
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
1
GaAs IC 5 Bit Digital Attenuator With
Serial-to-Parallel Driver 0.5–2.5 GHz
Features
I
Positive Voltage Operation (+5 V)
I
MLF 5 x 5 mm Leadless Package
I
Integrated Silicon Serial-to-Parallel Driver
I
Attenuation 1 dB Steps to 31 dB
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.
MLF 5 x 5 (-310)
AA109-310
Parameter
1
Condition
Frequency
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
Min.
Typ.
2.0
2.7
3.1
15.5
Max.
2.4
3.1
3.6
Unit
dB
dB
dB
dB
Insertion Loss
2
Attenuation Range
3, 4
Attenuation Accuracy
3, 4
0.5–1.0 GHz
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.3 + 5% of
Attenuation Setting in dB)
± (0.3 + 6% of
Attenuation Setting in dB)
1.5:1
100
300
70
+21
+27
dB
1.0–2.0 GHz
dB
2.0–2.5 GHz
dB
VSWR (I/O)
Switching Characteristics
5
0.5–2.5 GHz
2.2:1
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
V
S
= +3 V
V
S
= +5 V
For Two-tone Input Power +5 dBm
V
S
= +3 V
V
S
= +5 V
μs
μs
mV
dBm
dBm
Input Power for 1 dB Compression
0.9–2.5 GHz
0.9–2.5 GHz
Intermodulation Intercept Point (IP3)
0.9–2.5 GHz
0.9–2.5 GHz
+41
+45
dBm
dBm
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
V
IH
(1)
V
IL
(0)
I
L
I
CC
V
CC
Min.
Typ.
3.5
0.5
±0.5
500
5.0
Max.
5.0
Unit
V
V
μ
A
μ
A
V
Input Voltage High
Input Voltage Low
Input Leakage Current
Quiescent Current
Supply Voltages
1. All measurements made in a 50
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation value referenced above insertion loss.
0
DC Electrical Characteristics at 25°C (0, +5 V)
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.