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RFSA2644TR13 [RFMD]

SERIAL CONTROLLED DIGITAL STEP ATTENUATOR 50MHz TO 4000MHz, 6-BIT, 0.5dB LSB;
RFSA2644TR13
型号： RFSA2644TR13
厂家： RF MICRO DEVICES    RF MICRO DEVICES
描述：

SERIAL CONTROLLED DIGITAL STEP ATTENUATOR 50MHz TO 4000MHz, 6-BIT, 0.5dB LSB

衰减器 射频 微波
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RFSA2644  
Serial Con-  
trolled Digital  
Step Attenua-  
tor  
RFSA2644  
SERIAL CONTROLLED DIGITAL STEP ATTENUATOR  
50MHz TO 4000MHz, 6-BIT, 0.5dB LSB  
Package: MCM, 24-Pin, 4.2mm x 4.2mm  
24  
22  
20  
19  
23  
21  
1
2
18  
17  
GND  
GND  
GND  
VDD  
Features  
Frequency Range 50MHz to  
4000MHz  
SPI  
3
4
5
6
16  
15  
14  
13  
GND  
RF1  
GND  
RF2  
6-Bits, 31.5dB Range, 0.5dB  
Step  
High Linearity, IP3 >48dBm  
3V and 5V Logic Compatible  
Serial-to-Parallel Controller  
Serial Programming Interface  
Power-up Programming Modes  
6-Bit DSA  
GND  
GND  
GND  
GND  
7
8
9
10  
11  
12  
On-Chip ESD Protection Class 1C  
HBM  
Functional Block Diagram  
Single Supply, 3V to 5V Operation  
Product Description  
Footprint Compatible with Most  
24-Pin, 4mm x 4mm, QFNs  
RFMD’s RFSA2644 is a 6-bit digital step attenuator (DSA) that features high linear-  
ity over the entire 31.5dB gain control range with excellent step accuracy in 0.5dB  
steps. The RFSA2644 is programmed via a serial mode control interface that is  
both 3V and 5V compatible. The RFSA2644 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  
Transceiver RF and IF  
Applications  
Cellular, PCS, GSM, UMTS, LTE,  
WiMax/WiFi  
Wireless Data, Satellite  
Terminals  
Test Equipment  
Ordering Information  
RFSA2644SR  
RFSA2644SQ  
RFSA2644TR7  
RFSA2644TR13  
7” Sample reel with 100 pieces  
25-Piece sample bag  
7” Reel with 750 pieces  
13” Reel with 2500 pieces  
RFSA2644PCK-410 50MHz to 4000MHz 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.  
DS120706  
1 of 12  
RFSA2644  
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  
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.  
28.3  
Operating Temperature (T  
)
-40 to +85  
CASE  
Storage Temperature  
Junction Temperature  
ESD Rating (HBM)  
-40 to +150  
150  
°C  
°C  
V
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  
Specification  
Parameter  
Unit  
Condition  
Min.  
Typ.  
Max.  
Frequency Range  
Insertion Loss  
50  
4000  
MHz  
dB  
5V, 25°C unless otherwise stated  
50MHz, 0dB attenuation  
500MHz, 0dB attenuation  
880MHz, 0dB attenuation  
2140MHz, 0dB attenuation  
2700MHz, 0dB attenuation  
4000MHz, 0dB attenuation  
0.5dB step size  
0.6  
0.7  
0.8  
1.2  
1.4  
1.8  
31.5  
dB  
dB  
dB  
dB  
Gain Control Range  
Step Accuracy  
Input IP3  
dB  
±(0.1+5% attenuation range)  
dB  
48  
55  
20.2  
30  
dBm  
dBm  
dBm  
dBm  
dBm  
dBm  
dBm  
Input P0.5dB  
20  
28  
Under 100MHz, all states  
150MHz to 1000MHz, all states  
Under 2700MHz  
Input Return Loss  
Output Return Loss  
13  
29  
10  
18  
2700MHz to 4000MHz  
Under 2700MHz  
13  
27  
11.5  
22  
2700MHz to 4000MHz  
Serial interface  
Control Interface  
Settling Time  
6-Bit, Serial  
200  
nS  
nS  
V
t
t
, t  
(10%/90% RF)  
RISE FALL  
Switching Speed  
200  
5.0  
5.2  
, t  
(50% CTL to 10%/90% RF)  
ON OFF  
Supply Voltage (V  
Supply Current  
)
4.75  
5.25  
DD  
mA  
V
Control Voltage (V  
)
Low, V = 0 to 0.8V  
CTL  
CTL  
High, V = 2.0 to V  
V
CTL  
DD  
Notes:  
1. V = 5V, V = 5V, T = 25°C  
DD  
CTL  
2. IIP3 measured with P = 17dBm/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 12  
DS120706  
RFSA2644  
Specification  
Typ.  
