ALPHA AA102-80 Datasheet
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 12/00A
GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB Positive Control 0.5–2.5 GHz
Features
■ Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
■ Single Positive Control (+3 to +5 V) for
Each Bit
■ Low DC Power Consumption
■ Small Low Cost SSOP-16 Plastic Package
SSOP-16
AA102-80
Description
The AA102-80 is a 5 bit, single positive control GaAs IC
FET digital attenuator in a low cost SSOP-16 package.
This attenuator has an LSB of 0.5 dB and a total
attenuation of 15.5 dB.The attenuator requires external
DC blocking capacitors, positiv e supply voltage (VS) and
five individual bit control voltages (V1–V5).It is particularly
suited where high attenuation accuracy, low insertion loss
and low intermodulation products are required. Typical
applications include base station, wireless data, and
wireless local loop gain level control circuits.
Parameter
1
Condition Frequency Min. Typ. Max. Unit
Insertion Loss 0.5–1.0 GHz 1.9 2.3 dB
1.0–2.0 GHz 2.4 2.7 dB
2.0–2.5 GHz 2.8 3.1 dB
Attenuation Range 15.5 dB
Attenuation Accuracy
2
0.5–1.0 GHz ± (0.2 + 3% of
Attenuation Setting in dB) dB
1.0–2.5 GHz ± (0.3 + 5% of
Attenuation Setting in dB) dB
VSWR (I/O)
3
0.5–2.5 GHz 1.5:1 2.0:1
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF) 125 ns
On, Off (50% CTL to 90/10% RF) 250 ns
Video Feedthru 75 mV
Input Power for 1 dB Compression VS= +3 V 0.5–2.5 GHz +20 +24 dBm
VS= +5 V 0.5–2.5 GHz +24 +30 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
V
S
= +3 V 0.5–2.5 GHz +42 +48 dBm
VS= +5 V 0.5–2.5 GHz +43 +49 dBm
Control Voltages V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= +3 V @ 100 µA Max.to +5 V @ 200 µA Max.
VS= V
High
± 0.2 V
Electrical Specifications at -40°C to +85°C (0, +5 V)
1.All measurements made in a 50 Ω system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
3. Input/output.
4.Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
(0.635 mm) TYP.
0.244 (6.20 mm)
0.228 (5.80 mm)
(1.73 mm) MAX.
0.010
(0.25 mm) TYP.
0.068
0.025
PIN 16
PIN 1
0.0196 X 45˚
MIN.
0.010 (0.25 mm)
0.004 (0.10 mm)
CHAMFER
R 0.013/0.008R 0.008
5˚ -15˚
0.197 (5.00 mm)
0.189 (4.80 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.0098
(0.0075 mm)
8˚ MAX.
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.5–2.5 GHz AA102-80
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 12/00A
)
y
0
0.51.01.52.02.5
3.0
5
50
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
44
46
48
50
52
54
56
58
6543210 7 8 9 10 11 12 13 14
15
+25˚C
-85˚C
-40˚C
Typical Performance Data (0, +5 V)
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation Control
Input Power @ 1 dB Compression
State Voltage (V)+25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss 5 30.7 30.1 30.1
0.5 5 31.6 31.1 31.1
1.0 5 31.0 30.5 30.2
2.0 5 31.4 30.9 30.5
4.0 5 36.8 36.8 36.8
8.0 5 27.4 33.8 27.1
15.5 5 32.9 31.2 33.3
Frequency = 0.5–2.5 GHz
-1.00
-1.25
-1.50
-1.75
-2.00
-2.25
Insertion Loss (dB)
-2.
-40˚C
+85˚C
+25˚C
2.50
2.25
2.00
1.75
VSWR
1.50
1.25
31 dB
16 dB
8 dB
4 dB
2 dB
1 dB
Ins. Loss
-2.7
Frequency (GHz
Insertion Loss vs. Frequenc
1.00
0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
VSWR vs. Frequency (25˚C)
2.25
2.00
1.75
VSWR
1.50
1.25
1.00
15.5 dB
8 dB
4 dB
2 dB
0 0.5 1.0 1.5 2.0 2.5 3.0
1 dB
Ins. Loss
Frequency (GHz)
VSWR vs. Frequency (85˚C)
2.25
15.5 dB
2.00
1.75
VSWR
1.50
1.25
1.00
0 0.5 1.0 1.5 2.0 2.5 3.0
8 dB
Ins. Loss
4 dB
2 dB
1 dB
Frequency (GHz)
VSWR vs. Frequency (-40˚C)
0.5 dB
0.5 dB
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