AN4630 datasheet(5/33 Pages) STMICROELECTRONICS

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AN4630

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

C17

C20

XTAL1

C21

C10

C18

C13

C14

C12

BlueNRG

GNDPAD

C11

C15

Application MCU

C19

XTAL2

C16

1.7V to 3.6V Power Supply

SPI_MOSI

SPI_CLK

SPI_I RQ

TEST1

VB AT3

TEST2

TEST3

TEST4

VB AT1

SXTAL0

SXTAL1

RF0

RF1

VB AT2

FXTAL0

FXTAL1

SPI_MOSI

SPI_CLK

SPI_I RQ

SPI_CS

SPI_MISO

GAMSEC2014129-911

DocID027262 Rev 1

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