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.
Not Recommended for New Designs!
ams-OSRAM AG is discontinuing production of this device. Final lifetime buy order must be placed by OCTOBER 15, 2021. Please contact your local sales representative for further information regarding available or planned replacement options.
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 |
Related boards
Evaluation Kit for TSL2771
TSL2771EvalKit
The TSL2771 Evaluation Kit comes with everything needed to evaluate the TSL2771 proximity and ambient light sensor. The evaluation kit comprises of a main controller board with a PIC microcontroller, an industry standard USB 2.0 interface (with an USB cable), a TSL2771 daughter card, "plug-n-play" USB HID class drivers, software documentation, and GUI software allowing users to control the ALS and proximity sensor settings as the PIC takes the TSL2771 I2C digital outputs to calculate ALS illuminance in lux approximating the human eye response.
Please note that ams-OSRAM AG is discontinuing production of TSL2771.
Related products
TMD2620 Proximity Detection Module
TMD2620
The device is an advanced proximity sensor. The slim module incorporates an IR LED and factory calibrated LED driver. The proximity detection feature provides object detection (e.g. mobile device screen to user’s ear) by photodiode detection of reflected IR energy (sourced by the integrated LED). Detect/Release events are interrupt driven, and occur when proximity result crosses upper and/or lower threshold settings. The proximity engine features offset adjustment registers to compensate for unwanted IR energy reflection at the sensor. Proximity results are further improved by automatic ambient light subtraction.
TSL2740 Ambient Light Sensor
TSL2740
The TSL2740 includes both proximity detection and very-high sensitivity light-to-digital converter ambient light sensing (ALS) features. The proximity detection feature provides object detection using photodiode detection with reflected IR energy. The detect/release events are interrupt driven, and occur when proximity result crosses upper and/or lower threshold settings. The proximity engine features offset adjustment registers to compensate for unwanted IR energy reflection at the sensor. Proximity results are further improved by automatic ambient light subtraction. The ALS feature 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 baklight.