
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
1
GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB Positive Control 0.5–2.5 GHz
Features
I
Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
I
Single Positive Control (+3 to +5 V) for
Each Bit
I
Low DC Power Consumption
I
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, positive supply voltage (V
S
) and
five individual bit control voltages (V
1
–V
5
).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
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
Min.
Typ.
1.9
2.4
2.8
15.5
Max.
2.3
2.7
3.1
Unit
dB
dB
dB
dB
Insertion Loss
Attenuation Range
Attenuation Accuracy
2
0.5–1.0 GHz
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.3 + 5% of
Attenuation Setting in dB)
1.5:1
125
250
75
+20
+24
+24
+30
dB
1.0–2.5 GHz
dB
VSWR (I/O)
3
Switching Characteristics
4
0.5–2.5 GHz
2.0:1
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
V
S
= +3 V
V
S
= +5 V
For Two-tone Input Power +5 dBm
V
S
= +3 V
V
S
= +5 V
V
Low
= 0 to 0.2 V @ 20 μA Max.
V
High
= +3 V @ 100 μA Max. to +5 V @ 200 μA Max.
V
S
= V
High
± 0.2 V
ns
ns
mV
dBm
dBm
Input Power for 1 dB Compression
0.5–2.5 GHz
0.5–2.5 GHz
Intermodulation Intercept Point (IP3)
0.5–2.5 GHz
0.5–2.5 GHz
+42
+43
+48
+49
dBm
dBm
Control Voltages
Electrical Specifications at -40°C to +85°C (0, +5 V)
0.197 (5.00 mm)
0.189 (4.80 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.025
(0.635 mm) TYP.
PIN 1
PIN 16
0.244 (6.20 mm)
0.228 (5.80 mm)
0.068
(1.73 mm) MAX.
0.0196 X 45
CHAMFER
R 0.008
MIN.
0.010
(0.25 mm) TYP.
0.010 (0.25 mm)
0.004 (0.10 mm)
0.0098
(0.0075 mm)
8 MAX.
5
-15
R 0.013/0.008
1. All measurements made in a 50
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.