RAK12010 WisBlock Ambient Light Sensor Module Datasheet
Overview
Description
RAK12010 is a WisBlock Sensor that extends the WisBlock system to have ambient light sensing capability. It uses the VEML7700 chip from Vishay Semiconductors with an I2C interface making it easy to build an ambient light data acquisition system.
Features
- Ambient Light Sensor (ALS) module
- Digital 16-bit resolution sensor
- Ambient Light Range: 0 lx to about 120,000 lx
- Ambient Light Resolution: 0.0036 lx
- Excellent temperature compensation
- 3.3 V Power Supply
- Current Consumption: < 2 - 45 uA
- Chipset: Vishay Semiconductors VEML7700
- Module size: 10 X 10 mm
Specifications
Overview
Mounting
Figure 1 shows the mounting mechanism of the RAK12010 module on a WisBlock Base board. The RAK12010 module can be mounted on the slots: A, B, C, D, E, & F.
Figure 2371: RAK12010 mounting mechanism on a WisBlock Base moduleHardware
The hardware specification is categorized into five parts. It shows the chipset of the module and discusses the pinouts and its 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 RAK12010 WisBlock Ambient Light Sensor Module.
Chipset
| Vendor | Part number |
|---|---|
| Vishay Semiconductors | VEML7700 |
Pin Definition
The RAK12010 WisBlock Ambient Light Sensor Module comprises a standard WisBlock connector. The WisBlock connector allows the RAK12010 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 2372: RAK12010 Pinout Diagram-
Only I2C related pins, 3V3_S, and GND are connected to the WisConnector.
-
3V3_S voltage output from the WisBlock Base that powers the RAK12010 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 RAK12010 module.
Electrical Characteristics
This sections shows the maximum and minimum ratings of the RAK12010 module and its recommended operating conditions. Refer to the table presented below.
Absolute Maximum Ratings
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| VBAT | -0.3 | +4.20 | V |
| 3V3_S | 0 | 3.6 | V |
| Total power dissipation | 0 | 50 | mW |
Power Supply Ratings
| Symbol | Description | Condition | Min. | Nom. | Max. | Unit |
|---|---|---|---|---|---|---|
| VBAT | Supply Voltage | Input voltage must within this range | 3.3 | 4.0 | 4.2 | V |
| 3V3_S | VEML7700 Operating Voltage | Input voltage must within this range | 2.5 | 3.3 | 3.6 | V |
| Isd | Shut down current | VDD is 3.3 V | - | 0.5 | - | uA |
| IDD1 | Operation mode current | VDD is 3.3 V, PSM = 11, refresh time 4100 ms | - | 2 | - | uA |
| IDD2 | Operation mode current | VDD is 3.3 V, PSM = 00, refresh time 600 ms | - | 8 | - | uA |
| IDD3 | Operation mode current | VDD is 3.3 V, PSM_EN = 0, refresh time 100 ms | - | 45 | - | uA |
Mechanical Characteristics
Board Dimensions
The mechanical dimensions of the RAK12010 module is shown in Figure 3 below.
Figure 2373: RAK12010 Mechanical DimensionsWisConnector PCB Layout
Figure 2374: WisConnector PCB footprint and recommendationsSchematic Diagram
Figure 5 shows the schematic of the RAK12010 module.
Figure 2375: RAK12010 WisBlock Module SchematicsPCB Silkscreen
Figure 6 shows the PCB Silkscreen of the RAK12010 module.
Figure 2376: RAK12010 PCB Silkscreen
