资料介绍
AD6548+SKY77542+Diplexer SAW5
4
3
2
1
E1 ANTENNA nc C1 C2 nc VRF_SEMSE L1 0R C3 PAEN
D
R1 1K C4 22pF
Outside the shielding
VBAT A L3 C9 NC + VRF_23 0 C11 K VAPC C12 10K 22pF C13 220pF R4 24K NC 2 1
L2 0
D
nc
Suggest to connect to BANDSW_DCS VccRF(2.8V) to get better HB Low PCL isolation
R2 VLOGIC NC
C5 6pF C10 6pF
C6 22pF
C7 C8 0.1uF 22uF R3
VCCRF
VRF R5 J1 TST_PORT 4 1 0R 13 16 18 6 5
VRF_23 supply power to tranceiver and PA,VRF_SENSE is the feedbak pin to BB.
12
11
VLOGIC
TX_EN
RSVD
RSVD
RSVD
VBATT
BS
VRAMP
10
9
7
3
2
GND GND
6 4 3 5 1 2 26MHz L8 820nH C18 47pF L4 NC R6 27 R7 56
C14
0 L5 27nH
C15
22pF
23 27 28 29 30 31
ANT DCS_IN GND GND GND GND DCS_RX GND GND GND GND GND GND GND GND GND GND GND GSM_RX GND
L6 nc
L7 nc
SKY77552/SKY77542
EGSM_IN
C
This area forbid to put th