Page 1
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 10/00A
GaAs IC 5 Bit Digital Attenuator
1 dB LSB Positive Control 0.5–2.5 GHz
Features
■ Attenuation 1 dB Steps to 31 dB
with High Accuracy
■ Single Positive Control (+3 to +5 V) for
Each Bit
■ Low DC Power Consumption
■ Small Low Cost SSOP-16 Plastic Package
SSOP-16
AA101-80
Description
The AA101-80 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 1 dB and a total attenuation
of 31 dB. The attenuator requires external DC blocking
capacitors, positive supply voltage (VS) and five individual
bit control voltages (V1–V5). The AA101-80 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 0.5–1.0 GHz 2.0 2.4 dB
1.0–2.0 GHz 2.6 3.0 dB
2.0–2.5 GHz 2.9 3.3 dB
Attenuation Range 31 dB
Attenuation Accuracy
2
0.5–1.0 GHz ± (0.2 + 3% of Attenuation
Setting in dB) dB
1.0–2.0 GHz ± (0.3 + 5% of Attenuation
Setting in dB) dB
2.0–2.5 GHz ± (0.3 + 6% of Attenuation
Setting in dB) dB
VSWR (I/O)
3
0.5–2.5 GHz 1.5:1 2.2:1
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF) 100 ns
On, Off (50% CTL to 90/10% RF) 300 ns
Video Feedthru 70 mV
Input Power for 1 dB Compression VS= +3 V 0.5–2.5 GHz +18 +21 dBm
VS= +5 V 0.5–2.5 GHz +23 +27 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
VS= +3 V 0.5–2.5 GHz +37 +43 dBm
VS= +5 V 0.5–2.5 GHz +39 +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.
VS= V
High
± 0.2 V
Electrical Specifications at -40°C to +85°C (0, +5 V)
1. All measurements made in a 50 Ω 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.
(0.635 mm) TYP.
0.244 (6.20 mm)
0.228 (5.80 mm)
0.025
0.197 (5.00 mm)
0.189 (4.80 mm)
PIN 16
0.158 (4.00 mm)
0.150 (3.80 mm)
0.068
PIN 1
0.010 (0.25 mm)
0.004 (0.10 mm)
0.0196 X 45˚
CHAMFER
MIN.
5˚ -15˚
R 0.013/0.008R 0.008
0.0098
(0.0075 mm)
8˚ MAX.
(1.73 mm) MAX.
0.010
(0.25 mm) TYP.
Page 2
GaAs IC 5 Bit Digital Attenuator 1 dB LSB Positive Control 0.5–2.5 GHz AA101-80
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 10/00A
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
0 0.5 1.0 1.5 2.0 2.5 3.0
-3.00
-2.75
-2.50
-2.25
-2.00
-1.75
-1.50
-1.25
-1.00
+25˚C
+85˚C
-40˚C
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
40
42
44
46
48
50
52
54
56
58
60
024681012141618202224262830
+25˚C
+85˚C
-40˚C
VSWR
0 0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
VSWR vs. Frequency (25˚C)
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 (85˚C)
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
2.50
Ins. Loss
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
VSWR
Frequency (GHz)
VSWR vs. Frequency (-40˚C)
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
2.50
Ins. Loss
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Typical Performance Data (0, +5 V)
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation Control
Input Power @ 1 dB Compression
State Voltage (V)+25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss 5 29.4 29.2 29.6
1 5 29.3 29.5 29.7
2 5 28.7 28.9 29.0
4 5 34.5 34.3 34.6
8 5 27.4 27.4 27.7
16 5 27.9 27.6 28.2
31 5 27.7 25.2 28.4
Page 3
GaAs IC 5 Bit Digital Attenuator 1 dB LSB Positive Control 0.5–2.5 GHz AA101-80
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 3
Specifications subject to change without notice. 10/00A
0 0.5 1.0 1.5 2.0 2.5 3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (25˚C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (85˚C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (25˚C)
-20
-10
0
10
20
30
40
50
60
70
80
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (85˚C)
-20
-10
0
10
20
30
40
50
60
70
80
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (-40˚C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (-40˚C)
-20
-10
0
10
20
30
40
50
60
70
80
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Page 4
GaAs IC 5 Bit Digital Attenuator 1 dB LSB Positive Control 0.5–2.5 GHz AA101-80
4 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 10/00A
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
0 0.5 1.0 1.5 2.0 2.5 3.0
-3.00
-2.75
-2.50
-2.25
-2.00
-1.75
-1.50
-1.25
-1.00
+25˚C
+85˚C
-40˚C
VSWR vs. Frequency (25˚C)
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
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (25˚C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (85˚C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
16 dB
31 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 (25˚C)
-20
-10
0
10
20
30
40
50
60
70
80
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40˚C)
0 0.5 1.0 1.5 2.0 2.5 3.0
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Typical Performance Data (0, +3 V)
Page 5
GaAs IC 5 Bit Digital Attenuator 1 dB LSB Positive Control 0.5–2.5 GHz AA101-80
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 5
Specifications subject to change without notice. 10/00A
V
High
= +3 to +5 V (VS= V
High
± 0.2 V).
123456 8
16 15 14 13 12 11 9
7
10
16 dB
8 dB
4 dB
2 dB
1 dB
V
5
V
4
V
3
V
2
GND
GND
GND
GND
GND
GND
GND
GND
GND
V
1
J
2
C
BL
V
S
10 kΩ
J
1
C
BL
Pin Out
V
1
V
2
V
3
V
4
V
5
Attenuation
16 dB 8 dB 4 dB 2 dB 1 dB
J1–J
2
V
HighVHighVHigh
V
High
V
High
Reference I.L.
V
HighVHighVHigh
V
High
01 dB
V
HighVHighVHigh
0V
High
2 dB
V
HighVHigh
0V
High
V
High
4 dB
V
High
0V
High
V
High
V
High
8 dB
0V
HighVHigh
V
High
V
High
16 dB
0 0 0 0 0 31 dB Max. Atten.
Truth Table
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 -40°C to +85°C
Storage Temperature -65°C to +150°C
Absolute Maximum Ratings
Note: Exceeding these parameters may cause irreversible damage.
DC blocking capacitors (C
BL
) and biasing resistor must be supplied externally
for positive voltage operation.
C
BL
= 47 pF for operation >500 MHz.
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature
+25˚C
+85˚C
-40˚C
40
42
44
46
48
50
52
54
56
58
60
024681012141618202224262830
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation Control
Input Power @ 1 dB Compression
State Voltage (V)+25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss 3 23.1 23.3 24.3
1 3 23.5 23.3 24.2
2 3 22.7 22.7 23.7
4 3 33.8 33.2 33.8
8 3 31.7 31.7 22.7
16 3 20.2 20.5 21.4
31 3 21.9 20.6 23.6
Loading...