M2012A

Status : Technology Demonstrator

PIR Signal Processor

GENERAL DESCRIPTION

The M2012A integrated circuit is specifically designed for interfacing Passive Infra-red Sensors with micro controllers or processors. The serial communications with the micro controller uses only 1 pin. Multiple M2012A devices can easily be operated at the same time.

One or 2 PIR sensor can be connected to the two PIRIN analog inputs of the device. The differential signal is converted to a digital value using a high resolution sigma-delta converter in combination with advanced DSP techniques. The 15 bit digital value is made available to an external micro controller via a single wire serial interface (DOCITM).

The M2012A allows longer distances between the PIR and the micro controller. The signal processing on the micro controller is reduced due to the integrated low pass filter on the M2012A.

ALTERNATIVE SOLUTION

PerkinElmer is introducing a new product called PYD 1998 which is a Dual Element Pyroelectric Detector housed in a three pin TO-5 package with digital output. The digital sensor is software compatible to the M2012A.

APPLICATIONS