Data Sheet

DATA SHEET | SENTIMATE
4.1.2. Relative Humidity Sensor:
The relative humidity sensor is combined with the temperature sensor in the same package. The sensor’s I 2C output is
read by the AmbiMate’s microcontroller. Note: Actual performance may vary due to customer enclosure design. Enclo-
sure should allow for air circulation to ensure sensor is responding to humidity changes within the intended environ-
ment of use. Please refer to 108-133092 for performance of product. 3.4.3
4.1.3. Ambient Light Photo Sensor:
The photo sensor mimics the responsivity of the human eye. The analog output from the sensor is read by the Ambi-
Mate’s microcontroller’s analog to digital converter. Note: Ambient light impinges directly on the sensor, no light pipe.
If in the final application the photo sensor becomes shadowed, then a light pipe will be required to achieve optimum
performance. The light pipe design is dependent upon the final application and use and is beyond the scope of this
application specification. Please refer to 108-133092 for performance of product.
4.1.4. Passive Infrared Motion Sensor (PIR):
The PIR senses motion. The output from the sensor is read by the AmbiMate’s microcontroller. During design-in and
mounting the AmbiMate consideration should be given for placement of the device on a ceiling, wall or in a corner to
maximize the PIR sensors effectiveness. A Fresnel lens is required, please contact TE customer support for information
on the lens. During a motion event, the Event_Out pin will go high. Related to the PIR sensor is the motion event LED.
When the AmbiMate senses motion the motion event LED will illuminate. For enhanced motion detection, please con-
tact TE customer support
4.1.5. Acoustic Microphone with Pre-Amp
The microphone is omnidirectional with an analog output. The analog output from the microphone is read by the Am-
biMate’s microcontroller’s analog to digital converter and is available to the host application via the 2-pin connector.
The AmbiMate is configured to identify an audio event which can be set by writing to register 0xC1. At audio levels
below 75 dB, quantization of the ADC will limit reported values to the following: 20, 58, 64, 67, 70, 73, 75. Above 75 dB,
the AmbiMate will report in 1 dB increments. The preset sound level can be adjusted by the host. The analog output
can be used to define a specific gain circuit. Please refer to the 108-133092 for detailed test data on the analog output.
The characteristics of the microphone are summarized in the table below: