Revision DS20160316
- 1 of 15 -
Disclaimer: S ubj ect to change without notice
© 2016
Qorvo, Inc.
www.rfmd.com / www.qorvo.com
RFSA2534
50 MHz to 4000 MHz, Digital Step Attenuator
The RFSA2534 is a 5-bit digital step attenuator (DSA) that
features high linearity over the entire 15.5dB gain
control
range with 0.5dB steps and
uses a serial control interface. It
has a low insertion loss of 1.3dB at 2GHz. Patented circuit
architec tur e provides Overshoot
-free transient switching
performance The RFSA2534 is available in a 4.2mm x
4.2mm laminate pa
ckage that is footprint compatible with a
4mm x 4mm QFN 24 lead package.
Functional Block Diagram
Ordering Information
RFSA2534SQ
Sample bag with 25 pieces
RFSA2534SR
7" Reel with 100 pieces
RFSA2534TR13
13" Reel with 2500 piec es
RFSA2534PCK-410
50 MHz to 4000 MHz PCBA w/ 5-piece
sample bag
Pac kage: MCM, 2 4
-pin,
4.2 mm x 4. 2 mm x 0.975 mm
Features
■
5-Bit, 15.5 dB, 0.5 dB Step
■
Patented Circ u it Ar c h itec ture
■
Overshoot-free Transient Switching
Performance
■
Frequency Range 50 MHz to 4000 MHz
■
High Linearity, IIP3 = +52 dBm
■
Serial Control Interface
■
Fast Switching Speed, 200 ns Typical
■
Single Supply 3 V to 5 V Operation
Applications
■
2G through 4G Base Stations
■
Point-to-Point
■
Wi-Fi
■
Test Equipment
Revision DS20160316
- 2 of 15 -
Disclaimer: S ubj ect to change without notice
© 201
6 Qorvo, Inc .
www.rfmd.com / www.qorvo.com
RFSA2534
Absolute Maximum Rati ngs
Parameter Rating Units
Supply Voltage (V DD) −0.5 to +6.0 V
All Other DC and Logic Pins ( When VDD Is Applied Prior to Any
Other Pin Voltages )
−0.5 to +6.0 V
Maximum Input Power at RFIN Pins
+30
dBm
Maximum Input Power at RFOUT Pins +27 dBm
Storage Temperature Range −40 to +150 °C
ESD Rating - Human Body Model (HBM)
1000
V
Moisture Sensitivi t y Level MSL3
Caution! ESD sensitive device.
RFMD Green: RoHS status based on EU
Directiv e 201 1/ 65/ EU (a t time of thi s
docum ent revi s ion ), halogen f re e per IEC
61249-2-21, < 1000p pm each of anti m o n y
trioxide in polymeric materials and red
phosphorus as a flame retardant, and <2%
antimony in solder.
Exceedi ng any one or a combi nation of the Absol ute 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.
Recommended Operating Condition
Parameter
Specification
Units
Min
Typ
Max
Operating Temperature Range
(
Derate RF Input Power Handling Above 85
°
C) −40 +105 °C
Operating Junction Temperature
+125 °C
Supply Voltage
1 +2.7 +5.5 V
Note 1: Device performance is constant over this range, LDO on chip
Electri cal Sp ec i fi cat i o ns
Parameter
Specification
Units Condition
Min
Typ
Max
General Performance
Supply Current 230 µA Steady state operation, c urrent draw during attenuation state transit ions is hi gher
Thermal Resistanc e 78 °C/W A t maximum attenuation state with RF power applied to the ATTIN pin
RF Input Power at RFIN Pin +27 dBm Continuous operati on at +85 °C case temperature
RF Performance
Frequency Range
50 4000 MHz
Inserti on Loss 1.3 dB 2000 MHz, 0 dB attenuation
Attenuation Range
15.5 dB 0.5 dB step size
Absolute Attenuation Error 0.2 ± 4% dB
Input IP3
+52 dBm
Input P0.1dB
+30 dBm
Return Loss 15 dB 50MHz to 4000MHz, RFin and RFout pins, all attenuat i on states
Return Loss
18 dB 700MHz to 2300MHz, RFin and RFout pins, all attenuation states
Return Loss 22 dB 2300MHz to 2700MHz, RFin and RFout pins, all attenuation states
Input and Output Impedance
2 Ω
Switching Speed
200 nsec 50% control to 10% / 90% RF
Successive Step Phase Delt a 3 Deg 2000MHz
Control
Digital Logic Low +0.08 V
Digital Logic Hi gh
+2.0 V
Revision DS20160316
- 5 of 15 -
Disclaimer: S ubj ect to change without notice
© 201
6 Qorvo, Inc .
www.rfmd.com / www.qorvo.com
RFSA2534
Evaluation Board Schematic - 50MHz to 4000MHz Application Circuit
Evaluation
Board Bill of Materials (BOM)
Description
Reference Designator
Manufacturer Manufacturer's P/N
Evaluation Board Performanc e Micro Internat i onal Pt RFSA2534-410(B)
RFSA2534 Module U1 RFMD RFSA2534
CAP, 100pF, 5%, 50V, C0G, 0402 C1-C2 Taiyo Yuden (USA), Inc. RM UMK105 CG101JV-F
CAP, 10000pF, 10%, 16V, X7R, 0402 C3 Taiyo Yuden (USA), Inc. RM EMK105 BJ103KV-F
CONN, SMA, END LNCH, UNIV, HYB MNT, FLT J1-J2 Heilind Elect ronics 142-0751-841
CONN, HDR, ST, P L RZ D, 5-PIN, 0.100” P1 AMP 640454-5
CONN, SKT, 24-PIN DIP, 0.600”, T/H P2 Aries E lectronics Inc. 24-6518-10
Notes:
