TSL27711 Ambient Light Sensors
Light-to-digital converter with proximity sensing, I2C Vbus = VDD interface
Features
- Patented dual-diode architecture
- 1M:1 dynamic range
- Programmable LED drive current
- Programmable interrupt function
- Area efficient 2mm x 2mm Dual Flat no-lead (FN) package
Benefits
- Enables operation in IR light environments
- Enables operation in 10 kLux sunlight and accurate sensing behind spectrally distorting materials
- Allows multiple power level selection without external passives
- Reduces microprocessor interrupt overhead
- Reduces board space requirements while simplifying designs
Product parameters
Supply Voltage [V] | 2.6 - 3.6 |
---|---|
I²C Bus | VDD |
Programmable | Gain, Integration time, Interrupt |
Integrated Capabilities | ALS, Prox, LED Drvr. |
Recommended Operating Distances [cm] | < 46 |
Temperature Range [°C] | -40 to 85 |
Package | FN, pin count 6 |

General description
The TSL2771 family of devices provides both ambient light sensing (ALS) and proximity detection (when coupled with an external IR LED). The ALS approximates human eye response to light intensity under a variety of lighting conditions and through a variety of attenuation materials. The proximity detection feature allows a large dynamic range of operation for use in short distance detection behind dark glass such as in a cell phone or for longer distance measurements for applications such as presence detection for monitors or laptops. The programmable proximity detection enables continuous measurements across the entire range. In addition, an internal state machine provides the ability to put the device into a low power mode in between ALS and proximity measurements providing very low average power consumption.

This product suits for the following applications:
- Display backlight control
- Touchscreen control
- Medical diagnostics
- Industrial process control
- Printer paper alignment and detection

Tools
Title | Category | Headline | Buy |
---|---|---|---|
TSL2771EvalKit | Application Board | Evaluation Kit for TSL2771 |
Technical documents
Type | Description | Language | ||
---|---|---|---|---|
Datasheet | Document version 1-00 | English | ||
Application Note | Using Interrupts and the Persistence Filter (DN 41) | English | ||
Application Note | TSL2771 I2C Communications & Proximity Algorithm (DN30A) | 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 | ||
---|---|---|---|---|
RoHS Certificate | RoHS Certificate_TSL2771 | English |
Notifications
Type | Description | Language | ||
---|---|---|---|---|
EoL Notification | Plano Test Site (issued May-20-2021) | English |
Other information
Type | Description | Language | ||
---|---|---|---|---|
Block Diagram | TSL2771 Block Diagram | English |