RFSA2654SR [RFMD]
SERIAL CONTROLLED 7 DIGITAL STEP ATTENUATOR 5MHz TO 2000MHz, 6-BIT, 0.5dB;
| 型号： | RFSA2654SR |
| 厂家： | 
RF MICRO DEVICES |
| 描述： | SERIAL CONTROLLED 7 DIGITAL STEP ATTENUATOR 5MHz TO 2000MHz, 6-BIT, 0.5dB 衰减器 射频 微波 |
| 文件： | 总9页 (文件大小：791K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RFSA2654
Serial Con-
trolled 75W
Digital Step
Attenuator
5MHz to
RFSA2654
ATTENUATOR 5MHz TO 2000MHz, 6-BIT, 0.5dB
2000MHz, 6-
Bit, 0.5dB LSB
SERIAL CONTROLLED 75DIGITAL STEP
Package: MCM, 24-Pin, 4.2mm x 4.2mm
24
23
22
21
20
19
GND
GND
VCC
GND
1
2
3
18
17
16
Features
Frequency Range 5MHz to
2000MHz
SPI
GND
GND
6-Bits, 75, 31.5dB Range,
0.5dB Step
RF2
15
14
13
4
RF1
GND
GND
High Linearity, IIP3 >50dBm
3V and 5V Logic Compatible
Serial-to-Parallel Controller
Serial Programming Interface
Power-up Programming Modes
GND
6-Bit DSA
5
6
GND
7
8
9
11
12
10
On-chip ESD Protection Class 1C
HBM
Functional Block Diagram
Single Supply, 5V Operation
Product Description
Footprint Compatible with Most
24-Pin, 4mm x 4mm, QFNs
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.
Applications
CATV/Satellite Set Top Boxes
Cable Modems
CATV Infrastructure
Data Network Equipment
Ordering Information
RFSA2654SQ
RFSA2654SR
RFSA2654TR13
Sample bag with 25 pieces
7” Sample reel with 100 pieces
13” Reel with 2500 pieces
RFSA2654PCK-410 5MHz to 2000MHz PCBA with 5-piece sample bag
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
GaN HEMT
BiFET HBT
Si CMOS
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 customerservice@rfmd.com.
DS121031
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RFSA2654
Absolute Maximum Ratings
Caution! ESD sensitive device.
Parameter
Rating
Unit
V
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical perfor-
mance or functional operation of the device under Absolute Maximum Rating condi-
tions is not implied.
Supply Voltage
+5.5
DC Supply Current
15
83
mA
mW
dBm
°C
The information in this publication is believed to be accurate and reliable. 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 appli-
cation circuitry and specifications at any time without prior notice.
Power Dissipation
Max RF Input Power
Operating Temperature (T
28.3
)
-40 to +85
CASE
Storage Temperature
Junction Temperature
ESD Rating (HBM)
-40 to +150
150
°C
°C
RFMD Green: RoHS compliant per EU Directive 2002/95/EC, halogen free
per IEC 61249-2-21, < 1000ppm each of antimony trioxide in polymeric
materials and red phosphorus as a flame retardant, and <2% antimony in
solder.
Class 1C
MSL3
Moisture Sensitivity Level
Nominal Operating Parameters
Specification
Unit
Parameter
Overall
Condition
Min.
Typ.
Max.
5V, 25°C, 75, typical condition unless other-
wise stated.
Frequency Range
Insertion Loss
5
2000
MHz
dB
0.69
1.3
5MHz, 0dB attenuation
880MHz, 0dB attenuation
1200MHz, 0dB attenuation
1880MHz, 0dB attenuation
2000MHz, 0dB attenuation
0.5dB step size
dB
1.92
2.21
2.29
31.5
dB
dB
dB
Gain Control Range
Step Accuracy
Input IP3
dB
±(0.1 + 5.0% attenuation setting)
dB
46
52
dBm
30MHz to 2000MHz, all states, tested into
50, minimum at 31.5dbm attenuation
Input P0.5dB
25
30
dBm
dBm
100MHz, all states, tested into 50
27
200MHz to 2000MHz, 27dBm for 8, 16-bit
Steps, tested into 50
Input Return Loss
Output Return Loss
Control Interface
Settling Time
11
11
17.5
17.5
dB
dB
bit
ns
5MHz to 1200MHz, all states
5MHz to 1200MHz, all states
Serial interface
6-bit, Serial
200
t
t
, t
(10%/90% RF)
RISE FALL
Switching Speed
200
5.0
5.7
ns
V
, t
(50% CTL to 10%/90% RF)
ON OFF
Supply Voltage (V
Supply Current
)
4.75
5.25
Typical performance based on 5V operation.
