I am designing an RF frontend for GPS using MAX2769 chip. However, due to lack of theoretical and practical background in signal processing, I am unsure how to interpret the documentation when it comes to the usage of an external oscillator.
The docs say in the
Crystal Oscillator section:
The MAX2769 includes an on-chip crystal oscillator. A parallel mode crystal is required when the crystal oscillator is being used.
- If an internal ostcillator is included, why would I need an external one?
- Can I not use the internal crystal oscillator (to avoid needing an external one) but still achieve the desired functionality or receiving I and Q data?
- Do I need an external oscillator to keep the internal one in check because of its lower quality (PLL)?
XTAL(pin name) stand for external?