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