Preliminary
GaAs IC 5 Bit Digital Attenuator With
Serial-to-Parallel Driver 0.5–2.5 GHz
AA109-310
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
MLF 5 x 5 (-310)
0.197 (5.00 mm) BSC
0.039 (1.00 mm) MAX.
PIN 1
0.187
0.001
INDICATOR
(4.75 mm) BSC
(0.025 mm)
32
1
0.187
(4.75 mm)
BSC
0.197
(5.00 mm)
BSC
12˚ MAX.
0.122 (3.10 mm)
± 0.006 (0.15 mm)
32
1
SEATING
PLANE
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.
0.122 (3.10 mm)
± 0.006 (0.15 mm)
0.138
(3.50 mm) REF.
0.019 (0.50 mm) BSC
0.138 (3.50 mm) REF.
Electrical Specifications at 25°C (V
CC
= +5 V)
Parameter
1
Insertion
Loss
2
Condition
Frequency
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
0.5–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
VSWR (I/O)
Switching Characteristics
5
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
0.9–2.5 GHz
0.9–2.5 GHz
0.9–2.5 GHz
0.9–2.5 GHz
0.5–2.5 GHz
Min.
Typ.
2.0
2.7
3.1
15.5
± (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
+41
+45
2.2:1
µs
µs
mV
dBm
dBm
dBm
dBm
Max.
2.4
3.1
3.6
Unit
dB
dB
dB
dB
dB
dB
dB
Attenuation Range
3, 4
Attenuation
Accuracy
3, 4
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
DC Electrical Characteristics at 25°C (0, +5 V)
Parameter
Input Voltage High
Input Voltage Low
Input Leakage Current
Quiescent Current
Supply Voltages
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.
Symbol
V
IH
(1)
V
IL
(0)
I
L
I
CC
V
CC
Min.
0
Typ.
3.5
0.5
±0.5
500
5.0
Max.
5.0
Unit
V
V
µA
µA
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.
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
ALPHA [ ALPHA INDUSTRIES ]
