DATA SHEET • SKY66108-11: 2.4 GHz SMART ENERGY/ZIGBEE FRONT-END MODULE

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com

8

April 16, 2015 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 202969B

Y1903

TRXP

VB_IN

N/C

TRXN

N/C

ANT

N/C

CTX

CSD

2

3

4

5

14

15

13

12

11

6

78

9

10

20

19

18

17

16

×

C3

100 nF

C6

10 pF

C5

10 pF

C12

1 pF

L2

2.7 nH

VB

C2

100 nF

21

××

CTX

CSD

C11

1 pF

CRX

CPS

C8

10 pF

C4

100 nF

VCC

VCC

L1

3.6 nH

1

3

5

7

9

11

13

15

17

19

J3

VB

CPS

CRX

CTX

CSD

2

4

6

8

10

12

14

16

18

20

C1

2.2 μF

VCC

VCC

VCC

J1

SMA

R3

100K

R1

100K

R2

100K

R4

100K

×

C7

10 pF

J4

SMA

HHM1520

U2

SKY66108-11

U1

PCB Recommendations:

Metal Layer 1 = RF traces + control lines. Core thickness between top RF layer and ground plane is critical.

Metal Layer 2 = Solid ground plane. No traces routing.

Metal Layer 3 and 4 = Control lines + VCC traces (no VCC plane).

Pour copper on each layer connected to the ground plane. Use VCC traces in a star distribution pattern.

Figure 4. SKY66108-11 Evaluation Board Schematic

Table 9. SKY66108-11 Power and Analog I/O Header: J3, 10x2

Pin Number

Evaluation Board Label

Description

Recommended setting

14, 19, 20

GND

Ground

General purpose grounds

1, 3, 5, 6, 7, 9, 11, 13, 15, 17

VCC

Supply voltage

General purpose VCC provided as the main power supply

4

VCC1

Supply voltage

General purpose VCC provided as the main power supply

2

VCC2

Supply voltage

General purpose VCC provided as the main power supply

8

VB

Bias

Output bias to transceiver

16

CTX

Control

See Table 8

10

CPS

Control

18

CSD

Control

12

CRX

Control