6

6 - 18

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Pin Number

Function

Description

Interface Schematic

1, 3, 4, 6, 10, 12, 13,

15, 16, 18

N/C

These pins should be connected to PCB RF ground to

maximize performance.

2, 17

RF1, RF2

This pin is DC coupled and matched to 50 Ohms

Blocking capacitors are required. Select value based on

lowest frequency of operation.

5Serial Output

Serial data output. Serial input data

delayed by 8 clock cycles.

7Reset

See truth table, control voltage table and timing diagram.

8

Shift Clock

9

Latch Enable

11

Serial Input

14

Vcc

Supply Voltage.

19 - 24

GND

Package bottom has an exposed metal paddle that must also

be connected to RF/DC Ground.

Pin Descriptions

1 dB LSB GaAs MMIC 5-BIT SERIAL

CONTROL DIGITAL ATTENUATOR, 0.7 - 3.7 GHz

v02.0705