ALPHA AA107-310 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 DC–2 GHz
Features
■ Positive Voltage Operation (+5 V)
■ MLF 5 x 5 mm Leadless Package
■ Integrated Silicon Serial-to-Parallel Driver
■ Attenuation 0.5 dB Steps to 15.5 dB
MLF 5 x 5 (-310)
AA107-310
Description
The AA107-310 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 at IF
frequencies where high attenuation accuracy, low insertion
loss and low intermodulation products are required. Typical
applications include base station, wireless and RF data and
wireless local loop gain control circuits.
Parameter
1
Condition Frequency
2
Min. Typ. Max. Unit
Insertion Loss
3
DC–1.0 GHz 1.4 1.7 dB
DC–2.0 GHz 1.7 2.2 dB
Attenuation Range
4, 5
15.5 dB
Attenuation Accuracy
4, 5
DC–1.0 GHz ± (0.2 + 3% of
Attenuation Setting in dB) dB
DC–2.0 GHz ± (0.4 + 3% of
Attenuation Setting in dB) dB
VSWR (I/O) DC–2.0 GHz 1.4:1 1.8:1
Switching Characteristics
6
Rise, Fall (10/90% or 90/10% RF) 50 ns
On, Off (50% CTL to 90/10% RF) 100 ns
Video Feedthru 50 mV
Input Power for 1 dB Compression 0.50–2.0 GHz +24 +29 dBm
0.05 GHz +17 +22 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm 0.50–2.0 GHz +44 +50 dBm
0.05 GHz +35 +40 dBm
Control Voltages V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= -5 V @ 300 µA Max.
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 (VCC= +5 V)
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/°C.
4. Attenuation value referenced above insertion loss.
5. Exposed pad must be connected to RF ground to obtain specified attenuation.
6. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
GaAs IC 5 Bit Digital Attenuator With Serial-to-Parallel Driver DC–2 GHz AA107-310
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
Truth Table
J1–J
2
Reset 0.5 dB 1 dB 2 dB 4 dB 8 dB Attenuation
1 0 0 0 0 0 Insertion Loss
1 1 0 0 0 0 0.5 dB
1 0 1 0 0 0 1 dB
1 0 0 1 0 0 2 dB
1 0 0 0 1 0 4 dB
1 0 0 0 0 1 8 dB
1 1 1 1 1 1 15.5 dB
0 X X X X X Insertion Loss
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)
-2.0
-1.5
-1.0
-0.5
0
0 0.5 1.0 1.5 2.0
Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
-1.0
-0.8
-0.6
-0.4
0.2
-0.2
0
0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy vs. Frequency
0.5 1.0 1.5 2.0
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
0 0.5 1.0 1.5 2.0
VSWR
Frequency (GHz)
VSWR vs. Frequency
1.0
1.1
1.2
1.3
1.4
1.5
Ins. Loss
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Serial Data Input
VIL(0) = 0 to 0.5 V.
V
IH
(1) = 3.5 to 5 V.
X = Don’t Care.
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
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