Op-amp søges

skrev i en meddelelse news: snipped-for-privacy@e39g2000hsf.googlegroups.com... 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.

mvh JBH

Hej Benny

Jeg fandt engang disse:

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

LPV511 RRIO 1uA 27kHz 2,7-12V:

Meget hurtig:

LMH6647 RRIO 0,65mA 55MHz shutdown pin 2,5-12V:

hilsen

Glenn

Hej Benny

Jeg fandt engang disse:

-

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

LPV511 RRIO 1uA 27kHz 2,7-12V:

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:

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

Hej Benny

Og her er en endnu hurtigere:

LMH6618 RRIO 1,25mA 130MHz shutdown pin 2,7-11V:

Citat: "... The input common mode range extends 200 mV beyond the supply rails. ..."

hilsen

Glenn

Hej Benny

Bemærk at disse op-amp er PowerWise produkter:

PowerWise® Solutions:

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

OK. Der var mange. Jeg har gennemg=E5et databladene.

TS461/2/4 ser ud til at v=E6re den best egnede. Den er ogs=E5 i et dejlig lille SOT23-5 hus.

H=E5ber at der er andre end DigiKey der kan skaffe den.

Tak til alle for hj=E6lpen.

Benny