TMD27721WA Digital Ambient Light Sensor
Digital ambient light sensor, proximity sensor and IR LED in an optical module Vdd I2C
Features
- Ambient light sensing, proximity detection, and IR LED in a single module
- Wide variety of programmable features with very high sensitivity
- Proximity detection
- Maskable ALS and proximity interrupt
- Power management
- I²C fast mode compatible interface
- 3.94mm x 2.36mm x 1.35mm package
- Available with standard 25° (TMD2772) and wide 50° (TMD2772WA)
Benefits
- Minimizes board space requirements
- Approximates human eye response over a wide variety of lighting conditions
- Reduces external processor burden
- Enables dynamic power dissipation control
- Industry standard two-wire interface
- Small foot print module
- Optimizes ambient light sensing angle
Product parameters
| Supply Voltage [V] | 2.2 – 3.6 |
|---|---|
| I²C Bus | VDD |
| 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 TMD2772WA 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 and are available with 25° and 50° fields of view. 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.
Tools
| Title | Category | Headline | Buy |
|---|---|---|---|
| TMD2772WAEvalKit | Application Board | Evaluation Kit for TMD2772WA |
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 | Basic Pre-Production Light & Color Sensor Solution Validation Process | English |
Other information
| Type | Description | Language | ||
|---|---|---|---|---|
| Block Diagram | TMD2772WA Block Diagram | English |
Related boards
Evaluation Kit for TMD2772WA
TMD2772WAEvalKit
The TMD2772WA Evaluation Kit is comprised of all materials to evaluate the digital ambient light and proximity sensor, TMD2772WA. The evaluation kit includes a TMD2772WA daughter card, “plug-n-play” USB HID class drivers, main controller board with PIC microcontroller, industry standard USB 2.0 interface (includes USB cable), software documentation, and GUI software to enable users to control sensor settings for ALS and proximity as the PIC takes TMD2772WA I2C digital outputs for lux calculation of ambient sensing illuminance and proximity.
Related products
TMD2725 Ambient Light Sensor
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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
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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.