The cut-off frequency of the transimpedance amplifier (current-to-voltage converter) is theoretically 1/(2πRC) where R is 1.5 kohm without and 1 kohm with the extra resistor and C is 0 nF, 1 nF or 1.5 nF, depending on what capacitor is mounted. That's just over 100 kHz with 1 kohm and 1.5 nF.
The whole DAC's cut-off frequency is also determined by the FDNR filter, the so-called zeroth order hold function of the DAC and whatever filtering occurs on the digital side.
The whole DAC's cut-off frequency is also determined by the FDNR filter, the so-called zeroth order hold function of the DAC and whatever filtering occurs on the digital side.
