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PDF RFSA2654 Data sheet ( Hoja de datos )
| Número de pieza | RFSA2654 | |
| Descripción | DIGITAL STEP ATTENUATOR | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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RFSA2654
Serial Con-
trolled 75W
Digital Step
Attenuator
5MHz to
2000MHz, 6-
Bit, 0.5dB LSB
RFSA2654
SERIAL CONTROLLED 75DIGITAL STEP
ATTENUATOR 5MHz TO 2000MHz, 6-BIT, 0.5dB
Package: MCM, 24-Pin, 4.2mm x 4.2mm
24 23 22 21 20 19
Features
Frequency Range 5MHz to
2000MHz
6-Bits, 75, 31.5dB Range,
0.5dB Step
High Linearity, IIP3 >50dBm
3V and 5V Logic Compatible
Serial-to-Parallel Controller
Serial Programming Interface
Power-up Programming Modes
On-chip ESD Protection Class 1C
HBM
Single Supply, 5V Operation
Footprint Compatible with Most
24-Pin, 4mm x 4mm, QFNs
Applications
CATV/Satellite Set Top Boxes
Cable Modems
CATV Infrastructure
Data Network Equipment
GND 1
VCC 2
GND 3
RF1 4
GND 5
GND 6
SPI
6-Bit DSA
18 GND
17 GND
16 GND
15 RF2
14 GND
13 GND
7 8 9 10 11 12
Functional Block Diagram
Product Description
RFMD's RFSA2654 is a 6-bit, 75 digital step attenuator (DSA) that features high
linearity over the entire 31.5dB gain control range with excellent step accuracy in
0.5dB steps. The RFSA2654 is programmed via a serial mode control interface that
is both 3V and 5V compatible. The RFSA2654 also offers a rugged Class 1C HBM
ESD rating via on-chip ESD circuitry. The MCM package is footprint compatible with
most 24-pin 4mm x 4mm QFN packages.
Ordering Information
RFSA2654SQ
Sample bag with 25 pieces
RFSA2654SR
7” Sample reel with 100 pieces
RFSA2654TR13 13” Reel with 2500 pieces
RFSA2654PCK-410 5MHz to 2000MHz PCBA with 5-piece sample bag
DS121031
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
SiGe BiCMOS
Si BiCMOS
GaAs pHEMT
Si CMOS
GaN HEMT
BiFET HBT
InGaP HBT
SiGe HBT
Si BJT
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2012, RF Micro Devices, Inc.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
1 of 9
1 page  
RFSA2654
CLK
t4
DATA
LE
t7
DOUT
Serial Port Interface
SPI Timing Diagram
t6
t1
t2
t3
t5
t8
CLK
DATA
LE
t9
t10
Programming Example - 6-Bit
MSB
D5 D4
D3
LSB
D2 D1 D0
C16 C8
11
11
11
11
11
10
01
00
Truth Table
Control Bits
C4 C2
11
11
11
10
01
11
11
00
SPI Timing Diagram Specifications
Parameter
t1
Limit
25
Unit
MHz max
Comment
CLK Frequency
t2 20 ns min
CLK High
t3 20 ns min
CLK Low
t4
5
ns min
DATA to CLK Setup Time
t5
5
ns min
DATA to CLK Hold Time
t6 30 ns min
Data Valid
t7
5
ns min
LE to CLK Setup Time
t8
5
ns min
CLK to LE Setup Time
t9
10 ns min
LE Pulse Width
t10 20 ns min
Output Set
Relative Gain
C1 C0.5 Setting
1 1 Max gain
1 0 -0.5dB
0 1 -1dB
1 1 -2dB
1 1 -4dB
1 1 -8dB
1 1 -16dB
0 0 -31.5dB
Logic Voltage Levels
State
Logic
Low 0V to 0.8V
High 2.0V to 5.0V
Power-up Programming Truth Table
PUP Attenuator Setting
Low Attenuation at max, 31.5dB
High Attenuation at min, 0dB
DS121031
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet RFSA2654.PDF ] | |
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