BAW Oscillator Solutions for Building Automation

BAW Resonator Technology

BAW is a micro-resonator technology that enables the integration of high-precision and ultra-low jitter clocks directly into packages that contain other circuits. In the BAW oscillator, the BAW is integrated with a co-located precision temperature sensor, a ultra-low jitter, low-power fractional output divider (FOD), a single-ended LVCMOS and differential LVPECL, LVDS, and HCSL output driver, and a small power-reset-clock management system consisting of several low noise LDOs.

Figure 1-1 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.

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 1-2 PCB Footprint Comparison of BAW Oscillator and Crystal
• Higher performance with reliability protection for a variety of vibration and shock performance requirements.
  Figure 1-3 BAW Oscillator Vibration Sensitivity
  Figure 1-4 Temperature Stability Comparison of BAW Oscillator and Quartz
• Low jitter to achieve optimal BER performance in system.
  Figure 1-5 LMK6C BAW Oscillator 25 MHz Phase Noise Performance

In Building automation systems, the BAW oscillator 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 the BAW oscillator solution.

Figure 1-6 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.