Which of the following is not an analog sensor

Given below are four different types of sensors mentioned. Of given sensors which of the following is not an analog sensor:

1. LDR
2. Potentiometer
3. DS1620
4. Linear hall sensor

Correct answer: 3. DS1620

Of the mentioned devices, the DS1620 is a Digital Thermometer. DS1620 Thermostat provides 9–bit temperature readings which indicate
the temperature of the device. (Source: Maxim Integrated)

Of the majority of sensors available are analog devices whose values are converted to digital values by analog-to-digital converters (ADC).

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