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AT-220
11/15/96 1:49 PM
Page 1
(Black plate)
Digital Attenuator, 30 dB, 4-Bit DC - 2 GHz
Features
q q q q q q q
AT-220
V3.00
SO-16
Pin #16
Attenuation 2-dB Steps to 30 dB High Accuracy +/-3% Temperature Stability +/-0.15 dB from -40C to +85C Low Intermodulation Product: +50 dBm IP3 Low DC Power Consumption: 50 mW Low Cost SOIC 16 Plastic Package Tape and Reel Packaging Available1
.1497-.1574 .2284-.2440 (3.80-4.00) (5.80-6.20) .010(0.25) M B M -BPin #1 Orientation Mark .0532-.0688 (1.35-1.75)
-C-
0.3859-0.3937 (9.80-10.00) -A-
.0099-.0196 x 45 Chamfer (0.25-0.50) 0-8 .0075-.0098 (0.19-0.25)
Description
M/A-COM's AT-220 is a 4-bit, 2-dB step GaAs MMIC digital attenuator in a low cost SOIC 16-lead surface mount plastic package. The AT-220 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-220 is fabricated with a monolithic GaAs MMIC using a mature 1-micron process. The process features full chip passivation for increased performance and reliability.
.004 (0.10) .0040-.0098 0.050(1.27) BSC. (0.10-0.25) .013-.020 TYP (0.33-0.51) .010(0.25) M C A M B S .016-.050 (0.40-1.27)
16-Lead SOP outline dimensions Narrow body .150 (All dimensions per JEDEC No. MS-012-AC, Issue C) Dimensions in ( ) are in mm. Unless Otherwise Noted: .xxx = 0.010 (.xx = 0.25) .xx = 0.02 (.x = 0.5)
Ordering Information
Part Number AT-220 PIN AT-220TR AT-220RTR Package SOIC 16-Lead Plastic Package Forward Tape & Reel Reverse Tape & Reel
Electrical Specifications, TA = 25C
Parameter Reference Insertion Loss Test Conditions2 DC - 0.1 GHz DC - 0.1 GHz DC - 1.0 GHz DC - 2.0 GHz DC - 1.0 GHz DC - 2.0 GHz Unit Min. Typ. Max dB 1.2 1.4 dB 1.5 1.7 dB 1.6 1.8 dB 1.8 2.1 (0.15 dB + 3% of Attenuation Setting in dB) dB (0.30 dB + 3% of Attenuation Setting in dB) dB 1.2:1 10% to 90% RF, 90% to 10% RF 50% Control to 90% RF, 50% Control to 10% RF In Band Input Power 0.05 GHz Input Power 0.5 - 2.0 GHz Measured Relative 0.05 GHz to Input Power 0.5 - 2.0 GHz (For two-tone Input Power Up to +5 dBm) Measured Relative 0.05 GHz to Input Power 0.5 - 2.0 GHz (For two-tone Input Power Up to +5 dBm) nS nS mV dBm dBm dBm dBm dBm dBm 12 18 25 20 28 45 68 40 50
Attenuation Accuracy3 VSWR Trise, Tfall Ton, Toff Transients 1 dB Compression IP2
IP3
1. Refer to "Tape and Reel Packaging" Section, or contact factory. 2. All measurements at 1 GHz in a 50 system, unless otherwise specified. 3. Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
Specifications Subject to Change Without Notice.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883
s
1
Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769
s
Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020
AT-220
11/15/96 1:49 PM
Page 2
(Black plate)
Digital Attenuator, 30 dB, 4-Bit Absolute Maximum Ratings1
Parameter Max. Input Power 50 MHz 500-2000 MHz Control Voltage Operating Temperature Storage Temperature Absolute Maximum +27 dBm +34 dBm +5V, -8.5V -40C to +85C -65C to +150C
AT-220
V3.00
Functional Schematic
RF1 GNDGND GND GND GND GND RF2 16 15 14 13 12 11 10 9
8 dB
4 dB
2 dB
1 dB
1. Operation of this device above any one of these parameters may cause permanent damage.
1 1 2 2 3 3 4 5 6 7 0 8 VC1 VC1 VC2 VC2 VC3 VC3 VC4 VC4
Pin Configuration
Pin 1 2 3 4 5 6 7 8 Description VC1 VC1 VC2 VC2 VC3 VC3 VC4 VC4 Pin No. 9 10 11 12 13 14 15 16 Description RF2 GND GND GND GND GND GND RF1
Truth Table
Control Inputs VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 Attenuation (dB) 1 0 1 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 0 0 1 0 0 1 1 1 1 0 1 0 0 0 0 1 0 1 1 1 1 1 0 0 0 0 0 0 1 1 Reference 2 dB 4 dB 8 dB 16 dB 30 dB
Typical Performance
INSERTION LOSS vs FREQUENCY
3.0 + 85C
"0" = Vin Low, Vin Low = 0V, "1" = Vin High, Vin High = -5V "0" = 0 to -0.2V @ 20 A Max "1" = -5V @ 10 A typ to -8V @ 200 A Max
DEVIATION FROM NOMINAL ATTENUATION (dB)
ATTENUATION ACCURACY vs FREQUENCY
1.5 1 2 dB ATTEN 0.5 0 -0.5 -1 -1.5 0.0 30 dB ATTEN 4 dB ATTEN 16 dB ATTEN 8 dB ATTEN
LOSS (dB)
2.0
1.0
+ 25C
- 40C
0 0 0.5 1.0 1.5 2.0
FREQUENCY (GHz) VSWR vs FREQUENCY
2.0 1.8
0.5
1.0
1.5
2.0
FREQUENCY (GHz) ATTENUATION vs FREQUENCY
0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 -24 -26 -28 -30 -32
16 dB ATTEN 4 dB ATTEN 2 dB ATTEN
VSWR
1.6 1.4
INSERTION LOSS 1.2 1.0 0 0.5 8 dB ATTEN 1.0 1.5 2.0
LOSS (dB)
0.0
0.5
1.0
1.5
2.0
FREQUENCY (GHz)
Specifications Subject to Change Without Notice.
FREQUENCY (GHz)
2
North America: Tel. (800) 366-2266 Fax (800) 618-8883
s
M/A-COM, Inc.
Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769
s
Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020
AT-220
11/15/96 1:49 PM
Page 3
(Black plate)
Digital Attenuator, 30 dB, 4-Bit Swept Data Characterized in 75 Ohms
S11 vs FREQUENCY
0 32
AT-220
V3.00
ATTENUATION vs FREQUENCY
ATTENUATION (dB)
0.8 1
-5
4 dB 0 dB
28 24 20 16 12 8 4 0 0 0.2 0.4 0.6 0.8 1
S11 (dB)
-10 -15 -20 -25 -30 0 0.2 0.4 0.6
2 dB
8 dB 16 dB FREQUENCY (GHz) 30 dB
FREQUENCY (GHz)
Specifications Subject to Change Without Notice.
M/A-COM, Inc.
North America: Tel. (800) 366-2266 Fax (800) 618-8883
s
3
Asia/Pacific: Tel. +81 3 3263 8761 Fax +81 3 3263 8769
s
Europe: Tel. +44 (1344) 869 595 Fax +44 (1344) 300 020
AT-220
11/15/96 1:49 PM
Page 3
(Cyan plate)
AT-220
11/15/96 1:49 PM
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(Magenta plate)
AT-220
11/15/96 1:49 PM
Page 3
(Yellow plate)

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