DATA SHEET • SKY66296-11: 700 TO 800 MHz HIGH EFFICIENCY 4 W POWER AMPLIFIER

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

203931C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • May 31, 2017

7

–40

–36

–32

–28

–24

–20

–16

–12

728

733

738

743

748

753

758

763768

Vcc (V)

–40 °C

+25 °C

+85°C

Figure 15. Input Return Loss vs Frequency Across Temperature

–16.0

–15.5

–15.0

–14.5

–14.0

–13.5

–13.0

–12.5

–12.0

728

733

738

743

748

753

758

763768

Vcc (V)

–40 °C

+25 °C

+85°C

Figure 16. Output Return Loss vs Frequency Across Temperature

Evaluation Board Description

The SKY66296-11 Evaluation Board is used to test the

performance of the SKY66296-11 PA. An Application schematic is

provided in Figure 17. Table 6 provides the Bill of Materials (BOM)

list for Evaluation Board components.

An assembly drawing for the Evaluation Board is shown in

Figure 18. Layer details are shown in Figure 19. Layer details

physical characteristics are noted in Figure 20.

Circuit Design Considerations

The following design considerations are general in nature and

must be followed regardless of final use or configuration:

 Paths to ground should be made as short as possible.

 The ground pad of the SKY66296-11 has special electrical and

thermal grounding requirements. This pad is the main thermal

conduit for heat dissipation. Because the circuit board acts as

the heat sink, it must shunt as much heat as possible from the

device.

Therefore, design the connection to the ground pad to dissipate

the maximum wattage produced by the circuit board. Multiple

vias to the grounding layer are required.

NOTE: A poor connection between the ground pad and ground

device.

Evaluation Board Test Procedure

Turn-On Sequence

1.

Connect 50

 test equipment or load to the input and

output RF ports of the Evaluation Board.

2.

Connect the DC ground.

3.

Connect all VCCs and VBIAS lines to a +5 V supply.

Connect PAEN to a 2.0 V supply.

4.

Without applying RF, turn on the 5 V supply, then turn on

the 2 V PAEN.

5.

Apply RF signal at –30 dBm and observe that the gain of

the device complies with the values in Table 5. Begin

measurements.

Turn-Off Sequence

1.

Turn off the RF input to the device.

2.

Turn off PAEN (set to 0 V).

3.

Turn off all VCCs and VBIAS.

NOTE: It is important to adjust the VCC voltage sources so that

+5 V is measured at the board. High collector currents drop the

collector voltage significantly if long leads are used. Adjust the

bias voltage to compensate.