Operation Guide

OG_LMD-401_v10e Circuit Design, Inc. 6
OPERATION GUIDE
PIN DESCRIPTION
Pin name I/O Description Equivalent circuit
RF I/O
RF input terminal
Antenna impedance nominal 50 Ω
GND I
GROUND terminal
The GND pins and the feet of the shield
case shoud be connected to the wide
GND pattern.
VCC I
Power supply terminal
DC 3.0 to 5.5 V
TXSEL I
TX select terminal
GND = TXSEL active
To enable the transmitter circuits,
connect TXSEL to GND and RXSEL to
OPEN or 2.8 V.
RXSEL I
RX select terminal
GND= RXSEL active
To enable the receiver circuits, connect
RXSEL to GND and TXSEL to OPEN
or 2.8 V.
AFOUT O
Analogue output terminal
There is DC offset of approx. 1 V.
Refer to the specification table for
amplitude level.
CLK I
PLL data setting input terminal
Interface voltage H = 2.8 V, L = 0 V
DATA I
PLL data setting input terminal
Interface voltage H = 2.8 V, L = 0 V