Datasheet
Copyright 2005 - 2021 MaxBotix Incorporated Patent 7,679,996
I2CXL-MaxSonar
®
- EZ™ Series
Page 4
Web: www.maxbotix.com
PD11848k
MaxBotix Inc., products are engineered and assembled in the USA
Single Sensor Wiring Diagram
The I2C bus is a two wire interface that consists of a clock line and data line where each requires a pull-up resistor
attached to V+. Only one pull-up resistor is required each for the SCL and SDA lines per bus – not per sensor.
The I2C specification recommends a resistance value of 4.7 kΩ for 20-100kHz interfaces with good low inductance
routing. However, these specifications are for communication between chips on a singe PCB. If you have longer cable
lengths it is best to use lower value resistor, such as 1kΩ, and also to use properly shielded cables. Often I2C bus
problems can be fixed by doing one of the following: by using properly shielded cable or by decreasing the value of the
pull-up resistors. The I2CXL-MaxSonar-WR/WRC series is capable of sinking more current than the I2C specification
requires (15mA versus 3mA) so a much lower resistance value can be used. The voltage applied to the I2C lines should
be the same voltage that is applied to V+ of the sensor.
Multiple Sensor Wiring Diagram
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Selecting a I2CXL-MaxSonar-EZ Sensor
Different applications require different sensors. The I2CXL-MaxSonar-EZ product line offers varied sensitivity to allow
users to select the best sensor to meet their needs.
The diagram above shows how each product balances sensitivity and noise tolerance. This does not affect the pin outputs
or other sensor operation. To get a better view of how each sensor will function to targets of different sizes reference the
I2CXL-MaxSonar-EZ beam patterns.
Sensor Minimum Distance
For the MB1202 and MB1212 the sensor minimum reported distance is 25-cm. However, the I2CXL-MaxSonar-EZ will
range and report targets to the front sensor face. Large targets closer than 25-cm will typically range as 25-cm.
People Detection
Wide Beam
High Sensitivity
Best Balance
Large Targets
Narrow Beam
Noise Tolerance
Very Large Targets
Narrow Beam
Extreme Noise Tolerance
MB1202 MB1212 MB1222 MB1232 MB1242
SD
A
I2C Bus
Master
SC
GN
V+
I2CXL-MaxSonar-EZ Sensors
V+
GND
V+
GND
V+
GND
I2CXL-MaxSonar-EZ Sensor
I2C Bus Master
SDA
SCL
GND
V+
V+
GND