Hi all,
I've been on the hunt for a good RRIO opamp for battery-powered applications, and the TLV9152 is looking quite good from the spec sheet:
https://www.ti.com/product/TLV9152
Thanks,
Neil
I've been on the hunt for a good RRIO opamp for battery-powered applications, and the TLV9152 is looking quite good from the spec sheet:
https://www.ti.com/product/TLV9152
- low offset/drift (typ.125uV, 0.3uV/C)
- low distortion (0.00021%)
- low noise (11nV/rt.Hz @ 1kHz
- low power (c.500uA/amp)
- reasonable cost ($0.354/1k)
Thanks,
Neil
Its an automotive chip and its very cheap .
The specs look good but you will need an ESD strap=zap strap as its immunity to being "zapped " isn't of the highest order .
While a figure of 2000V is mentioned ( human body ) this is pretty low in relation to walking across a nylon carpet in a low humidity room ( under 40% RH) builds up a much higher charge in the human body.
But at such a low price probably that's not a worry if a few are blown.
At the end of the day its down to what it sounds like not its specifications ---just ask D,Self .
Car audio is its biggest production seller --try it using an IC socket so that you can compare it with older audio chips.
The specs look good but you will need an ESD strap=zap strap as its immunity to being "zapped " isn't of the highest order .
While a figure of 2000V is mentioned ( human body ) this is pretty low in relation to walking across a nylon carpet in a low humidity room ( under 40% RH) builds up a much higher charge in the human body.
But at such a low price probably that's not a worry if a few are blown.
At the end of the day its down to what it sounds like not its specifications ---just ask D,Self .
Car audio is its biggest production seller --try it using an IC socket so that you can compare it with older audio chips.
I think that one would do fine. Is it for audio?
Also, everyone should be using ESD mats and wrist straps when doing electronics work. An op amp will survive ESD better than a MOSFET.
Also, everyone should be using ESD mats and wrist straps when doing electronics work. An op amp will survive ESD better than a MOSFET.
ESD: The quoted 2000V seems quite common across many opamps from a variety of vendors.
Yeah I'll get some and see how they sound.
Thanks,
Neil
Yeah I'll get some and see how they sound.
Thanks,
Neil
I'm always curious when someone needs rail-to-rail input on an op-amp for audio. I always think of those as current sense amps, and the like. I guess it is good to get all the signal you can.
That particular op amp has my favorite topology. I used a similar one for a headphone amp / line driver I designed at TI. In that case, for lower noise, both polarity of inputs remained on during the entire common-mode swing, which was limited by the feedback gain of 5. Technically, that was an RRIO amp, but we only cared about the output swing.
Those have an offset bump near the top of the CM swing, so beware if using as a unity gain buffer. At that signal level, I doubt anyone would be able to hear it, and it's almost at clipping anyway.
That particular op amp has my favorite topology. I used a similar one for a headphone amp / line driver I designed at TI. In that case, for lower noise, both polarity of inputs remained on during the entire common-mode swing, which was limited by the feedback gain of 5. Technically, that was an RRIO amp, but we only cared about the output swing.
Those have an offset bump near the top of the CM swing, so beware if using as a unity gain buffer. At that signal level, I doubt anyone would be able to hear it, and it's almost at clipping anyway.
They also like the load to be around 10K, instead of 2K or less, which is consistent with a low power op-amp, and also a good idea for battery powered circuits.