DAT-31A-PN+ [MINI]
Digital Step Attenuator;
| 型号： | DAT-31A-PN+ |
| 厂家： | 
MINI-CIRCUITS |
| 描述： | Digital Step Attenuator |
| 文件： | 总8页 (文件大小：544K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DSuirfgacietaMlouSnttep Attenuator
DAT-31A+ Series
50Ω 0 to 31 dB, 1.0 dB Step DC to 4.0 GHz
The Big Deal
• Wideband, operates up to 4 GHz
• Immune to latchup
CASE STYLE: DG983-2
• High IP3, 52 dBm
Product Overview
The DAT-31A+ series of 50Ω digital step attenuators provides adjustable attenuation from 0 to 31 dB in
1.0 dB steps. The control is a 5-bit serial/parallel interface, and the attenuators operate with either single
positive or dual (positive and negative) supply voltage. DAT-31A+ series models are produced by a unique
CMOS process on silicon, offering the performance of GaAs with the advantages of conventional CMOS
devices.
Key Features
Feature
Advantages
Wideband operation, specified from DC
to 4.0 GHz
Can be used in multiple applications such as communications, satellite and defense,
reducing part count.
Serial or parallel interface
Good VSWR, 1.2:1 typ.
Models available with serial or parallel interface mode to suit customer demand.
Eases interfacing with adjacent components and results in low amplitude ripple.
Single positive supply models:
(Model suffixes: -SP+ and –PP+)
+2.3 to +3.6V+
Use of single positive supply simplifies power supply design. An internal negative voltage
generator supplies the desired negative voltage. Single positive supply results in excellent
spurious performance, -140 dBm typical.
Dual supply models:
(Model suffixes: -SN+ and –PN+)
+2.7 to +3.6V (Positive) and
-3.6 to -3.2V (Negative)
Dual supply provides spurious-free operation. It also allows fast switching up to 1 MHz (vs.
25 kHz for single supply).
Useable over a wide range of supply
voltages, +2.3/2.7 to 5.2V
Wide range fo positive operating voltages allows the DAT-31A+ Series of models to be used
in a wide range of applications. See Application Note AN-70-006 for operation above +3.6V
Footprint compatible to DAT-31-XX+
Series (XX=SN/SP/PN/PP)
Can fit into existing footprint and provide wideband performance, to 4 GHz instead of
2.4 GHz.
®
Mini-Circuits
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
Page 1 of 8
Digital Step Attenuator 50Ω DC-4000 MHz
31 dB, 1 dB Step
5 Bit, Parallel Control Interface, Dual Supply Voltage
Product Features
• Immune to latch up
• Excellent accuracy, 0.1 dB Typ
• Parallel control interface
• Fast switching control frequency, up to 1 MHz typ.
• Low Insertion Loss
• High IP3, +52 dBm Typ
• Very low DC power consumption
DAT-31A-PN+
CASE STYLE: DG983-2
• Excellent return loss, 20 dB Typ
• Small size 4.0 x 4.0 mm
+RoHS Compliant
The +Suffix identifies RoHS Compliance. See our web site
for RoHS Compliance methodologies and qualifications
Typical Applications
• Base Station Infrastructure
• Portable Wireless
• CATV & DBS
• MMDS & Wireless LAN
• Wireless Local Loop
• UNII & Hiper LAN
• Power amplifier distortion canceling loops
General Description
The DAT-31A-PN+ is a 50Ω RF digital step attenuator that offers an attenuation range of 31 dB in 1.0 dB
steps. The control is a 5-bit parallel interface, operating on dual supply voltage (positive & negative). The
DAT-31A-PN+ is produced using a unique CMOS process on silicon, offering the performance of GaAs, with
the advantages of conventional CMOS devices.
Simplified Schematic
RF Input
RF Out
16dB
8dB
4dB
2dB
1dB
Parallel Control
Latch Enable
Control Logic Interface
REV. C
M164761
DAT-31A-PN+
MCL NY
171110
Page 2 of 8
®
Mini-Circuits
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
Digital Step Attenuator
RF Electrical Specifications(Note 1), DC-4000 MHz, TAMB=25°C, VDD=+3V, VSS=-3.2V
DAT-31A-PN+
Freq. Range
Parameter
Min.
Typ.
Max.
