I'm trying to reuse an existing board. The prior application used an NE5532 where the first amp has a gain/lowpass filter and the second was just a buffer to invert the output. It's good for 50KHz.
Need to swap out the amp with one that can get me 500KHz or as close as possible for different application. First amp has R1=1K and R2=125k with 2.5pF cap for the highest gain setting. The 1x gain setting uses 1 R2=1k with 300pF cap. Any suggestions on a part the can output a 500KHz signal? When no signal is present I need to the noise to be under 20mVpp.
I also need it to be in 8-PDIP package.
Any help would be appreciated...