Current-mode analog-to-digital converter systems, devices and methods for multi-sensing

A device, comprising:

• a plurality of external connections, including a first sensor connection configured to source a sensor current from a sensor device;
• and
• analog circuits formed with a substrate, including at least an analog comparator circuit and a plurality of analog switches, the analog circuits configurable to:
• couple the first sensor connection to a first input of the analog comparator circuit;
• generate at least one balance current with a balance current generator, wherein the balance current generator comprises a plurality of first analog switches that modulate the balance current;
• and
• couple, with a second analog switch, the balance current generator to the first input of the analog comparator circuit;
• and
• digital circuits formed with the substrate and configurable into at least:
• switch control logic that generates a plurality of switch control signals in response to an output of the analog comparator circuit and a modulation clock signal, wherein a first switch control signal controls at least a first analog switch of the plurality of first analog switches, a second switch control signal controls at least a second analog switch of the plurality of first analog switches, and at least one of the first switch control signal and the second switch control signal controls the second analog switch;
• and
• signal processing circuits configured to generate a multi-bit digital value from at least a bit stream output by the analog comparator circuit, the multi-bit digital value corresponding to the sensor current.

A system, comprising:

• a sensor configured to generate a sensor current;
• and
• a configurable mixed signal integrated circuit (IC) device comprising:
• a plurality of device connections, including a first connection coupled to receive the sensor current;
• analog circuits including:
• at least one analog comparator circuit coupled to the first connection;
• a balance current generator configured to provide at least one balance current, the balance current comprising a first plurality of analog switches configured to modulate the balance current and a second analog switch to couple the balance current generator to the first input of the at least one analog comparator circuit, wherein the second analog switch is configured to modulate the sensor current with a first balance current of the at least one balance current;
• and
• digital circuits including:
• a switch signal generator that generates a plurality of switch control signals in response to an output of the at least one analog comparator circuit and a modulation clock signal, wherein a first switch control signal controls at least a first analog switch of the plurality of first analog switches, a second switch control signal controls at least a second analog switch of the plurality of first analog switches, and a third switch control signal controls the second analog switch;
• and
• digital processing circuits configured to generate a multi-bit conversion value corresponding to the sensor current in response to the output of the at least one analog comparator circuit.