TSL26721
Digital proximity detector, LED drvr., Vdd I2C interface
Features
- Patented dual-diode architecture
- Programmable proximity offset adjustment
- Proximity saturation indicator bit
- Programmable LED drive current
Benefits
- Enables operation in IR light environments
- Eliminates IR LED system cross talk
- Prevents false proximity detection in bright light
- Allows multiple power level selection without external passives
Product parameters
| Supply Voltage [V] | 2.4 - 3.6 |
|---|---|
| I²C Bus | VDD |
| Programmable | Gain, Integration time, Interrupt |
| Integrated Capabilities and Components | |
| Recommended Operating Distances [cm] | < 15, < 46 |
| Temperature Range [°C] | -30 to 70 |
| Package | FN, pin count 6 |
General description
The TSL2672 family of devices provides proximity detection when coupled with an external IR LED. The devices incorporate a constant-current LED sink driver to pulse the external IR LED and achieve very low average power consumption using the low power wait state with programmable wait time between proximity measurements. In addition, the devices are register-set and pin-compatible with the TSL2671 series and include a number of new and improved features, such as improved signal-to-noise and measurement accuracy. A proximity offset register allows compensation for optical system crosstalk between the IR LED and the sensor. To prevent false measurements, a proximity saturation bit indicates that the internal analog circuitry saturated. Interrupts have been enhanced with the addition of a sleep-after-interrupt feature that also allows for single-cycle operation.
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:
- Touchscreen control
- Notebook and monitor security
- Industrial process control
- Printer paper alignment and detection
- Optical switch
Tools
| Title | Category | Headline | Buy |
|---|---|---|---|
| TSL2672EvalKit | Application Board | Evaluation Kit for TSL2672 |
Technical documents
| Type | Description | Language | ||
|---|---|---|---|---|
| Datasheet | TSL2672 datasheet v1-01 | English | ||
| Application Note | Signal, Noise, Offset and Proximity Sensors (DN33) | English | ||
| Application Note | Signal, Noise, Offset - TSL2771 (DN33.1 Appendix) | English | ||
| Application Note | Signal, Noise, Crosstalk - TCS3771 (DN33.2 Appendix) | English | ||
| Application Note | Colorimetry Tutorial (DN 20) | English | ||
| Application Note | Optimizing Proximity Parameters | English | ||
| Application Note | Basic Pre-Production Light & Color Sensor Solution Validation Process | English |
Notifications
| Type | Description | Language | ||
|---|---|---|---|---|
| EoL Notification | Plano Test Site (issued May-20-2021) | English | ||
| Product Change Notification | CN15-2016 (TSL26721, TMD27723) | English | ||
| Product Change Notification | PCN42-2020 (issued 2020-Aug) | English |
Other information
| Type | Description | Language | ||
|---|---|---|---|---|
| Block Diagram | TSL2672 Block Diagram | English | ||
| Factsheet | Proximity Detection Sensors | English |
Related boards
Evaluation Kit for TSL2672
TSL2672EvalKit
The TSL2672 Evaluation Kit comes with everything needed to evaluate the TSL2672 proximity 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 TSL2672 daughter card, "plug-n-play" USB HID class drivers, software documentation, and GUI software allowing users to control the proximity sensor settings as the PIC takes the TSL2672 I2C digital outputs to calculate proximity.
Please note that ams-OSRAM AG is discontinuing production of TSL2672.
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.