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How to select the crystal oscillator and which is main factors for the same.
What is PPM and usage for selection process
What is PPM and usage for selection process
Crystal or Crystal Oscillator Selection
- Thread starter RANJIHELLO
- Start date
Firstly, you need to define your application and state the oscillator operating frequency.
Next, state the error your application can tolerate.
A crystal oscillator is an active circuit. It requires power and ground connection to operate. The package size is relatively large. 12 x 12 mm approx. is common size.
A crystal is a passive device. It needs to be incorporated into an oscillator circuit for it to work. Some crystals, such as a 32768Hz watch crystal can be relatively small, 6 x 2mm.
ppm stands for parts per million. This is a measure of the stability and accuracy of the crystal oscillator.
1000ppm = 0.1%
100ppm = 0.01%
10ppm = 0.001%
1ppm = 0.0001%
All crystal oscillators are dependent on temperature and they age with time.
If you need ultra-stable performance you can use a temperature-controlled crystal oscillator oven.
Next, state the error your application can tolerate.
A crystal oscillator is an active circuit. It requires power and ground connection to operate. The package size is relatively large. 12 x 12 mm approx. is common size.
A crystal is a passive device. It needs to be incorporated into an oscillator circuit for it to work. Some crystals, such as a 32768Hz watch crystal can be relatively small, 6 x 2mm.
ppm stands for parts per million. This is a measure of the stability and accuracy of the crystal oscillator.
1000ppm = 0.1%
100ppm = 0.01%
10ppm = 0.001%
1ppm = 0.0001%
All crystal oscillators are dependent on temperature and they age with time.
If you need ultra-stable performance you can use a temperature-controlled crystal oscillator oven.
