RFMD RFSA2624PCK-410

RFSA2624
RFSA2624
Serial Controlled Digital
Step AttenuatoR 50MHz to
4000MHz, 6Bit, 0.5dB LSB
SERIAL CONTROLLED DIGITAL STEP ATTENUATOR
50MHz to 4000MHz, 6-BIT, 0.5dB LSB
Package: MCM, 24-Pin, 4.2mmx4.2mm
Features



Frequency Range 50MHz to
4000MHz
6-Bits, 31.5dB Range, 0.5dB
Step
High Linearity, OIP3>48dBm
through over 700MHz to
2700MHz

3V and 5V Logic Compatible

Serial-to-Parallel Controller

Serial Programming Interface

Power-up Programming Modes



On-chip ESD Protection >500V
HBM
Single Supply, 3V to 5V
Operation
Footprint compatible with most
24-pin, 4mm QFNs
Applications




Transceiver IF Applications
Functional Block Diagram
Product Description
RFMD’s RFSA2624 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 RFSA2624 is programmed via a serial mode control interface that is
both 3V and 5V compatible. The RFSA2624 also offers a rugged Class 1B HBM
ESD rating via on-chip ESD circuitry. The MCM package is footprint compatible with
most 24-pin, 4mm, QFN packages.
Cellular, PCS, GSM, UMTS, LTE,
WiMax/WLAN
Wireless Data, Satellite
Terminals
Test Equipment
Ordering Information
RFSA2624SR
RFSA2624SQ
RFSA2624TR7
RFSA2624TR13
RFSA2624PCK-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
GaAs pHEMT
Si CMOS
Si BJT
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.
DS110408
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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RFSA2624
Absolute Maximum Ratings
Parameter
Supply Voltage
Rating
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
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.
Class 1B
Moisture Sensitivity Level
Parameter
Caution! ESD sensitive device.
MSL3
Min.
Specification
Typ.
50
Insertion Loss
Max.
MHz
dB
150MHz, 0dB attenuation
1.9
dB
850MHz, 0dB attenuation
dB
2700MHz, 0dB attenuation
2.8
dB
3800MHz, 0dB attenuation
0.5dB step size
2.3
2.5
Gain Control Range
Condition
4000
1.5
1.7
Unit
31.5
dB
±(0.15+5.0% attenuation setting)
dB
Input IP3 (0 - 15.5dB states)
48
dBm
700MHz to 2700MHz, all states
Input P1dB
27
dBm
700MHz to 2700MHz, all states
Return Loss
13
dB
700MHz to 2700MHz, all states
Control Interface
6
bit
Serial Interface
Step Accuracy
Settling Time
250
nS
tRISE, tFALL (10%/90% RF)
Switching Speed
250
nS
tON, tOFF (50% CTL to 10%/90% RF)
Supply Voltage (VDD)
4.75
Supply Current
Control Voltage (VCTL)
5.0
5.25
5
V
mA
0
0.8
V
Low
2.0
VDD
V
High
Notes:
1. VDD =5V, VCTL =3V, T=25°C
2. Broadband Application Circuit (with ACG capacitors)
3. IIP3 measured with Pin=+10dBm/tone, 1MHz spacing
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS110408
RFSA2624
Typical Performance - Broadband Application Circuit (25°C)
Insertion Loss (De-embedded)
Normalized Attenuation, MajorStates
0.0
0
25C
-0.5
85C
-10
Attenuation (dB)
-1.0
Insection Loss (dB)
-5
-40C
-1.5
-2.0
-2.5
-3.0
-3.5
0.5
2
8
31.5
-20
-25
-30
-40
0.0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
3.0
3.5
4.0
0.0
0.5
2
8
31.5
1.5
2.0
2.5
Frequency (GHz)
3.0
3.5
0
1
4
16
-5
Return Loss (dB)
0
1
4
16
-10
1.0
4.0
0
0
-5
0.5
Return Loss of RF2, MajorStates
Return Loss of RF1, MajorStates
-15
-20
-25
-30
-10
0.5
2
8
31.5
-15
-20
-25
-30
-35
-35
-40
-40
0
0.5
1
1.5
2
2.5
Frequency (GHz)
3
3.5
0
4
0.8
0.6
0.6
0.4
0.4
Step Error(dB)
0.8
0.2
0.0
-0.2
0.5
2
8
31.5
-0.4
-0.6
1
4
16
DS110408
0.5
1
1.5
2
2.5
Frequency (GHz)
3
3.5
4
0.0
-0.2
-0.6
1.5
2
2.5
Frequency (GHz)
1
0.2
-0.4
-0.8
0
0.5
Step Error vs. Attenuation State
Step Error, MajorStates
Step Error (dB)
1
4
16
-35
-4.0
Return Loss (dB)
-15
3
3.5
4
50MHz
500MHz
1GHz
2GHz
3GHz
4GHz
-0.8
0
4
8
12
16
20
24
28
32
Attenuation (dB)
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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RFSA2624
Typical Performance - Broadband Application Circuit (25°C)
(Continued)
Relative Phase, MajorStates
Worst Case Successive Step Error
60
0.8
0.5
2
8
31.5
40
1
4
16
0.6
0.4
30
Error(dB)
Relative Phase (deg)
50
