• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macomtech.com for additional data sheets and prod uct information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
1
Digital Attenuator, 15.5 dB, 5-Bit
DC - 2.0 GHz
Rev. V1
MAATSS0021
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Features
• 0.5 dB Attenuation Steps to 15.5 dB
• Ultra Low DC Power Consumption
• Low Intermodulation Product: +45 dBm IP3
• Tape and Reel Packaging Available
• Temperature Stability: +/-0.15 dB from -40°C to
+85°C
• Lead-Free SOIC-16 Package
• 100% Matte Tin Plating over Copper
• Halogen-Free “Green” Mold Compound
• 260°C Reflow Compatible
• RoHS* Compliant Versi on of AT-280
Description
M/A-COM’s MAATSS0021 is a 5-bit, 0.5-dB step
GaAs MMIC digital attenuator in a lead-free SOIC-
16 surface mount plastic package. The
MAATSS0021 is ideally suited for use where high
accuracy, fast switching, very low power
consumption and low intermodulation products are
required at a low cost.
Typical applications include radio and cellular
equipment, wireless LANS, GPS equipment and
other gain/level control circuits.
The MAATSS0021 is fabricated with a monolithic
GaAs MMIC using a mature 1-micron process. The
process features full chip passivation for increased
performance and reliability.
Functional Schematic
16 15 14 13 12 11
1 2 3 4 5 6 7 8
10 9
8 dB 4 dB 2 dB 1 dB 0.5 dB
Ordering Information 1
Part Number Package
MAATSS0021 Bulk Packaging
MAATSS0021TR-3000 3000 piece reel
MAATSS0021SMB Sample Board
1. Reference Application Note M513 for reel size information.
Pin Configuration
Pin No. Function Pin No. Function
1 VC1 9 RF2
2 VC1 10 Ground
3 VC2 11 Ground
4 VC2 12 Ground
5 VC3 13 Ground
6 VC3 14 Ground
7 VC4 15 Ground
8 VC5 16 RF1
Absolute Maximum Ratings 2,3
Parameter Absolute Maximum
Input Power:
0.05 GHz
0.5 - 2.0 GHz
+27 dBm
+34 dBm
Control Voltage -8.5 V < VC < +5 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
2. Exceeding any one or combination of these limits may cause
permanent damage to this device.
3. M/A-COM does not recommend sustained operation near
these survivability limits.
* Restrictions on Hazardous Substances, European Union Directive 2002/95/EC.
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macomtech.com for additional data sheets and prod uct information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
2
Digital Attenuator, 15.5 dB, 5-Bit
DC - 2.0 GHz
Rev. V1
MAATSS0021
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Parameter Test Conditions Units Min Typ Max
Reference Insertion Loss DC - 0.1 GHz
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
dB
dB
dB
dB
—
—
—
—
1.1
1.3
1.5
1.8
—
—
—
2.0
Attenuation Accuracy 4 DC - 2.0 GHz ± (0.30 dB +3% of Attenuation Setting in dB) dB
VSWR (Any state) Ratio — 1.5:1 —
Trise, Tfall 10% to 90% RF, 90% to 10% RF nS — 12 —
Ton, Toff 50% Control to 90% RF, 50% Control to 10% RF nS — 18 —
Transients In Band mV — 30 —
1 dB Compression Input Power, 0.05 GHz
Input Power, 0.5 - 2.0 GHz dBm
dBm —
— 22
27 —
—
IP2 0.05 GHz
0.5 - 2.0 GHz
Measured Relative to Input Power
(for two-tone input power up to +5 dBm)
dBm
dBm —
— 53
68 —
—
IP3 0.05 GHz
0.5 - 2.0 GHz
Measured Relative to Input Power
(for two-tone input power up to +5 dBm)
dBm
dBm —
— 40
45 —
—
4. Attenuation acccuracy specifications apply with negative bias control and low inductance grounding.
Truth Table
0 = Vin Low = 0 V = 0 to –0.2 V @ 20 µA maximum
1 = Vin High = -5 V at 20 µA to -8 V at 20 µA maximum
Lead-Free SOIC-16†
† Reference Application Note M538 for lead-free solder reflow
recommendations.
VC5 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Atten.
1 1 1 0 1 0 1 0 Refer-
ence
0 1 1 0 1 0 1 0 0.5 dB
1 0 1 0 1 0 1 0 1 dB
1 1 0 1 1 0 1 0 2 dB
1 1 1 0 0 1 1 0 4 dB
1 1 1 0 1 0 0 1 8 dB
0 0 0 1 0 1 0 1 15.5 dB
Control Inputs
• North America Tel: 800.366.2266 / Fax: 978.366.2266
• Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300
• Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macomtech.com for additional data sheets and prod uct information.
M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
3
Digital Attenuator, 15.5 dB, 5-Bit
DC - 2.0 GHz
Rev. V1
MAATSS0021
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Typical Performance Curves
Insertion Loss Attenuation Accuracy
VSWR
0.0
0.5
1.0
1.5
2.0
2.5
3.0
0.0 0.5 1.0 1.5 2.0
+25°C
-40°C
+85°C
Frequency (GHz)
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.00.51.01.52.0
0. 5 d B Att e n
1 dB A tt en
2 dB A tt en
4 dB A tt en
8 dB A tt en
15.5 dB Atten
Frequency (GHz)
1.0
1.1
1.2
1.3
1.4
1.5
0.0 0.5 1.0 1.5 2.0
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Frequency (GHz)
