ALPHA AA109-310 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. 3/01A
GaAs IC 5 Bit Digital Attenuator With
Serial-to-Parallel Driver 0.5–2.5 GHz
Features
■ Positive Voltage Operation (+5 V)
■ MLF 5 x 5 mm Leadless Package
■ Integrated Silicon Serial-to-Parallel Driver
■ Attenuation 1 dB Steps to 31 dB
MLF 5 x 5 (-310)
AA109-310
Description
The AA109-310 is a GaAs FET IC 5 bit digital attenuator
with a serial-to-parallel driver packaged in a 32 leadless
exposed pad plastic package.It is particularly suited where
high attenuation accuracy, low insertion loss and low
intermodulation products are required. Typical applications
include base station, wireless and wireless local loop gain
control circuits.
Parameter
1
Condition Frequency Min. Typ. Max. Unit
Insertion Loss
2
0.5–1.0 GHz 2.0 2.4 dB
1.0–2.0 GHz 2.7 3.1 dB
2.0–2.5 GHz 3.1 3.6 dB
Attenuation Range
3, 4
15.5 dB
Attenuation Accuracy
3, 4
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) 0.5–2.5 GHz 1.5:1 2.2:1
Switching Characteristics
5
Rise, Fall (10/90% or 90/10% RF) 100 µs
On, Off (50% CTL to 90/10% RF) 300 µs
Video Feedthru 70 mV
Input Power for 1 dB Compression VS= +3 V 0.9–2.5 GHz +21 dBm
VS= +5 V 0.9–2.5 GHz +27 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm
VS= +3 V 0.9–2.5 GHz +41 dBm
VS= +5 V 0.9–2.5 GHz +45 dBm
Electrical Specifications at 25°C (VCC= +5 V)
0.001
(0.025 mm)
0.039 (1.00 mm) MAX.
SEATING
PLANE
12˚ MAX.
0.197 (5.00 mm) BSC
0.197
(5.00 mm)
BSC
1
32
0.187
(4.75 mm) BSC
0.187
(4.75 mm)
BSC
PIN 1
INDICATOR
0.122 (3.10 mm)
± 0.006 (0.15 mm)
0.122 (3.10 mm)
± 0.006 (0.15 mm)
32
1
0.138 (3.50 mm) REF.
0.138
(3.50 mm) REF.
0.019 (0.50 mm) BSC
Preliminary
Parameter Symbol Min. Typ. Max. Unit
Input Voltage High VIH(1) 3.5 5.0 V
Input Voltage Low VIL(0) 0 0.5 V
Input Leakage Current I
L
±0.5 µA
Quiescent Current I
CC
500 µA
Supply Voltages V
CC
5.0 V
DC Electrical Characteristics at 25°C (0, +5 V)
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation value referenced above insertion loss.
4. Exposed pad must be connected to RF ground to obtain specified attenuation.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver 0.5–2.5 GHz AA109-310
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 3/01A
Dimensions in inches (mm).
0.122
(3.10 mm)
SQ.
0.020 (0.50 mm)
0.020
(0.50 mm)
0.020 (0.50 mm)
0.020
(0.50 mm)
0.013 (0.33 mm)
Surface Mount Land Pattern
5 x 5 mm MLF 32 Lead
Truth Table
J1–J
2
Reset 1 dB 2 dB 4 dB 8 dB 16 dB Attenuation
1 1 1 1 1 1 Insertion Loss
1 0 1 1 1 1 1 dB
1 1 0 1 1 1 2 dB
1 1 1 0 1 1 4 dB
1 1 1 1 0 1 8 dB
1 1 1 1 1 0 16 dB
1 0 0 0 0 0 31 dB
0 X X X X X 31 dB
Characteristic Value
Supply Voltage (VCC) -0.5 to +6 V
Input Voltage (VI) -0.5 – VCC+ 0.5 V
Power Dissipation (PD) 500 mW
Storage Temperature (TST) -65°C to +125°C
Operating Temperature (TOP) -40°C to +85°C
Absolute Maximum Ratings
Typical Performance Data (V
CC
= +5 V)
Insertion Loss vs. Frequency
Frequency (GHz)
Insertion Loss (dB)
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
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)
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
VSWR vs. Frequency
Frequency (GHz)
VSWR
1.0
1.2
1.4
1.6
1.8
2.0
2.2
0 0.5 1.0 1.5 2.0 2.5
Ins. Loss
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Serial Data Input
VIL(0) = 0 to 0.5 V.
V
IH
(1) = 3.5 to 5 V.
X = Don’t Care.
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