Units
(GHz)
DC-1
1-2.4
2.4-4
DC-1
1-2.4
2.4-4
DC-1
1-2.4
2.4-4
DC-1
1-2.4
2.4-4
DC-1
1-2.4
2.4-4
DC-1
1-2.4
2.4-4
—
—
0.02
0.05
0.1
0.1
0.15
0.25
0.15
0.25
0.35
0.2
Accuracy @ 1 dB Attenuation Setting
dB
—
—
0.05
0.15
0.15
0.07
0.15
0.23
0.03
0.15
0.6
Accuracy @ 2 dB Attenuation Setting
Accuracy @ 4 dB Attenuation Setting
Accuracy @ 8 dB Attenuation Setting
Accuracy @ 16 dB Attenuation Setting
dB
dB
dB
dB
dB
—
—
0.25
0.5
—
—
0.2
0.5
0.8
—
—
0.1
0.3
0.15
1.1
0.7
1.45
1.9
—
—
—
1.3
Insertion Loss (note 2) @ all attenuator set to 0dB
Input IP3 (note 3) (at Min. and Max. Attenuation)
1.6
2.4
2.1
3.0
DC-4
DC-4
—
—
—
+52
+24
—
—
—
dBm
dBm
Input Power @ 0.2dB Compression (note 3)
(at Min. and Max. Attenuation)
10 kHz to 50 MHz
See Fig. 1
Input Operating Power
VSWR
dBm
:1
>50 MHz
DC-1
—
—
—
—
+24
1.5
1.6
1.9
1.2
1.2
1.4
1-2.4
2.4-4
Notes:
1. Tested on Evaluation Board TB-340, See Figure 3.
2. Insertion loss values are de-embedded from test board Loss (test board’s Insertion Loss: 0.10dB @100MHz, 0.35dB @1000MHz, 0.60dB @2400MHz, 0.75dB @4000MHz).
3. Input IP3 and 1dB compression degrades below 1 MHz. Input power not to exceed max operating specification for continuous operation.
DC Electrical Specifications
Switching Specifications
Parameter
Min.
Typ.
Max.
Units
Parameter
Min.
Typ.
Max.
Units
Sec
V
dd, Supply Voltage
ss, Supply Voltage
2.7
-3.6
—
3
-3.3
—
3.6(Note 4)
-3.2
V
V
Switching Speed, 50% Control to
0.5dB of Attenuation Value
—
—
1.0
1.0
—
—
µ
V
Switching Control Frequency
mHz
I
dd Supply Current
ss Supply Current
100
µA
µA
V
I
—
16
—
40
Control Input Low
Control Input High
Control Current
-0.3
1.17
—
+0.6
—
3.6
20(Note 5)
V
—
µA
4. For operation above +3.6V, see Application Note AN-70-006
5. Except, 30µA typ for C16, PUP1 at +3.6V
Absolute Maximum Ratings(Note 6,7)
Parameter
Ratings
Operating Temperature
Storage Temperature
Vdd
-40°C to 105°C
-65°C to 150°C
-0.3V Min., 5.5V Max.
-3.5V Min., 0.3V Max.
-0.3V Min., 3.6V Max.
+30dBm
Vss
Voltage on any control input
Input Power
Thermal Resistance
6. Permanent damage may occur if any of these limits are exceeded.
7. Operation between max operating and absolute max input power will result in reduced reliability.
37°C/W
Figure 1. Max Input Operating Power vs Frequency
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Page 3 of 8
Digital Step Attenuator
DAT-31A-PN+
Pin Configuration (Top View)
Pin Description
Pin
Number
Function
Description
C16
RF in
N/C
1
2
Control for Attenuation bit, 16dB (Note 3,6)
RF in port (Note 1)
3
Not connected (Note 4)
Ground connection
1
2
3
4
5
15 C8
C16
RFin
N/C
GND
LE
GND
LE
4
14
13
12
11
RFout
GND
VSS
2x2mm
Paddle
ground
5
Latch Enable Input (Note 2)
Positive Supply Voltage
Power-up selection (Note 6)
Power-up selection
VDD
6
PUP1
PUP2
VDD
7
GND
8
9
Positive Supply Voltage
Ground connection
GND
GND
VSS
10
11
12
13
14
15
16
17
18
19
20
Paddle
Ground connection
Negative Supply Voltage
Ground connection
GND
RF out
C8
RF out port (Note 1)
Control for attenuation bit, 8 dB
Control for attenuation bit, 4 dB
Control for attenuation bit, 2 dB
Ground Connection
Device Marking
C4
C2
GND
C1
Pin 1
Index
Control for attenuation bit, 1 dB
Not connected (Note 4)
Paddle ground (Note 5)
N/C
MCL
GND
Notes:
