RFSA2614Parallel Controlled Digital Step Attenuator 504000 MHz, 6Bit, 0.5 dB LSB
RFSA2614
PARALLEL CONTROLLED DIGITAL STEP ATTENUATOR 50-4000MHz, 6-BIT, 0.5dB LSB
Package: QFN, 24-Pin, 4mmx4mm
C0.5
C1
C4
24
23
22
21
C8
20
C2
Features
N/C Vcc N/C RF1 N/C N/C
1 2 3 4 5 6
C16
19
18
N/C N/C N/C RF2 N/C ACG6
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
Logi c Cir cuit
17 16 15 14 13
6 Bit DSA
7
8
9
10
11
12
A CG4
ACG3
A CG5
ACG1
Functional Block Diagram
Applications
Product Description
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.
Transceiver RF and IF Applications Cellular, PCS, GSM, UMTS, LTE, WiMax/WLAN Wireless Data, Satellite Terminals Test Equipment
Ordering Information
RFSA2614SR RFSA2614SQ RFSA2614TR7 RFSA2614TR13 RFSA2614PCK-410 7” reel with 100 pieces Sample bag with 25 pieces 7” reel with 750 pieces 13” reel with 2500 pieces 50MHz to 4000MHz PCBA with 5-piece sample bag
Optimum Technology Matching® Applied
GaAs HBT GaAs MESFET InGaP HBT SiGe BiCMOS Si BiCMOS SiGe HBT
ACG2
GaAs pHEMT
Si CMOS Si BJT
N/C
GaN HEMT BiFET HBT LDMOS
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. ©2006, RF Micro Devices, Inc.
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RFSA2614
Absolute Maximum Ratings Parameter
Supply Voltage DC Supply Current DC Power Dissipation Max RF Input Power Operating Temperature (TCASE) Storage Temperature Junction Temperature ESD Rating (HBM) Moisture Sensitivity Level
Rating
5.5 15 83 27 -40 to +85 -40 to +150 150 Class 1B MSL1
Unit
VDC mA mW dBm °C °C °C
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. 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 application circuitry and specifications at any time without prior notice.
Parameter
Frequency Range Insertion Loss
Min.
50
Specification Typ.
1.6 1.7 2.1 2.2 2.8
Max.
4000 1.9
Unit
MHz dB dB dB
Condition
500MHz, 0dB attenuation 850MHz, 0dB attenuation 2140MHz, 0dB attenuation 2700MHz, 0dB attenuation 3800MHz, 0dB attenuation 0.5dB step size 700MHz to 2700MHz, states 0 thru 27.5dB 700MHz to 2700MHz, states 28 thru 31.5dB 700MHz to 2700MHz, all states 700MHz to 2700MHz, all states Parallel interface tRISE, tFALL (10%/90% RF) tON, tOFF (50% CTL to 10%/90% RF) Typical performance based on 5V opreation. Low High
2.8
dB dB dB dB dBm dBm dBm dB bit nS nS
Gain Control Range Step Accuracy IIP3 IIP3 Input P1dB Return Loss Control Interface Settling Time Switching Speed Supply Voltage (VDD) Supply Current Control Voltage (VCTL) 0 2.0 3.0
31.5 ±(0.15+5.0% attenuation setting) >49 >45 >27 >18 6 200 200 5.0 3.5 0.8 VDD 5.25
V mA V V
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 frequency300MHz
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DS110126
RFSA2614
Typical Broadband Application Circuit Performance
(with ACG capacitors)
Gain versus Frequency, Reference State (0dB)
0.0 -0.5 -1.0
85C 25C -40C
Normalized Attenuation, Major States
0.0 -5.0 -10.0
S21 (dB)
S21 (dB)
-1.5 -2.0 -2.5 -3.0 -3.5 -4.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
-15.0 -20.0 -25.0 -30.0 -35.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
0.5dB 2dB 8dB 31.5dB
1dB 4dB 16dB
Frequency (GHz)
Frequency (GHz)
RF1 RL versus Frequency, Major States
0
0dB 1dB 0.5dB 2dB
RF2 RL versus Frequency, Major States
0
0dB 1dB 0.5dB 2dB 8dB 31.5dB
-5
4dB 16dB 8dB 31.5dB
-5
4dB 16dB
-10
-10
-15
S22 (dB)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
S11 (dB)
-15
-20
-20
-25
-25
-30
-30 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Frequency (GHz)
Frequency (GHz)
Relative Phase, Major States
60 50 40
Input IP3 versus Frequency, All States, 25C
60
0.5dB 2dB 8dB 31.5dB
1dB 4dB 16dB
55
20 10 0
IIP3 (dBm)
S21 (dB)
30
50
45
States 28 thru 31.5dB
40 -10 -20 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 35 0.0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Frequency (GHz)
