AN4630

Reference schematics

1

Reference schematics

Different application boards have been developed to show the BlueNRG device

functionalities.

The schematics of the different application boards are reported in the following pictures and

refer to the various possible combinations:

•

QFN32 package, SMD discrete balun, DC-DC converter ON (Figure 1: "QFN32

package, SMD discrete balun, DC-DC converter ON");

•

QFN32 package, SMD discrete balun, DC-DC converter OFF (Figure 2: "QFN32

package, SMD discrete balun, DC-DC converter OFF");

•

QFN32 package, integrated balun , DC-DC converter ON (Figure 3: "QFN32 package,

integrated balun, DC-DC converter ON");

•

CSP34 package, SMD discrete balun, DC-DC converter ON (Figure 4: "CSP34

package, SMD discrete balun, DC-DC converter ON");

•

CSP34 package, SMD discrete balun, DC-DC converter OFF (Figure 5: "CSP34

package, SMD discrete balun, DC-DC converter OFF");

•

CSP34 package , integrated balun , DC-DC converter ON (Figure 6: "CSP34 package,

integrated balun, DC-DC converter ON");

All the layout guidelines described in the next sections are to be applied to all these

application boards.

Figure 1: QFN32 package, SMD discrete balun, DC-DC converter ON

R1

C17

C20

XTAL1

C9

C21

L6

C7

C10

C18

C13

C14

C8

C3

L5

C6

C12

C2

U1

BlueNRG

GNDPAD

L2

C11

L1

C15

C5

U2

Application MCU

L3

C19

C1

XTAL2

C4

C16

L4

1.7V to 3.6V Power Supply

SPI_MOSI

1

SPI_CLK

2

SPI_I RQ

3

TEST1

4

VB AT3

5

TEST2

6

TEST3

7

TEST4

8

VB AT1

24

SXTAL0

23

SXTAL1

22

RF0

21

RF1

20

VB AT2

19

FXTAL0

18

FXTAL1

17

SPI_MOSI

SPI_CLK

SPI_I RQ

SPI_CS

SPI_MISO

GAMSEC2014129-911

DocID027262 Rev 1

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