I'm building a dac based on a pre-exising circuit. The Iouts of the dac are followed by opa627s for the I/V conversion. This is followed by an RC low pass filter (series resistor followed by a decoupling capacitor).

The resistor is 1kohm, and the capacitor is 330pf and I need to know what the -3dB point is. Can someone please help me with the math here and also post the formula for working this out? Thanks.

The resistor is 1kohm, and the capacitor is 330pf and I need to know what the -3dB point is. Can someone please help me with the math here and also post the formula for working this out? Thanks.