A peak-to-peak voltage of 0.5V should be sufficient for the referecen clock input signal. However, the peak amplitude shall not be too high, especially if the input is a square wave where there will be…
If a square wave is used as input, the higher order harmonics of the square signal will generate stronger spurious signals, lowering the quality of the received signal. For best performance use a TCXO…
In the MAX2769B Configuration 3 register, bits 13 and 12 enable the I and Q Programmable Gain Amplifiers (PGA), respectively. These bits are marked "reserved" in Table 9 of the datasheet. A value of 1…
There are ten registers in the MAX2769B, including the last two that are "Reserved for test mode." It is required to program all ten registers upon power-up, and this includes the TEST1 and TEST2 registers…
The CCH suffix indicates the product is intended for one specific customer. Electrically, in terms of performance/specifications, both MAX2769BETI/V+ and MAX2769BETI/V+CCH are identical.
50MHz is too high for this reference clock. The bits RDIV can be adjusted to keep PLL input frequency in the range of 50KHz ~32MHz, which can be verified via CLKOUT pin.
The highest IF output frequency is limited to the bandwidth of the filter. In bandpass mode it is IF+4MHz, and in lowpass mode it is 18MHz (-9MHz to 9MHz).
The datasheet says that the P1dB referred to the input of the mixer is -85dBm, please use this value even if the User's Guide suggests that the input signal should be stepped from -150dBm to -65dBm.
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The MAX2769B is active in full production as Maxim's only AEC-Q100 automotive qualified GPS receiver. For non-automotive applications, the MAX2769C is a better choice. The MAX2769C shares the same features…