Parameter  
Unit  
Condition  
Min.  
Max.  
Frequency Range  
50  
4000  
MHz  
dB  
3V, 25°C unless otherwise stated  
Insertion Loss  
0.7  
0.7  
1.0  
1.2  
1.5  
1.8  
31.5  
50MHz, 0dB attenuation  
500MHz, 0dB attenuation  
880MHz, 0dB attenuation  
2140MHz, 0dB attenuation  
2700MHz, 0dB attenuation  
4000MHz, 0dB attenuation  
0.5dB step size  
dB  
dB  
dB  
dB  
Gain Control Range  
Step Accuracy  
Input IP3  
dB  
±(0.1 + 5% attenuation range)  
dB  
48  
dBm  
dBm  
dBm  
dBm  
dBm  
dBm  
dBm  
Input P0.5dB  
20  
Under 100MHz, all states  
1000MHz, all states  
Under 2700MHz  
27  
13  
Input Return Loss  
Output Return Loss  
10  
2700MHz to 4000MHz  
Under 2700MHz  
13  
11  
2700MHz to 4000MHz  
Serial interface  
Control Interface  
Settling Time  
6-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  
)
2.8  
3.0  
5.0  
3.3  
DD  
mA  
V
Control Voltage (V  
)
Low, V = 0 to 0.8V  
CTL  
CTL  
High, V = 2.0 to V  
V
CTL  
DD  
Notes:  
1. V = 3V, V = 3V, T = 25°C  
DD  
CTL  
2. IIP3 measured with P = 17dBm/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.  
DS120706  
3 of 12  
RFSA2644  
Typical Performance at 5V VDD - Broadband Application Circuit  
Insertion Loss versus Frequency  
Normalized Attenuation versus Frequency  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
0
-5  
-10  
-15  
-20  
-25  
-30  
-35  
0.5  
4
1
8
2
16  
-40°C  
25°C  
85°C  
31.5  
0
1,000  
2,000  
3,000  
4,000  
4000  
4000  
0
1000  
2000  
3000  
4000  
4000  
4000  
Frequency (MHz)  
Frequency (MHz)  
Input Return Loss versus Frequency  
Output Return Loss versus Frequency  
45  
40  
35  
30  
25  
20  
15  
10  
5
50  
45  
40  
35  
30  
25  
20  
15  
10  
5
0dB  
0.5dB  
4dB  
1dB  
8dB  
0dB  
0.5dB  
4dB  
1dB  
8dB  
2dB  
2dB  
16dB  
31.5dB  
16dB  
31.5dB  
0
0
0
1000  
2000  
3000  
0
1000  
2000  
3000  
Frequency (MHz)  
Frequency (MHz)  
Relative Phase versus Frequency  
Worst Case Step Error Between  
Successive States  
60  
50  
40  
30  
20  
10  
0
1.00  
0.75  
0.50  
0.25  
0.00  
-0.25  
-0.50  
-0.75  
-1.00  
0.5dB  
2dB  
1dB  
4dB  
8dB  
16dB  
31.5dB  
-10  
0
1000  
2000  
3000  
0
1000  
2000  
3000  
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 12  
DS120706  
RFSA2644  
Typical Performance at 5V VDD - 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  
50MHz  
1000MHz  
3000MHz  
400MHz  
2000MHz  
4000MHz  
0.5dB  
4dB  
1dB  
8dB  
2dB  
16dB  
0.6  
31.5dB  
0.4  
0.2  
0.0  
-0.2  
-0.4  
-0.6  
-0.8  
-1.0  
0
1000  
2000  
3000  
4000  
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  
0.5dB  
4dB  
1dB  
8dB  
2dB  
0dB  
0.5dB  
4dB  
1dB  
8dB  
16dB  
31.5dB  
2dB  
16dB  
31.5dB  
30  
0
500  
1000  
1500  
2000  
2500  
3000  
0
100  
200  
300  
400  
500  
600  
700  
800  
900  
1000  
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.  
