GaAs 50 dB IC Voltage Variable
Dual Control Attenuator DC–3 GHz
AT002N5-00
Features
s
50 dB Range
s
Low Insertion Loss
s
Fast Switching
s
Meets MIL-STD-883 Screening
Requirements
1.230
GND
1.076
Chip Outline
0.349
0.570
0.793
V
1
(ALT.)
V
2
(ALT.)
0.981
GND
1.072
Description
The AT002N5-00 attenuator provides up to 50 dB variable
attenuation from DC–3 GHz under non-reflective
conditions. Attenuation can be controlled by varying each
of the two control bias voltages from 0 to -5 V. The control
current is less than 100
µA
and the attenuator will operate
at 0 dBm with switching time, typically 10 ns. The chip is
configured using two “T” attenuators in the series and two
in parallel. This device may be used with a single bias
(V
1
= 0) but with reduced attenuation and match.
Applications include fast response AGC circuits requiring
high attenuation, such as for radar processing,
instrumentation, and levelers in RF equipment.
0.614
J
1
J
2
0.152
0.000
0.000
0.157
GND
0.159
V
1
0.348
0.569
V
2
0.792
GND
0.981
1.140
Electrical Specifications at 25°C
Parameter
1
Insertion Loss
Dimensions indicated in mm.
All bonding pads are 0.1 x 0.1 mm.
Chip thickness = 0.2 mm.
Frequency
2
DC–1.0 GHz
DC–2.0 GHz
DC–3.0 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–3.0 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–3.0 GHz
Min.
Typ.
1.2
1.6
1.8
Max.
1.4
1.8
2.0
Unit
dB
dB
dB
dB
dB
dB
Attenuation Range
50
48
45
52
50
48
1.3:1
1.5:1
1.8:1
VSWR (I/O)
Operating Characteristics at 25°C
Parameter
Switching Characteristics
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
0–10
11–20
21–30
31–40
41–50
1.0 dB
> 500 MHz
V
Low
= 0 to -0.2 V @ 20 µA Max.
V
High
= -5 V @ 100 µA Max.
2. DC = 300 kHz.
Frequency
Min.
Typ.
10
15
20
Max.
Unit
ns
ns
mV
dB
dB
dB
dB
dB
dBm
dBm
Attenuation Flatness
DC–3 GHz
±0.25
±0.50
±1.00
±2.00
±4.00
-4
0
Compression Point for all
Attenuation Levels
Control Voltages
50 MHz–3 GHz
1. All measurements made in a 50
Ω
system, unless otherwise specified.
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 3/99A
1
ALPHA [ ALPHA INDUSTRIES ]