DD
mA
V
Control Voltage (V
)
Low, V = 0V to 0.8V
CTL
CTL
High, V = 2.0V to V
V
CTL
DD
Notes:
1. V = 5V, V = 5V, T = 25°C
DD
CTL
2. IIP3 measured with P = +12dBm/tone, 1MHz spacing
IN
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
2 of 9
DS121031
RFSA2654
Typical Performance - Broadband Application Circuit
Insertion Loss versus Frequency
Normalized Attenuation versus Frequency
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
-5
-10
-15
-20
-25
-30
-35
0.5dB
4dB
31.5dB
1dB
8dB
2dB
16dB
-40°C
25°C
85°C
0
500
1,000
1,500
2,000
2000
2000
0
500
1000
1500
2000
Frequency (MHz)
Frequency (MHz)
Input Return Loss versus Frequency
Output Return Loss versus Frequency
45
40
35
30
25
20
15
10
5
45
40
35
30
25
20
15
10
5
0dB
1dB
4dB
16dB
0.5dB
2dB
8dB
0dB
1dB
4dB
16dB
0.5dB
2dB
31.5dB
8dB
31.5dB
0
0
0
500
1000
Frequency (MHz)
1500
0
500
1000
Frequency (MHz)
1500
2000
Relative Phase versus Frequency
Worst Case Step Error Between
Successive States
50
40
30
20
10
0
0.5dB
2dB
8dB
1dB
4dB
16dB
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
31.5dB
-10
0
500
1000
Frequency (MHz)
1500
0
500
1000
Frequency (MHz)
1500
2000
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS121031
3 of 9
RFSA2654
Typical Performance - Broadband Application Circuit
Major Step Error versus Frequency
Step Error versus Attenuation
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
1.0
0.8
5MHz
300MHz
800MHz
1800MHz
1200MHz
0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
0.5dB
2dB
8dB
31.5dB
1dB
4dB
15.5dB
0
500
1000
1500
2000
0
4
8
12
16
20
24
28
32
Frequency (MHz)
Attenuation (dB)
Input IP3 versus Frequency
Input P0.5dB versus Frequency
60
55
50
45
40
35
35
30
25
20
15
0dB
1dB
4dB
16dB
0.5dB
2dB
0dB
1dB
4dB
16dB
0.5dB
2dB
8dB
31.5dB
8dB
31.5dB
30
0
500
1000
1500
2000
0
400
800
1200
1600
2000
Frequency (MHz)
Frequency (MHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
4 of 9
DS121031
RFSA2654
Serial Port Interface
SPI Timing Diagram
Programming Example - 6-Bit
t6
t1
t2
t3
t8
t4
t7
t5
CLK
CLK
DATA
LE
MSB
LSB
DATA
D5
D4
D3
D2
D1
D0
LE
t9
DOUT
t10
Truth Table
Control Bits
Relative Gain
Setting
C16
C8
1
C4
C2
1
C1
1
C0.5
1
1
1
1
1
1
0
0
1
1
1
1
0
1
1
0
1
0
1
1
1
1
1
0
Max gain
-0.5dB
-1dB
1
1
1
1
1
0
1
0
1
-2dB
1
1
1
-4dB
0
1
1
-8dB
1
1
1
-16dB
-31.5dB
0
0
0
SPI Timing Diagram Specifications
Parameter
Limit
Unit
Comment
Logic Voltage Levels
Logic
t1
25
MHz max
CLK Frequency
State
t2
t3
20
20
5
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
CLK High
CLK Low
Low
0V to 0.8V
High
2.0V to 5.0V
t4
DATA to CLK Setup Time
DATA to CLK Hold Time
Data Valid
t5
5
Power-up Programming Truth Table
t6
t7
30
5
PUP
Low
Attenuator Setting
LE to CLK Setup Time
CLK to LE Setup Time
LE Pulse Width
Attenuation at max, 31.5dB
t8
5
High
Attenuation at min, 0dB
t9
10
20
t10
Output Set
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS121031
5 of 9
RFSA2654
Evaluation Board Schematic
Evaluation Board Bill of Materials (BOM)
Description
Reference
Designator
Manufacturer
Manufacturer’s P/N
Evaluation Board
SA2654410(A
RFSA2654
RFSA2654
U1
C7
RFMD
CAP, 1nF, 10%, 10V, X5R, 0402
CAP, 10000pF, 10%, 25V, X7R, 0402
RES, 0Ω, 5%, 1/16W, 0402
DNP
Taiyo Yuden (USA), Inc.
Murata Electronics
Kamaya, Inc
RM UMK105BJ102KV-F
GRM155R71E103KA01D
RMC1/16SJPTH
C11-C12*
R1-R2, R4-R5, R8
R3, R6-R7, R9
C1-C6, C8-C9, C13-C20
J1-J2
DNP
CONN, F FEM EDGE MOUNT, 75Ω, 0.035"
Millimeter Wave Technologies,
LLC
MW-846-F-DD-75
DNP
J99-J100
P1
CONN, HDR, ST, PLRZD, 9-PIN
CONN, SKT, 24-PIN DIP, .600", T/H
ITW Pancon
MPSS100-9-C
24-6518-10
P2
Aries Electronics Inc.
* Evaluation board shipped with 470pF C11-C12 to support 2GHz operation. 10,000pF required for 5MHz operation.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
6 of 9
DS121031
RFSA2654
Evaluation Board Assembly Drawing
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS121031
7 of 9
RFSA2654
Pin Names and Descriptions
Pin
1
2
3
4
5
6
7
8
Name
GND
VDD
GND
RF1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
RF2
GND
GND
GND
NC
Description
Connect to Low Inductance Path to Ground.
Power Supply.
Connect to Low Inductance Path to Ground.
RF port. External DC block required.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
RF port. External DC block required.
9
10
11
12
13
14
15
16
17
18
19
20
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
Connect to Low Inductance Path to Ground.
No internal connection. EVB can be ground or no connect.
Power-up Programming pin.
Low = max attenuation (31.5dB) at power-up.
High = min attenuation (0dB) at power-up.
PUP
Serial Clock.
21
22
CLK
LE
Latch Enable.
No internal connection; EVB can be ground or no connect.
23
NC
Serial Data.
24
EPAD
DATA
GND
DC and RF Ground; Must be soldered to EVB ground plane over a bed of vias for thermal and RF performance.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
8 of 9
DS121031
RFSA2654
Package Drawing
Branding Diagram
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS121031
9 of 9
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