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Functional Block Diagram
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.
Product Description
7628 Thorndike Road, Greensboro, NC 21127409-9421 · For sales or techni-cal support, contact RFMD at ((+1) 336-678-5570 or ccustomerser-
Ordering Information
1
2
3
4
5
6
18
17
16
15
14
13
7 8 9 10 11 12
24 23 22 21 20 19
7 Bit DSA
Logic Circuit
C0.25
VDD
N/C
RF1
N/C
N/C
N/C
N/C
N/C
RF2
N/C
N/C
ACG1
ACG2
ACG3
ACG4
ACG5
N/C
C0.5
C1
C2
C4
C8
C16
RFSA2714Parallel Controlled Digital Step Attenuator,
50MHz to 4000MHz
RFMD's RFSA2714 is a 7-bit digital step attenuator (DSA) that features high linearityover the entire 31.75dB gain control range with excellent step accuracy in 0.25dBsteps. The parallel-controlled RFSA2714 has an on-chip decoder that is both 3V and5V compatible. The RFSA2714 also offers a rugged Class 1B HBM ESD rating viaon-chip ESD circuitry.
Features� Frequency Range 50MHz to
4000MHz
� 7-Bit, 31.75dB Range, 0.25dB Step
� High Linearity, IP3 >50dBm
� 3V and 5V Logic Compatible
� On-chip Parallel Decoder
� Parallel Programming Interface
� On-chip ESD Protection >500V HBM
� Single Supply, 3V to 5V Operation
Applications� Transceiver IF Applications
� Cellular, PCS, GSM, UMTS, LTE,
� WiMax/WiFi
� Wireless Data, Satellite Terminals
� Test Equipment
DS130211
Package: QFN, 24-Pin, 4.2mm x 4.2mm
RFSA2714Par-allel Controlled Digital Step Attenuator, 50MHz to 4000MHz
RFSA2714SR 7” Sample reel with 100 piecesRFSA2714SQ Sample bag with 25 piecesRFSA2714TR13 13” Reel with 2500 piecesRFSA2714PCK-410 50MHz to 4GHz PCBA with 5-piece sample bag
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RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Absolute Maximum Ratings
Parameter Rating UnitSupply Voltage +5.5 V
DC Supply Current 15 mA
Power Dissipation 83 mW
Max RF Input Power 27 dBm
Operating Temperature (TCASE) -40 to +85 °C
Storage Temperature -40 to +150 °C
Junction Temperature 150 °C
ESD Rating (HBM) Class 1B
Moisture Sensitivity Level MSL1
ParameterSpecification
Unit ConditionMin. Typ. Max.
Frequency Range 50 4000 MHz
Insertion Loss 0.85 dB 150MHz, 0dB attenuation
1.1 dB 850MHz, 0dB attenuation
1.7 dB 2700MHz, 0dB attenuation
2.1 dB 3800MHz, 0dB attenuation
Gain Control Range 31.75 dB 0.25dB step size
Step Accuracy ±(0.1 + 5% attenuation setting) dB
Input IP3 50 dBm 100MHz to 4000MHz
Input P0.1dB 25 dBm 1000MHz
Return Loss 15 dB DC to 3000MHz, all states
Control Interface 7-bit, Parallel Parallel Interface
Settling Time 200 ns tRISE, tFALL (10%/90% RF)
Switching Speed 200 ns tON, tOFF (50% CTL to 10%/90% RF)
Supply Voltage (VDD) 4.75 5.0 5.25 V
Supply Current 7.5 mA
Control Voltage (VCTL) Low, VCTL = 0 to 0.8High, VCTL = 2.0 to VDD
V
Notes:1. VDD = 5V, VCTL= 5V, T = 25°C.2. Broadband Application Circuit (with ACG caps).3. IIP3 measured with PIN = +10dBm/tone, 1MHz spacing.
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.
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RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Typical Performance: Broadband Application Circuit (25°C)
4 of 9
RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Typical Performance: Broadband Application Circuit (25°C)
5 of 9
RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Truth Table
Control Bit Relative Gain SettingC16 C8 C4 C2 C1 C0.5 C0.25
1 1 1 1 1 1 1 Max gain
1 1 1 1 1 1 0 -0.25dB
1 1 1 1 1 0 1 -0.5dB
1 1 1 1 0 1 1 -1dB
1 1 1 0 1 1 1 -2dB
1 1 0 1 1 1 1 -4dB
1 0 1 1 1 1 1 -8dB
0 1 1 1 1 1 1 -16dB
0 0 0 0 0 0 0 -31.75dB
Note: C0.25 = D0, C0.5 = D1, …, C16 = D6 (for the purpose of the example below)
Logic Voltage LevelsState Logic
Low 0V to 0.8V
High 2.0V to 5.0V
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RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Pin Names and DescriptionPin Name Description1 C0.25 0.25dB Control Bit.
