Digital Attenuator, 15.5 dB, 5-Bit
DC - 2 GHz
Features
q
q
AT-280
V 2.00
SO-16
q
q
q
Attenuation: 0.5-dB Steps to 15.5 dB
Temperature Stability: 鹵 0.15 dB from -40擄C to
+85擄C Typical
Ultra Low DC Power Consumption
Low Intermodulation Products, IP3: 45 dBm
Tape and Reel Packaging Available
Description
M/A-COM's AT-280 is a 5-bit, 0.5 dB-step GaAs MMIC
digital attenuator in a low cost SOIC 16-lead surface mount
plastic package. The AT-280 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 AT-280 is fabricated with a monolithic GaAs MMIC
using a mature 1-micron process. The process features full
chip passivation for increased performance and reliability.
Ordering Information
Part Number
AT-280 PIN
AT-280TR
AT-280RTR
assignment.
Package
SOIC 16-Lead
Forward Tape & Reel*
Reverse Tape & Reel*
Electrical Specifications, T
A
= 25擄C
Parameter
Reference
Insertion
Loss
Attenuation Accuracy
2
VSWR
Trise, Tfall
Ton, Toff
Transients
One dB
Compression
IP2
(any state)
Test Conditions
2
*
If specific reel size is required, consult factory for part number
Unit
dB
dB
dB
dB
Min.
Typ.
1.1
1.3
1.5
1.8
Max
1.3
1.5
1.8
2.0
DC 鈥?0.1 GHz
DC 鈥?0.5 GHz
DC 鈥?1.0 GHz
DC 鈥?2.0 GHz
DC 鈥?1.0 GHz
DC 鈥?2.0 GHz
鹵 (0.20 dB + 3% of Atten. Setting in dB) dB
鹵 (0.30 dB + 3% of Atten. Setting in dB) dB
1.5:1
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
dBm
1.8:1
12
18
30
22
27
53
68
40
45
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, 50% Control to 10% RF
In Band
Input Power
Input Power
0.05 GHz
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
0.05 GHz
to Input Power
0.5 鈥?2.0 GHz
(for two-tone input power up to +5 dBm)
IP3
1. All measurements at 1 GHz in a 50鈩?system, unless otherwise specified.
2. Attenuation accuracy specifications apply with negative bias control and low inductance grounding.
1
2
