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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. ©2006, 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 sales-support@rfmd.com.
Ordering Information
BiFET HBT
LDMOS
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 Bi t DS A
Logic Circuit
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
CG3
A
CG 4
A
CG5
N/C
C0.
5
C1
C2
C4
C8
C16
RFSA2614
PARALLEL CONTROLLED DIGITAL STEP
ATTENUATOR 50-4000MHz, 6-BIT, 0.5dB LSB
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>48dBm
700MHz to 2700MHz
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/WLAN
Wireless Data, Satellite
Terminals
Test Equipment
Prelim DS100928
Preliminary
Package: QFN, 24-Pin, 4mmx4mm
RFS A2614 Par-
allel Controlle d
Digital Step
Attenuator 50-
4000 MHz, 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 Preliminary
Prelim DS100928
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Absolute Maximum Ratings
Parameter Rating Unit
Supply Voltage 5.5 VDC
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
Parameter Specification Unit Condition
Min. Typ. Max.
Frequency Range 50 4000 MHz
Insertion Loss 1.4 dB 500MHz, 0dB attenuation
1.5 1.9 dB 850MHz, 0dB attenuation
1.9 dB 2140MHz, 0dB attenuation
2.0 2.8 dB 2700MHz, 0dB attenuation
2.3 dB 3800MHz, 0dB attenuation
Gain Control Range 31.5 dB 0.5dB step size
Step Accuracy ±(0.15+5.0% attenuation setting) dB
Input IP3 48 dBm 700MHz to 2700MHz, all states
Input P1dB >27 dBm 700 MHz to 2700MHz, all states
Return Loss >13 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.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
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.
3 of 9
RFSA2614
Preliminary
Prelim DS100928
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@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
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
Relative
Phase
(°)
Frequency (GHz)
Relative Phase, Major States
0.5dB 1dB
2dB 4dB
8dB 16dB
31.5dB
30
35
40
45
50
55
60
0.00 0.50 1.00 1.50 2.00 2.50 3.00
IIP3
(dBm)
Frequency (GHz)
Input IP3 versus Frequency, Major States
0.5dB 0dB
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
4 of 9
RFSA2614 Preliminary
Prelim DS100928
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@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)
Step Error versus Freq, All States (w/ACG caps)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0 4 8 12 16 20 24 28 32
Step
Error
(dB)
Attenuation State (dB)
Step Error versus Attenuation (w/ACG caps)
450 MHz 150 M Hz
850 MHz 1 GHz
2 GHz 2.7 G Hz
3.3 GHz 3.8 G Hz
-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 Freq, All States (no ACG caps)
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
0 4 8 12 16 20 24 28 32
Step
Error
(dB)
Attenuation State (dB)
Step Error versus Attenuation (no ACG caps)
850 MHz 1 GHz
2 GHz 2.7 G Hz
3.3 GHz 3.8 G Hz
5 of 9
RFSA2614
Preliminary
Prelim DS100928
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@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 Preliminary
Prelim DS100928
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Pin Function 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.
6ACG
AC ground connection for operation below 500MHz.
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 16 dB 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.
9 of 9
RFSA2614
Preliminary
Prelim DS100928
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Evaluation Board Bill of Materials
Package Drawing
Description Reference Designator Manufacturer Manufacturer's P/N
PCB RFSA26X4410(B)
CAP, 680 pF, 10%, 50V, X7R, 0402 C13, C15, C16, C17 Murata GRM155R71H681KA01E
CAP, 470pF, 10%, 50V, X7R, 0402 C11, C12, C19, C20 Murata GRM155R71H471KA01E
CAP, 1000pF, 10%, 50V, X7R, 0402 C7 Taiyo Yuden (USA), Inc. RM UMK105BJ102KV-F
RES, 33, 5%, 1/16W, 0402 R8 Kamaya, Inc RMC1/16S-330JTH
RES, 0, 0402 R1-R7 Kamaya, Inc RMC1/16SJPTH
DNI C1-C6, C8, C9, C14, C18
CONN, SMA, END LNCH, UNIV, HYB MNT, FLT J1, J2, J99, J100 Heilind Electronics PER MAT-21-1038
CONN, HDR, ST, PLRZD, 9-PIN P1 ITW Pancon MPSS100-9-C
RFSA2614SB U1 RFMD RFSA2614
4. 00 0±0 . 050
4 .0 00± 0.050
BY MARKING
PIN 1 DOT
PIN #1 IDENTIFIC ATION
CHAMFER 0.300 X 45°
0. 40 0±0 . 050
2. 70 0±0 .0 50
Exp.DAP
2 .7 00± 0.050
Exp.DAP
0.500 Bsc
0. 25 0±0 .0 50
0.000-.050
SA2614
TOP VIEW
YYWW
SIDE VIEW
2.500
Ref.
BOTTOM VIEW
.203 Ref.
.850±0.050
Trace Code
YYWW = Date Code, where YY=year, WW=week
Trace Code to be assigned by assembly SubCon
