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
a73 Positive Voltage Operation (+5 V)
a73 MLF 5 x 5 mm Leadless Package
a73 Integrated Silicon Serial-to-Parallel Driver
a73 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 (V
CC
= +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 V
IH
(1) 3.5 5.0 V
Input Voltage Low V
IL
(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 (V
CC
= +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.