A low-noise flip-chip package, comprising: a carrier substrate having first and second opposing main faces; and a flip-chip substrate connected in a face-down manner onto the first main face of the carrier substrate via a connection array, wherein: the flip-chip substrate comprises at least first and second circuitry portions spaced apart from one another; the flip-chip substrate comprises a substrate-contact boundary located between the first and second circuitry portions; and each of the first circuitry portion, the second circuitry portion and the substrate-contact boundary has its own separate signal-reference connection extending via a respective connection of the connection array through the carrier substrate to a respective electrical contact at the second main face of the carrier substrate for connection to a common signal-reference element in an external circuit.