RFSA3413

5 MHz to 6000 MHz Digital Step Attenuator

Datasheet March 5, 2019 | Subject to change without notice

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RFSA3413 Programming by Using USB Interface

Refer to Qorvo Control Bit Generator (CBG) Software Reference Manual for detailed instructions on how to setup the

software for use. Apply the supply voltage to P3. Select RFSA3413 from the Qorvo Parts List of the CBG user interface.

Set the attenuation value using the CBG Graphic User Interface (GUI). The attenuator is set to the desired state and

measurements can be taken.

RFSA3413 Programming by Using Its Parallel Bus

This configuration allows the user to control the attenuator through the P1 connector using an external

harness. Remove the USB interface board if it is currently installed on the evaluation board. Connect a user-

supplied harness to the P1 connector. The parallel bus signal names for P1 are indicated on the evaluation

board. Cross reference for device pin names to P1 connector signals is as follows: C1 = D2, C2 = D3, C4 =

D4, C8 = D5. Apply the supply voltage to P3. Send the appropriate signals onto the parallel bus lines in

accordance with the Parallel Interface Attenuation Truth Table. The attenuator is set to the desired state and

measurements can be taken.

Power-up State

The default state is minimum attenuation (0dB) when supply voltage is applied to the attenuator. If a different

attenuation state is desired during power up, this can be accomplished by applying signals according to the

Parallel Interface Attenuation Truth Table. The attenuator will power up to the state applied to the parallel

bus during turn on.

Control Bit Truth Table (Major States)

D5

(C8)

D4

(C4)

D3

(C2)

D2

(C1)

Attenuation State

H

H

H

H

0 dB *

H

H

H

L

1 dB

H

H

L

H

2 dB

H

L

H

H

4 dB

L

H

H

H

8 dB

L

L

L

L

15 dB

*0 dB Reference State with the Insertion Loss as specified