RAK12020 WisBlock Light Sensor Datasheet
Overview
Figure 1: RAK12020 WisBlock Light SensorDescription
RAK12020 is a WisBlock Light Sensor module that extends the WisBlock system with an AMS TSL25911FN Light Sensor. It comes with a ready-to-use software library and tutorial, making it simple to build an ambient light-intensity data acquisition system.
The ambient light intensity data is interfaced via I2C. Additionally, RAK12020 can be mounted to the sensor slot of the WisBlock Base board.
Product Features
-
Sensor specifications
- Very high sensitivity light-to-digital converter
- Approximates human eye response
- I2C interface
- Two internal interrupt source
- Low power 3.0 uA sleep state
- 3.3 V power supply
-
Size
- 10 x 10 mm
Specifications
Overview
Mounting
Figure 2 shows the mounting mechanism of the RAK12020 module on a WisBlock Base board. The RAK12020 module can be mounted on the slots: A, C, D, E & F.
Figure 1: RAK12020 WisBlock Light Sensor MountingHardware
The hardware specification is categorized into five parts. It shows the chipset of the module and discusses the pinouts, sensors, and the corresponding functions and diagrams. It also covers the electrical and mechanical parameters, including the tabular data of the functionalities and standard values of the RAK12020 WisBlock Light Sensor.
Chipset
| Vendor | Part Number |
|---|---|
| AMS | TSL25911FN |
Pin Definition
The RAK12020 WisBlock Light Sensor comprises a standard WisBlock connector. The WisBlock connector allows the RAK12020 module to be mounted to a WisBlock Base board. The pin order of the connector and the pinout definition is shown in Figure 3.
Figure 1: RAK12020 WisBlock Light Sensor Pinout DiagramOnly the I2C-related pins, VDD, and GND are connected to this module. INT pin is the interrupt output.
INT pin at Pin 12/13 will depend on where sensor slot the module is plugged in. The table shows the compatible pins used by different sensor slots:
INT (Interrupt Output Pin)
| Slot A | Slot C | Slot D | Slot E | Slot F |
|---|---|---|---|---|
| IO1 | IO3 | IO5 | IO4 | IO6 |
Electrical Characteristics
Recommended Operating Conditions
| Symbol | Description | b Condition | Min. | Nom. | Max. | Unit |
|---|---|---|---|---|---|---|
| 3V3_S | Operating Voltage | Input voltage must within this range | 2.7 | 3.3 | 3.6 | V |
| Isd | Shutdown current | Sleep state - no I2C activity | - | 2.3 | 4 | uA |
| IDD | Operation mode current | Active | - | 275 | 325 | uA |
Mechanical Characteristics
Board Dimensions
Figure 4 shows the dimensions and the mechanic drawing of the RAK12020 module.
Figure 1: RAK12020 WisBlock Light Sensor Mechanic DrawingWisConnector PCB Layout
Figure 1: WisConnector PCB footprint and recommendationsSchematic Diagram
Figure 6 shows the schematic of the RAK12020 module.
Figure 1: RAK12020 WisBlock Light Sensor schematics
