Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 10/99A
GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB Positive Control 0.5–2.0 GHz
Features
a73 Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
a73 Single Positive Control (+3 to +5 V) for
Each Bit
a73 Low DC Power Consumption
a73 Miniature Low Cost MSOP-10
Plastic Package
MSOP-10
AA106-86
PIN 10
PIN 1
PIN 1
INDICATOR
0.034
(0.86 mm)
± 0.004
(0.10 mm)
0.118 (3.00 mm)
± 0.006 (0.15 mm)
0.193
(4.90 mm)
± 0.006
(0.15 mm)
0˚–6˚
8˚–16˚
0.118 (3.00 mm)
± 0.006 (0.15 mm)
0.022 (0.55 mm)
± 0.006 (0.15 mm)
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.0197
(0.500 mm)
BSC
0.009 (0.23 mm)
REF.
0.043
(1.09 mm)
MAX.
Description
The AA106-86 is a 5 bit, single positive control GaAs IC
FET digital attenuator in a low cost MSOP-10 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
). The AA106-86 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.
Parameter
1
Frequency Min. Typ. Max. Unit
Insertion Loss
2
0.5–1.0 GHz 2.0 2.4 dB
1.0–2.0 GHz 3.0 3.4 dB
Attenuation Range 15.5 dB
Attenuation Accuracy
3
0.5–1.0 GHz ± (0.2 + 3% of dB
Attenuation Setting in dB)
1.0–2.0 GHz ± (0.3 + 5% of dB
Attenuation Setting in dB)
VSWR (I/O) 0.5–2.0 GHz 1.5:1 2.0:1
Electrical Specifications at 25°C (0, +3 V), (0, +5 V)
Parameter Condition Frequency Min. Typ. Max. Unit
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF) 150 ns
On, Off (50% CTL to 90/10% RF) 300 ns
Video Feedthru 70 mV
Input Power for 1 dB Compression V
S
= +3 V 0.9–2.0 GHz +21 dBm
V
S
= +5 V 0.9–2.0 GHz +27 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
V
S
= +3 V 0.9–2.0 GHz +41 dBm
V
S
= +5 V 0.9–2.0 GHz +45 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.
V
S
= V
High
± 0.2 V
Operating Characteristics at 25°C (0, +5 V)
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation referenced to insertion loss.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.