The schematic design should start from the most important nRF9160 interfaces which are the supplies and radio frequency interfaces. The Subscriber Identity Module (SIM) and control interfaces should also be prioritized, as they may require special application components, for example, for Electrostatic Discharge (ESD) protection.
The following figure shows recommendations that can be used as the basis of the application’s schematic design.
The following table provides information on recommended components:
Reference | Description | Quality | Example part number |
---|---|---|---|
C1 | CAP, 15 pF, 25 V, C0G, 0201 | X5R, 10 V or better | GJM0335C1E150JB01 |
C2 | CAP, 100 nF, 10 V, X5R, 0201 | GRM033R61A104KE15 | |
C3 | CAP, 47 uF, 10 V, X5R, 0805 | GRM21BR61A476ME15 | |
C5 | CAP, 100 nF, 10 V, X5R, 0201 | GRM033R61A104KE15 | |
C6 | CAP, 4.7uF, 10V, X5R, 0402 | GRM155R61A475MEAA | |
C7 | |||
C8 | CAP, 15 pF, 25V, C0G, 0201 | GJM0335C1E150JB01 | |
C9 | CAP, 100 nF, 10 V, X5R, 0201 | GRM033R61A104KE15 | |
C10 | CAP, 47 uF, 10 V, X5R, 0805 | GRM21BR61A476ME15 | |
C12 | CAP, 100 nF, 10 V, X5R, 0201 | GRM033R61A104KE15 | |
C13 | |||
C141 | Optional. Not recommended to be assembled by default. | GJM0335C1E100JB01 | |
C151 | |||
C162 | GRM033R61A104KE15 | ||
R/L/C | Antenna matching | High-Q components, for example, Murata LQW15AN series inductors and GJM1555C1 series capacitors | |
L/C | |||
R1 | 10 kΩ resistor | NA | RC0201FR-0710KL |
R2 | Resistor in the range of 1 kΩ | RC0201FR-071KL | |
R3 | |||
R4 |
1CAP, ≤10 pF, 5%, 25 V, C0G, 0201
2CAP, 100 nF, 10 V, X5R, 0201
For recommended matching component values and topology, see the datasheets of the LTE and Global Positioning System (GPS) antennas. For more information on the antenna design and interface, see nWP033 - nRF9160 Antenna and RF Interface Guidelines.