Analyte sensor with spatially distributed photodetectors, spatially distributed light sources, and/or co-located light sources

A sensor comprising:

• a first light source comprising a first light emitting active area;
• a second light source comprising a second light emitting active area;
• and
• a substrate, wherein the first light source is mounted on or fabricated in the substrate, the second light source is mounted on or fabricated in the substrate adjacent to the first light source, and the first and second light sources are oriented such that the first and second light emitting active areas are co-located.

A sensor comprising:

• a substrate;
• and
• a column of photodetectors mounted on or fabricated in the substrate, wherein:
• the column of photodetectors includes first photodetectors configured to detect light in a first wavelength range and second photodetectors configured to detect light in a second wavelength range that is different from the first wavelength range,
• none of the first photodetectors of the column of photodetectors is adjacent to another of the first photodetectors,
• none of the second photodetectors of the column of photodetectors is adjacent to another of the second photodetectors,
• each photodetector of the column of photodetectors includes an anode and a cathode,
• the anodes of the first photodetectors are connected together,
• the cathodes of the first photodetectors are connected together,
• the anodes of the second photodetectors are connected together,
• the cathodes of the second photodetectors are connected together,
• the first photodetectors generate a single first output signal from the column of photodetectors, and
• the second photodetectors generate a single second output signal from the column of photodetectors.