Schematics
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
2.4G FEM CH2
2G_CH2_5G_CH3_DIPLEXER
XR77 is new part wihtout Draytek part number
BPF (2400-2500MHz)
Close to XJ9
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 (XU32) :
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 ohm50 ohm
50 ohm 50 ohm
50 ohm
50 ohm
Close to XEU1
50 ohm
Co-Layout Co-Layout
Walsin SAW Filter (XU73) :
Insertion Loss: 2.2 dB typ. 2.9 dB max. @ 2400 ~ 2484 MHz (-30 ~ +85C)
Pin : 28 dBm @ 2400 ~ 2484 MHz
To XJ10
SAW (For LTE)
XC121 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
XR85 is designed for RTC7647
Co-LayoutCo-Layout
Close to XEU3
Walsin SAW Filter (XU21) :
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 GND
+5V
GND
GND GND
GND
GNDGND
GND
GND
GND
GND GND
GND
GNDGND
GND
FECTL_2_4[17]
FECTL_2_5[17]
FECTL_2_3[17]
2G_TX2 [17]
2G_RX2 [17]
TSSI2_2[17]
5G_ANT3_DI[21]
Title
Size Document Number Rev
Date: Sheet of
RF_2.4G_FEM_CH2
6B
V2766AX
<OrgName>
Custom
19 34Thursday, July 21, 2022
Title
Size Document Number Rev
Date: Sheet of
RF_2.4G_FEM_CH2
6B
V2766AX
<OrgName>
Custom
19 34Thursday, July 21, 2022
Title
Size Document Number Rev
Date: Sheet of
RF_2.4G_FEM_CH2
6B
V2766AX
<OrgName>
Custom
19 34Thursday, July 21, 2022
XU8
NULL/SAW_SF14112442A01T
In
1
GND
2
GND
3
Out
4
Gnd
5
XR68
(AX)0R/0201/5%
1 2
XR140
(AX_LTE)0R/0201/5%
12
XR71
(AX)4.7pF/0201
1 2
XJ2
(AX)IPEX_ANT2_XJ9
1
2
3
XL9
NULL/10nH/0.25A/0201/3%
12
XL27
NULL/0.5pF/50V/0201
12
SKY85331-11
XEU3
(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
XC56
NULL/10pF/25V/0201/2%
XL8
NULL/5.1nH
12
XL28
(AX)0.5pF/50V/0201
12
XL13
NULL/0R/0201/5%
12
XR44
(AX)0R/0402/5%
1 2
XC42
NULL/10pF/25V/0201/2%
XL10
(AX)0.5pF/50V/0201
12
XC41
(AX)1pF/50V/0.05pF/0402
XC54
(AX)0.1uF/16V/0402
XR55
(AX)0R/0402/5%
1 2
XR37
(AX)0R/0201/5%
1 2
XC45
(AX)10pF/25V/0201/2%
XC55
(AX)0.1uF/16V/0402
XL11
NULL/0.5pF/50V/0201
12
XR50
(AX)0R/0201/5%
1 2
XR36
(AX)0R/0201/5%
1 2
XR52
(AX)0R/0201/5%
1 2
XC59
(AX)4.7uF/16V/0805/10%
BF2012-L2R4NAR
XU10
NULL/(AX)BPF_2G
3
OUT
2
GND2
4
GND4
1
IN
DP1608-A2455BKH0
XU15
(AX)DIPLEXER
3
LO_FREQ
2
GND2
1
HI_FREQ
4
GND4
6
GND6
5
COMMON
XL14
(AX)0R/0201/5%
XR38
NULL/1.5nH
12
XL29
(AX_LTE)5.1nH
12
XR40
NULL/0R/0201/5%
1 2
XC63
(AX)1pF/50V/0.05pF/0402
XR39
(AX)0R/0402/5%
1 2
XC86
NULL/2.2pF/50V/0201
12
XR35
NULL/0R/0201/5%
12
XC62
NULL/10pF/25V/0201/2%
XR34
(AX)0R/0201/5%
1 2
XL12
NULL/0R/0201/5%
12
XU21
(AX_LTE)SAW_SF14112442A01T
In
1
GND
2
GND
3
Out
4
Gnd
5
XC44
NULL/10pF/25V/0201/2%
XC67
NULL/10pF/25V/0201/2%
XC68
NULL/10pF/25V/0201/2%
XR138
NULL/0R/0201/5%
1 2
XC48
(AX)1pF/50V/0.05pF/0402
XC61
(AX)10pF/25V/0201/2%
XC43
(AX)10pF/25V/0201/2%
XL30
NULL/10nH/0.25A/0201/3%
12
XR51
NULL/0R/0201/5%
12
XC50
(AX)0.1uF/16V/0402
XC79
(AX)0.4pF/50V/0201
12
XC60
(AX)0.1uF/16V/0402
XC49
(AX)0.1uF/16V/0402
XR42
0R/0201/5%
1 2
XR54
(AX)6.8nH/0.6A/0805/5%
XR139
(AX_LTE)1.5nH
12
2G_PE2
2G_LNA2
2G_CR2
FECTL_2_4
FECTL_2_5
FECTL_2_3
PA_2G2
2G_CR2
2G_LNA2
2G_TX2
PA_2G2
PA_2G2
PA_2G2
PA_2G2
PA_2G2
BPF_2A2
BPF_2B2
2G_PE2
TSSI2_2
5G_ANT3_DI
2G_5G_A2_IPX
2G_RX2
2G_ANT2
2G_ANT2
BPF_2A2 BPF_2B2