need a low noise op amp similar to the TL082. It must have similar gain, but I need lower power consumption, lower noise and a single supply chip (low Vcc preferred).
It must be available in a DIP package.
Any suggestions?
TIA
A
Do you need the same high-Z JFET type inputs? There are so many op-amps out there that you'll have to be a bit more specific in your requirements.
--- sam | Sci.Electronics.Repair FAQ Mirror:
Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org.
Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs.
LM6142 AD822 OP275
-- Jeg kan virkelig ikke se, hvad det skulle betyde, at forbinde en 0,1 mm X 1 mm tin-fyldt kobberbane i ét apparat med en anden 0,1 mm X 1 mm tinfyldt kobberbane i et andet apparat, via et sølvbelagt 4 mm2 polafhængigt højteknologisk kulfiberinfiltreret kabel til et astronomisk beløb.
Tro flytter ikke bjerge. Tro flytter kroner.
Hi Sam, good to hear from you.
The project is a VLF single frequency receiver, an improved version of the one at:
About half way down the page is a gif, click on it to see the full schematic.
I am interested in receiving signals at 17 kilohertz, which are radiating from a transmitter in the house. The transmitter is low power, as supplied by the manufacturer, it has a 90 foot range (with the manufacturers companion (black box) receiver. The transmitting antennas are 6 inch air coils with hundreds of turns of fine gauge wire, which is driven by an audio amp chip with the input frequency fixed at 17 kilohertz.
The manufacturers companion receiver runs on very expensive single source batteries that don't last long AND it doesn't have enough range to start with!
I want to use cheap laser pointer batteries, or small nicad button cells, which are a little pricey initially...but they pay off about the 4th time you recharge them:>:
I DO NOT think the high input impedance is necessary, but usually fet's and low input bias are associated with low noise op amps.
Regards,
A
Certainly not very complicated! Just cascaded X100 gain stages.
Companies like National, Texas Instruments, Maxim, Linear Technology, etc. have very good selection guides on-line. They also will supply free samples and most dual op-amps are pin compatible so you can try a few types if it turns out to be critical. I doubt that the TL082 was selected because of some fantastic specification - it was probably in someone's junk box! You don't need the Hi-Z input and even the low noise may not be terribly critical, but probably only trying them out will determine that for sure. Just stay away from really garbage op-amps like the LM358! :)
--- sam | Sci.Electronics.Repair FAQ Mirror:
Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org.
Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.