TMD2672EVM ams

TMD2672 Digital Proximity Detector The TMD2672 family of devices provides a complete proximity General Description detection system and digital interface logic in a single 8-pin surface mount module. The devices are register-set and pin-compatible with the TMD2671 series and includes new and improved proximity detection features. The proximity detection includes improved signal-to-noise and accuracy. 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. Interrupts have been enhanced with the addition of a sleep-on-interrupt feature that also allows for a single cycle operation. The device internal state machine provides the ability to put the device in a low-power mode in between proximity measurements, providing very low average power consumption. The proximity detection system includes an LED driver and an IR LED, which are factory trimmed to eliminate the need for end-equipment calibration due to component variations. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet Page 1 v1-00 2015-Mar-23 Document FeedbackT M D2 672 Gen e ra l De s c rip t ion Key Benefits & Features The benefits and features of the TMD2672 digital proximity detector, are listed below: Figure 1: Added Value of Using TMD2672 Benefits Features Digital Proximity Detector, LED Driver, and IR LED in a Single Optical Module Eliminates need for customer Register Set- and Pin-Compatible with the TMD2671 end-product calibration. Series Reduces the proximity noise Control of system crosstalk and offset Proximity Detection Prevents false proximity detection in (1) - Reduced Proximity Count Variation bright light (1) Selectable IR power-level without - Programmable Offset Control Register (1) external resistor -Saturation Indicator Enables wide operating range - Programmable Integration Time and Offset - Current Sink Driver for IR LED - 16,000:1 Dynamic Range Maskable Proximity Interrupt Reduces external processor burden - Programmable Upper and Lower Thresholds with Persistence Filter Power Management - Low Power 2.2A Sleep State with User-Selectable Enables dynamic power dissipation (1) Sleep-After-Interrupt Mode control - 90A Wait State with Programmable Wait Time from 2.7ms to > 8 seconds IC Fast Mode Compatible Interface - Data Rates up to 400kbit/s Industry standard two-wire interface - Input Voltage Levels Compatible with V or 1.8V Bus DD Small foot-print module 3.94mm 2.36mm 1.35mm Package Note(s) and/or Footnote(s): 1. New or improved feature Applications Mobile Handset Touchscreen Control and Automatic Speakerphone Enable Mechanical Switch Replacement Paper Alignment Page 2 ams Datasheet Document Feedback v1-00 2015-Mar-23