2 VDD Power Supply.
3 NC No Internal Connection. EVB can be ground or no connect.
4 RF1 RF Port. External DC Block Required.
5 NC No Internal Connection. EVB can be ground or no connect.
6 NC No Internal Connection. EVB can be ground or no connect.
7 ACG AC Ground Connection for Operation below 500MHz.
8 ACG AC Ground Connection for Operation below 500MHz.
9 ACG AC Ground Connection for Operation below 500MHz.
10 ACG AC Ground Connection for Operation below 500MHz.
11 ACG AC Ground Connection for Operation below 500MHz.
12 NC No Internal Connection. EVB can be ground or no connect.
13 NC No Internal Connection. EVB can be ground or no connect.
14 NC No Internal Connection. EVB can be ground or no connect.
15 RF2 RF Port. External DC Block Required.
16 NC No Internal Connection. EVB can be ground or no connect.
17 NC No Internal Connection. EVB can be ground or no connect.
18 NC No Internal Connection. EVB can be ground or no connect.
19 C16 16dB Control Bit.
20 C8 8dB Control Bit.
21 C4 4dB Control Bit.
22 C2 2dB Control Bit.
23 C1 1dB Control Bit.
24 C0.5 0.5dB Control Bit.
EPAD GND DC and RF Ground. Must be soldered to EVB ground plane over a bed of vias for thermal and RF performance.
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RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Evaluation Board Assembly Drawing
Board Edge
Trace width should be 17.25mils
Board Edge
Trace width should be 17.25mils
Board Edge
Trace width should be 17.25mils
Trace width should be 17.25mils
Board Edge
C025
SA2714410(A)
VDD
GND
C05/DATA C1
C2/LE
C4/CLK
C8/PUP
C16
C025
C4/CLK C1
C05/DATA
GND
C8/PUP
C16
C2/LE
J1RF1
J100J99
C20C19
R8
C11
J2RF2
C1C2C3C4C5C6C7
C9
C12C13
C14
C15
C16
U1
C17
C18R1
R2
R3
R4
R5
R6R7
C8
P2
P1
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RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
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 U1 RFMD RFSA2714SB
CAP, 1000pF, 10%, 50V, X7R, 0402 C7 Taiyo Yuden (USA), Inc. RM UMK105BJ102KV-F
CAP, 470pF, 10%, 50V, X7R, 0402 C11-C12 Murata Electronics GRM155R71H471KA01E
CAP, 680pF, 5%, 50V, C0G, 0402 C14, C15, C16 Murata Electronics GRM1555C1H681JA01D
RES, 0�, 0402 R1-R8 Kamaya, Inc RMC1/16SJPTH
CONN, SMA, END LNCH, UNIV, HYB MNT, FLT J1-J2, J99-J100 Molex SD-73251-4000
CONN, HDR, ST, PLRZD, 9-PIN P1 ITW Pancon MPSS100-9-C
CONN, SKT, 24-PIN DIP, .600", T/H P2 Aries Electronics Inc. 24-6518-10
MOD, USB TO SERIAL UART, SSOP-28 M1 (See Note Below) Future Technology Devices Int'l UM232R
DNP C1-C6, C8-C9, C13, C17-C20 NA NA
Note: M1 should be mounted into P2 with respect to the Pin 1 alignment of M1 and P2
C0.251
VDD2
GND/NC3
RF14
GND/NC5
NC6
GND/NC
7
GND/NC
8
GND/NC
9
GND/NC
10
GND/NC
11
GND/NC
12
NC 13
GND/NC 14
RF2 15
GND/NC 16
GND/NC 17
GND/NC 18
C16
19
C8
20
C4
21
C2
22
C1
23
C0.5
24U1
C7
C6
C5
C4 C3
C2
C1
GND
GND
GND
GND GND
GND
GND
C05/DATA C05/DATA
C1
C1
C2/LE
C2/LE
C4/CLK
C4/CLK
C8/PUP
C8/PUP
C16
C16
VDD
VDDGND
C13
GND
C15
GND
C16
GND
C14
GND
GND
GND GND
GND
GND
C11 C12
GND GND
GND GND
C17
GND
C18
GND
C19 C20
C025
C9
GND
C025
R3
R2
R1
R4
R6
R7
R5
123456789
P1
CON9
R8
C8
GND
1
2
J1RF1 1
2
J2RF2
1
2
J99SMA 1
2
J100SMA
CB212
TXD1
DTR#2
RTS#3
VIO4
RXD5
RI#6
GND7
DSR#8
DCD#9
CTS#10
CB411
GND 24
SLD 13USB 14VCC 15PU2 16PU1 17CB3 183V3 19RST 20VCC 21CB1 22CB0 23
P2
UM232R
C025
C4/CLK
C1
C05/DATA
GND
C8/PUP
C16
C2/LE
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RFSA2714
DS1302117628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at ((+1) 336-678-5570 or [email protected].
Branding Drawing
Package Drawing
SA2714 YYWW Trace
Pin 1 Indicator
Fill in the YYWW Notation with the Date Code
YY = Year
WW = Week
Trace to be assigned by SubCon
4.0004.000
4.0004.000
Mouser Electronics
Authorized Distributor
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