BAW Resonator Technology

Figure 1 shows the structure of the the BAW resonator technology. The structure includes a thin layer of piezoelectric film sandwiched between metal films and other layers that confine the mechanical energy. The BAW utilizes this piezoelectric transduction to generate a vibration.

Figure 1 Basic Structure of a Bulk Acoustic Wave (BAW) Resonator

BAW Oscillator in Building Automation

Building automation systems maximize safety, robustness and reliability at a scalable level. To obtain better performance in applications such as IP camera, Video surveillance, and HVAC, a complex and reliable network of accurate clock data is required.

In advanced building automation systems such as the ones listed above, the following performance metrics are required:

• Higher density of product design with wide thermal performance and small layout size.
  Figure 2 PCB Footprint Comparison of BAW Oscillator and Crystal
• Higher performance with reliability protection for a variety of vibration and shock performance requirements.
  Figure 3 BAW Oscillator Vibration Sensitivity
  Figure 4 Temperature Stability Comparison of BAW Oscillator and Quartz
• Low jitter to achieve optimal BER performance in system.
  Figure 5 LMK6C BAW Oscillator 25 MHz Phase Noise Performance

In Building automation systems, the CDC6C and LMK6C BAW oscillators can be used as a reference clock for the following devices:

For all of the frequencies listed above, jitter performance, reliability, and stability are key performance factors. All of these metrics can be met with a BAW oscillator solution.

Figure 6 shows the typical block diagrams for IP-Camera and HVAC systems. For IP-Camera applications, the BAW oscillator can be used as a reference clock for the ASIC, MCU, Image Sensor, Audio Codec, HDMI/SDI, and Ethernet PHYs. For HVAC systems, the BAW oscillator can be used as a reference to the WIFI/BLE, MCU, FPGA, and Ethernet PHYs.

Figure 6 Typical Block Diagrams of BAW Oscillator Used in Building Automation