ALPHA AA100-59 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. 3/99A
Parameter Condition Frequency Min. Typ. Max. Unit
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF) 0.7 µs
On, Off (50% CTL to 90/10% RF) 1.0 µs
Video Feedthru 50 mV
Input Power for 1 dB Compression VS= +3 V 0.75–2.0 GHz +20 dBm
VS= +5 V 0.75–2.0 GHz +26 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +10 dBm
VS= +3 V 0.75–2.0 GHz +32 dBm
VS= +5 V 0.75–2.0 GHz +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
GaAs IC 3 Bit Digital Attenuator
4 dB LSB Positive Control 0.75–2 GHz
Features
■ Attenuation in 4 dB Steps to 28 dB
with High Accuracy
■ Single Positive Control Voltage
for Each Bit
■ +3 V to +5 V Operation
■ Small Low Cost MSOP-8 Plastic Package
MSOP-8
AA100-59
0.012 (0.30 mm)
PIN 1
PIN 1
INDICATOR
+ 0.006 (0.15 mm)
7.0˚
TYP.
0.038 (0.95 mm)
0.030 (0.75 mm)
0.017
(0.43 mm)
8.0˚
MAX.
0.028 (0.70 mm)
0.016 (0.40 mm)
0.007 (0.18 mm)
± 0.005 (0.12 mm)
0.006 (0.15 mm)
0.002 (0.05 mm)
- 0.002 (0.05 mm)
0.0256 (0.65 mm) TYP.
0.118 (3.00 mm)
± 0.004 (0.1 mm)
SQ.
0.193 (4.90 mm)
REF.
Description
The AA100-59 is a 3 bit, single positive control, 4 dB step
GaAs IC FET digital attenuator in a low cost MSOP-8
plastic package. For positive operation external DC
blocking capacitors are required on all RF ports. The
AA100-59 is particularly suited where high attenuation
accuracy, low insertion loss and low intermodulation
products are required.T ypical applications include cellular ,
radio, wireless data, wireless local loop and other gain le vel
control circuits.
Operating Characteristics at 25°C (0, +3 V)
Parameter
1
Frequency Min. Typ. Max. Unit
Insertion Loss
2
0.75–2.0 GHz 1.8 2.1 dB
Attenuation Range 0.75–2.0 GHz 28 dB
Attenuation Accuracy
3
0.75–1.0 GHz ± (0.2 + 3% of dB
Attenuation Setting in dB)
0.75–2.0 GHz ± (0.3 + 3% of dB
Attenuation Setting in dB)
VSWR (I/O) 0.75–2.0 GHz 1.5:1 2.0:1
Electrical Specifications at 25°C (0, +3 V)
1.All measurements made in a 50 Ω 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.
Preliminary
GaAs IC 3 Bit Digital Attenuator 4 dB LSB Positive Control 0.75–2 GHz AA100-59
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 3/99A
0
1
2
3
4
5
6
0.5 1.0 1.5 2.0 2.5
Frequency (GHz)
Insertion Loss vs. Frequency
dB
Frequency (GHz)
Attenuation vs. Frequency (All States)
0
5
0.5 1.0 1.5 2.0 2.5
10
15
20
25
30
dB
0
0.5
0.5 1.0
1.0
1.5
1.5
2.0
2.0
Frequency (GHz)
VSWR vs. Frequency (All States)
Typical Performance Data (0, +3 V)
8 7 6 5
J
1
V
2
V
1
GND
C
BL
V
S
10 kΩ
V
3
C
BL
J
2
GND
GND
8
dB
4
dB
16
dB
1 2 3 4
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 -40°C to +85°C
Storage Temperature -65°C to +150°C
Absolute Maximum Ratings
Pin Out
V
High
= +3 to +5 V (VS= V
High
± 0.2 V).
V
1
V
2
V
3
Attenuation
16 dB 4 dB 8 dB
J1–J
2
V
High
V
High
V
High
Ins. Loss
V
High
0 V
High
4 dB
V
High
V
High
0 8 dB
V
High
0 0 12 dB
0 V
High
V
High
16 dB
0 0 V
High
20 dB
0 V
High
0 24 dB
0 0 0 28 dB
Truth Table
DC blocking capacitors (CBL) and biasing resistor must be supplied externally
for positive operation.
C
BL
= 100 pF for operation >.75 GHz.
Note: Exceeding these parameters may cause irreversible damage.
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