Hi Tamara,
The supply rails are +15V -15V nominal.
The input signal come from an OPA1664, same supply rails (+-15V), signal max level 14dBu, 20-20KHz (audio signal). No (or very low) DC.
The output signal expected is the same from input: it isn…
Other Parts Discussed in Thread: TPA6111A2 , OPA1664 Hi,
We are using OPA1664 opamp as an 8th order low pass filter, having a sharp cut off. Finally, the audio is sent to the headphone amplifier TPA6111A2.
We are thinking of using audio codec and…
Hello Stephan,
No, the minimum OPA1679 operating supply voltage is as specified in table 6.3. Therefore, it cannot operate with a single +3.3 V supply.
There is another TI quad audio Op amp that can be powered by a single supply as low as +3 V,…
Fair enough, thank you for the additional information about the desire to further increase dynamic range of the front-end.
OPA1604 is our lowest noise quad, with OPA1664 in 2nd. The OPA1654 is a good quality CMOS offering as well.
There are more choices…
Hi Jose ,
I am already using OPA1664 as a pre-amplifier and all the four op-amps are used for filtering, and then for the next stage I am using TPA6203A1/ TPA6205A1 for audio amplification, so where in the signal chain volume control should be used…
Hi Marc,
Common mode ranges generally refer to the AC characteristics or the signal swing level between the inputs before non-linearity takes into effect due to the signal swings proximity to the supply rails. It does not account for DC offsets between…
Hi Sampath,
THe supply voltage will limit the number of suitable parts. What about the OPA1612? The OPA1664 may also work.
I am using our parametric search tool for precision amplifiers with bandwidth around 20MHz and 22V or higher supply voltage…
Other Parts Discussed in Thread: OPA1662 , OPA1664 , LM833 , LM833-N , LM837 , OPA1652 Unfortunately some of the LM devices got caught up in an unavoidable technology process-node end of life. fortunately we can support orders for the device through the…
Vladimir,
First, there is no such thing as low cost bipolar op amp and no bipolar output can swing within 10mV of either rail since typical VCE saturation voltage is around 300mV at 25 deg C; that is UNLESS you are willing to use a pull-down resistor…
Well Jeff, we use about 100K pcs of LM837 per year.
Some of those op amps you mention are nice op amps but the cynical engineer
might notice that they are three to four times the price of the LM837 and one might
infer that is the true reason for…
