An input device, comprising: a plurality of sensor electrodes (120-1 to 120-n); and a processing system coupled with the plurality of sensor electrodes, the processing system comprising: a delta-sigma modulator comprising: one or more input nodes configured to receive a signal based on a sensor signal received from at least a first sensor electrode of the plurality of sensor electrodes; an integrator coupled with the one or more input nodes and configured to produce an integration signal; a quantizer coupled with an output of the integrator and configured to quantize the integration signal; and a feedback digital-to-analog converter controlled based on the quantization signal generated by the quantizer; the processing system comprises further: a digital filter coupled with an output of the delta-sigma modulator and configured to mitigate a quantization noise of the quantizer; characterized in that the integrator is a passive integrator which comprises a capacitance of the first sensor electrode. a plurality of sensor electrodes (120-1 to 120-n); and a processing system coupled with the plurality of sensor electrodes, the processing system comprising: a delta-sigma modulator comprising: one or more input nodes configured to receive a signal based on a sensor signal received from at least a first sensor electrode of the plurality of sensor electrodes; an integrator coupled with the one or more input nodes and configured to produce an integration signal; a quantizer coupled with an output of the integrator and configured to quantize the integration signal; and a feedback digital-to-analog converter controlled based on the quantization signal generated by the quantizer; the processing system comprises further: a digital filter coupled with an output of the delta-sigma modulator and configured to mitigate a quantization noise of the quantizer; characterized in that the integrator is a passive integrator which comprises a capacitance of the first sensor electrode. a delta-sigma modulator comprising: one or more input nodes configured to receive a signal based on a sensor signal received from at least a first sensor electrode of the plurality of sensor electrodes; an integrator coupled with the one or more input nodes and configured to produce an integration signal; a quantizer coupled with an output of the integrator and configured to quantize the integration signal; and a feedback digital-to-analog converter controlled based on the quantization signal generated by one or more input nodes configured to receive a signal based on a sensor signal received from at least a first sensor electrode of the plurality of sensor electrodes; an integrator coupled with the one or more input nodes and configured to produce an integration signal; a quantizer coupled with an output of the integrator and configured to quantize the integration signal; and a feedback digital-to-analog converter controlled based on the quantization signal generated by the quantizer; the processing system comprises further: a digital filter coupled with an output of the delta-sigma modulator and configured to mitigate a quantization noise of the quantizer; characterized in that the integrator is a passive integrator which comprises a capacitance of the first sensor electrode.