A321
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Total 14000
Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Human Factors
During a visual descent to Denver; landing south; we were on downwind and cleared for the visual approach. As we planned our descent; the Captain entered a lower altitude [than] what I wanted as we were on an open descent. When I noticed the error; I turned the autopilot off and flight directors shortly after. ATC issued an altitude alert during this time. I leveled off; continued the approach visually; and descended once we reached the appropriate descent angle. This resulted in a normal landing. Captain entered an altitude at a midpoint inside the FAP (Final Approach Point) by mistake.
A321 First Officer reported ATC issued a low altitude alert after the Captain entered an improperly low altitude on a visual descent into DEN.