Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 3/99A
GaAs 30 dB IC Voltage Variable Dual
Control Attenuator DC–6 GHz
Features
a73 30 dB Range
a73 Low DC Drain
a73 Fast Switching
a73 Capable of Meeting MIL-STD
Requirements
5
Chip Outline
AT006N3-00
Description
The AT006N3-00 chip is a GaAs FET MMIC non-reflective
bridged “T” attenuator that provides over 30 dB of
“matched” attenuation.The input and output VSWR is less
than 1.5:1 maximum under all attenuation values.
Applications for these fast attenuators are AGC circuits
and variable level control in high reliability and
telecommunications systems.
0.000
0.000
0.940
0.601
1.115
0.840
0.100
0.100 0.556 1.014
0.319 0.793
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.
5. See Quality/Reliability section.
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
Attenuation Flatness 0–10 dB DC–6 GHz ±0.5 dB
11–20 dB ±1.0 dB
21–30 dB ±1.5 dB
31–Max. ±2.0 dB
Compression Point for all Attenuation 0.1 dB -8 (-4) dBm
Levels 50 MHz (> 500 MHz) 1.0 dB -3 (0) 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
Parameter
1
Frequency
4
Min. Typ. Max. Unit
Insertion Loss
2
DC–1.0 GHz 0.8 1.0 dB
DC–2.0 GHz 1.0 1.2 dB
DC–4.0 GHz 1.2 1.4 dB
DC–6.0 GHz 1.5 1.7 dB
Attenuation Range DC–1.0 GHz 30 38 dB
DC–2.0 GHz 29 35 dB
DC–4.0 GHz 26 32 dB
DC–6.0 GHz 25 30 dB
VSWR (I/O) DC–2.0 GHz 1.2:1 1.3:1
DC–4.0 GHz 1.4:1 1.5:1
DC–6.0 GHz 1.5:1 1.6:1
Electrical Specifications at 25°C
Dimensions indicated in mm.
All DC (V) pads are 0.1 x 0.1 mm and RF In, Out pads are 0.07 mm wide.
Chip thickness = 0.1 mm.