RFSA3715 Datasheet, PDF (12/20 Pages) RF Micro Devices – 5MHz to 4000MHz, Digital Step Attenuator

RFSA3715
Evaluation Board Jumper Programming
Jumpers
S1
S2
Connector
Signal
Logic
Voltage
PBar/S
Position
0
1
0
1
0
S3
P3
AO
1
0
S4
A1
1
0
S5
A2
1
OPEN
S6
P4
LE
INSTALLED
Note: Default jumper settings are BOLD.
U1 Connection
VDD (From P6)
VIO (From P5)
GND
U1_VDD
GND
U1_VDD
GND
U1_VDD
GND
U1_VDD
LE
LE (From P5 Pin 3)
Comment
Parallel Mode
Serial Mode
External Address
External Address
External Address
All Other Modes
Serial Mode Using P5
Evaluation Board Programming Using USB Interface
Serial Addressable Mode
All programming jumpers on the evaluation board are set to the default values indicated in the table. Refer to the
Control Bit Generator (CBG) Software Reference Manual for detailed instructions on how to setup the software for use.
Apply the supply voltage to P6. Select ‘RFSA3715’ from the RFMD parts list of the CBG user interface. Set the
attenuation value using the CBG user interface. The attenuator is set to the desired state and measurements can be
taken. Note that the external address bits must all be set to ‘0’ when using the USB interface as the CGB software
does not have the capability to set the external address in the serial data stream at this time.
Latched Parallel Mode
Evaluation board programming jumper S2 is set to ‘0’. All other programming jumpers are not required and can be set
to any position. Refer to the Control Bit Generator (CBG) Software Reference Manual for detailed instructions on how
to setup the software for use. Apply the supply voltage to P6. Select ‘RFSA3715-P’ from the RFMD parts list of the
CBG user interface. Set the attenuation value using the CBG user interface. The attenuator is set to the desired state
and measurements can be taken.
RF Micro Devices Inc. 7628 Thorndike Road, Greensboro, NC 27409-9421
DS150205
For sales or technical support, contact RFMD at +1.336.678.5570 or [e-mail].
The information in this publication is believed to be accurate. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents or other rights of
third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended
application circuitry and specifications at any time without prior notice.
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