1. M1 should be mounted into P2 with respect to the Pin 1 alignment of M1 and P2.
Revision DS20160316
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© 201
6 Qorvo, Inc .
www.rfmd.com / www.qorvo.com
RFSA2534
Evaluation Board Programming Using USB Interface
Serial Mode
Refer to the Control Bit Generator (CBG) Software Reference Manual
within the CBG download for detailed
instructions on how to setup the software for use. Apply the supply voltage to P
1. Select RFSA2534 from the
RFMD/Qorvo
Parts List of the CBG user interface. Set the attenuation value using the CBG user interface. The
attenuator is set to the desired state and measurements can be taken.
Evaluation Board Progra m m ing
Using External Bus
Serial Mode
This configur
ation allows the user to control the attenuator through the P1 connector using an external
harness
. Remove the USB interface board if it is currently installed on the evaluation board. Connect a
user
-supplied harness to the P1 connector. Send the appropriate signals onto the serial bus lines in
accordance with the Serial Mode Timing Diagram. The attenuator is set to the desired state and
measurements can be taken.
Serial Mode Attenuation Wor d Tr uth Ta ble
Attenuation Word Attenuation State
(dB)
D0.5 D1 D2 D4 D8
H H H H H 0dB / Reference
Inserti on Loss
L H H H H 0.5 dB
H L H H H 1 dB
H H L H H 2 dB
H H H L H 4 dB
H H H H L 8 dB
L L L L L 15.5 dB
Serial Bus Timing Diagram
Serial Bus Timing
Specifications
Parameter Limit Units Comment
t1 25 MHz max CLK Frequenc y
t2 20 ns min CLK High
t3 20 ns min CLK Low
t4 5 ns min DATA to CLK Setup Time
t5 5 ns min DATA to CLK Hold Time
t6 30 ns min DATA Valid
t7 5 ns min LE to CLK Setup Time
t8 5 ns min CLK to LE Setup Time
t9 10 ns min LE Pulse Width
t10 20 ns max Output Set
Serial Mode Timing Diagram
Revision DS20160316
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© 201
6 Qorvo, Inc .
www.rfmd.com / www.qorvo.com
RFSA2534
Pin Names and Desc riptions
Pin Name Description
1 NC No Internal Connecti on
2 RF IN RF Input: Incident RF power must enter this pin for rated thermal perform ance and reli ability. Do not apply DC
power to this pin. Pin may be DC grounded externally and is grounded thru resistors internal to the part.
3 NC No Internal Connecti on
4 NC No Internal Connecti on
5 NC No Internal Connecti on
6 NC No Internal Connecti on
7 NC No Internal Connecti on
8 CLK Serial Clock I nput
9 LE Latch Enable: The leading edge of si gnal on LE causes the attenuator to change stat e
10 NC No Internal Connecti on
11 SI Serial Data Input
12 NC No Internal Connecti on
13 NC No Internal Connecti on
14 VDD Supply Voltage for DSA and Logic Circuitry
15 NC No Internal Connecti on
16 NC No Internal Connecti on
17 RF OUT
RF Output: Incident RF power must enter this pin for rated thermal performance and reliabil i ty. Do not apply DC
power to this pin. Pin may be DC grounded externally and is grounded thru resistors internal to the part.
18 NC No Internal Connecti on
19 GND Ground this pin on the PCB
20 GND Ground this pin on the PCB
21 GND Ground this pin on the PCB
22 GND Ground this pin on the PCB
23 GND Ground this pin on the PCB
24 GND Ground this pin on the PCB
Revision DS20160316
- 10 of 15 -
Disclaimer: S ubj ect to change without notice
© 201
6 Qorvo, Inc .
www.rfmd.com / www.qorvo.com
RFSA2534
Contact Inform ation
For the latest specifications, additional product inf ormation, worl d wide sales and di str ibuti on locat io ns :
Web: www.rfmd.com Tel: 1-844-890-8163
Email: customer.support@qorvo.com
For information about the me
rger of RFMD and TriQuint as Qorvo:
Web: www.qorvo.com
Impor t a nt Notice
The information contained herein is believed to be reliable. RFMD and/or Qorvo make no warranties regarding the information
contained
herein. RFMD and/or Q or vo as s umes no r espons i bi lit y or l iabi lity what soev er f or any of the
inform atio n containe d
herein.
RFMD and/or Qorvo assumes no responsibility or liability whatsoever for the use of the
information contained herein.
The information co
ntained herein is provided "AS IS, WHERE IS"
and with all faults, and the entire risk associated with such
informat
ion is entire ly with the user. All inform ation contained here in is subject t o change without n otice.
Custom ers should
obtain and verify the l
atest relevant information before placing orders for RFMD and/or Qorvo products.
The information
contained herein or any use of such information does not grant, explicitly or implicitly, to any party any patent rights, licenses,
or any other intellectual property rights, whether with regard to such information itself or anything described by such
information.
RFMD
and/ or Qorvo pr oducts are not warranted or author ized for use as c ritical c omponents in m edical, life -saving, or life
-
sustain ing applications ,
or other app lications where a failure woul d reasonab ly be expected
to caus e se vere pers onal i njur y
or death.