DS50
1. Both RF ports must be held at 0VDC or DC blocked with an external series capacitor.
2. Latch Enable (LE) has an internal 2MΩ to internal positive supply voltage.
3. Place a 10KΩ resistor in series, as close to pin as possible to avoid freq. resonance.
4. Place a shunt 10KΩ resistor to GND
5. The exposed solder pad on the bottom of the package (See Pin configuration) must be
grounded for proper device operation.
6. This pin has an internal 200 kΩ resistor to ground.
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Page 4 of 8
Digital Step Attenuator
Simplified Schematic
DAT-31A-PN+
RF Input
RF Out
16dB
8dB
4dB
2dB
1dB
Parallel Control
Latch Enable
Control Logic Interface
The DAT-31A-PN+ parallel interface consists of 6 control bits that select the desired attenuation state, as
shown in Table 1: Truth Table
Table 1. Truth Table
Attenuation
C16
C8
C4
C2
C1
State
Reference
1 (dB)
0
0
0
0
0
1
1
0
0
0
0
1
0
1
0
0
0
1
0
0
1
0
0
1
0
0
0
1
0
1
0
0
0
0
1
2 (dB)
4 (dB)
8 (dB)
16 (dB)
31 (dB)
Note: Not all 32 possible combinations of C1 - C16 are shown
in table
The parallel interface timing requirements are defined by Figure 2 (Parallel Interface Timing Diagram) and
Table 2 (Parallel Interface AC Characteristics), and switching speed.
For latched parallel programming the Latch Enable (LE) should be held LOW while changing attenuation
state control values, then pulse LE HIGH to LOW (per Figure 2) to latch new attenuation state into device.
For direct parallel programming, the Latch Enable (LE) line should be pulled HIGH. Changing attenuation
state control values will change device state to new attenuation. Direct mode is ideal for manual control of
the device (using hardwire, switches, or jumpers).
Figure 2: Parallel Interface Timing Diagram
Table 2. Parallel Interface AC Characteristics
Symbol
Parameter
Min.
10
Max.
Units
ns
LE
LE minimum pulse width
tLEPW
tPDSUP
tPDHLD
Data set-up time before
clock rising edge of LE
10
ns
Parallel Data
C16:C0.5
Data hold time
after clock falling edge of LE
10
ns
tLEPW
tPDSUP
tPDHLD
Pin 20 must always be low to prevent the attenuator from entering an unknown state.
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Page 5 of 8
Digital Step Attenuator
DAT-31A-PN+
Power-up Control Settings
The DAT-31A-PN+ always assumes a specifiable attenuation setting on power-up, allowing a known attenu-
ation state to be established before an initial parallel control word is provided.
When the attenuator powers up with LE=0, the control bits are automatically set to one of four possible val-
ues .These four values are selected by the two power-up control bits,PUP1 and PUP2 ,as shown in Table 3:
(Power-Up Truth Table, Parallel Mode).
Table 3. Power-Up Truth Table, Parallel Mode
Attenuation State
Reference
8 (dB)
PUP1
PUP2
LE
0
0
0
1
1
0
1
0
1
0
16 (dB)
0
31.5 (dB)
0
Defined by C1-C16
(See Table 1-Truth Table)
X (Note 1)
X (Note 1)
1
Note 1: PUP1 and PUP2 Connection may be 0, 1, GROUND, or not con-
nect, without effect on attenuation state.
Power-Up with LE=1 provides normal parallel operation with C1-C16, and PUP1 and PUP2 are not active.
