RFSA2724TR13 [RFMD]
Serial Controlled Digital Step Attenuator, 50MHz to 4000MHz;
| 型号： | RFSA2724TR13 |
| 厂家： | 
RF MICRO DEVICES |
| 描述： | Serial Controlled Digital Step Attenuator, 50MHz to 4000MHz 衰减器 射频 微波 |
| 文件： | 总9页 (文件大小：3018K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RFSA2724Par-
allelControlled
Digital Step
Attenuator,
50MHz to
RFSA2724
400MHz
Serial Controlled Digital Step Attenuator,
50MHz to 4000MHz
Package: MCM, 24-Pin, 4.2mm x 4.2mm
24
22
20
19
23
21
Features
1
2
18
17
GND/NC
GND/NC
GND/NC
VDD
Frequency Range 50MHz to
SPI
4000MHz
3
4
5
6
16
15
14
GND/NC
RF1
GND/NC
RF2
7-Bit, 31.75dB Range, 0.25dB
Step
7-Bit DSA
GND/NC
GND/NC
GND/NC
GND/NC
High Linearity, IP3 > 50dBm
3V and 5V Logic Compatible
Serial-to-Parallel Controller
Serial Programming Interface
Power-up Programming Modes
13
7
8
9
10
11
12
On-chip ESD Protection Class 2
< 4000V
Functional Block Diagram
Single Supply, 3V to 5V Operation
Product Description
Footprint Compatible with Most
24-Pin, 4mm x 4mm QFNs
RFMD's RFSA2724 is a 7-bit digital step attenuator (DSA) that features high-linear-
ity over the entire 31.75dB gain control range with excellent step accuracy in
0.25dB steps. The RFSA2724 is programmed via a serial mode control interface
that is both 3V and 5V compatible. The RFSA2724 also offers a rugged Class 1B
HBM ESD rating via on-chip ESD circuitry. The MCM package is footprint compatible
with most 24-pin 4mm x 4mm QFN packages.
Applications
Transceiver IF Applications
Cellular, PCS, GSM, UMTS, LTE,
WiMax/WiFi
Wireless Data, Satellite
Terminals
Test Equipment
Ordering Information
RFSA2724SR
RFSA2724SQ
RFSA2724TR13
7” Sample reel with 100 pieces
Sample bag with 25 pieces
13” Reel with 2500 pieces
RFSA2724PCK-410 50MHz to 4GHz PCBA with 5-piece sample bag
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.
DS130212
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RFSA2724
Absolute Maximum Ratings
Caution! ESD sensitive device.
Parameter
Supply Voltage
Rating
+5.5
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.
DC Supply Current
Power Dissipation
Max RF Input Power
15
mA
mW
dBm
°C
83
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.
27
Operating Temperature (T
)
-40 to +85
CASE
Storage Temperature
Junction Temperature
ESD Rating (HBM)
-40 to +150
150
°C
°C
V
Class 2 (< 4000)
Class IV (> 1000)
MSL3
ESD Rating (CDM)
V
Moisture Sensitivity Level
Specification
Parameter
Unit
Condition
Min.
Typ.
Max.
Frequency Range
Insertion Loss
50
4000
MHz
dB
0.85
1.1
1.7
2.2
150MHz, 0dB attenuation
850MHz, 0dB attenuation
2700MHz, 0dB attenuation
3800MHz, 0dB attenuation
Gain Control Range
Step Accuracy
Input IP3
Input P0.1dB
Return Loss
31.75
dB
dB
dBm
dBm
dB
0.25dB step size
(0.1 + 5.0% attenuation setting)
50
25
15
100MHz to 4000MHz
1000MHz
DC to 3500MHz, all states
Serial Interface
Control Interface
Settling Time
7-bit, Serial
200
ns
ns
V
t
t
, t
(10%/90% RF)
RISE FALL
Switching Speed
200
, t
(50% CTL to 10%/90% RF)
ON OFF
Supply Voltage (V
Supply Current
)
4.75
5.0
7.5
5.25
DD
mA
V
Control Voltage (V
)
Low, V = 0V to 0.8V
CTL
CTL
High, V = 2.0 to V
CTL
DD
Notes:
1. V = 5V, V = 5V, T = 25°C.
DD
CTL
2. IIP3 measured with P = +10dBm/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
DS130212
RFSA2724
Typical Performance: Broadband Application Circuit (25°C)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ((+1) 336-678-5570 or customerservice@rfmd.com.