DS110126
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RFSA2614
Typical Broadband Application Circuit Performance
(with and without ACG capacitors)
2.0 1.5 1.0 0.5
Worst Case Step Error between Successive States (w/ACG caps)
2.0 1.5 1.0 0.5
Worst Case Step Error between Successive States (no ACG caps)
Step Error (dB)
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)
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
Frequency (GHz)
Frequency (GHz)
Step Error versus Frequency, All States (w/ACG caps)
2.0 1.5 1.0 0.5 2.0 1.5 1.0 0.5
Step Error versus Frequency, All States (no ACG caps)
Step Error (dB)
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)
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
Frequency (GHz)
Frequency (GHz)
Step Error versus Attenuation (w/ACG caps)
2.0 1.5 1.0 0.5 0.0 -0.5
450 MHz 150 MHz 1 GHz 2.7 GHz 3.8 GHz
Step Error versus Attenuation (no ACG caps)
2.0 1.5 1.0 0.5 0.0 -0.5
850 MHz 1 GHz
Step Error (dB)
-1.0 -1.5 -2.0 0 4
Step Error (dB)
850 MHz 2 GHz 3.3 GHz
-1.0
2 GHz 2.7 GHz
-1.5 -2.0
3.3 GHz
3.8 GHz
8
12
16
20
24
28
32
0
4
8
12
16
20
24
28
32
Attenuation State (dB)
Attenuation State (dB)
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DS110126
RFSA2614
Truth Table
Control Bit C16
1 1 1 1 1 1 0 0
C8
1 1 1 1 1 0 1 0
C4
1 1 1 1 0 1 1 0
C2
1 1 1 0 1 1 1 0
C1
1 1 0 1 1 1 1 0
C0.5
1 0 1 1 1 1 1 0
Relative Gain Setting
Max gain -0.5dB -1dB -2dB -4dB -8dB -16dB -31.5dB
Logic Voltage Levels
State Low High Logic 0V to 0.8V 2.0V to 5.0V
DS110126
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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RFSA2614
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 Function NC VDD NC RF1 NC ACG ACG ACG ACG ACG ACG NC ACG NC RF2 NC NC NC D5 D4 D3 D2 D1 D0 GND Description
No internal connection. EVB can be ground or no connect. 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. 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. AC ground connection for operation below 500MHz. No internal connection. EVB can be ground or no connect. AC ground connection for operation below 500MHz. 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.
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DS110126
RFSA2614
Evaluation Board Assembly Drawing
C05/DATA
C4/CLK
C8/PUP
C2/LE
C025
GND
VDD
P1
R7 C8 C7R5
J1 RF1
R6
R4
R1
R2
R8 U1
C12
C13
C11 C18
C17 C14 C16 C15
SA26X4410(C) J99 C19 C20 J100
15.5MIL LINE
DS110126
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
R3
C9 C6 C5 C4 C3 C2 C1
C16
C1
J2 RF2
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RFSA2614
Evaluation Board Schematic
(with ACG capacitors)
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
DS110126
RFSA2614
Evaluation Board Bill of Materials
Description
PCB CAP, 680pF, 10%, 50V, X7R, 0402 CAP, 470pF, 10%, 50V, X7R, 0402 CAP, 1000pF, 10%, 50V, X7R, 0402 RES, 0 , 0402 DNI CONN, SMA, END LNCH, UNIV, HYB MNT, FLT CONN, HDR, ST, PLRZD, 9-PIN RFSA2614SB C13, C15, C16, C17 C11, C12, C19, C20 C7 R1-R6. R8 R7, C1-C6, C8, C9, C14, C18-C20 J1, J2, J99, J100 P1 U1 Heilind Electronics ITW Pancon RFMD PER MAT-21-1038 MPSS100-9-C RFSA2614 Murata Murata Taiyo Yuden (USA), Inc. Kamaya, Inc
Reference Designator
Manufacturer
Manufacturer's P/N
SA26x4410(C) GRM155R71H681KA01E GRM155R71H471KA01E RM UMK105BJ102KV-F RMC1/16SJPTH
Package Drawing
PIN 1 DOT BY MARKING 4.00 0±0 .050 2 .7 00± 0.050 Exp.DAP PIN #1 IDEN TIFIC ATION C HAMFER 0.300 X 4 5°
0.40 0±0 .050
4 .0 00± 0.050
SA2614 YYWW Trace Code
0 .5 00 Bsc 2.70 0±0 .0 50 Exp .D AP
0.25 0±0 .0 50
2.500 R ef.
TOP VIEW
.850 ±0.05 0
BOTTOM VIEW
0 .0 00-.05 0
.20 3 Ref.
SIDE VIEW
YYWW = Date Code, where YY=year, WW=week Trace Code to be assigned by assembly SubCon
DS110126
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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