DATA SHEET • SKY73001 DIRECT CONVERSION MIXER

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

101907E • Skyworks Proprietary and Confidential information • Products and Product Information are Subject to Change Without Notice • March 15, 2006

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Evaluation Board Description

The SKY73001 Evaluation Board is used to test the performance

of the SKY73001 direct conversion mixer. An Evaluation Board

schematic diagram (500-2500 MHz) is shown in Figure 8.

Evaluation Board assembly diagrams are shown in Figure 9

(2-2500 MHz) and Figure 10 (3200-3500 MHz). Bills of Material

(BOMs) are provided in Table 5 (2-500 MHz and 500-2500 MHz)

and Table 6 (3200-3500 MHz).

Circuit Design Configurations

The following design considerations are general in nature and

must be followed regardless of final use or configuration.

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

2. The ground pad of the SKY73001 direct conversion mixer has

special electrical and thermal grounding requirements. This

pad is the main thermal conduit for heat dissipation. Since the

circuit board acts as the heat sink, it must shunt as much

heat as possible from the mixer. As such, design the

connection to the ground pad to dissipate the maximum

wattage produced to the circuit board. Multiple vias to the

grounding layer are required.

3. Two external output bypass capacitors are required on the

VCC pins. The values of these capacitors will change with

respect to the desired RF frequency. One capacitor should be

used for low frequency bypassing and the other capacitor for

high frequency bypassing. Special attention should be given

so that the smaller value capacitor does not go into self-

resonance at the desired RF frequency.

4. Wire wound balanced transformers (baluns) were used during

the test and characterization of the SKY73001. Ceramic

baluns can be used to create the differential input signals (i.e.,

RF and LO). However, their performance will limit the overall

system performance of the SKY73001.

Testing Procedure

Use the following procedure to set up the SKY73001 Evaluation

Board for testing. Refer to Figure 11 for guidance:

1. Connect a +3.0 VDC power supply using an insulated supply

cable. If available, enable the current limiting function of the

power supply to 100 mA.

2. Connect a signal generator to the RF signal input port. Set it to

the desired RF frequency at a power level of 0 dBm to the

Evaluation Board but do NOT enable the RF signal.

3. Connect a signal generator to the LOQ signal input port. Set to

the desired LO frequency at a power level of 0 dBm, but do

not enable.

4. Connect a spectrum analyzer to the IFQ signal output port and

terminate the IFI signal input port in 50

Ω.

5. Enable the power supply.

6. Enable the LO input signal.

7. Enable the RF signal.

8. Take measurements and repeat these steps for channel I.

CAUTION: If any of the input signals exceed the rated maximum

values, the SKY73001 Evaluation Board can be

permanently damaged.

Package and Handling Information

Since the device package is sensitive to moisture absorption, it is

baked and vacuum packed before shipping. Instructions on the

shipping container label regarding exposure to moisture after the

container seal is broken must be followed. Otherwise, problems

related to moisture absorption may occur when the part is

subjected to high temperature during solder assembly.

The SKY73001 is rated to Moisture Sensitivity Level 3 (MSL3) at

260

°C. It can be used for lead or lead-free soldering. For

additional information, refer to the Skyworks Application Note,

PCB Design & SMT Assembly/Rework Guidelines for RFLGA

Packages, document number 103147.

Care must be taken when attaching this product, whether it is

done manually or in a production solder reflow environment.

Production quantities of this product are shipped in a standard

tape and reel format. For packaging details, refer to the Skyworks

Application Note, Tape and Reel, document number 101568.

Electrostatic Discharge (ESD) Sensitivity

The SKY73001 is a static-sensitive electronic device. Do not

operate or store near strong electrostatic fields. Take proper ESD

precautions.