RF2722_1 Datasheet, PDF (16/26 Pages) RF Micro Devices – GSM/GPRS/EDGE RECEIVER

RF2722
Proposed
Application Schematic
26 MHz Clock Input
RX Enable from RF6001/3 or RX Controller
GPO1
GPO2
V_CC
150 Ω EGSM or
GSM850 RF SAW
Filter
EGSM/GSM850
RF INPUT
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
10 nF
32
31
30
29
28
27
26
25
1
LNA1
2
24
Serial
Data
Interface
23
3
LNA2
4
5
LNA3
6
22
21
Quadrature
Mixer
Polyphase
Filter
DC
Correct
20
19
To Serial Port
Controller
V_CC
To RF6001/3 or
VLIF-to-Baseband
Converter
TX EN
7
18
LNA4
Quadrature
Generator
8
17
9
10
11
12
13
14
15
16
V_CC
4.7 μF
HB TXVCO Output from RF6001/3
LB TXVCO Output from RF6001/3
V_CC
To RF6001/3 or PLL
(See Note)
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.
VBATT
2.2 μF
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Rev A4 DS050919