Part Number: OPA891 Tool/software: I'm contemplating using the OPA891 in a low-distortion audio source with a 50 Ω output impedance. I would like the OPA891 to survive if the output is shorted to ground, preferably indefinitely.
There is no…
Part Number: OPA891 Other Parts Discussed in Thread: OPA892 , , OPA2892 Hello Experts,
This board will be used for designing a probe for measuring switching currents of a high-speed SOC.
The input voltage range is expected as 250uV to 7.5mV.
OPA891 and…
Part Number: OPA891 Tool/software: The spec sheet says the Input Z in the differential mode is 6K.
I downloaded the TINA simulation example which in a non inverting buffer, (gain of 1) and inserted a 100k resistor in series with the plus input. Sure…
Part Number: OPA891 The OPA891 data sheet front-page "Applications" section cites "Professional Audio Amplifier" but the minimum recommended build-out resistance is 20R.
I assume the "Pro Amplifier" refers to a headphone amplifier…
Part Number: OPA891 Hi TI how is the THD and IMD graphs measured in the OPA891 datasheet? Figure 5-35 shows THD+n below -135dB and figure 5-36 IMD in the ballpart. i dont know any THD analyzer that can measure this low THD...
rgds
Kim
Good Afternoon Ignacio,
Thanks for getting back to me! I've switched out the Google Drive for a .zip containing all required materials, including the picture of my schematic.
Thanks for alerting me to the OPA891 slew rate issue. Looking back at Figure…
Hello James,
You can use the TINA-TI OPA891 model, as the properties of the single op-amp are the same for the dual op-amp.
www.ti.com/.../OPA891
As for PSPICE, you can use the base SPICE model in the TINA-TI macro as a SPICE block (library file) in PSPICE…
Hello Hanlin,
I do not see an immediate issue using the OPA891. Could you share a block diagram or circuit here?
As your waveforms are fairly slow, the slew rate of the OPA891 should not be an issue. Could you share your input signal to the OPA891?
Best…
Here is a search for opamps with Vn ≤ 1 nV√Hz: ti.com/amplifier-circuit/op-amps/products.html#7typ=0.69;1&sort=1130
The OPA2891/OPA891 already is the cheapest dual/single opamp.