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Page 6 of 8
Digital Step Attenuator
DAT-31A-PN+
TB-340
Bill of Materials (TB-340)
N5, N7, N9, N11,
N13, N15,
Resistor 0603 10 KOhm +/- 1%
N21 & N25
N28 & N29
N37 - N39
N17
Resistor 0603 475 Ohm +/- 1%
Resistor 0603 0 Ohm
Resistor 0402 10 KOhm +/- 1%
N6, N8, N10, N12,
N14, N16,
N24, N26, N31
& N33
NPO Capacitor 0603 100pF +/- 5%
N27, N32 & N34
N3 & N4*
N23*
Tantalum Capacitor 0805 100nF +/- 10%
Hex Invert Trigger MSL1
Dual Schmitt Trigger Buffer SC-70 MSL1
Notes
1. Both RF ports must be held at 0VDC or DC blocked with an external series capacitor.
2. Test Board TB-340 is designed for operation for VDD=2.3 to 3.6V. For operation over 3.6V to 5.2V, See Application Note AN-70-006
3. VDD=Vdd
Fig 3. Evaluation Board Schematic,TB-340, used for characterization (DUT not soldered on TB-340)
Test Equipment
Measurement Conditions
For Insertion Loss, Isolation and Return Loss:
Agilent’s E5071C Network Analyzer & E3631A Power Supply.
For Compression:
For Insertion Loss, Isolation and Return Loss:
VDD=+2.7/+3/+5.5V &Pin=0dBm
VSS=-3.2/-3.6V
Agilent’s N9020A Signal Analyzer, E8247C RF Generator,
E3631A Power Supply & U2004A Power Sensor.
For Input IP3:
For Compression: Pin=0/+24dBm. VDD=+3V, VSS=-3V
Agilent’s N9020A Signal Analyzer, N5181A
Signal Generators, E3631A Power Supply, U2004A Power Sensor.
For Spurs:
For Input IP3: Pin=+10dBm/tone.
Tone spacing: 0.1 MHz to 1 MHz RF Freq and 1 MHz to 4200 MHz RF Freq,
VDD=+3V, VSS=-3V
Agilent N5181A Signal Generator, E4440A Spectrum Analyzer.
For Switching Time:
For Spurs: RF IN at 1000MHz and -20dBm. VDD=+3V
Agilent’s N5181A Signal Generator, 81110A Pulse Generator,
54832B Oscilloscope, E3631A Power Supply.
For Max Control Frequency:
For Switching Time:
RF Freq=501MHz/0dBm, Pulse for LE=1Hz/0/+3.4V, Delay=500ms,
Agilent’s N5181A Signal Generator, N9020A Signal Analyzer,
Width=500ms. VDD=+3V & VSS=-3V
E3631A Power Supply, 81110A Pulse Generator.
For Max Control Frequency:
RF Freq=501MHz, 0dBm. VDD=+3V, VSS=-3V
®
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Page 7 of 8
Digital Step Attenuator
DAT-31A-PN+
Additional Detailed Technical Information
additional information is available on our dash board. To access this information click here
Data Table
Performance Data
Case Style
Swept Graphs
S-Parameter (S2P Files) Data Set (.zip file)
DG983-2 Plastic package, exposed paddle, lead finish: NiPdAu
Tape & Reel
F87
Standard quantities available on reel
7” reels with 20, 50, 100 or 200 devices
13” reels with 3K devices
Suggested Layout for PCB Design
Evaluation Board
PL-188
TB-340
Environmental Ratings
ENV33T1
ESD Rating
Human Body Model (HBM): Class 1C (1000 to <2000V) in accordance with MIL-STD-883 method 3015
MSL Rating
Moisture Sensitivity: MSL1 in accordance with IPC/JEDEC J-STD-020D
MSL Test Flow Chart
Start
Visual
Inspection
Electrical Test
SAM Analysis
Soak
85°C/85RH
168 hours
Reflow 3 cycles,
260°C
Bake at 125°C,
24 hours
Finish
Visual
Inspection
Electrical Test
SAM Analysis
Additional Notes
A. Performance and quality attributes and conditions not expressly stated in this specification document are intended
to be excluded and do not form a part of this specification document.
B. Electrical specifications and performance data contained in this specification document are based on Mini-Circuit’s
applicable established test performance criteria and measurement instructions.
C. The parts covered by this specification document are subject to Mini-Circuits standard limited warranty and terms
and conditions (collectively, “Standard Terms”); Purchasers of this part are entitled to the rights and benefits
contained therein. For a full statement of the Standard Terms and the exclusive rights and remedies thereunder,
please visit Mini-Circuits’ website at www.minicircuits.com/MCLStore/terms.jsp
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Mini-Circuits
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Page 8 of 8
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