges
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Hej Benny

Jeg fandt engang disse:

Langsom - 27 kHz i båndbredde er vel nok ;-) :

LPV511 RRIO 1uA 27kHz 2,7-12V:
http://www.national.com/pf/LP/LPV511.html

Meget hurtig:

LMH6647 RRIO 0,65mA 55MHz shutdown pin 2,5-12V:
http://www.national.com/mpf/LM/LMH6647.html

hilsen

Glenn

Re: Op-amp søges [ Afsporet op-amp?: Input beyond rails? ]
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Hej Benny

Jeg fandt engang disse:

-

Meget langsom - 27 kHz i båndbredde er vel nok ;-) :

LPV511 RRIO 1uA 27kHz 2,7-12V:
http://www.national.com/pf/LP/LPV511.html
Citat: "...
LPV511 - micropower Rail-to-Rail Input and Output Operational Amplifier
from the PowerWise® Family
...
Rail-to-rail input
...
Rail-to-rail output...100 mV from rails
...
The LPV511 has an input range that includes both supply rails for ground
and high side battery sensing applications. The LPV511 output swings
within 100 mV of either rail to maximize the signal's dynamic range in
low supply applications. In addition, the output is capable of sourcing
650 µA of current when powered by a 12V battery.
..."

-

Meget hurtig - men bruger 650 gange så meget i strøm - og 50uA i
shutdown mode:

LMH6647 RRIO 0,65mA 55MHz shutdown pin 2,5-12V:
http://www.national.com/mpf/LM/LMH6647.html
Citat: "...
LMH6647 - 2.7V, 650µA, 55MHz, Rail-to-Rail Input and Output Amplifiers
with Shutdown Option
...
Input common mode voltage...0.3V beyond rails ("afsporet op-amp?" :D :D
:D :D )
...
Output voltage swing...20mV from rails
...
Input common mode voltage range exceeds either supply by 0.3V, enhancing
ease of use in multitude of applications where previously only inferior
devices could be used. Output voltage range extends to within 20mV of
either supply rails, allowing wide dynamic range especially in low
voltage applications. Even with low supply current of 650µA/amplifier,
output current capability is kept at a respectable ±20mA for driving
heavier loads. Important device parameters such as BW, Slew Rate and
output current are kept relatively independent of the operating supply
voltage by a combination of process enhancements and design architecture.
..."

hilsen

Glenn

Re: Op-amp søges [ Hurtigere afsporet op-amp?: Input beyond rails and faster? ]
Hej Benny

Og her er en endnu hurtigere:

LMH6618 RRIO 1,25mA 130MHz shutdown pin 2,7-11V:
http://www.national.com/pf/LM/LMH6618.html
Citat: "...
The input common mode range extends 200 mV beyond the supply rails.
..."

hilsen

Glenn

Re: Op-amp søges [ PowerWise® Solut ions ]
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Hej Benny

Bemærk at disse op-amp er PowerWise produkter:

PowerWise® Solutions:
http://www.national.com/analog/powerwise/

http://www.national.com/analog/powerwise/metrics
Citat: "...
As the need for more energy-efficient equipment increases, similar
methods will be required to determine the best power-to-performance
ratio of a component or system. National Semiconductor has developed
product efficiency metrics as a means for measuring a device’s power
consumption to its level of performance. The top tier of products within
these metrics are classified as members of the PowerWise® product
family. Table 1 shows the various component families and the associated
metrics and performance thresholds used to select the highest
performance-to-power ratio products.
..."

hilsen

Glenn


Re: Op-amp søges [ PowerWise® Solutions ]
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OK.
Der var mange.  Jeg har gennemgE5%et databladene.

TS461/2/4 ser ud til at vE6%re den best egnede. Den er ogsE5% i et dejlig
lille SOT23-5 hus.

HE5%ber at der er andre end DigiKey der kan skaffe den.

Tak til alle for hjE6%lpen.


Benny

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