GaAs 4 Bit Digital Attenuator
2, 4, 8, 16 dB Bits DC–2 GHz
AT002D4-31
Features
■
Low DC Power Consumption
■
Attenuation in 2 dB Steps to 30 dB with
High Accuracy
■
14 Lead Hermetic Surface Mount Package
■
Capable of Meeting MIL-STD
Requirements
6
0.017 (0.43 mm)
0.500 (12.70 mm) MAX.
-31
ORIENTATION
MARK
0.270 (6.86 mm) MAX.
0.050 (1.27 mm)
0.395 (10.03 mm)
MAX.
Description
The AT002D4-31 is an MMIC FET digital attenuator
consisting of four monolithic attenuators with an LSB of
2 dB and a total attenuation of 30 dB with all attenuators
connected. This attenuator is recommended for fast
response, low power consumption AGC circuits. Typical
applications include AGC circuits for radar processing,
instrumentation and levelers in RF equipment.
0.070 (1.78 mm)
0.040 (1.02 mm)
0.006 (0.15 mm)
0.004 (0.10 mm)
0.075 (1.91 mm) MAX. 0.340 (8.64 mm)
0.315 (8.00 mm)
0.038 (0.97 mm)
0.025 (0.64 mm)
Electrical Specifications at 25°C
Parameter
1
Insertion
Loss
2
Frequency
5
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–1.0 GHz
DC–2.0 GHz
VSWR
DC–0.5 GHz
DC–2.0 GHz
28
26
Min.
Typ.
2.6
3.3
5.0
30
30
Max.
3.0
3.9
5.8
Unit
dB
dB
dB
dB
dB
Attenuation Range
3
Attenuation Accuracy Per Bit
± (0.4 + 5% of Attenuation
Setting in dB)
± (0.5 + 5% of Attenuation
Setting in dB)
1.3:1
1.6:1
1.5:1
1.8:1
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
4
0.5–2 GHz
For Two-tone Input Power 13 dBm
V
Low
= 0 to -0.2 V @ 20 µA Max.
V
High
= -5 V @ 50 µA to -9 V @ 200 µA Max.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
5. DC = 300 kHz.
6. See Quality/Reliability section.
Frequency
Min.
Typ.
7
14
20
27
43
32
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
0.5–2 GHz
0.001–0.5 GHz
1. All measurements made in a 50
Ω
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation value referenced above insertion loss.
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[978] 241-7906
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 9/01A
1
ALPHA [ ALPHA INDUSTRIES ]
