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
GaAs 30 dB IC Voltage Variable Dual
Control Attenuator DC–8 GHz
Features
a73 Dual Control Voltages
a73 Low Insertion Loss
a73 Broadband DC–8 GHz
a73 Small Low Cost “Chip on Board” Package
AT006N3-93
Description
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.
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.
Parameter
1
Frequency
4
Min. Typ. Max. Unit
Insertion Loss
2
DC–2.0 GHz 0.8 1.0 dB
DC–4.0 GHz 1.0 1.2 dB
DC–6.0 GHz 1.2 1.4 dB
DC–8.0 GHz 1.9 2.0 dB
Attenuation Range DC–2.0 GHz 30 35 dB
DC–4.0 GHz 29 33 dB
DC–6.0 GHz 26 30 dB
DC–8.0 GHz 24 28 dB
VSWR (I/O) DC–2.0 GHz 1.25:1 1.3:1
DC–4.0 GHz 1.40:1 1.5:1
DC–8.0 GHz 1.50:1 1.6:1
Electrical Specifications at 25°C
-93
0.056
0.000
0.000 0.140
0.160
0.020
0.060
0.100
0.140
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.
Parameter Condition Frequency Min. Typ. Max. Unit
Switching Characteristics Rise, Fall (10/90% or 90/10% RF) 7 ns
On, Off (50% CTL to 90/10% RF) 10 ns
Video Feedthru
3
20 mV
Input Power for 1 dB Compression For All Attenuation Levels 0.5–6 GHz 0 dBm
0.05 GHz -3 dBm
Control Voltages V
Low
= 0 to -0.2 V @ 20 µA Max.
V
High
= -5 V @ 50 µA Max.
Operating Characteristics at 25°C