GaAs 30 dB IC Voltage Variable Dual
Control Attenuator DC–8 GHz
AT006N3-93
Features
-93
I Dual Control Voltages
0.160
0.140
I Low Insertion Loss
I Broadband DC–8 GHz
0.100
0.060
I Small Low Cost “Chip on Board” Package
Description
0.020
0.000
The AT006N3-93 GHz GaAs FET IC non-reflective
bridged “T” attenuator provides up to 30 dB of “non-
reflective” attenuation. The control voltage requirements
are 0 to -5 V.
0.056
This attenuator has two independent voltage controls,
which must be adjusted in a prescribed manner to obtain
the desired attenuation under non-reflective conditions.
Refer to the Application Notes section, “Dual Voltage
Controlled VVA.”
Applications for these fast attenuators are AGC circuits
and variable level control in various military and
telecommunications systems.
Electrical Specifications at 25°C
1
4
Parameter
Frequency
Min.
Typ.
Max.
Unit
2
Insertion Loss
DC–2.0 GHz
DC–4.0 GHz
DC–6.0 GHz
DC–8.0 GHz
0.8
1.0
1.2
1.9
1.0
1.2
1.4
2.0
dB
dB
dB
dB
Attenuation Range
VSWR (I/O)
DC–2.0 GHz
DC–4.0 GHz
DC–6.0 GHz
DC–8.0 GHz
30
29
26
24
35
33
30
28
dB
dB
dB
dB
DC–2.0 GHz
DC–4.0 GHz
DC–8.0 GHz
1.25:1
1.40:1
1.50:1
1.3:1
1.5:1
1.6:1
Operating Characteristics at 25°C
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
7
10
20
ns
ns
mV
3
Input Power for 1 dB Compression
Control Voltages
For All Attenuation Levels
0.5–6 GHz
0.05 GHz
0
-3
dBm
dBm
VLow = 0 to -0.2 V @ 20 µA Max.
VHigh = -5 V @ 50 µA Max.
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
4. DC = 300 kHz.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
1
Specifications subject to change without notice. 9/99A