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Sensor device slashes PCB space, smartphone BOM

Posted: 22 Jul 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Ams? smartphone? sensor? LED? 3D gesture detection?

Ams AG has rolled out a series of advanced optical sensing modules that features multiple functions such as universal remote control, barcode emulation, RGB colour sensing, proximity and 3D gesture detection. The TMx4903 devices are available in a low-profile 5mm x 2mm x 1mm package.

The high level of integration in the TMx4903 modules reduce board space requirements and lowers bill of material (BOM) cost while delivering novel capabilities required by today's smartphones. By integrating multiple optical sensing functions and an IR LED in a module, the TMx4903 devices help to simplify smartphone board layouts giving greater flexibility to system designers. The low-profile package also helps designers to meet consumer demand for sleeker, slimmer and more aesthetically plea-sing smartphone designs.


The module variants in the series, the TMD4903 and TMG4903, perform accurate colour and proximity sensing, and integrate an IRBeam IR pattern generator. The IR pattern generator emits remote control beam patterns for any standards-compliant consumer product. The URC capability is also compatible with the Android Consumer. IR programming interface for remote-control applications on smartphones. Mobeam 1D barcode emulation for use at retail point-of-sale (POS) terminals is also supported.

The TMG4903 device also claims to provide the industry's most advanced touchless IR gesture-sensing capability. Ams' 3D gesture technology enables the recognition of complex hand gestures, supplementing simple north-south and east-west 2D gestures supported by Ams' 1st generation TMG3992 gesture sensor.

The TMx4903 3D gesture and proximity capability draws on the modules' automatic adjustment of the IR LED's timing and power output, minimising noise and power consumption while optimising sensitivity and dynamic range. The TMx4903 incorporates innovative circuit techniques which rejects ambient light noise. Automatic calibration removes electrical artifacts caused by noise and optical cross-talk. This integrated intelligent LED drive capability eliminates the requirement for the application processor to control LED driving functions which simplifies the phone's software implementation and reduces processing capability required for instantaneous gesture recognition.

The TMD4903 and TMG4903 are available in production volumes. Unit pricing for the TMD4903 is $2 and the TMG4903 is $2.50 in order quantities of 1,000.

Evaluation boards for the TMD4903 and TMG4903 are available for qualified opportunities.

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