DAT-31A-PN+ [MINI]

Digital Step Attenuator;
DAT-31A-PN+
型号: DAT-31A-PN+
厂家: MINI-CIRCUITS    MINI-CIRCUITS
描述:

Digital Step Attenuator

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DSuirfgacietaMlouSnttep Attenuator  
DAT-31A+ Series  
500 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 50digital 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 50DC-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 50RF 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  
®
Mini-Circuits  
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com  
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 2Mto internal positive supply voltage.  
3. Place a 10Kresistor in series, as close to pin as possible to avoid freq. resonance.  
4. Place a shunt 10Kresistor 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 kresistor to ground.  
®
Mini-Circuits  
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com  
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.  
®
Mini-Circuits  
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com  
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.  
®
Mini-Circuits  
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com  
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  
®
Mini-Circuits  
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com  
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  
®
Mini-Circuits  
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com  
Page 8 of 8  

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