Integration Manual
Table Of Contents
- Document information
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Supply interfaces
- 1.5.1 Module supply input (VCC)
- 1.5.1.1 VCC supply requirements
- 1.5.1.2 VCC current consumption in LTE connected mode
- 1.5.1.3 VCC consumption in deep-sleep mode (low power mode and PSM enabled)
- 1.5.1.4 VCC current consumption in low power idle mode (low power mode enabled)
- 1.5.1.5 VCC current consumption in active mode (low power mode and PSM disabled)
- 1.5.2 Generic digital interfaces supply output (V_INT)
- 1.5.1 Module supply input (VCC)
- 1.6 System function interfaces
- 1.7 Antenna interfaces
- 1.8 SIM interface
- 1.9 Data communication interfaces
- 1.10 Audio
- 1.11 General purpose input / output (GPIO)
- 1.12 Reserved pin (RSVD)
- 2 Design-in
- 2.1 Overview
- 2.2 Supply interfaces
- 2.2.1 Module supply (VCC)
- 2.2.1.1 General guidelines for VCC supply circuit selection and design
- 2.2.1.2 Guidelines for VCC supply circuit design using a switching regulator
- 2.2.1.3 Guidelines for VCC supply circuit design using low drop-out linear regulator
- 2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable battery
- 2.2.1.5 Guidelines for VCC supply circuit design using a primary battery
- 2.2.1.6 Guidelines for external battery charging circuit
- 2.2.1.7 Guidelines for external charging and power path management circuit
- 2.2.1.8 Guidelines for removing VCC supply
- 2.2.1.9 Additional guidelines for VCC supply circuit design
- 2.2.1.10 Guidelines for VCC supply layout design
- 2.2.1.11 Guidelines for grounding layout design
- 2.2.2 Generic digital interfaces supply output (V_INT)
- 2.2.1 Module supply (VCC)
- 2.3 System functions interfaces
- 2.4 Antenna interfaces
- 2.5 SIM interface
- 2.6 Data communication interfaces
- 2.6.1 UART interfaces
- 2.6.1.1 Guidelines for UART circuit design
- Providing 1 UART with the full RS-232 functionality (using the complete V.24 link)
- Providing 1 UART with the TXD, RXD, RTS, CTS, DTR and RI lines only
- Providing 1 UART with the TXD, RXD, RTS and CTS lines only
- Providing 2 UARTs with the TXD, RXD, RTS and CTS lines only
- Providing 1 UART with the TXD and RXD lines only
- Providing 2 UARTs with the TXD and RXD lines only
- Additional considerations
- 2.6.1.2 Guidelines for UART layout design
- 2.6.1.1 Guidelines for UART circuit design
- 2.6.2 USB interface
- 2.6.3 SPI interfaces
- 2.6.4 SDIO interface
- 2.6.5 DDC (I2C) interface
- 2.6.1 UART interfaces
- 2.7 Audio
- 2.8 General purpose input / output (GPIO)
- 2.9 Reserved pin (RSVD)
- 2.10 Module placement
- 2.11 Module footprint and paste mask
- 2.12 Schematic for SARA-R5 series module integration
- 2.13 Design-in checklist
- 3 Handling and soldering
- 4 Approvals
- 5 Product testing
- Appendix
- A Migration between SARA modules
- B Glossary
- Related documents
- Revision history
- Contact
SARA-R5 series - System integration manual
UBX-19041356 - R03 Design-in Page 63 of 123
Confidential
The external LNA can be selected to deliver the performance needed by the application in terms of:
Noise figure (sensitivity)
Selectivity and linearity (robustness against jamming)
Robustness against RF power
Depending on the characteristics of the supply source (DC/DC regulator, linear LDO regulator or other)
used to supply the external LNA, make sure some good filtering is in place for the external LNA supply
because of the noise on the external LNA supply line can affect the performance of the LNA itself:
consider adding a proper series ferrite bead (as for example the Murata BLM15HD182SN1, Murata
BLM15HD102SN1, TDK MMZ1005F121E, or TDK MMZ1005A121E) and a proper decoupling capacitor to
ground (as for example the Murata GCM1555C1H270JA16, 22 pF capacitor) at the input of the external
LNA supply line.
It should be noted anyway that the insertion loss of the filter directly affects the system noise figure
and hence the system performance. The selected SAW filter has to provide very low loss in the GNSS
pass-band, beside providing very large attenuation in the out-band jammers cellular frequency bands
(as for example the Murata SAFFB1G56AC0F0A, or the Murata SAFFB1G56AC0F7F).
Table 21 lists examples of passive antennas to be used with SARA-R510M8S modules.
Manufacturer
Part number
Product name
Description
Tallysman
TW3400P
Passive antenna
GPS / SBAS / QZSS / GLONASS
Tallysman
TW3710P
Passive antenna
GPS / SBAS / QZSS / GLONASS / Galileo / BeiDou
Taoglas
CGGBP.35.3.A.02
Ceramic patch antenna
GPS / SBAS / QZSS / GLONASS / Galileo / BeiDou
Taoglas
CGGBP.18.4.A.02
Embedded patch antenna
GPS / SBAS / QZSS / GLONASS / Galileo / BeiDou
Inpaq
PA1590MF6G
Patch antenna
GPS / SBAS / QZSS / GLONASS
Yageo
ANT2525B00BT1516S
Ceramic patch antenna
GPS / SBAS / QZSS / GLONASS
Antenova
SR4G008
Sinica
Ultra-low profile patch antenna
GPS / SBAS / QZSS / GLONASS / Galileo / BeiDou
Table 21: Examples of GNSS passive antennas.