TSL2569 Ambient Light Sensor
Light-to-digital converter with I2C interface
Features
- Patented dual-diode architecture
- 1M:1 dynamic range
- Programmable interrupt function
- I²C digital interface
- Available in 1.25mm x 1.75mm chip-scale or 2.6mm x 3.8mm TMB packages
Benefits
- Enables operation in IR light environments
- Enables dark room to high lux sunlight operation
- Reduces microprocessor interrupt overhead
- Digital interface is less susceptible to noise
- Reduces board space requirements while simplifying designs
Product parameters
| Supply Voltage [V] | 2.7 - 3.6 |
|---|---|
| Interface | I²C - VDD |
| Programmable | Gain, Integration time, Interrupt |
| Max. Lux [lux] | 10000 |
| Temperature Range [°C] | -30 to 70 |
| Package | (6-Pin) CS, T |
| Remark | Not recommended for new designs. Please see TSL2572x device family. |
General description
The TSL2569 is a low-voltage, light-to-digital converter that transforms light intensity to a digital signal output capable of direct I2C interface. Each device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit capable of providing a near photopic response over an effective 20-bit dynamic range (16-bit resolution). Two integrating ADCs convert the photodiode currents to a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The TSL2569 device supports a traditional level style interrupt that remains asserted until the firmware clears it.
This product suits for the following applications:
- Display backlight control
- Keyboard illumination control
- Solid state and general lighting control
- Printer paper detection
Technical documents
| Type | Description | Language | ||
|---|---|---|---|---|
| Datasheet | Document version 1-00 | 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 |
Notifications
| Type | Description | Language | ||
|---|---|---|---|---|
| EoL Notification | TSL1x_TSL2xx_TSL25xx_TSL4531 (issued 2017-Feb) | English |
Other information
| Type | Description | Language | ||
|---|---|---|---|---|
| Block Diagram | TSL2569 Block Diagram | English |
Related products
TSL2584TSV Ambient Light Sensor
TSL2584TSV
The TSL2584TSV is a very high sensitivity light-to-digital converter that transforms light intensity into a digital signal output with a fast mode I²C interface. The device combines one broadband photodiode (visible plus infrared), one infrared-responding photodiode, and a photopic infrared-blocking filter on a single CMOS integrated circuit. Two integrating analog-to-digital converters (ADCs) convert the photodiode currents into a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The TSL2584TSV supports a traditional level style interrupt that remains asserted until the firmware clears it.
TSL2540 Ambient Light Sensor
TSL2540
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.