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 AT-230
Digital Attenuator, 28 dB, 3-Bit DC - 2.0 GHz
Features
* * * * * * * 4-dB Attenuation Steps to 28 dB High Accuracy Low DC Power Consumption: 50 W Low Intermodulation Product: +50 dBm IP3 Temperature Range: -40C to +85C SOIC-14 Plastic Package Tape and Reel Packaging Available Rev. V4
Functional Schematic
RF1
14
GND
13
GND
12
GND
11
GND
10
GND
9
RF2
8
16 dB
8 dB
4 dB
Description
M/A-COM's AT-230 is a 3-bit, 4-dB step GaAs MMIC digital attenuator in a low cost SOIC 14-lead surface mount plastic package. The AT-230 is ideally suited for use where high accuracy, fast switching, very low power consumption and low intermodulation products are required. Typical applications include radio and cellular equipment, wireless LANs, GPS equipment and other Gain/Level Control circuits. The AT-230 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability.
1
2
3
4
5
6
7
VC1
VC1
VC2
VC2
VC3
VC3
GND
Pin Configuration
Pin No.
1 2
Function
VC1 VC1 VC2 VC2 VC3 VC3 Ground
Pin No.
8 9 10 11 12 13 14
Function
RF2 Ground Ground Ground Ground Ground RF1
Ordering Information
Part Number
AT-230 AT-230TR
1
3
Package
SOIC 14-Lead Plastic Package Forward Tape & Reel
4 5 6 7
1. Reference Application Note M513 for reel size information.
Absolute Maximum Ratings 2
Parameter
Input Power: 50 MHz 500-2000 MHz Control Voltage Operating Temperature Storing Temperature
Absolute Maximum
+27 dBm +34 dBm +5V, -8.5V -40C to +85C -65C to +150C
2. Exceeding any one or combination of these limits may cause permanent damage to this device. 1
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. 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. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-230
Digital Attenuator, 28 dB, 3-Bit DC - 2.0 GHz
Electrical Specifications: TA = 25C, Z0 = 50
Parameter
Reference Insertion Loss
Rev. V4
Test Conditions
DC-0.1 GHz DC-0.5 GHz DC-1.0 GHz DC-2.0 GHz DC-1.0 GHz DC-2.0 GHz
Units
dB dB dB dB
Min
-- -- -- --
Typ
1.2 1.5 1.6 1.8
Max
1.4 1.7 1.8 2.1
Attenuation Accuracy VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression (Input Power)
(0.15 dB +3% of Atten Setting in dB) dB (0.30 dB +3% of Atten Setting in dB) dB Ratio -- -- -- -- -- -- -- -- 1.2:1 12 18 25 20 28 45 68 -- -- -- -- -- -- -- --
10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band 0.05 GHz 0.5-2.0 GHz 0.05 GHz 0.5-2.0 GHz Measured Relative to Input Power (for two-tone input power up to +5 dBm) 0.05 GHz 0.5-2.0 GHz Measured Relative to Input Power (for two-tone input power up to +5 dBm)
nS nS mV dBm dBm dBm dBm
IP2
IP3
dBm dBm
-- --
40 50
-- --
SOIC-14
Truth Table
Control Input VC3 VC3 VC2 VC2 VC1 VC1
1 0 1 1 0 0 1 0 0 1 1 1 0 1 0 0 0 1 0 1 1 1 1 0 0 0 0 0 1 1
Atten (dB)
Reference 4 dB 8 dB 16 dB 28 dB
0 = VIN Low = 0 V to -0.2 V @ 20 A maximum. 1 = VIN High = -5 V @ 10 A typical to -8 V @ 200 A maximum.
2
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. 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. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.
AT-230
Digital Attenuator, 28 dB, 3-Bit DC - 2.0 GHz
Typical Performance Curves
Insertion Loss
3.0
25 -40 +85
Rev. V4
Attenuation
30
2.5
25
2.0
20
1.5
15
1.0
10
0.5
5
0.0 0.0
0.5
1.0
1.5
2.0
0 0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
VSWR
2.0
Attenuation Accuracy
1.5
AttenDev 4 AttenDev8 AttenDev16 AttenDev28
1.8
1.0
Insertion Loss 4 dB Atten 8 dB Atten 16 dB Atten
0.5
1.6
0.0
1.4
-0.5
1.2
-1.0
1.0 0.0
-1.5
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Frequency (GHz)
3
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions * North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, * Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. * Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. 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. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed.
changes to the product(s) or information contained herein without notice.


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