1

Schematic diagrams

C32

C_220n_0402

15

VDDRXDIG

GND

4

C16

NP

R1

R_100k_0402

C50

C_1p5_0402

OUT

+3V3

C37

2p4F

L10

L_5n6H_0402

L8

L_15nH_0402

C11

C_220n_0402

C34

C_3p3F_0402

SW1

1

2

GND

NC

5

U4

SKY66420

L2

L_10U_0603

SW2

NC

C30

C_220n_0402

C47

C_100p_0402

C23

1.5pF

3

C48

C_1p2_0402

C37

2p4F

10

C8

C_100p_0402

2

C18

NM

C24

C_100p_0402

nS

C50

C_1p5_0402

C55

33pF

VDD

RX

R44

2.2K

C61

NP

C5

C_220n_0402

SDN

3

VDDSMPS

U5

STSAFE-A100

18

L24

4n7H

L26

7n5H

C31

2p2F

R1

R_100k_0402

C9

C_100n_0402

L27

2n7H

C36

C_220n_0402

C17

100pF

R3

R_100k_0402

C56

1nF

C44

C_2p7F_0402

C9

C_100n_0402

SDA

L7

L_4n7H_0402

VDD

1. 4 V t o 1. 8 V max

C

C61

NP

7

6

ANT

4

SW2

9

L3

L_39nH_0402

TX_ALT

L13

L_18nH_0402

2

C46

C_100p_0402

C12

C_1u_0402

L9

L_6n8H_0402

1

C6

C_100p_0402

C38

NP

C51

C_100p_0402

R3

R_100k_0402

14

SDA

R45

2.2K

C58

120pF

C41

C_100p_0402

C55

33pF

LNA ON: SW1 soldered a 100 pF cap between 1 - 2

SW2 soldered a 100 pF cap between 1 - 3

LNA OFF: SW1 soldered a 100 pF cap between 1 - 3

SW2 soldered a 100 pF cap between 1 - 2

C60

NP

R2

R_100k_040

C40

12pF

GPIO0

C10

C_220n_0402

C43

C_1p5F_0402

E1

AM11DG-ST01

L12

L_18nH_0402

VDDRXDIG

C1

C_4.7U_0402

nS

VDDANASYNTH

1

SMPS1

TX

U4

SKY66420

8

C57

4u7F

R2

R_100k_040

C3

C_100p_0402

TX

NC

C52

100nF

L28

6n8H

L14

4.7nH

U1

M95640

GND

C35

C_5p6F_0402

SDI

R45

2.2K

C25

C_470p_0402

C59

10nF

C54

10pF

Y1

CRYSTAL_NX1612SA

SDO

VCC

C1

C_4.7U_0402

C16

NP

C24

C_100p_0402

C32

C_220n_0402

C42

NP

C36

C_220n_0402

13

IN

RXN

VSS

+3V3

L3

L_39nH_0402

C25

C_470p_0402

C59

10nF

C62

C_100p_0402

L14

4.7nH

C4

C_100p_0402

nHOLD

1

XOUT

12

C57

4u7F

R20

R_10ohm_0402

4

VSMPS2

L24

4n7H

L11

L_27nH_0402

C6

C_100p_0402

RESET

C7

C_220nF_0402

C23

1.5pF

U1

M95640

C53

10uF/0805

16

SCLK

C33

NP

C42

NP

SDO

C13

C_100p_0402

C41

C_100p_0402

L26

7n5H

L9

L_6n8H_0402

C31

2p2F

L2

L_10U_0603

SDI

2

C35

C_5p6F_0402

L10

L_5n6H_0402

C10

C_220n_0402

C62

C_100p_0402

VRSYNTH

IN

VDDANASYNTH

1

8

R20

R_10ohm_0402

VCC

C11

C_220n_0402

C22

C_220n_0402

L25

4n7H

VRSYNTH

VDDSMPS

+3V3

C49

C_1p5_0402

L7

L_4n7H_0402

C44

C_2p7F_0402

C56

1nF

VDD

E1

AM11DG-ST01

7

C52

100nF

C48

C_1p2_0402

C34

C_3p3F_0402

C12

C_1u_0402

C7

C_220nF_0402

L29

120ohm

L30

0n8H

C51

C_100p_0402

C30

C_220n_0402

C33

NP

C5

C_220n_0402

R44

2.2K

2

C58

120pF

C22

C_220n_0402

U2

S2LP

C54

10pF

L27

2n7H

+3V3

RXP

VDD

4

VSMPS2

D

L13

L_18nH_0402

VDDVCOTX

C17

100pF

C39

C_12pF_0402

nW

J1

SMA ANTENNA

3

SW1

C18

NM

C8

C_100p_0402

SMPS2

RX

3

L8

L_15nH_0402

CSD

C40

12pF

TX

1

C13

C_100p_0402

C2

C_220n_0402

SCL

VDDRXDIG

L29

120ohm

Q

2

SDO

SCLK

C2

C_220n_0402

R43

2.2K

C60

NP

C46

C_100p_0402

6

SCLK

4

SDI

17

L12

L_18nH_0402

C43

C_1p5F_0402

L30

0n8H

U5

STSAFE-A100

OUT

L25

4n7H

5

C47

C_100p_0402

VDD

SDN

U2

S2LP

C39

C_12pF_0402

C53

10uF/0805

C38

NP

SCL

C3

C_100p_0402

C4

C_100p_0402

6

VDDSMPS

L28

6n8H

3

XIN

TX_IN

5

11

C49

C_1p5_0402

RX

Y1

CRYSTAL_NX1612SA

J1

SMA ANTENNA

L11

L_27nH_0402

+3V3

R43

2.2K

3

2