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Optimum Technology Matching® Applied
GaAs HBT
InGaP HBT
GaAs MESFET
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
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 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Ordering Information
BiFET HBT
1
2
3
4
5
6
18
17
16
15
14
13
7 8 9 10 11 12
24 23 22 21 20 19
6 Bit DS A
Logic Ci rc ui t
N/C
Vcc
N/C
RF1
N/C
N/C
N/C
N/C
N/C
RF2
N/C
ACG6
A
CG1
A
CG2
A
CG
3
A
CG
4
A
CG
5
N/C
C0.
5
C1
C2
C4
C8
C16
RFSA2614
PARALLEL CONTROLLED DIGITAL STEP
ATTENUATOR 50MHz TO 4000MHz, 6-BIT, 0.5dB
The RFSA2614 is a 6-bit digital step attenuator (DSA) that features high linearity
over the entire 31.5dB gain control range with excellent step accuracy in 0.5dB
steps. The parallel-controlled RFSA2614 has an on-chip decoder that is both 3V
and 5V compatible. It also offers a rugged Class 1B HBM ESD rating via on-chip
ESD circuitry.
Features
Frequency Range 50MHz to
4000MHz
6 Bits, 31.5dB Range, 0.5dB
Step
High Linearity, IIP3 >49dBm
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 RF and IF
Applications
Cellular, PCS, GSM, UMTS, LTE,
WiMax/WiFi
Wireless Data, Satellite
Terminals
Test Equipment
DS120706
Package: QFN, 24-Pin, 4mm x 4mm
RFSA2614Par-
allel Controlled
Digital Step
Attenuator
50MHz to
4000MHz, 6-
Bit, 0.5dB LSB
RFSA2614SR 7” Reel with 100 pieces
RFSA2614SQ Sample bag with 25 pieces
RFSA2614TR7 7” Reel with 750 pieces
RFSA2614TR13 13” Reel with 2500 pieces
RFSA2614PCK-410 50MHz to 4000MHz PCBA with 5-piece sample bag
2 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Absolute Maximum Ratings
Parameter Rating Unit
Supply Voltage 5.5 VDC
DC Supply Current 15 mA
DC 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
Parameter Specification Unit Condition
Min. Typ. Max.
Frequency Range 50 4000 MHz
Insertion Loss 1.6 1.9 dB 500MHz, 0dB attenuation
1.7 dB 850MHz, 0dB attenuation
2.1 dB 2140MHz, 0dB attenuation
2.2 2.8 dB 2700MHz, 0dB attenuation
2.8 dB 3800MHz, 0dB attenuation
Gain Control Range 31.5 dB 0.5dB step size
Step Accuracy ±(0.15 + 5.0% attenuation setting) dB
IIP3 >49 dBm 700MHz to 2700MHz, states 0 thru 27.5dB
IIP3 >45 dBm 700MHz to 2700MHz, states 28 thru 31.5dB
Input P1dB >27 dBm 700MHz to 2700MHz, all states
Return Loss >18 dB 700MHz to 2700MHz, all states
Control Interface 6 bit 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) 3.0 5.0 5.25 V Typical performance based on 5V opreation.
Supply Current 3.5 mA
Control Voltage (VCTL)0 0.8VLow
2.0 VDD VHigh
Notes:
1. VDD = 5V, VCTL = 3V, T = 25°C
2. Broadband Application Circuit (with ACG capacitors)
3. IIP3 measured with 1MHz spacing, PIN = 4dBm/tone for frequency < 300MHz, PIN = 10dBm/tone for frequency > 300MHz
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.