DS120706  
5 of 12  
RFSA2644  
Serial Port Interface  
SPI Timing Diagram  
Programming Example - 6-Bit  
t6  
t1  
t2  
t3  
t8  
t4  
t7  
t5  
CLK  
DATA  
LE  
t9  
DOUT  
t10  
Truth Table  
Control Bit  
Relative Gain  
Setting  
C16  
1
C8  
C4  
1
C2  
1
C1  
C0.5  
1
1
1
1
1
0
1
0
1
1
0
1
1
1
1
0
1
0
1
1
1
1
1
0
Max gain  
-0.5dB  
-1dB  
1
1
1
1
1
1
1
1
0
-2dB  
1
0
1
-4dB  
1
1
1
-8dB  
0
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  
Low  
t2  
t3  
20  
20  
5
ns min  
ns min  
ns min  
ns min  
ns min  
ns min  
ns min  
ns min  
ns max  
CLK High  
CLK 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  
30  
5
PUP  
Low  
Attenuator Setting  
t7  
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.  
6 of 12  
DS120706  
RFSA2644  
Evaluation Board Schematic  
J99  
SMA  
J100  
SMA  
C19  
C20  
1
1
GND  
GND  
C4/CLK  
C4  
C1  
C3  
C2/LE  
P2  
1
2
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
C025  
C4/CLK  
C1  
GND  
C5  
GND  
P1  
3
C2  
C8/PUP  
VDD  
GND  
1
4
2
3
4
5
6
7
8
9
5
GND  
C05/DATA  
GND  
C1  
C025  
C05/DATA  
C05/DATA  
C1  
C2/LE  
C4/CLK  
C8/PUP  
C16  
6
C6  
C16  
7
GND  
C8/PUP  
C16  
8
GND  
GND  
9
C025  
10  
11  
12  
CON9  
C2/LE  
C9  
GND  
UM232R  
R7  
U1  
R8  
C7  
VDD  
C8  
1
18  
17  
16  
15  
14  
13  
C0.25  
VDD  
GND/NC  
GND/NC  
GND/NC  
RF2  
2
3
4
5
6
GND  
GND  
GND  
GND  
GND/NC  
RF1  
GND  
GND  
J2  
RF2  
C11  
C12  
J1  
RF1  
1
1
GND/NC  
NC  
GND/NC  
NC  
C18  
GND  
GND  
GND  
C13  
GND  
C15  
GND  
C14  
C17  
GND  
GND  
GND  
C16  
GND  
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical  
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.  
DS120706  
7 of 12  
RFSA2644  
Evaluation Board Bill of Materials (BOM)  
Description  
Reference  
Designator  
Manufacturer  
Manufacturer’s P/N  
RFSA2714410(A)  
Dynamic Details (DDI) Toronto  
RFMD  
SA2714410(A)  
RFSA2644SB  
50MHz to 4000MHz Serial 6-Bit DSA 0.5dB Step  
CAP, 1000pF, 10%, 50V, X7R, 0402  
CAP, 470pF, 10%, 50V, X7R, 0402  
CONN, SMA, END LNCH, UNIV, HYB MNT, FLT  
CONN, HDR, ST, PLRZD, 9-PIN  
CONN, SKT, 24-PIN DIP, .600", T/H  
MOD, USB TO SERIAL UART, SSOP-28  
RES, 0Ω, 0402  
U1  
C7  
C11-C12  
Taiyo Yuden (USA), Inc.  
Murata Electronics  
Molex  
RM UMK105BJ102KV-F  
GRM155R71H471KA01E  
SD-73251-4000  
MPSS100-9-C  
24-6518-10  
J1-J2, J99-J100  
P1  
ITW Pancon  
P2  
Aries Electronics Inc.  
Future Technology Devices Int'l  
Kamaya, Inc  
M1 (See Note Below)  
R1-R2, R4-R5, R8  
UM232R  
RMC1/16SJPTH  
NA  
DNP  
C1-C6, C8-C9, C13, C18-  
C20  
NA  
DNP  
R3, R6-R7  
NA  
NA  
Note: M1 is to 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.  
8 of 12  
DS120706  
RFSA2644  
Pin Names and Descriptions  
Pin  
1
2
3
4
Name  
GND  
VDD  
GND  
RF1  
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.  
5
6
7
8
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
RF2  
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.  
GND  
GND  
GND  
NC  
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.  
Serial Data.  
23  
24  
EPAD  
NC  
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.  
DS120706  
9 of 12  
RFSA2644  
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.  
10 of 12  
DS120706  
RFSA2644  
Package Outline Drawing  
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical  
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.  
DS120706  
11 of 12  
RFSA2644  
IO Pattern Label  
Branding Diagram  
Dimensions in millimeters  
Refer to drawing posted at www.rfmd.com for tolerances  
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical  
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.  
12 of 12  
DS120706  

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