Morozov,
OPA1644 is a superior device. Almost all quad op amp have the same pinout so many op amps including OPA1644 will drop in with no other changes.
The only noticeable difference between TL084C and OPA1644 usage is input common mode range.
TL084C…
Part Number: OPA627 Other Parts Discussed in Thread: OPA1644 , BUF634 , , PCM1792A , OPA1622 , OPA1612 , OPA1688 I was interested in using the OPA627 (and maybe a BUF634) as the output stage of my DAC/headphone amp. I plan on using the OPA1644 as the Trans…
First, I have to offer a couple of corrections to my post above.
1. My simulation of the output impedance of the volume control was in error. While there is some change in output impedance, it is very small. Output impedance simulates well below 100mΩ…
Hi Willie,
I don't see that we have one op amp that meets all of your criteria directly, although the TLE2082 looks like a really good choice and possibly the best fit.
Based on your key functional requirement for the Iccq to be less than 10mA for…
Other Parts Discussed in Thread: INA103 , OPA1644 , OPA140 , OPA1642 , OPA211 , OPA1611 , OPA2604 , OPA604 I couldn't find in TI portfolio high voltage high performance stand-alone opamp which is similar to output opamp A3 inside INA103. Does it exist at all…
Hi Dinesh,
If I understood your issues correctly, here is what I did.
1. Add input and output protection for OPA1664. 5kOhm will limit the input and output current for the op amp and DAC.
2. Add TVS at Vcc and Vee at 16V (momentary short). If the output…
It is OPA2209 also suitable to replace 33078? What difference of sounding 1642/1662? In this preamps also two TL074 and one TL072, can you recommend any alternative with more "audiophile" sounding?
Hi Sam,
It is good that that you have some options. One other audio op amp that I'd like to mention is the OPA1642. I think it is worthy of consideration too.
Regards, Thomas
PA - Linear Applications Engineering