DS130212
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RFSA2724
Typical Performance: Broadband Application Circuit (25 °C)
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
DS130212
RFSA2724
Truth Table
Control Bit
Relative Gain
Setting
C16
1
C8
1
C4
1
C2
1
C1
1
C0.5
C0.25
1
1
0
1
1
1
1
1
0
1
0
1
1
1
1
1
1
0
Max gain
-0.25dB
-0.5dB
-1dB
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
-2dB
1
1
0
1
1
-4dB
1
0
1
1
1
-8dB
0
1
1
1
1
-16dB
-31.75dB
0
0
0
0
0
Note: C0.25 = D0, C0.5 = D1, …, C16 = D6 (for the purpose of the example below)
Serial Port Interface
SPI Timing Diagram
Programming example – 7 bit
t6
t1
t2
CLK
t3
MSB
D6
t8
LSB
D0
t4
t5
DATA
D5
D4
D3
D2
D1
CLK
DATA
LE
LE
t7
t9
DOUT
t10
SPI Timing Diagram Specifications
Parameter
Limit
25
20
20
5
Unit
MHz max
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns max
Comment
CLK Frequency
CLK High
Logic Voltage Levels
t1
t2
t3
t4
t5
t6
t7
t8
t9
t10
State
Logic
Low
0V to 0.8V
CLK Low
High
2.0V to 5.0V
DATA to CLK Setup Time
DATA to CLK Hold Time
DATA Valid
5
30
5
LE to CLK Setup Time
CLK to LE Setup Time
LE Pulse Width
Output Set
5
10
20
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ((+1) 336-678-5570 or customerservice@rfmd.com.
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RFSA2724
Pin Names and Description
Pin
1
2
3
4
5
6
7
8
Function
NC
VDD
GND
RF1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
RF2
Description
No Internal Connection. EVB can be ground or no connect.
Power Supply.
DC and RF Ground.
RF Port. External DC Block Required.
DC and RF Ground.
DC and RF Ground.
DC and RF Ground.
DC and RF Ground.
DC and RF Ground.
9
DC and RF Ground.
10
11
12
13
14
15
16
17
18
19
20
DC and RF Ground.
DC and RF Ground.
DC and RF Ground.
DC and RF Ground.
RF Port. External DC Block Required.
DC and RF Ground.
GND
GND
GND
NC
DC and RF Ground.
DC and RF Ground.
No Internal Connection. EVB can be ground or no connect.
Power-up Programming Pin.
Low = Max Attenuation (31.75dB) 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
24
EPAD
NC
DATA
GND
Serial Data.
DC and RF Ground. Must be soldered to EVB ground plane over a bed of vias for thermal and RF performance.
Power-up Programming Truth Table
PUP
Low
Attenuator Setting
Attenuation at Max, 31.75dB
Attenuation at Min, 0dB
High
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
DS130212
RFSA2724
Package Outline Drawing
4.200 0.ꢀ0
ꢀ.340 0.04
0.260 Typ
A
A
A
A
A
A
6x 3.900
2x 3.350
2x 2.850
B
B
B
B
B
B
B
B
B
B
B
B
2x 2.350
2.ꢀ00
2x ꢀ.850
C
4.200 0.ꢀ0
2x ꢀ.350
2x 0.850
0.ꢀ00
All Edges
A
A
A
A
A
A
6x 0.300
0.000
0.440
Ref
Notes:
ꢀ. Shaded area represents Pin ꢀ location
2. Defining I/O Pad Center:
To define center of the I/O pad opening, draw a right triangle
in one corner of the I/O pad
Then take the center of the hypotenuse to determine center
of I/O pad
A = 0.250 x 0.400 mm Typ
B = 0.400 x 0.250 mm Typ
C = 2.680 x 2.680 mm
Branding Diagram
4.200
SA2724
YYWW
Trace
4.200
Pin 1 Indicator
Fill in the YYWW Notation with the Date Code
YY = Year
WW = Week
Trace to be assigned by SubCon
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ((+1) 336-678-5570 or customerservice@rfmd.com.
DS130212
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RFSA2724
Evaluation Board Assembly Drawing
ꢀ2
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
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RFSA2724
Evaluation Board Schematic
Evaluation Board Bill of Materials (BOM)
Description
Reference Designator
Manufacturer
Manufacturer’s P/N
SA2714410(A)
Dynamic Details (DDI)
Toronto
SA2714410(A)
Digital Step Attenuator 50MHz to 4000MHz
CAP, 470pF, 10%, 50V, X7R, 0402
CAP, 1000pF, 10%, 50V, X7R, 0402
RES, 0ꢀ, 0402
U1
RFMD
Murata Electronics
Taiyo Yuden (USA), Inc.
Kamaya, Inc
RFSA2724SB
GRM155R71H471KA01E
RM UMK105BJ102KV-F
RMC1/16SJPTH
SD-73251-4000
MPSS100-9-C
C11-C12
C7
R1-R2, R4-R5, R8
J1-J2, J99-J100
P1
CONN, SMA, END LNCH, UNIV, HYB MNT, FLT
CONN, HDR, ST, PLRZD, 9-PIN
Molex
ITW Pancon
CONN, SKT, 24-PIN DIP, .600", T/H
MOD, USB TO SERIAL UART, SSOP-28
P2
Aries Electronics Inc.
24-6518-10
M1 (See Note Below)
Future Technology Devices
Int'l
UM232R
DNP
DNP
C1-C6, C8-C9, C13-C20
R3, R6-R7
NA
NA
NA
NA
Note: M1 should be mounted into P2 with respect to the Pin 1 alignment of M1 and P2
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at ((+1) 336-678-5570 or customerservice@rfmd.com.
DS130212
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