[原創(chuàng)] ADI ADPD2140測量入射紅外光角度光學(xué)傳感器解決方案

ADI公司的ADPD2140是用于測量入射紅外光角度的光學(xué)傳感器,輻射敏感面積為 0.31 mm2,具有低結(jié)電容和低暗電流,可實現(xiàn)與ADPD1080光度學(xué)前端的最佳集成,亦可與同步紅外光源(例如發(fā)光二極管 (LED))結(jié)合使用,探測用戶手部運動以進行手勢識別.工作溫度−40℃至 +85℃,主要用在便攜設(shè)備上的用戶手勢界面控制,物體位置跟蹤,工業(yè)/自動化監(jiān)控,角度感應(yīng),接近感應(yīng)和物體距離測量(三角測量).本文介紹了ADPD2140主要特性,功能框圖以及評估板EVAL-ADPD2140Z主要特性,電路圖和PCB布局圖.

The ADPD2140 is an optical sensor that measures the angle of incident infrared light. Light angles calculated from the ADPD2140 response are linear to ±5°within an angular field of view of ±35°.

The ADPD2140 has a radiant sensitive area of 0.31 mm2. The low junction capacitance and low dark current of the ADPD2140 allows optimal integration with the ADPD1080 photometric front end. The ADPD2140 can be used with a synchronous infrared light source such as a light emitting diode (LED) to detect user hand movements for gesture recognition. The ADPD2140 requires four photodiode channels. Therefore, use the ADPD1080BCPZ with the ADPD2140.

Packaged in a small,clear mold, 2 mm×3 mm, 8-lead LFCSP, the ADPD2140 is specified over the −40℃ to +85℃ operating temperature range.

ADPD2140主要特性:

2-axis light angle measurement
Linear response to the angle of incident light
Integrated visible light blocking optical filter
No optics required and no need for precise alignment
Low junction capacitance: 12.7 pF per channel at VR = 0.2 V
Low reverse dark current: 1.74 pA at VR = 0.2 V (all four channels connected in parallel)
8-lead, 2 mm×3 mm,0.65 mm height,LFCSP

ADPD2140應(yīng)用:

Gesture for user interface control in portable devices
Object location tracking
Industrial and automation monitoring
Angle sensing
Proximity sensing
Object distance measurement (triangulation)

圖1.ADPD2140功能框圖

圖2.ADPD2140和ADPD1080連接框圖

評估板EVAL-ADPD2140Z

The EVAL-ADPD2140Z evaluation kit allows users to interface with the ADPD2140 infrared (IR) light angle sensor, collect data from the ADPD2140, and evaluate gesture recognition and triangulation capabilities. The evaluation kit requires the EVAL-ADPDM3Z evaluation board and the Applications Wavetool, a graphical user interface (GUI) that provides users with low level and high level config- urability, real-time data analysis, and user datagram protocol (UDP) transfer capability, which allows the EVAL-ADPDM3Z evaluation board to interface to a PC. The Applications Wavetool can be downloaded from the EVAL-ADPD2140Z evaluation board product page. The USB port of the PC powers the EVAL-ADPDM3Z evaluation board and provides power to the EVAL-ADPD2140Z evaluation board. On-board voltage regulators provide voltage supplies for the ADPD2140. The EVAL-ADPD2140Z evaluation board schematic indicates signal names for easy identification (see Figure 12). Full specifications for the ADPD2140 are available in the ADPD2140 data sheet, which should be consulted in conjunction with this user guide when working with the EVAL-ADPD2140Z evaluation board.

評估板EVAL-ADPD2140Z主要特性:

ADPD2140 full configuration
Register level
Parameter level
Graph views
Time series view
Gesture recognition view
Triangulation view
UDP transfer capability

圖3.評估板EVAL-ADPD2140Z外形圖

圖4.評估板EVAL-ADPD2140Z電路圖

圖5.評估板EVAL-ADPD2140Z PCB布局圖
詳情請見:

和
ADPD2140.pdf
EVAL-ADPD2140Z-UG-1358.pdf