DLPA2000 datasheet(45/58 Pages) TI1

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DLPA2000

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DLPS043A – JUNE 2014 – REVISED AUGUST 2015

Typical Mobile Sensing Application (continued)

8.3.2 Detailed Design Procedure

8.3.2.1 Dlpc150 System Interfaces

The 0.2-inch WVGA chipset supports a 16-bit or 24-bit parallel RGB interface for image data transfers from

another device. There are two primary output interfaces: illumination driver control interface and sync outputs.

8.3.2.1.1

Control Interface

The 0.2-inch WVGA chipset supports I2C commands through the control interface. The control interface allows

another master processor to send commands to the DLPC150 controller to query system status or perform

realtime operations, such as LED driver current settings.

8.3.3 Application Curve

In a reflective spectroscopy application, a broadband light source illuminates a sample and the reflected light

spectrum is dispersed onto the DLP2010NIR. A microprocessor in conjunction with the DLPC150 controls

individual DLP2010NIR micromirrors to reflect specific wavelengths of light to a single point detector. The

microprocessor uses an analog-to-digital converter to sample the signal received by the detector into a digital

value. By sequentially selecting different wavelengths of light and capturing the values at the detector, the

microprocessor can then plot a spectral response to the light. This systems allows the measurement of the

collected light and derive the wavelengths absorbed by the sample. This process leads to the absorption

spectrum shown in Figure 44.

Figure 44. Sample Dlpc150 Based Spectrometer Output

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DLPA2000 Datasheet(PDF) 45 Page - Texas Instruments