Sharp Analog Distance Sensor 20-150cm

The GP2Y0A02 is the longest-range optical distance sensor we carry, featuring a detection range of 8" to 60". The high maximum detection distance makes this sensor a viable alternative to sonar in some applications. The distance is indicated by an analog voltage, making this sensor very easy to use.

The Sharp distance sensors are a popular choice for many projects that require accurate distance measurements. This IR sensor is more economical than sonar rangefinders, yet it provides much better performance than other IR alternatives. Interfacing to most microcontrollers is straightforward: the single analog output can be connected to an analog-to-digital converter for taking distance measurements, or the output can be connected to a comparator for threshold detection. The detection range of this version is approximately 20 cm to 150 cm (8" to 60").

The GP2Y0A02 uses a 3-pin JST connector that connects to the 3-pin JST cable for Sharp distance sensors (not included). It is also simple to solder three wires to the sensor where the connector pins are mounted. When looking at the back, the three connections from left to right are power, ground, and the output signal.

Features
Operating voltage: 4.5 V to 5.5 V
Average current consumption: 33 mA (typical)
Distance measuring range: 20 cm to 150 cm (8" to 60")
Output type: analog voltage
Output voltage differential over distance range: 2.0 V (typical)
Response time: 38 ± 10 ms
Package size: 29.5 x 13 x 21.5mm (1.16 x 0.5 x 0.85in.)
Weight: 4.8 g (0.17 oz)

Linearizing the Output
The relationship between the sensor's output voltage and the inverse of the measured distance is approximately linear over the sensor’s usable range. The GP2Y0A02YK data sheet contains a plot of analog output voltage as a function of the inverse of distance to a reflective object. You can use this plot to convert the sensor output voltage to an approximate distance by constructing a best-fit line that relates the inverse of the output voltage (V) to distance (cm).

0-PL1137


Data Sheet