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Advantages of TCXO | Disadvantages of TCXO

This page covers advantages and disadvantages TCXO. It mentions TCXO advantages and TCXO disadvantages compare to other crystal oscillator types.

What is TCXO:
The term TCXO refers to Temperature Compensated Crystal Oscillator. It is widely used in communication devices due to its ability to correct the frequency as per surrounding temperature variation. The figure-1 below depicts working operation of TCXO cystral oscillator type. Refer TCXO basics and types>> for more information.


TCXO working operation

Advantages of TCXO

Following are the advantages of TCXO:
➨It delivers higher temperature performance, which is about 10 to 40 times better compare to other crystal oscillators.
➨It is available in wide variety of package sizes as per user requirements.
➨It provides clipped sine wave and normal sine wave outputs.
➨The power input varies as per device. Typically 3V supply is widely used. It draws current of about 2 mA only.
➨Wide variety of TCXOs are available based on analog or digital or analog-digital compensation networks. The most common TCXO types include ADTCXO, DTCXO, DCXO and MCXO.

Disadvantages of TCXO

Following are the disadvantages of TCXO:
➨The cost of TCXO increases to achieve very high performance on the order of +/- 1.5 ppm over temperature range of 0 degree C to 70 degree C.
➨It has higher power dissipation compare to other normal oscillator types due to use of additional circuitry.
➨It requires some time to stabiize after it is powered ON. This may be about 100 ms or higher.

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