MAX-8 / MAX-M8 - Hardware Integration Manual
UBX-15030059 - R05
Design
Page 16 of 31
Production Information
The LNA_EN signal can be used to turn on and off an external active Antenna. This reduces power
consumption in Power Save Mode (Backup mode).
Figure 12: External active antenna control (MAX-8C/Q and M8C/Q)
Figure 13: MAX-M8W module design with external supply, active antenna (for exact pin orientation, see the
MAX-M8 Data Sheet
[2])
2.4.6
Power, short and open detection Antenna Supervisor (MAX-M8W)
The open circuit detection (
ANT_DET
) circuit uses the current flow to detect an open circuit in the
antenna. Calculate the threshold current using Equation 1.
