ALPHA AA101-80 Datasheet
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.
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
Loading...