RFSA2644 Datasheet PDF - RFMD


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RFSA2644
RFMD

Part Number RFSA2644
Description SERIAL CONTROLLED DIGITAL STEP ATTENUATOR
Page 12 Pages

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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 23 22 21 20 19
Features
Frequency Range 50MHz to
4000MHz
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
On-Chip ESD Protection Class 1C
HBM
Single Supply, 3V to 5V Operation
Footprint Compatible with Most
24-Pin, 4mm x 4mm, QFNs
Applications
Transceiver RF and IF
Applications
Cellular, PCS, GSM, UMTS, LTE,
WiMax/WiFi
Wireless Data, Satellite
Terminals
Test Equipment
GND 1
VDD 2
GND 3
RF1 4
GND 5
GND 6
7
SPI
6-Bit DSA
18 GND
17 GND
16 GND
15 RF2
14 GND
13 GND
8
9
10 11
12
Functional Block Diagram
Product Description
www.DataSheet.net/
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.
Ordering Information
RFSA2644SR
7” Sample reel with 100 pieces
RFSA2644SQ
25-Piece sample bag
RFSA2644TR7
7” Reel with 750 pieces
RFSA2644TR13 13” Reel with 2500 pieces
RFSA2644PCK-410 50MHz to 4000MHz PCBA with 5-piece sample bag
DS120706
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 customerservice@rfmd.com.
1 of 12
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RFSA2644
Absolute Maximum Ratings
Parameter
Supply Voltage
DC Supply Current
Power Dissipation
Max RF Input Power
Operating Temperature (TCASE)
Storage Temperature
Junction Temperature
ESD Rating (HBM)
Moisture Sensitivity Level
Rating
+5.5
15
83
28.3
-40 to +85
-40 to +150
150
Class 1C
MSL3
Unit
V
mA
mW
dBm
°C
°C
°C
V
Caution! ESD sensitive device.
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.
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.
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.
Parameter
Specification
Min. Typ. Max.
Frequency Range
50
4000
Insertion Loss
0.6
0.7
0.8
1.2
1.4
1.8
Gain Control Range
31.5
Step Accuracy
Input IP3
±(0.1+5% attenuation range)
48 55
www.DataSheet.net/
Input P0.5dB
20 20.2
28 30
Input Return Loss
13 29
10 18
Output Return Loss
13 27
11.5
22
Control Interface
6-Bit, Serial
Settling Time
200
Switching Speed
200
Supply Voltage (VDD)
Supply Current
4.75 5.0 5.25
5.2
Control Voltage (VCTL)
Low, VCTL = 0 to 0.8V
High, VCTL = 2.0 to VDD
Notes:
1. VDD = 5V, VCTL = 5V, T = 25°C
2. IIP3 measured with PIN = 17dBm/tone, 1MHz spacing
Unit
MHz
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
dBm
nS
nS
V
mA
V
V
Condition
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
Under 100MHz, all states
150MHz to 1000MHz, all states
Under 2700MHz
2700MHz to 4000MHz
Under 2700MHz
2700MHz to 4000MHz
Serial interface
tRISE, tFALL (10%/90% RF)
tON, tOFF (50% CTL to 10%/90% RF)
2 of 12
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS120706
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RFSA2644
Parameter
Specification
Min. Typ. Max.
Frequency Range
50
4000
Insertion Loss
0.7
0.7
1.0
1.2
1.5
1.8
Gain Control Range
31.5
Step Accuracy
±(0.1 + 5% attenuation range)
Input IP3
48
Input P0.5dB
20
27
Input Return Loss
13
10
Output Return Loss
13
11
Control Interface
6-Bit, Serial
Settling Time
200
Switching Speed
200
Supply Voltage (VDD)
Supply Current
2.8 3.0 3.3
5.0
Control Voltage (VCTL)
Low, VCTL = 0 to 0.8V
High, VCTL = 2.0 to VDD
Notes:
1. VDD = 3V, VCTL = 3V, T = 25°C
2. IIP3 measured with PIN = 17dBm/tone, 1MHz spacing
www.DataSheet.net/
Unit
MHz
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
dBm
nS
nS
V
mA
V
V
Condition
3V, 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
Under 100MHz, all states
1000MHz, all states
Under 2700MHz
2700MHz to 4000MHz
Under 2700MHz
2700MHz to 4000MHz
Serial interface
tRISE, tFALL (10%/90% RF)
tON, tOFF (50% CTL to 10%/90% RF)
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
3 of 12
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RFSA2644
Typical Performance at 5V VDD - Broadband Application Circuit
Insertion Loss versus Frequency
2.5
2.0
1.5
1.0
0.5
0.0
0
-40°C
25°C
85°C
1,000
2,000
Frequency (MHz)
3,000
4,000
Input Return Loss versus Frequency
45
40
35
30
25
20
15
10
5
0
0
0dB
2dB
16dB
0.5dB
4dB
31.5dB
1dB
8dB
1000
2000
Frequency (MHz)
3000
4000
60
50
40
30
20
10
0
-10
0
Relative Phase versus Frequency
0.5dB
2dB
8dB
31.5dB
1dB
4dB
16dB
1000
2000
Frequency (MHz)
3000
4000
Normalized Attenuation versus Frequency
0
-5
-10
-15
-20
0.5 1
2
-25 4 8 16
31.5
-30
-35
0
1000
2000
Frequency (MHz)
3000
4000
Output Return Loss versus Frequency
50
45
40
35
www.DataSheet.net/
30
25
20
15
0dB
0.5dB
1dB
10
2dB 4dB 8dB
5
16dB
31.5dB
0
0
1000
2000
3000
Frequency (MHz)
4000
1.00
0.75
0.50
0.25
0.00
-0.25
-0.50
-0.75
-1.00
0
Worst Case Step Error Between
Successive States
1000
2000
Frequency (MHz)
3000
4000
4 of 12
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
DS120706
Datasheet pdf - http://www.DataSheet4U.co.kr/




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