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The DC voltage observed at VDETECT is 2.52V (Figure 6), which causes the MAX9063's output to assert low. Pressing the hook switch grounds VDETECT, allowing the output to be pulled high by an external 10kΩ pullup resistor. Thus, the MAX9063 comparator in its tiny 1mm × 1mm CSP package is well suited for detecting hook switches and accessories. The MAX9028 comparator family is also suitable for these applications.
The DC voltage observed at VDETECT is 2.52V (Figure 6), which causes the MAX9063's output to assert low. Pressing the hook switch grounds VDETECT, allowing the output to be pulled high by an external 10kΩ pullup resistor. Thus, the MAX9063 comparator in its tiny 1mm × 1mm CSP package is well suited for detecting hook switches and accessories. The MAX9028 comparator family is also suitable for these applications.
Summary
There is a common need for detecting jacks, headsets, and hook switches in portable applications. Dedicated comparators such as the MAX9063 and MAX9028 series devices are ideal for those applications, especially as they occupy very little real estate and consume negligible power. These comparators offer an economical solution for detection circuitry in portable applications.
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