RAK12021 WisBlock RGB Sensor Module Datasheet
Overview
Description
RAK12021 is a WisBlock RGB Sensor that extends the WisBlock system which is based on TCS37725FN from AMS. The Red, Green, Blue, and Clear (RGBC) light sensing can be obtained via I2C interface. An external IR LED is also added for Proximity Detection.
Features
- RGB sensor module
- Color light sensing with IR-Blocking filter
- Proximity detection
- Maskable light and proximity interrupt
- Low power (2.5 uA sleep current)
- I2C interface
- 3.3 V power supply
- Current Consumption: 2.5 uA - 235 uA
- Chipset: AMS TCS37725FN
- Module size: 10 x 10 mm
Specifications
Overview
Mounting
Figure 1 shows the mounting mechanism of the RAK12021 module on a WisBlock Base board. The RAK12021 module can be mounted on the slots: A, C, D, E, & F.
Figure 2621: RAK12021 mounting mechanismHardware
The hardware specification is categorized into five (5) parts. It shows the chipset of the module and discusses the pinouts and their corresponding functions and diagrams. It also covers the electrical and mechanical parameters that include the tabular data of the functionalities and standard values of the RAK12021 WisBlock RGB Sensor Module.
Chipset
| Vendor | Part number |
|---|---|
| AMS | TCS37725FN |
Pin Definition
The RAK12021 WisBlock RGB Sensor Module comprises a standard WisBlock connector. The WisBlock connector allows the RAK12021 module to be mounted to a WisBlock Base board. The pin order of the connector and the pinout definition is shown in Figure 2.
Figure 2622: RAK12021 pinoutIf a 24-pin WisBlock Sensor connector is used, the IO used for the output pulse depends on what slot the module is plugged in. The following table shows the default IO used for different slots:
| SLOT A | SLOT C | SLOT D | SLOT E | SLOT F |
|---|---|---|---|---|
| WB_IO1 | WB_IO3 | WB_IO5 | WB_IO4 | WB_IO6 |
| INT (Interrupt Pin) |
|---|
| WB_IO2 |
- Only the I2C related pin, SENSOR_INT, 3V3_S, and GND are connected to this module.
- 3V3_S voltage output from the WisBlock Base that powers the RAK12021 module can be controlled by the WisBlock Core via WB_IO2 (WisBlock IO2 pin). This makes the module ideal for low-power IoT projects since the WisBlock Core can totally disconnect the power of the RAK12021 module.
Electrical Characteristics
Absolute Maximum Ratings
| Parameter | Min. | Max. | Unit |
|---|---|---|---|
| 3V3_S | -0.5 | 3.8 | V |
| Output terminal current (except LDR) | -1 | 20 | uA |
| ESD tolerance, human body model | - | ±2000 | V |
Power Supply Ratings
| Symbol | Description | Condition | Min. | Nom. | Max. | Unit |
|---|---|---|---|---|---|---|
| 3V3_S | Supply voltage | Supply voltage | 2.7 | 3.3 | 3.6 | V |
| IDD1 | Operation mode current | Active - LDR pulses off | - | 235 | - | uA |
| IDD2 | Operation mode current | Wait state | - | 65 | - | uA |
| IDD3 | Operation mode current | Sleep state - no I2C activity | - | 2.5 | 10 | uA |
Mechanical Characteristics
Board Dimensions
Figure 3 shows the dimensions and the mechanic drawing of the RAK12021 module.
Figure 2623: RAK12021 mechanical drawingWisConnector PCB Layout
Figure 2624: WisConnector PCB footprint and recommendationsSchematic Diagram
Figure 5 shows the schematic of the RAK12021 module.
D1 is the external IR LED for proximity detection.
Figure 2625: RAK12021 schematics
