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Skyworks Solutions, Inc. [781] 376-3000
Fax [781] 376-3100 Email sales@skyworksinc.com www.skyworksinc.com
1
Specifications subject to change without notice. 11/00A
GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB DC–2 GHz
Features
■ Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
■ Low DC Power Consumption
■ Low Cost SOIC-16 Plastic Package
SOIC-16
AA280-25
(Previously AD280-25)*
0.158 (4.00 mm)
0.150 (3.80 mm)
0.068
(1.73 mm) MAX.
0.244 (6.20 mm)
0.228 (5.80 mm)
0.049 (1.24 mm)
0.016 (0.41 mm)
0.016 MAX.
(0.41 mm)
x 45
CHAMFER
0.020 (0.51 mm)
0.013 (0.33 mm)
0.050
(1.27 mm) BSC
PIN 16
PIN 1
INDICATOR
0.394 (10.00 mm)
0.386 (9.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.0098 (0.25 mm)
0.0075 (0.19 mm)
8 MAX.
Description
The AA280-25 is a 5 bit, GaAs IC FET digital attenuator
in a low cost SOIC-16 package. This attenuator has an
LSB of 0.5 dB and a total attenuation of 15.5 dB. The
AA280-25 is particularly suited where high attenuation
accuracy, low insertion loss and low intermodulation
products are required. Typical applications include
cellular radio, wireless data, wireless local loop and other
gain level control circuits.
Parameter1
Condition
Frequency2
Min.
Typ.
Max.
Unit
Insertion Loss3
DC–0.5 GHz
1.1
1.3
dB
DC–1.0 GHz
1.4
1.7
dB
DC–2.0 GHz
1.7
2.0
dB
Attenuation Range
15.5
dB
Attenuation Accuracy3
DC–1.0 GHz
± (0.2 + 3% of
Attenuation Setting in dB)
dB
DC–2.0 GHz
± (0.4 + 3% of
Attenuation Setting in dB)
dB
VSWR (I/O)4
DC–2.0 GHz
1.4:1
1.8:1
Switching Characteristics5
Rise, Fall (10/90% or 90%/10% RF)
15
nS
On, Off (50% CTL to 90%/10% RF)
25
nS
Video Feedthru
25
mV
Input Power for 1 dB Compression
0.5–2.0 GHz
+24
+29
dBm
0.05 GHz
+17
+22
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
0.5–2.0 GHz
+44
+50
dBm
0.05 GHz
+35
+40
dBm
Control Voltages
VLow = 0 to 0.2 V @ 20 A Max.
VHigh = -5 V @ 300 A Max.
Electrical Specifications at -40°C to +85°C (0, -5 V)
1. All measurements made in a 50
system, unless otherwise specified.
2. DC = 300 kHz.
3. Attenuation referenced to insertion loss.
4. Input/Output
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
*Due to conflict with another company’s product numbering system, Skyworks’ attenuator products starting with the letters “AD” are being changed to “AA”.