The following figure illustrates a typical reference circuit diagram of the ATA5352. A standard lithium battery, for example
CR2032, can provide the IO voltage between 2.0V and 3.5V. The core voltage of 1.25V is
generated by a DC/DC converter for optimized overall power consumption.
The host microcontroller controls the ATA5352 via the SPI
interface. If required, the host can derive a high precision clock from the 48 MHz
crystal of the ATA5352.
The RFIO pin of the device has an impedance of 30Ω. The application of this pin when matching to a 50Ω antenna requires the following components:
High-Q wire wound coil inductor with a
Self-Resonant Frequency (SRF) >12 GHz (recommended size 0402).
30Ω-to-50Ω matching network including a High-Q
capacitor (recommended size 0201). It is recommended that the microstrip and
co-planar lines be used to achieve the required matching.
The following reference circuit illustrates an example implementation including the component
values to achieve the required matching.Figure 2-1. ATA5352 Reference Circuit Diagram
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