Bo Deadly
Well-known member
Has anyone heard of this op amp?
http://www.ti.com/lit/ds/symlink/opa2197.pdf
Datasheet doesn't say much about audio, it's mosfet input and the example app is all about data acquisition and such. But unless I'm missing something this looks like a pretty great amp:
1mA / amp quiescent current
+-65mA output
very low offset
low noise / distortion
wide supply range
xtra input protection / emi filtering / thermal protection
lots of different packages with 1, 2 and 4 amps
drives capacitive load
high Z input
rail-to-rail diff input range using complementary mosfet input pairs
no phase reversal
One OPA4197 could make a very good battery powered headphone amp.
It is $3 though. And it looks like it needs supply bypass caps at the pins so it's not a drop-in replacement for TL0X which is the standard low power high Z amp.
http://www.ti.com/lit/ds/symlink/opa2197.pdf
Datasheet doesn't say much about audio, it's mosfet input and the example app is all about data acquisition and such. But unless I'm missing something this looks like a pretty great amp:
1mA / amp quiescent current
+-65mA output
very low offset
low noise / distortion
wide supply range
xtra input protection / emi filtering / thermal protection
lots of different packages with 1, 2 and 4 amps
drives capacitive load
high Z input
rail-to-rail diff input range using complementary mosfet input pairs
no phase reversal
One OPA4197 could make a very good battery powered headphone amp.
It is $3 though. And it looks like it needs supply bypass caps at the pins so it's not a drop-in replacement for TL0X which is the standard low power high Z amp.