Ublox NEO-6

LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794 Production Information Design-in
Page 50 of 85
2.6.6 External active antenna supervisor using ANTOFF (NEO-6)
Figure 51: External active antenna supervisor using ANTOFF (NEO-6)
References
Value
Tolerance
Description
Remarks / Manufacturer
R1
10 
 5%
Resistor, min 0.25 W
R2
560 
 5%
Resistor
R3
100 k
 5%
Resistor
R4
100 k
 5%
Resistor
U1
LT6000
Rail to Rail Op Amp
Linear Technology
T1
Si1016X-T1-E3
Transistor
Vishay
L1
LQG15HS27NJ02
Inductor
muRata
C1
X5R 100N 10V
10%
Decoupling Capacitor
muRata
Table 22: Active antenna supervisor, bill of material
RFVcc
R
RR
R
I _
1
32
2









Equation 2: Calculation of threshold current for open circuit detection
The state diagram of active antenna supervisor is in Figure 45. When using an external LNA in PSM on /
off mode, pin 17 can be programmed as ANTOFF (see section 1.7.7). Use ANTOFF_IN and ANTOFF_OUT
signals to command antenna power supply when going into Power Save Mode (Backup mode).
Use caution when implementing ANTOFF configuration since forward compatibility is not
guaranteed