adf7023-j Analog Devices, Inc., adf7023-j Datasheet - Page 76

• Manufacturer Part Number: adf7023-j
• Description: High Performance, Low Power, Ism Band Fsk/gfsk/msk/gmsk Transceiver Ic
• Manufacturer: Analog Devices, Inc.

ADF7023-J
Transmit Antenna Diversity
Transmit antenna diversity is possible using the differential PA
and single-ended PA. The required matching network is shown
in Figure 87.
Support for External PA and LNA Control
The ADF7023-J provides independent control signals for an
external PA or LNA. If the EXT_PA_EN bit is set to 1 in the
MODE_CONTROL register (Address 0x11A), the external PA
control signal is logic high while the ADF7023-J is in the
PHY_TX state and logic low while in any other state. If the
EXT_LNA_EN bit is set to 1 in the MODE_CONTROL register
(Address 0x11A), the external LNA control signal is logic high
while the ADF7023-J is in the PHY_RX state and logic low
while in any other state.
(DIFFERENTIAL
PA) AND RX
ENDED PA)
(SINGLE-
TX
TX
Figure 87. Matching Topology for Transmit Antenna Diversity
HARMONIC
HARMONIC
FILTER
FILTER
Rev. 0 | Page 76 of 100
DIFFERENTIAL PA AND
LNA MATCH
The external PA and LNA control signals can be configured
using the EXT_PA_LNA_CONFIG setting (Address 0x11B)
as described in Table 44.
Table 44. Configuration of the External PA and LNA Control
Signals
EXT_PA_LNA_CONFIG
0
1
SINGLE-ENDED
PA MATCH
3
4
5
6
CREGRF2
RFIO_1P
RFIO_1N
RFO2
ADF7023-J
Configuration
External PA signal on ADCIN_ATB3
and external LNA signal on ATB4
(1.8 V logic outputs)
External PA signal on
XOSC32KP_GP5_ATB1 and
external LNA signal on
XOSC32KN_ATB2 (V
DD
logic outputs)