RFSA2714
RFSA2714Parallel Controlled
Digital Step
Attenuator,
50MHz to
4000MHz
Parallel Controlled Digital Step Attenuator,
50MHz to 4000MHz
C1
C2
C4
C8
C16
20
19
16
N/C
15
RF2
5
14
N/C
6
13
N/C
High Linearity, IP3 >50dBm
N/C
3V and 5V Logic Compatible
N/C
On-chip Parallel Decoder
Parallel Programming Interface
On-chip ESD Protection >500V
HBM
Single Supply, 3V to 5V Operation
7 Bit DSA
ACG1
7
8
9
10
11
12
N/C
4
ACG5
RF1
ACG4
7-Bit, 31.75dB Range, 0.25dB
Step
ACG3
3
Logic Circuit
ACG2
N/C
Applications
21
N/C
2
22
17
VDD
Frequency Range 50MHz to
4000MHz
23
N/C
1
24
18
C0.25
Features
C0.5
Package: QFN, 24-Pin, 4.2mm x 4.2mm
Functional Block Diagram
Product Description
Transceiver IF Applications
Cellular, PCS, GSM, UMTS, LTE,
WiMax/WiFi
Wireless Data, Satellite
Terminals
Test Equipment
RFMD's RFSA2714 is a 7-bit digital step attenuator (DSA) that features high linearity
over the entire 31.75dB gain control range with excellent step accuracy in 0.25dB
steps. The parallel-controlled RFSA2714 has an on-chip decoder that is both 3V and
5V compatible. The RFSA2714 also offers a rugged Class 1B HBM ESD rating via
on-chip ESD circuitry.
Ordering Information
RFSA2714SR
RFSA2714SQ
RFSA2714TR13
RFSA2714PCK-410
7” Sample reel with 100 pieces
Sample bag with 25 pieces
13” Reel with 2500 pieces
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 trademark 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.
DS130211
7628 Thorndike Road, Greensboro, NC 21127409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or customerser-
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RFSA2714
Absolute Maximum Ratings
Parameter
Rating
Supply Voltage
Unit
+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)
Frequency Range
MSL1
Min.
Specification
Typ.
50
Insertion Loss
Max.
4000
Unit
Condition
MHz
0.85
dB
150MHz, 0dB attenuation
1.1
dB
850MHz, 0dB attenuation
1.7
dB
2700MHz, 0dB attenuation
2.1
dB
3800MHz, 0dB attenuation
31.75
dB
0.25dB step size
±(0.1 + 5% attenuation setting)
dB
Gain Control Range
Step Accuracy
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 application circuitry and specifications at any time without prior notice.
Class 1B
Moisture Sensitivity Level
Parameter
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 performance or functional operation of the device under Absolute Maximum Rating conditions is not implied.
Input IP3
50
dBm
100MHz to 4000MHz
Input P0.1dB
25
dBm
1000MHz
15
dB
Return Loss
Control Interface
7-bit, Parallel
DC to 3000MHz, all states
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)
Supply Current
Control Voltage (VCTL)
4.75
5.0
5.25
V
7.5
mA
Low, VCTL = 0 to 0.8
High, 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.
2 of 9
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
DS130211
RFSA2714
Typical Performance: Broadband Application Circuit (25°C)
DS130211
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
3 of 9
RFSA2714
Typical Performance: Broadband Application Circuit (25°C)
4 of 9
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
DS130211
RFSA2714
Truth Table
Control Bit
C16
C8
C4
C2
C1
C0.5
C0.25
Relative Gain
Setting
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 Levels
DS130211
State
Logic
Low
0V to 0.8V
High
2.0V to 5.0V
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 9
RFSA2714
Pin Names and Description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
EPAD
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Name
C0.25
VDD
NC
RF1
NC
NC
ACG
ACG
ACG
ACG
ACG
NC
NC
NC
RF2
NC
NC
NC
C16
C8
C4
C2
C1
C0.5
GND
Description
0.25dB Control Bit.
Power Supply.
No Internal Connection. EVB can be ground or no connect.
RF Port. External DC Block Required.
No Internal Connection. EVB can be ground or no connect.
No Internal Connection. EVB can be ground or no connect.
AC Ground Connection for Operation below 500MHz.