3 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Typical Broadband Application Circuit Performance
(with ACG capacitors)
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
S21 (dB)
Frequency (GHz)
Gain versus Frequency, Reference State (0dB)
85C
25C
-40C
-35.0
-30.0
-25.0
-20.0
-15.0
-10.0
-5.0
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
S21 (dB)
Frequency (GHz)
Normalized Attenuation, Major States
0.5dB
1dB
2dB
4dB
8dB
16dB
31.5dB
-30
-25
-20
-15
-10
-5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
S22 (dB)
Frequency (GHz)
RF2 RL versus Frequency, Major States
0dB
0.5dB
1dB
2dB
4dB
8dB
16dB
31.5dB
-30
-25
-20
-15
-10
-5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
S11 (dB)
Frequency (GHz)
RF1 RL versus Frequency, Major States
0dB
0.5dB
1dB
2dB
4dB
8dB
16dB
31.5dB
-20
-10
0
10
20
30
40
50
60
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
S21 (dB)
Frequency (GHz)
Relative Phase, Major States
0.5dB
1dB
2dB
4dB
8dB
16dB
31.5dB
35
40
45
50
55
60
0.0 0.5 1.0 1.5 2.0 2.5 3.0
IIP3 (dBm)
Frequency (GHz)
Input IP3 versus Frequency, All States, 25C
States 28 thru 31.5dB
4 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Typical Broadband Application Circuit Performance
(with and without ACG capacitors)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Step Error (dB)
Frequency (GHz)
Worst Case Step Error between Successive States
(w/ACG caps)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Step Error (dB)
Frequency (GHz)
Worst Case Step Error between Successive States
(no ACG caps)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Step Error (dB)
Frequency (GHz)
Step Error versus Frequency, All States (w/ACG caps)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Step Error (dB)
Frequency (GHz)
Step Error versus Frequency, All States (no ACG caps)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
048121620242832
Step Error (dB)
Attenuation State (dB)
Step Error versus Attenuation (w/ACG caps)
450 MHz
150 MHz
850 MHz
1 GHz
2 GHz
2.7 GHz
3.3 GHz
3.8 GHz
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
048121620242832
Step Error (dB)
Attenuation State (dB)
Step Error versus Attenuation (no ACG caps)
850 MHz
1 GHz
2 GHz
2.7 GHz
3.3 GHz
3.8 GHz
5 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Truth Table
Control Bit Relative
Gain
Setting
C16C8C4C2C1C0.5
111111Max gain
111110-0.5dB
111101-1dB
111011-2dB
110111-4dB
101111-8dB
011111-16dB
000000-31.5dB
Logic Voltage Levels
State Logic
Low 0V to 0.8V
High 2.0V to 5.0V
6 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Pin Names and Descriptions
Pin Name Description
1NC
No internal connection. EVB can be ground or no connect.
2VDD
Power supply.
3NC
No internal connection. EVB can be ground or no connect.
4RF1
RF port. External DC block required.
5NC
No internal connection. EVB can be ground or no connect.
6NC
No internal connection. EVB can be ground or no connect.
7ACG
AC ground connection for operation below 500MHz.
8ACG
AC ground connection for operation below 500MHz.
9ACG
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 ACG AC ground connection for operation below 500MHz.
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 D5 16dB control bit.
20 D4 8dB control bit.
21 D3 4dB control bit.
22 D2 2dB control bit.
23 D1 1dB control bit.
24 D0 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.
7 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Evaluation Board Assembly Drawing
6
8 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Evaluation Board Schematic
(with ACG capacitors)
C0.25
1
VDD
2
GND/NC
3
RF1
4
GND/NC
5
NC
6
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 24
U1
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
VDD
GND
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
1
2
3
4
5
6
7
8
9
P1
CON9
R8
C8
GND
1
2
J1
RF1
1
2
J2
RF2
1
2
J99
SMA
1
2
J100
SMA
CB2
12
TXD
1
DTR#
2
RTS#
3
VIO
4
RXD
5
RI#
6
GND
7
DSR#
8
DCD#
9
CTS#
10
CB4
11
GND 24
SLD 13
USB 14
VCC 15
PU2 16
PU1 17
CB3 18
3V3 19
RST 20
VCC 21
CB1 22
CB0 23
P2
UM232R
C025
C4/CLK
C1
C05/DATA
GND
C8/PUP
C16
C2/LE
9 of 9
RFSA2614
DS120706
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.
Evaluation Board Bill of Materials
Package Drawing
Description Reference Designator Manufacturer Manufacturer's P/N
RFSA2714 Evaluation Board PCB itself Dynamic Details (DDI)
Toronto
SA2714410(A)
6-Bit SA Parallel 0.5dB QFN 4x4 U1 RFMD RFSA2614SB
CAP, 680pF, 10%, 50V, X7R, 0402 C13, C15-C17 Murata Electronics N.
America
GRM155R71H681KA01E
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
RES, 0Ω, 0402 R1-R6, 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, C14, C18-C20, R7 NA NA
Note: M1 should be mounted into P2 with respect to the Pin 1 alignment of M1 and P2
4.000±0.050
4.000±0.050
BY MARKI NG
PI N 1 DO T
PI N #1 I DENTIF ICATI O N
CHA M FE R 0.300 X 45°
0.400±0 .050
2.700±0.050
Exp.DAP
2.700±0.050
Exp.DAP
0.500 Bs c
0.250±0 .050
0.000-.050
SA2614
TOP VIEW
YYWW
SIDE VI EW
2.500
Ref.
BOT TO M VIEW
.203 Ref.
.850±0.050
Tr ace C ode
YYWW = Date Code, w here YY=year , WW=week
T r ace Co de to be ass i gne d b y ass e mb ly Sub Co n
