2 CDC6C BAW Oscillator Family

Bulk Acoustic Wave is a micro-resonator technology that enables the integration of high-precision and ultra-low jitter clocks directly into packages that contain other circuits. BAW consists of a piezoelectric material sandwiched between two electrodes, converting electrical energy to mechanical-acoustical energy, producing reliable oscillations that result in a high-frequency, stable clock output. Read more in the Top 5 Things to Know About TI BAW Resonator Technology, technical article.

CDC6C integrates BAW resonator technology with a low-jitter, low-power integer output divider (IOD) along with an LVCMOS output driver. This allows flexibility in frequency output within the range of 250kHz to 200MHz. Figure 2-1 details the CDC6C internal block diagram. This has several integrated low-noise, low dropout (LDO) regulators that reduce power supply noise, providing a clean clock output. An internal precision temperature sensor feeds the frequency control logic block to reduce oscillation frequency variation. These frequency corrections enable CDC6C to maintain output frequency within ±50ppm accounting for all internal error sources and 10 years of aging.

Figure 2-1 CDC6C Internal Block Diagram

CDC6C BAW oscillators are available in industry-standard small packages (3.2mm × 2.5mm, 2.5mm × 2.0mm, 2.0mm x 1.6mm, and 1.6mm x 1.2mm). Unlike passive crystal resonators, CDC6C oscillators do not require external tuning capacitors, which allows for both PCB size and BOM cost reductions as shown in Figure 2-2.

Figure 2-2 CDC6C Oscillator Available Packages and Layout Example

CDC6C is pin and package compatible with many single-ended 4-pin quartz oscillator land patterns on the market, and often is a drop-in replacement without any surrounding component changes. Read more here: Universal Land Patterns for BAW Oscillators

CDC6C has a number of advantages including frequency flexibility, temperature stability, power supply noise immunity among others. Tables below summarize these advantages and showcase how BAW oscillators have solved design limitations found in some quartz oscillators. Additional information in the following application notes:

• Standalone BAW Oscillators Advantages Over Quartz Oscillators, application note
• Vibration and Mechanical Shock Performance of TI’s BAW Oscillators, application note
• High Reliable BAW Oscillator MTBF and FIT Rate Calculations, application note.

Table 2-1 outlines the BAW advantages over traditional quartz oscillators in the areas of frequency flexibility, temperature stability, and reduced sensitivity to vibration and mechanical shock.

Table 2-2 outlines BAW advantages in reduced power supply noise, lower failure rate, frequency flexibility, reliable supply chain, and common landing pattern.