TMD27723 Ambient Light Sensor
Digital ambient light sensor, proximity sensor and IR LED in an optical module 1.8V I2C
Features
- Integrated ALS, proximity sensor, and IR LED
- ALS based on patented dual-diodes
- 1M:1 dynamic range
- Proximity detection calibrated and trimmed to provide consistent reading
- Programmable LED drive current
Benefits
- Module reduces board space and design effort
- Enables operation in IR light environments
- Allows accurate sensing behind spectrally distorting materials (e.g. dark glass)
- Pre-calibration eliminates need for customer to calibrate the end-product
- Allows multiple power level selection without external passives
Product parameters
| Supply Voltage [V] | 2.6 - 3.6 |
|---|---|
| I²C Bus | 1.8 |
| Programmable | Gain, integration time, interrupt |
| Integrated Capabilities | ALS, Prox, LED Drvr. IR LED |
| Recommended Operating Distances [cm] | <15 |
| Temperature Range [°C] | -40 to 85 |
| Package | Surface mount module, pin count 8 |
General description
The TMD2772 family of devices provides digital ambient light sensing (ALS), a complete proximity detection system, and digital interface logic in a single 8-pin surface mount module. The devices are register-set and pin-compatible with the TMD2771 family of devices and include new and improved ALS and proximity detection features. The ALS enhancements include a reduced gain mode that extends the operating range in sunlight. Proximity detection includes improved signal-to-noise performance and more accurate factory calibration. A proximity offset register allows compensation for optical system crosstalk between the IR LED and the sensor. To prevent false proximity data measurement readings, a proximity saturation indicator bit signals that the internal analog circuitry has reached saturation.
This product suits for the following applications:
- Touchscreen control
- Display backlight control
- Medical diagnostics
- Industrial process control
- Optical switch
Tools
| Title | Category | Headline | Buy |
|---|---|---|---|
| TMD2772EvalKit | Application Board | Evaluation Kit for TMD2772 |
Technical documents
| Type | Description | Language | ||
|---|---|---|---|---|
| Datasheet | Document version 1-21 | English | ||
| Application Note | I2C Timing Requirements | English | ||
| Application Note | Proximity Detection and Link Budget (DN38) | English | ||
| Application Note | Proximity Detection and IR Ink (DN 35) | English | ||
| Application Note | Proximity Calibration and Test (DN 37) | 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 |
Environmental documents
| Type | Description | Language | ||
|---|---|---|---|---|
| RoHS Certificate | RoHS Certificate_TMD2772_TMD2772WA | English |
Notifications
| Type | Description | Language | ||
|---|---|---|---|---|
| EoL Notification | TMD27723INT17 (issued 2018-Mar) | 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 | TMD2772 Block Diagram | English |
Related boards
Evaluation Kit for TMD2772
TMD2772EvalKit
The TMD2772 Evaluation Kit comes with everything needed to evaluate the TMD2772 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 TMD2772 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 TMD2772 I2C digital outputs to calculate ALS illuminance in lux approximating the human eye response.
Related products
TMD2725 Ambient Light Sensor
TMD2725
The device features advanced proximity measurement and digital ambient light sensing (ALS). The package has been designed to accommodate a single small aperture approach. The 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. The ALS detection feature provides photopic light intensity data. The ALS photodiode has UV and IR blocking filters and a dedicated data converter producing 16-bit data. This architecture allows applications to ccurately measure ambient light which enables devices to calculate illuminance to control display backlight.
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.