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 0.52.0 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 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)
06
816
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
0.51.0 GHz
2.0
2.4
dB
1.02.0 GHz
3.0
3.4
dB
Attenuation Range
15.5
dB
Attenuation Accuracy
3
0.51.0 GHz
(0.2 + 3% of
dB
Attenuation Setting in dB)
1.02.0 GHz
(0.3 + 5% of
dB
Attenuation Setting in dB)
VSWR (I/O)
0.52.0 GHz
1.5:1
2.0:1
Electrical Specifications at 25C (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
0.92.0 GHz
+21
dBm
V
S
= +5 V
0.92.0 GHz
+27
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
V
S
= +3 V
0.92.0 GHz
+41
dBm
V
S
= +5 V
0.92.0 GHz
+45
dBm
Control Voltages
V
Low
= 0 to 0.2 V @ 20 A Max.
V
High
= +3 V @ 100 A Max. to +5 V @ 200 A Max.
V
S
= V
High
0.2 V
Operating Characteristics at 25C (0, +5 V)
1. All measurements made in a 50
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.
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
Specifications subject to change without notice. 10/99A
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.52.0 GHz
AA106-86
8 dB
4 dB
2 dB
1 dB
0.5 dB
V
4
V
5
V
3
V
2
J
1
GND
GND
GND
V
1
J
2
V
S
C
BL
C
BL
10 k
1
10
2
9
3
8
4
7
5
6
Pin Out
Insertion Loss vs. Frequency
Frequency (GHz)
Insertion Loss (dB)
-3.5
-4.0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0
0.5
1.0
1.5
2.0
2.5
J
1
J
2
Frequency (GHz)
Attenuation Accuracy vs. Frequency
0
0.5
1.0
1.5
2.0
2.5
Deviation from Nominal
Attenuation (dB)
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
VSWR vs. Frequency
Frequency (GHz)
VSWR
1.0
1.2
1.4
1.6
1.8
2.0
0
0.5
1.0
1.5
2.0
2.5
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency
-10
-5
0
5
10
15
20
25
30
0
0.5
1.0
1.5
2.0
2.5
Deviation from Nominal
Insertion Phase (Deg.)
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Typical Performance Data (0, +5 V)
V
High
= +3 to +5 V (V
S
= V
High
0.2 V).
V
1
V
2
V
3
V
4
V
5
Attenuation
8 dB
4 dB
2 dB
1 dB
0.5 dB
J
1
J
2
V
High
V
High
V
High
V
High
V
High
Reference I.L.
V
High
V
High
V
High
V
High
0
0.5 dB
V
High
V
High
V
High
0
V
High
1 dB
V
High
V
High
0
V
High
V
High
2 dB
V
High
0
V
High
V
High
V
High
4 dB
0
V
High
V
High
V
High
V
High
8 dB
0
0
0
0
0
15.5 dB Max. Atten.
Truth Table
DC blocking capacitors (C
BL
) and biasing resistor must be supplied
externally for positive voltage operation.
C
BL
= 47 pF for operation >500 MHz.
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
3
Specifications subject to change without notice. 10/99A
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.52.0 GHz
AA106-86
Insertion Loss vs. Frequency
Frequency (GHz)
Insertion Loss (dB)
-3.5
-4.0
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
J
1
J
2
0
0.5
1.0
1.5
2.0
2.5
Frequency (GHz)
Attenuation Accuracy vs. Frequency
0
0.5
1.0
1.5
2.0
2.5
Deviation from Nominal
Attenuation (dB)
-0.8
-0.7
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
VSWR vs. Frequency
Frequency (GHz)
VSWR
0
0.5
1.0
1.5
2.0
2.5
1.0
1.2
1.4
1.6
1.8
2.0
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency
-10
-5
0
5
10
15
20
25
30
0
0.5
1.0
1.5
2.0
2.5
Deviation from Nominal
Insertion Phase (Deg.)
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Typical Performance Data (0, +3 V)
Characteristic
Value
RF Input Power
1 W > 500 MHz 0/8 V
0.5 W @ 50 MHz 0/8 V
Supply Voltage
+8 V
Control Voltage
-0.2 V, +8 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Absolute Maximum Ratings
Note: Exceeding these parameters may cause irreversible damage.
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