250 mW Linear Power Amplifier and T/R Switch

AM55-0004

Specifications Subject to Change Without Notice

V 2.00

M/A-COM Inc.

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1011 Pawtucket Boulevard, Lowell, MA 01853 USA

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Telephone: 800-366-2266

8

In order to prevent transients which may damage the MMIC, please adhere to the following procedure.

• Turn on all power supplies and set all voltages to 0 volts BEFORE connecting the power supplies to the

DC connector.

• Apply -4.0 volt supply or GND to DC connector pin 9 (VSW, see truth table for desired mode).

• Apply -4.0 volt supply or GND to DC connector pin 13 (VSW, see truth table for desired mode).

• Apply a -4.0 volt supply to the DC connector pin 16 (V

• Apply a -4.0 volt supply to the DC connector pin 18 (V

• Apply a +4.8 volt supply to the DC connector pin 2 (V

• Apply a +4.8 volt supply to the DC connector pin 20 (V

• Apply GND to DC connector pin 5 (Save Tx).

• Adjust V

• Adjust V

• Change voltage on DC connector pin 5 as required (Save Tx, see truth table for desired mode).

• Apply RF power and test.

• To power off, reverse above procedure

1. Set V

2. Set V

3. Set control voltage supplies to 0 V.

4. Disconnect bias lines from DC connector.

5. Turn off power supplies.

Port Reference

Estimated Loss (dB)

PA IN

0.15

PA OUT

0.20

Tx IN

0.20

ANT IN/OUT

0.20

Rx OUT

0.20

AM55-0004SMB Biasing Procedure

Evaluation PCB and RF Connector Losses

The DC connector on the Designer’s Kit PCB allows selection of all the device’s operating modes.

It is accomplished by one or more of the following methods:

1. A mating female multi-pin connector (Newark Electronics

Stock # 46F-4658, not included)

2. Wires soldered to the necessary pins (not included)

3. Clip leads (not included)

4. A combination of clip leads or wires and jumpers

(jumpers included as required)