AT-220
11/15/96 1:49 PM
Page 1
(Black plate)
Digital Attenuator, 30 dB, 4-Bit
DC - 2 GHz
Features
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AT-220
V3.00
SO-16
Pin #16
Attenuation 2-dB Steps to 30 dB
High Accuracy +/-3%
Temperature Stability +/-0.15 dB from -40擄C to +85擄C
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
-B-
Pin #1
Orientation
Mark
.0532-.0688
(1.35-1.75)
-C-
0.3859-0.3937
(9.80-10.00)
-A-
.0099-.0196 x 45擄
Chamfer
(0.25-0.50)
0擄-8擄
.0075-.0098
(0.19-0.25)
Description
M/A-COM鈥檚 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 = 鹵 0.010 (.xx = 鹵 0.25)
.xx = 鹵 0.02 (.x = 鹵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 Speci鏗乧ations,
T
A
= 25擄C
Parameter
Reference Insertion Loss
Test Conditions
2
DC 鈥?0.1 GHz
DC 鈥?0.1 GHz
DC 鈥?1.0 GHz
DC 鈥?2.0 GHz
DC 鈥?1.0 GHz
DC 鈥?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
鹵(0.15 dB + 3% of Attenuation Setting in dB) dB
鹵(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 鈥?2.0 GHz
Measured Relative
0.05 GHz
to Input Power
0.5 鈥?2.0 GHz
(For two-tone Input Power Up to +5 dBm)
Measured Relative
to Input Power
(For two-tone Input Power Up to +5 dBm)
0.05 GHz
0.5 鈥?2.0 GHz
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
dBm
12
18
25
20
28
45
68
40
50
Attenuation Accuracy
3
VSWR
Trise, Tfall
Ton, Toff
Transients
1 dB
Compression
IP
2
IP
3
1. Refer to 鈥淭ape and Reel Packaging鈥?Section, or contact factory.
2. All measurements at 1 GHz in a 50鈩?system, unless otherwise speci鏗乪d.
3. Attenuation accuracy speci鏗乧ations apply with negative bias control and low inductance grounding.
Speci鏗乧ations Subject to Change Without Notice.
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
1
Asia/Paci鏗乧: Tel. +81 3 3263 8761
Fax +81 3 3263 8769
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
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