driven by E910.91 PIR signal processor (Digital pir sensor) Features General Description ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ ÿ The E910.91 integrated circuit is designed for interfacing Passive Infra Red (PIR) sensors with micro-controllers or processors. A single wire Data Out, Clock In (DOCI™) interface is provided for interfacing. Multiple devices can easily be operated at the same time. Digital PIR sensor signal processor Supply voltage range 3 V to 5.5 V Differential PIR sensor input Digital Signal Processor (DSP) 14 bit resolution Single wire serial interface (DOCI™) Low current consumption High dynamic range High supply rejection Operating temperature range -40°C to +85°C Bare die for chip on board assembly One or two PIR sensors connect directly to the PIR inputs. The PIR signal is converted to a 6 bit digital value with an analog to digital converter. A 14 bit resolution is achieved with a decimation filter combined with a second order Butterworth low pass filter. The output signal from the filter is supplied to an external microcontroller through the DOCI™ interface. Applications ÿ Smart digital PIR sensor modules for multiple sensor applications ÿ Motion detection ÿ Intruder detection ÿ Occupancy detection VDD U1 DPIR DOCI_1 VSS DOCI_2 6 7 8 9 10 11 12 13 VSS DOCI_3 VSS DOCI_4 VDD VSS 14 5 VDD U5 DPIR Vin Vout C2 C1 2 RE1 L1 VSS U6 RA0 RA1 RA2 RA3 RTCC RB0 RB1 RB2 RB3 RB4 RB5 RB6 RB7 MCLR VDD OSC2/CLKOUT VSS OSC1 J1 2 1 Voltage J2 2 1 Alarm R1 17 18 1 2 3 R2 Q1 R3 4 VDD VSS 15 X1 16 PIC16F84 C4 VSS C5 VSS DOCI_5 Digital PIR Sensor Module PIR+ E910.91 PIR- ELMOS Semiconductor AG D1 1 GND User settings VDD U4 DPIR C3 U7 S3 VDD U3 DPIR 3 S2 VDD U2 DPIR VDD S1 VSS VDD VDD VSS VSS DOCI_5 DOCI_5 Info Sheet QM-No.: 25IS0028E.00 2009-09-03 ELMOS Semiconductor AG – Headquarters Heinrich-Hertz-Str. 1 | 44227 Dortmund | Germany Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 149 email@example.com | www.elmos.de Note ELMOS Semiconductor AG (below ELMOS) reserves the right to make changes to the product contained in this publication without notice. ELMOS assumes no responsibility for the use of any circuits described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been checked, no responsibility, however, is assumed for inaccuracies. ELMOS does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications. Copyright © 2009 ELMOS Reproduction, in part or whole, without the prior written consent of ELMOS, is prohibited.