Hi,
I am using the TLV9004-Q1 in a photodiode amplifier setup, and am not sure how to treat the output impedance under quasi-DC conditions. The datasheet states the amplifier has ~1200 Ohm output resistance at f = 100kHz and this drops to approximately 1100 ohm down to f = 1kHz. The plots do not show what happens at lower frequencies however. Furthermore, in the application section, a photodiode amplifier example is given using resistor values close to this 1200 ohm output impedance, but this is not taken to account in the design equations. I use this as an example to ask if the 1200Ohm output resistance is an important design condition to consider when using resistors in the 1e3 Ohm range with low frequencies, and what does the output impedance taper become at low frequencies close to DC? If it remains in this approximate value range, then it makes good sense to simply subtract this value from the resistor used for feedback.
Thank you