20
10
0.2
0.0
0
-0.2
-10
-0.4
-20
0
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0.5
1
1.5
2
2.5
Frequency (GHz)
3
3.5
4
-0.6
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Frequency(GHz)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS110408
RFSA2624
Truth Table
Control Bit
C16
C8
C4
C2
C1
C0.5
Relative Gain
Setting
1
1
1
1
1
1
Max gain
1
1
1
1
1
0
-0.5dB
1
1
1
1
0
1
-1dB
1
1
1
0
1
1
-2dB
1
1
0
1
1
1
-4dB
1
0
1
1
1
1
-8dB
0
1
1
1
1
1
-16dB
0
0
0
0
0
0
-31.5dB
Note: C 0.5=D0, C1=D1, ... C16=D5 (for the purpose of the example below)
Serial Port Interface
Programming example – 6-bit
SPI Timing Diagram
t6
t1
t2
t3
t4
t8
t5
CLK
CLK
DATA
DATA
MSB
D5
D4
D3
D2
D1
LSB
D0
LE
t7
LE
t9
DOUT
t10
SPI Timing Diagram Specifications
Parameter
Limit
Unit
Comment
t1
25
MHz max
CLK Frequency
State
Logic
t2
20
ns min
CLK High
Low
0V to 0.8V
t3
20
ns min
CLK Low
High
2.0V to 5.0V
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 min
Output Set
DS110408
LOGIC Voltage Levels
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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RFSA2624
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
Function
GND
VDD
GND
RF1
GND
ACG
ACG
ACG
ACG
ACG
ACG
GND
ACG
GND
RF2
GND
GND
GND
NC
PUP
CLK
LE
NC
DATA
GND
Description
DC and RF Ground.
Power supply.
DC and RF Ground.
RF port. External DC block required.
DC and RF Ground.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
DC and RF Ground.
AC ground for operation below 500MHz; leave unconnected above 500MHz.
DC and RF Ground.
RF port. External DC block required.
DC and RF Ground.
DC and RF Ground.
DC and RF Ground.
No internal connection. EVB can be ground or no connect.
Power-up Programming pin. Low=max attenuation (31.5dB) at power-up, High=min attenuation (0dB) at power-up.
Serial Clock.
Latch Enable.
No internal connection. EVB can be ground or no connect.
Serial Data.
DC and RF ground. Must be soldered to EVB ground plane over a bed of vias for thermal and RF performance.
Power-up Programming Truth Table
6 of 9
PUP
Attenuator Setting
Low
Attenuation at max, 31.5dB
High
Attenuation at min, 0dB
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS110408
RFSA2624
C16
C8/PUP
C4/CLK
C2/LE
C1
C05/DATA
C025
GND
R8
U1
R3
R2
R1
R7
C8
C7R5
R4
C9 C6 C5 C4 C3 C2 C1
J1
RF1
R6
P1
VDD
Evaluation Board Assembly Drawing
J2
RF2
C12
C17
C14
C16
C15
C13
C11
C18
SA26X4410(C)
J99
J100
C19
C20
15.5MIL LINE
DS110408
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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RFSA2624
Evaluation Board Schematic
Evaluation Board Bill of Materials (BOM)
Description
Reference Designator
Manufacturer
Manufacturer's P/N
CAP, 680pF, 10%, 50V, X7R, 0402
C13, C15, C16, C17
Murata
GRM155R71H681KA01E
CAP, 0.1uF, 10%, 10V, X5R, 0402
C11, C12, C19, C20
Taiyo Yuden (USA), Inc.
RM LMK105BJ104KV
CAP, 1000pF, 10%, 50V, X7R, 0402
C7
Taiyo Yuden (USA), Inc.
RM UMK105BJ102KV-F
RES, 0 OHM, 0402
R1, R2, R4, R5, R8
Kamaya, Inc
RMC1/16SJPTH
DNI
C1-C6, C8, C9, C14, C18, R3, R6-7
CONN, SMA, END LNCH, UNIV, HYB MNT, FLT
J1, J2, J99, J100
Heilind Electronics
PER MAT-21-1038
PCB
RFSA26X4410(B)
CONN, HDR, ST, PLRZD, 9-PIN
P1
ITW Pancon
MPSS100-9-C
RFSA2624SB
U1
RFMD
RFSA2624
NOTE: Parts with * following the Reference Designator should not be populated on PCBA. RFMD devices (DUT) may require baking per IPC/JEDEC J-STD-020 for a minimum of 24 hours at 125 +5/-0 °C. Assembly must take place within 12 hours of bake completion. Manufacturers' P/Ns are subject to change by the manufacturers following the issue of this document and are thereby included for reference only. Contact RFMD Corporate Engineering Materials with questions regarding specific
Manufacturers' P/Ns. Shaded lines indicate approved alternate components.
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
DS110408
RFSA2624
Package Drawing
DS110408
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected]
9 of 9