A Temperature Compensator Crystal Oscillator or a TCXO is a crystal oscillator that is designed to withstand high-temperature conditions. In a regular crystal oscillator the oscillation frequency fluctuates with the rise in temperature. The consequence of this is an unstable oscillation frequency. TCXO supports a stable oscillation frequency at high temperatures. For this, they take the help of a temperature compensation network which balances out the oscillation frequency at higher temperatures.
Performance figure of TCXO
Some of the most important performance figures of TCXO are as follows:
- Power Dissipation – The dissipation of power in a TCXO will be much greater as compared to an ordinary oscillator keeping in view of the additional circuitry needed. In addition to that the cost becomes greater. It should also be kept in mind that the cost is greater. It is also worth remembering that it will take a short period after start-up for the oscillator to stabilize. This might be of the order 100 ms, or conceivably more, subordinate upon the plan.
- TCXO PPM performance – As said earlier, the performance of TCXO temperature is much better as compared to a normal crystal oscillator. Ordinarily, figures of somewhere in the range of 10 and 40 times improvement can regularly be seen. Figures that are better than +1.5 (or -1.5) ppm over a temperature range of 0 to 70 degrees Celsius are much harder to achieve as they at that point fall into a high exactness classification where costs increment essentially.
- TCXO package – TCXOs can be supplied in several packages depending upon the requirements of the end-user as well as the way they have been designed. The most well-known type of development is to build the circuit on a little printed circuit board that can be housed in a plat metal bundle. This is then reasonable for mounting onto the fundamental circuit leading body of the general hardware. As the crystal is sealed itself, this implies fixing of the general TCXO bundle isn't basic, or even required for most applications.
- Output format and level - With numerous TCXOs being utilized for driving advanced circuits, a large portion of the little oscillator bundles produce what is named a clipped sine wave. This is suitable for driving a logic circuit, but in many instances it is recommended to put it through a logic buffer to make sure that it is sufficiently square. The output is generally an open collector circuit. On the off chance that a sine wave output is needed, at that point this must be picked at the start and it will confine the decision accessible.
- Power Requirements – The actual requirement of power depends on the particular device. Many works from provisions of 3 V, and may draw as meager as 2 mA, even though this will rely on the general kind, the producer and the specific gadget picked.
This was all we have regarding the TCXO oscillator. Hope you liked going through it. Brands that manufacture them are ABRACON, TXC Corporation, and AVX. Check them out using the links as provided.
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