TSL2540 Ambient Light Sensor
Light-to-Digital Converter with I²C interface
Features
- Integrated on-chip photopic filter
- High Sensitivity down to mLux levels
- 0.18µm process technology with 1.8V I²C
- 1M:1 dynamic range
- Automatic AUTO Zero/Dark Count control
Benefits
- Provides near photopic responsiveness
- Design flexibility for dark glass and placement
- Reduces power consumption
- Enables dark room to sunlight operation
- Eliminates system electrical background noise
Product parameters
| Interface | I²C - 1.8 |
|---|---|
| Supply Voltage [V] | 1.7 - 2.0 |
| Programmable | Gain, Integration time, Interrupt |
| Max. Lux [lux] | 20000 |
| Temperature Range [°C] | -30 to 85 |
| Package | QFN (10-Pin) |
| Remark |
General description
The TSL2540 is a very-high sensitivity light-to-digital converter that approximates the human eye response to light intensity under varying lighting conditions and transforms this light intensity to a digital signal output capable through a 1.8V I²C interface. The ALS sensor features 2 output channels, a visible channel and an IR channel. The visible channel has a photodiode with a photopic Interferometric UV and IR blocking filter and the IR channel has a photodiode with an IR pass filter. Each channel has a dedicated integrating data converter which converts photodiode current into a 16-bit digital output. This digital output can be interfaced with a microprocessor where illuminance in lux is derived to accurately measure ambient light to control a displays backlight.
This product suits for the following applications:
- Home assistants
- Smartwatch wearables
- Display backlight control
- Tablets
- Smartphones
- Medical diagnostics
Tools
| Title | Category | Headline | Buy |
|---|---|---|---|
| Evaluation Kit for TSL2540 | Application Board | Evaluation Kit for TSL2540 |
Resources
| Type | Description | Language | ||
|---|---|---|---|---|
| Application Data | EVM documentation v1_0 | English |
Technical documents
| Type | Description | Language | ||
|---|---|---|---|---|
| Datasheet | TSL2540 Datasheet Version 2-00 | English | ||
| Application Note | TSL258x: Accurate ADC Readings after Enable (DN42) | English | ||
| Application Note | Optical Window Design (DN13B) | English | ||
| Application Note | Custom Lux Equation (DN28) | English | ||
| Application Note | Ambient Light Sensing (DN26) | English | ||
| Application Note | Auto-gain Algorithm (DN39) | English | ||
| Application Note | Using the Lux Equation (DN29A) | English | ||
| Application Note | Sensitivity to Temperature (DN24) | English | ||
| Application Note | Sensitivity to Wavelength (DN23) | English | ||
| Application Note | Radiometric and Photometric Measurements (DN21) | English | ||
| Application Note | Improving Color Sensor Lux Accuracy | English | ||
| Application Note | Colorimetry Tutorial (DN 20) | English | ||
| Application Note | Basic Pre-Production Light & Color Sensor Solution Validation Process | English |
Environmental documents
| Type | Description | Language | ||
|---|---|---|---|---|
| Material Declaration Form | MDF_503020050_TSL25403M | English | ||
| Material Declaration Form | MDF_503020050_TSL25403 | English | ||
| RoHS Certificate | RoHS Certificate TSL2540 | English |
Other information
| Type | Description | Language | ||
|---|---|---|---|---|
| Block Diagram | TSL2540 Block Diagram | English | ||
| Factsheet | Light-to-Digital Device Family | English |
Related boards
Evaluation Kit for TSL2540
Evaluation Kit for TSL2540
