AT002D8-31 View Datasheet(PDF) - Alpha Industries
Part Name
Description
Manufacturer
AT002D8-31 Datasheet PDF : 2 Pages
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GaAs 4 Bit Digital Attenuator
1, 2, 4, 8 dB Bits DC–2 GHz
Features
s Low DC Power Consumption
s Attenuation in 1 dB Steps to 15 dB with
High Accuracy
s 14 Lead Hermetic Surface Mount Package
s Capable of Meeting MIL-STD
Requirements6
Description
The AT002D8-31 is an MMIC FET digital attenuator
consisting of four monolithic attenuators with an LSB of
1 dB and a total attenuation of 15 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.
Electrical Specifications at 25°C
Insertion Loss2
Parameter1
Attenuation Range3
Attenuation Accuracy Per Bit
VSWR
-31
ORIENTATION
MARK
0.050 (1.27 mm)
AT002D8-31
0.270 (6.86 mm) MAX.
0.395 (10.03 mm)
MAX.
0.017 (0.43 mm)
0.500 (12.70 mm) MAX.
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)
Frequency5
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.0 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–0.5 GHz
DC–2.0 GHz
Min.
Typ.
Max. Unit
2.0
2.5
dB
2.7
3.0
dB
3.5
4.0
dB
15
dB
± (0.25 + 3% of Attenuation dB
Setting in dB)
± (0.4 + 5% of Attenuation
dB
Setting in dB)
1.2:1
1.4:1
1.5:1
1.8:1
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 Feedthru4
10
ns
20
ns
20
mV
Input Power for 1 dB Compression
0.5–2 GHz
0.001 GHz
27
dBm
17
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power 13 dBm
0.5–2 GHz
43
dBm
0.001–0.5 GHz
32
dBm
Control Voltages
VLow = 0 to -0.2 V @ 20 µA Max.
VHigh = -5 V @ 50 µA to -9 V @ 200 µA Max.
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation referenced to insertion loss.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
5. DC = 300 kHz.
6. See Quality/Reliability section.
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
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