Proposed
RF2722
Application Schematic
26 MHz Clock Input
RX Enable from RF6001/3 or RX Controller
GPO1
GPO2
VCC
To Serial Port
Controller
150 Ω EGSM or
GSM850 RF SAW
Filter
32
31
30
29
28
27
26
25
VCC
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
EGSM/GSM850
RF INPUT
LNA1
Serial
Data
Interface
150 Ω EGSM or
GSM850 RF SAW
Filter
To RF6001/3 or
VLIF-to-Baseband
Converter
EGSM/GSM850
RF INPUT
LNA2
LNA3
Quadrature
Mixer
Polyphase
Filter
DC
Correct
100 Ω PCS or
DCS RF SAW Filter
PCS/DCS
RF INPUT
TX EN
100 Ω DCS or
PCS RF SAW Filter
HB TXVCO Output from RF6001/3
LB TXVCO Output from RF6001/3
PCS/DCS
RF INPUT
Quadrature
Generator
LNA4
9
10
11
12
13
14
15
16
VCC
VCC
To RF6001/3 or PLL
(See Note)
10 nF
4.7 μF
To RF31XX PA HB Input
To RF31XX PA LB Input
National LP2985
2.8 V Low-Dropout Regulator
or Equivalent
NOTE
If external PLL is used for RF2722 VCO Control, VTC must be manually
toggled to place the VCO in appropriate frequency range to achieve lock.
2.2 μF
VBATT
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
16 of 26
Rev A4 DS050919
RFMD [ RF MICRO DEVICES ]
