GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB Positive Control 0.5–2.5 GHz
AA102-80
Features
s
Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
s
Single Positive Control (+3 to +5 V) for
Each Bit
s
Low DC Power Consumption
s
Small Low Cost SSOP-16 Plastic Package
SSOP-16
0.025
(0.635 mm) TYP.
PIN 16
0.244 (6.20 mm)
0.228 (5.80 mm)
PIN 1
0.0196 X 45˚
CHAMFER
R 0.008
MIN.
R 0.013/0.008
0.0098
(0.0075 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.197 (5.00 mm)
0.189 (4.80 mm)
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.
0.068
(1.73 mm) MAX.
5˚ -15˚
0.010
(0.25 mm) TYP.
0.010 (0.25 mm)
0.004 (0.10 mm)
8˚ MAX.
Electrical Specifications at -40°C to +85°C (0, +5 V)
Parameter
1
Insertion Loss
Condition
Frequency
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
0.5–1.0 GHz
1.0–2.5 GHz
VSWR (I/O)
3
Switching Characteristics
4
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
0.5–2.5 GHz
0.5–2.5 GHz
0.5–2.5 GHz
0.5–2.5 GHz
+20
+24
+42
+43
0.5–2.5 GHz
Min.
Typ.
1.9
2.4
2.8
15.5
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.3 + 5% of
Attenuation Setting in dB)
1.5:1
125
250
75
+24
+30
+48
+49
2.0:1
ns
ns
mV
dBm
dBm
dBm
dBm
Max.
2.3
2.7
3.1
Unit
dB
dB
dB
dB
dB
dB
Attenuation Range
Attenuation Accuracy
2
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
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.
V
S
= V
High
± 0.2 V
3. Input/output.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
1. All measurements made in a 50
Ω
system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
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
ALPHA [ ALPHA INDUSTRIES ]
