9
RAK
2247
9
RAK2247 User Manual V1.1
2.11
Antenna RF Interface
The modules have one RF interfaces over a standard UFL connectors (Hirose U. FL-R-
SMT) with a characteristic impedance of 50Ω. The RF port (J1) supports both Tx and
Rx, providing the antenna interface.
2.12
Electrical Characteristics
Stressing the device above one or more of the ratings listed in the Absolute Maximum
Rating section may cause permanent damage. These are stress ratings only.
Operating the module at these or at any conditions other than those specified in the
Operating Conditions sections of the specification should be avoided. Exposure to
Absolute Maximum Rating conditions for extended periods may affect device reliability.
The operating condition range define those limit within which the functionality of the
device is guaranteed. Where application information is given, it is advisory only and
does not form part of the specification.
2.12.1
Absolute Maximum Rating
Limiting values given below are in accordance with the Absolute Maximum
Rating System (IEC 134).
Symbol
Description
Condition
Min.
Max.
3.3Vaux
Module supply
voltage
Input DC voltage at
3.3Vaux pins
–0.3V
3.6V
USB
USB D+/D- pins
Input DC voltage at USB
interface pins
3.6V
SPDT_SEL
Port select
Input DC voltage at
SPDT_SEL input pins
–0.3V
3.6V
RESET
RAK
2247
reset
input
Input DC voltage at
RESET input pin
–0.3V
3.6V
SPI
SPI interface
Input DC voltage at SPI
interface pin
–0.3V
3.6V
GPS_PPS
GPS 1 pps input
Input DC voltage at
GPS_PPS input pin
–0.3V
3.6V
Rho_ANT
Antenna
ruggedness
Output RF load mismatch
ruggedness at ANT1
10:1
VSWR
Tstg
Storage
Temperature
–40°C
85°C
Table 4
| Absolute Maximum Ratings
