GaAs IC 4 Bit Digital Attenuator
1 dB LSB Positive Control 0.5–3.0 GHz
AA105-86
Features
s
Attenuation 1 dB Steps to 15 dB
with High Accuracy
s
Single Positive Control (+3 to +5 V) for
Each Bit
s
Low DC Power Consumption
s
Miniature Low Cost MSOP-10
Plastic Package
MSOP-10
PIN 10
PIN 1
INDICATOR
0.118 (3.00 mm)
± 0.006 (0.15 mm)
0.193
(4.90 mm)
± 0.006
(0.15 mm)
PIN 1
0.034
(0.86 mm)
± 0.004
(0.10 mm)
0.118 (3.00 mm)
± 0.006 (0.15 mm)
8˚–16˚
0˚–6˚
0.0197
(0.500 mm)
BSC
Description
The AA105-86 is a 4 bit, single positive control GaAs IC
FET digital attenuator. It requires DC blocking capacitors,
positive supply voltage (V
S
) and four individual positive bit
control voltages (V
1
–V
4
). The AA105-86 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.
0.009 (0.23 mm)
REF.
0.043
(1.09 mm)
MAX.
0.022 (0.55 mm)
± 0.006 (0.15 mm)
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
Electrical Specifications at -40°C to +85°C (0, +5 V)
Parameter
1
Insertion Loss
Condition
Frequency
0.5–1.0
1.0–2.0
2.0–2.5
2.5–3.0
GHz
GHz
GHz
GHz
Min.
Typ.
1.5
2.1
2.4
2.7
15
0.5–1.0 GHz
1.0–3.0 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
0.5–3.0 GHz
0.5–3.0 GHz
0.5–3.0 GHz
0.5–3.0 GHz
+20
+25
+43
+44
0.5–2.5 GHz
2.5–3.0 GHz
± (0.2 + 2% of
Attenuation Setting in dB)
± (0.3 + 3% of
Attenuation Setting in dB)
1.5:1
1.7:1
180
270
50
+24
+29
+49
+50
2.0:1
2.2:1
ns
ns
mV
dBm
dBm
dBm
dBm
Max.
1.8
2.4
2.7
3.0
Unit
dB
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. 9/00A
1
ALPHA [ ALPHA INDUSTRIES ]
