GaAs IC 1 Bit Digital Attenuator
10 dB LSB DC–2.5 GHz
AA103-72
Features
s
Attenuation Cutback of 10 dB
s
Single Positive 3 V Control
s
Low Loss
s
Low Cost SOT-5 Plastic Package
PIN 1
0.020 (0.51 mm)
0.014 (0.35 mm)
0.012
(0.30 mm)
0.000
(0.00 mm)
MIN.
0.064 (1.63 mm)
0.035 (0.90 mm)
SOT-5
0.074
(1.90 mm)
REF.
0.069
(1.75 mm)
0.052
(1.30 mm)
0.118
(3.00 mm)
0.087
(2.20 mm)
Description
The AA103-72 is a 1 bit GaAs IC FET digital attenuator
in a low cost package. This attenuator has an LSB of
10 dB. The AA103-72 is particularly suited where high
attenuation accuracy, low insertion loss and low
intermodulation products are required. Typical applications
include cellular radio, wireless data, and wireless local loop
gain level control circuits.
0.037 (0.95 mm) REF.
0.012 (0.30 mm) TYP.
0.024
(0.61 mm)
0.004
(0.10 mm)
0.122 (3.10 mm)
0.106 (2.70 mm)
0.0104 (0.26 mm)
0.0035 (0.09 mm) MIN.
Electrical Specifications at 25°C (0, +3 V)
Parameter
1
Insertion
Loss
2
Frequency
DC–0.5 GHz
DC–1.0 GHz
DC–2.5 GHz
DC–1.0 GHz
DC–2.5 GHz
VSWR (I/O)
DC–2.5 GHz
Min.
Typ.
0.3
0.3
0.4
10
± (0.25 + 3% of
Attenuation Setting in dB)
± (0.4 + 5% of
Attenuation Setting in dB)
1.2:1
1.4:1
Max.
0.5
0.6
0.7
Unit
dB
dB
dB
dB
dB
dB
Attenuation Range
Attenuation
Accuracy
3
Operating Characteristics at 25°C (0, +3 V)
Parameter
Switching
Characteristics
4, 5
Condition
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 +10 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
Frequency
Min.
Typ.
150
300
70
+20
+26
+41
+45
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
V
Low
= 0 to 0.2 V
V
High
= +3 V @ 25
µA
Typ. to +5 V @ 50
µA
Typ.
1. All measurements made in a 50
Ω
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Maximum attenuation includes insertion loss.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
5. Switching characteristics will vary with value chosen for C
BP
.
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 04/00A
1
ALPHA [ ALPHA INDUSTRIES ]
