A digital filter for processing at least one input signal is described. The digital filter includes at least two filter parts that are separately formed from each other. The at least two filter parts are configured to process the at least one input signal in parallel which is received by the digital filter. A first filter part of the at least two filter parts is implemented in a first chip. A second filter part of the at least two filter parts is implemented in a second chip. Further, a measurement instrument is described.