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Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
1
Specifications subject to change without notice. 12/00A
GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB Positive Control 0.52.5 GHz
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
AA102-80
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.
Parameter
1
Condition
Frequency
Min.
Typ.
Max.
Unit
Insertion Loss
0.51.0 GHz
1.9
2.3
dB
1.02.0 GHz
2.4
2.7
dB
2.02.5 GHz
2.8
3.1
dB
Attenuation Range
15.5
dB
Attenuation Accuracy
2
0.51.0 GHz
(0.2 + 3% of
Attenuation Setting in dB)
dB
1.02.5 GHz
(0.3 + 5% of
Attenuation Setting in dB)
dB
VSWR (I/O)
3
0.52.5 GHz
1.5:1
2.0:1
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF)
125
ns
On, Off (50% CTL to 90/10% RF)
250
ns
Video Feedthru
75
mV
Input Power for 1 dB Compression
V
S
= +3 V
0.52.5 GHz
+20
+24
dBm
V
S
= +5 V
0.52.5 GHz
+24
+30
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
V
S
= +3 V
0.52.5 GHz
+42
+48
dBm
V
S
= +5 V
0.52.5 GHz
+43
+49
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
Electrical Specifications at -40C to +85C (0, +5 V)
0.197 (5.00 mm)
0.189 (4.80 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.025
(0.635 mm) TYP.
PIN 1
PIN 16
0.244 (6.20 mm)
0.228 (5.80 mm)
0.068
(1.73 mm) MAX.
0.0196 X 45
CHAMFER
0.010
(0.25 mm) TYP.
0.010 (0.25 mm)
0.004 (0.10 mm)
0.0098
(0.0075 mm)
8 MAX.
5 -15
R 0.013/0.008
R 0.008
MIN.
1. All measurements made in a 50
system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
3. Input/output.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.52.5 GHz
AA102-80
2
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
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
0
0.5
1.0
1.5
2.0
2.5
3.0
-2.75
-2.50
-2.25
-2.00
-1.75
-1.50
-1.25
-1.00
+25C
+85C
-40C
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
44
46
48
50
52
54
56
58
6
5
4
3
2
1
0
7 8 9 10 11 12 13 14 15
+25C
-85C
-40C
VSWR
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
VSWR vs. Frequency (25C)
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Ins. Loss
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
VSWR
Frequency (GHz)
VSWR vs. Frequency (85C)
0
0.5
1.0
1.5
2.0
2.5
3.0
1.00
1.25
1.50
1.75
2.00
2.25
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
VSWR
Frequency (GHz)
VSWR vs. Frequency (-40C)
0
0.5
1.0
1.5
2.0
2.5
3.0
1.00
1.25
1.50
1.75
2.00
2.25
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Typical Performance Data (0, +5 V)
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation
Control
Input Power @ 1 dB Compression
State
Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm)
Ins. Loss
5
30.7
30.1
30.1
0.5
5
31.6
31.1
31.1
1.0
5
31.0
30.5
30.2
2.0
5
31.4
30.9
30.5
4.0
5
36.8
36.8
36.8
8.0
5
27.4
33.8
27.1
15.5
5
32.9
31.2
33.3
Frequency = 0.52.5 GHz
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.52.5 GHz
AA102-80
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
3
Specifications subject to change without notice. 12/00A
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (25C)
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (85C)
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (25C)
-20
-10
0
10
20
30
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (85C)
-20
-10
0
10
20
30
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40C)
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (-40C)
-20
-10
0
10
20
30
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.52.5 GHz
AA102-80
4
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
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
0
0.5
1.0
1.5
2.0
2.5
3.0
-2.75
-2.50
-2.25
-2.00
-1.75
-1.50
-1.25
-1.00
+25C
+85C
-40C
VSWR vs. Frequency (25C)
VSWR
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (25C)
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (85C)
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (25C)
-20
-15
-10
-5
0
5
10
15
20
25
30
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40C)
0
0.5
1.0
1.5
2.0
2.5
3.0
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Typical Performance Data (0, +3 V)
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB Positive Control 0.52.5 GHz
AA102-80
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
5
Specifications subject to change without notice. 12/00A
Characteristic
Value
RF Input Power
2 W > 500 MHz 0/8 V
0.75 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.
V
High
= +3 to +5 V (V
S
= V
High
0.2 V).
DC blocking capacitors (C
BL
) and biasing resistor must be supplied externally
for positive voltage operation.
C
BL
= 47 pF for operation >500 MHz.
12
3
4
5
6
8
16
15
14
13
12
11
9
7
10
V
5
V
4
V
3
V
2
J
1
GND
GND
GND
GND
GND
GND
GND
GND
GND
V
1
J
2
C
BL
C
BL
V
S
10 k
8 dB
4 dB
2 dB
1 dB
0.5 dB
Pin Out
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
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
44
46
48
50
52
54
56
58
60
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+25C
+85C
-40C
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation
Control
Input Power @ 1 dB Compression
State
Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm)
Ins. Loss
3
24.1
23.7
24.1
0.5
3
24.4
24.0
25.0
1.0
3
24.4
23.8
24.3
2.0
3
24.7
24.1
24.5
4.0
3
36.8
36.8
36.8
8.0
3
26.7
26.8
29.6
15.5
3
27.1
25.6
28.7
Frequency = 0.52.5 GHz
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