5

5 - 174

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20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

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Pin Descriptions

Pin Number

Function

Description

Interface Schematic

1Vdd

Supply Voltage.

2, 11

RF1, RF2

This pin is DC coupled and matched to 50 Ohm.

Blocking capacitors are required.

Select value based on lowest frequency of operation.

3, 7, 9, 10, 12

N/C

These pins should be connected to PCB RF ground to

maximize performance.

4 - 6, 8

ACG1 - ACG4

External capacitor to ground is required. Select value for

lowest frequency of operation. Place capacitor as close

to pins as possible.

13 - 16

V1 - V4

See truth table and control voltage table.

GND

Package bottom has an exposed metal paddle that must be

connected to RF/DC Ground.

Application Circuit

1 dB LSB GaAs MMIC 4-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz

v00.0605

Recommended Component Values

C1 - C3

1,000 pF ± 10%

C4, C5

330 pF ± 10%