Sensor arrays, method for operating a sensor array and a computer program for performing a method for operating a sensor array

Sensor array comprising:

• a base for providing a probe signal;
• a plurality of modular recording sites, wherein each modular recording site of the plurality of modular recording sites comprises,
• a CMOS substrate,
• at least one sensor element configured for receiving an analog signal,
• an in-situ analog-to-digital converter configured for converting the analog signal into a digital sensor signal and
• a communication interface configured to provide the digital sensor signal to the base;
• wherein the communication interfaces of the plurality of modular recording sites are connected serially with respect to each other and to the base;
• wherein each in-situ analog-to-digital converter is configured for operating in a first operating mode for performing a first quantization of the analog signal using a first quantization setting and to acquire a residual error from the first quantization;
• and for operating in a second operating mode for performing a second quantization of the residual error using a second, different quantization setting for a same element of the analog-to-digital converter.