AC Ground Connection for Operation below 500MHz.
AC Ground Connection for Operation below 500MHz.
AC Ground Connection for Operation below 500MHz.
AC Ground Connection for Operation below 500MHz.
No Internal Connection. EVB can be ground or no connect.
No Internal Connection. EVB can be ground or no connect.
No Internal Connection. EVB can be ground or no connect.
RF Port. External DC Block Required.
No Internal Connection. EVB can be ground or no connect.
No Internal Connection. EVB can be ground or no connect.
No Internal Connection. EVB can be ground or no connect.
16dB Control Bit.
8dB Control Bit.
4dB Control Bit.
2dB Control Bit.
1dB Control Bit.
0.5dB Control Bit.
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 [email protected].
DS130211
RFSA2714
C8
R8 U1
R3
C2/LE
C16
C8/PUP
C4/CLK
C1
R1
C3 C2
R2
C16
C8/PUP
C2/LE
C1
R6
R5
C7
C5 C4
J2
RF2
C12
C13
C11
C17
C14
C16
C15
C18
Trace width should be 17.25mils
Board Edge
C6
Board Edge
Trace width should be 17.25mils
R7
C9
J1
RF1
GND
C05/DATA
C1
C4/CLK
C025
P2
R4
C025
C05/DATA
P1
GND
VDD
Evaluation Board Assembly Drawing
SA2714410(A)
J100
Board Edge
C20
Board Edge
DS130211
C19
Trace width should be 17.25mils
Trace width should be 17.25mils
J99
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
7 of 9
RFSA2714
Evaluation Board Schematic
C19
J100
SMA
C20
1
2
1
2
J99
SMA
GND
GND
C4/CLK
C4 C2/LE
C3
GND
C5
C025
GND
P1
C8/PUP C2
C1
GND
VDD
GND
C025
C05/DATA
C1
C2/LE
C4/CLK
C8/PUP
C16
GND
C05/DATA
C6
C16 C1
R3
R2
R1
R5
R4
GND
R6
GND
C025
C4/CLK
C1
1
2
3
4
5
6
7
8
9
C05/DATA
GND
C8/PUP
C16
CON9
C9
C2/LE
1
2
3
4
5
6
7
8
9
10
11
GND
19
GND/NC
GND/NC
7
GND
GND
C17
CB1
VIO
VCC
RXD
RST
RI#
3V3
GND
CB3
DSR#
PU1
DCD#
PU2
CTS#
VCC
CB4
USB
CB2
SLD
23
22
21
20
19
18
17
16
15
14
13
NC
18
17
16
GND
C12
1
15
14
GND
13
J2
RF2
GND
C13
GND
C14
RTS#
24
2
RF2
NC
CB0
C16
20
C8
21
C4
22
C2
23
RF1
GND/NC
6
GND
DTR#
12
5
GND/NC
GND/NC
GND
C18
GND/NC
11
2
4
GND/NC
GND/NC
1
VDD
10
GND
C11
J1
RF1
3
GND/NC
GND/NC
GND
TXD
UM232R
C0.25
9
2
C1
C0.5
1
GND/NC
GND
C7
8
C8
U1
GND/NC
R7
R8
VDD
24
12
GND
P2
GND
C15
GND
GND
C16
GND
Evaluation Board Bill of Materials (BOM)
Description
Reference Designator
SA2714410(A)
Digital Step Attenuator 50MHz to 4000MHz
CAP, 1000pF, 10%, 50V, X7R, 0402
Manufacturer
Manufacturer’s P/N
Dynamic Details (DDI) Toronto
SA2714410(A)
U1
RFMD
RFSA2714SB
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
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
DNP
R1-R8
Kamaya, Inc
RMC1/16SJPTH
J1-J2, J99-J100
Molex
SD-73251-4000
P1
ITW Pancon
MPSS100-9-C
P2
Aries Electronics Inc.
24-6518-10
M1 (See Note Below)
Future Technology Devices Int'l
UM232R
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
8 of 9
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
DS130211
RFSA2714
Branding Drawing
4.000
SA2714
YYWW
Trace
4.000
Pin 1 Indicator
Fill in the YYWW Notation with the Date Code
YY = Year
WW = Week
Trace to be assigned by SubCon
Package Drawing
DS130211
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
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