Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
2.4G FEM CH0
2G_CH0_5G_CH1_DIPLEXER
XR90 is new part wihtout Draytek part number
BPF (2400-2500MHz)
Close to SMA3
SKY85331-11 :
Output power: +22 dBm @ 1.8% EVM, HT40, MCS9, 5 V
Output power: +26 dBm @ 3% EVM, HT40, MCS7, 5 V
ACX 2G BPF (XU30) :
Insertion Loss: 0.9 dB max. (25C)
Insertion Loss: 1.1 dB max. (-40C~85C)
ACX 2G/5G Diplexer (XU7) :
2G Insertion Loss: 0.6 dB max.
5G Insertion Loss: 0.78 dB max.
2G Isolation: 38 dB min. @ 2400 ~ 2500 MHz
5G Isolation: 38 dB min. @ 4900 ~ 5950 MHz
50 ohm
50 ohm
50 ohm
50 ohm
50 ohm
50 ohm
50 ohm
50 ohm
Close to XEU2
Close to XEU2
Co-LayoutCo-Layout
Walsin SAW Filter (XU71) :
Insertion Loss: 2.2 dB typ. 2.9 dB max. @ 2400 ~ 2484 MHz (-30 ~ +85C)
Pin : 28 dBm @ 2400 ~ 2484 MHz
SAW (For LTE)
XC134 is 6.3V voltage
in REF design
Layout Notice :
- Each Vcc pin needs to be individually decoupled.
- VCC0, VCC1, VCC2, and VCC3 should NOT be shorted
together at the device pins.
Layout Notice :
- Decoupling CAP should be placed before RES
Layout Notice :
- Control Pin C0, C1 should be shielded by GND
with more Vias.
50 ohm
XR98 is designed for RTC7647
Co-LayoutCo-Layout
Walsin SAW Filter (XU20) :
Insertion Loss: 2.9 dB 20x. @ 2400 ~ 2484 MHz
Pin : 28 dBm @ 2400 ~ 2484 MHz, 20MHz OFDM Signal
GND
GND
GND
GND
GND
GND
GND
GND
GNDGNDGNDGND
GND
GND
GND
GND
GND GND
+5V
GND
GNDGND
GND
GND
GND GND
GND
GND
GND
GND
GNDGND
GND
GND GND
FECTL_0_4[17]
FECTL_0_5[17]
FECTL_0_3[17]
2G_TX0 [17]
2G_RX0 [17]
TSSI2_0[17]
5G_ANT1_DI[20]
Title
Size Document Number Rev
Date: Sheet of
RF_2.4G_FEM_CH0
6B
V2766AX
<OrgName>
Custom
18 34Thursday, July 21, 2022
Title
Size Document Number Rev
Date: Sheet of
RF_2.4G_FEM_CH0
6B
V2766AX
<OrgName>
Custom
18 34Thursday, July 21, 2022
Title
Size Document Number Rev
Date: Sheet of
RF_2.4G_FEM_CH0
6B
V2766AX
<OrgName>
Custom
18 34Thursday, July 21, 2022
XR3
(AX)0R/0201/5%
1 2
XC15
(AX)4.7uF/16V/0805/10%
XL26
NULL/10nH/0.25A/0201/3%
12
XL23
NULL/0.5pF/50V/0201
12
XC35
NULL/10pF/25V/0201/2%
XC19
(AX)0.1uF/16V/0402
XL6
NULL/0R/0201/5%
12
XR31
NULL/0R/0201/5%
12
XL2
(AX)0.5pF/50V/0201
12
XC20
(AX)0.1uF/16V/0402
XU3
NULL/SAW_SF14112442A01T
In
1
GND
2
GND
3
Out
4
Gnd
5
XC22
(AX)0.1uF/16V/0402
SKY85331-11
XEU2
(AX)SKY85331-11
VCC3
20
VCC2
22
VCC1
23
DET
6
NU5
5
PA_EN
4
GND1
1
NU8
8
GND3
3
VDD
10
GND7
7
LNA_OUT
12
LNA_IN
13
TX_IN
2
RX_OUT
15
C0
16
ANT
17
GND9
9
C1
19
GND11
11
GND14
14
GND18
18
GND21
21
VCC0
24
PAD
25
XR18
(AX)0R/0402/5%
1 2
XC23
NULL/10pF/25V/0201/2%
XR135
NULL/0R/0201/5%
1 2
XC17
(AX)10pF/25V/0201/2%
XC39
(AX)10pF/25V/0201/2%
XR19
NULL/1.5nH
12
XC2
(AX)0.4pF/50V/0201
12
XR22
(AX)0R/0402/5%
1 2
XL3
NULL/5.1nH
12
DP1608-A2455BKH0
XU1
(AX)DIPLEXER
3
LO_FREQ
2
GND2
1
HI_FREQ
4
GND4
6
GND6
5
COMMON
XC38
(AX)0.1uF/16V/0402
XR134
NULL/0R/0201/5%
1 2
XJ1
(AX)IPEX_2G_FEM0
1
2
3
XR136
(AX_LTE)1.5nH
12
XR1
(AX)4.7pF/0201
1 2
XR28
(AX)0R/0402/5%
1 2
XR30
(AX)0R/0201/5%
1 2
XR12
(AX)0R/0201/5%
1 2
XC37
(AX)1pF/50V/0.05pF/0402
XL5
NULL/10nH/0.25A/0201/3%
12
XR137
(AX_LTE)0R/0201/5%
12
XC30
NULL/10pF/25V/0201/2%
XR29
(AX)0R/0201/5%
1 2
XL7
NULL/0R/0201/5%
12
XR20
(AX)0R/0201/5%
1 2
XC16
NULL/10pF/25V/0201/2%
XC36
NULL/10pF/25V/0201/2%
BF2012-L2R4NAR
XU7
NULL/(AX)BPF_2G
3
OUT
2
GND2
4
GND4
1
IN
XL4
NULL/0.5pF/50V/0201
12
XL25
(AX_LTE)5.1nH
12
XR13
NULL/0R/0201/5%
12
XR33
0R/0201/5%
1 2
XR9
(AX)0R/0201/5%
1 2
XC40
NULL/10pF/25V/0201/2%
XC14
(AX)1pF/50V/0.05pF/0402
XR21
(AX)6.8nH/0.6A/0805/5%
XU20
(AX_LTE)SAW_SF14112442A01T
In
1
GND
2
GND
3
Out
4
Gnd
5
XL1
(AX)0R/0201/5%
XC1
NULL/2.2pF/50V/0201
12
XL24
(AX)0.5pF/50V/0201
12
XC29
(AX)10pF/25V/0201/2%
XC21
(AX)0.1uF/16V/0402
XC24
(AX)1pF/50V/0.05pF/0402
2G_PE0
2G_LNA0
2G_CR0
FECTL_0_4
FECTL_0_5
FECTL_0_3
PA_2G0
2G_ANT0
2G_CR0
2G_LNA0
2G_TX0
PA_2G0
PA_2G0
PA_2G0
PA_2G0
PA_2G0
BPF_2A0
BPF_2B0
2G_PE0
TSSI2_0
5G_ANT1_DI
2G_5G_A0_IPX
2G_RX0
2G_ANT0
BPF_2A0 BPF_2B0