MAX-7 / NEO-7 / LEA-7 - Hardware Integration Manual
GPS.G7-HW-11006-1 Design
Page 20 of 55
3.2.3 Minimal design (LEA-7N)
This is a minimal setup for a GPS/GNSS receiver with a LEA-7N module:
Figure 7: LEA-7N passive antenna design
For active antenna design, see section 3.4.2
Function PIN No I/O Description Remarks
Power VCC 6 I Supply Voltage Provide clean and stable supply.
GND 7, 13, 14,
15, 17
I Ground Assure a good GND connection to all GND pins of the module
VCC_OUT 8 O Leave open if not used.
V_BCKP 11 I Backup Supply
Voltage
It is recommended to connect a backup supply voltage to V_BCKP
in order to enable Warm and Hot Start features on the positioning
modules. Otherwise, connect to VCC.
VDD_USB 24 I USB Power
Supply
To use the USB interface connect this pin to 3.0 – 3.6V.
If no USB serial port used connect to GND.
Antenna RF_IN 16 I GPS/GALILEO
signal input
from antenna
Use a controlled impedance transmission line of 50
Ωto connect to
RF_IN.
Do not supply DC through this pin. Use V_ANT pin to supply
power.
VCC_RF 18 O Output Voltage
RF section
Can be used to power an external active antenna (VCC_RF
connected to V_ANT with 10
). The max power consumption of
the antenna must not exceed the datasheet specification of the
module.
Leave open if not used.
V_ANT 19 I Antenna Bias
voltage
Connect to GND (or leave open) if passive antenna is used. If an
active antenna is used, add a 10 Ω resistor in front of V_ANT input
to the Antenna Bias Voltage or VCC_RF
AADET_N 20 I Active Antenna
Detect
Input pin for optional antenna supervisor circuitry. Leave open if not
used.
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