Preliminary
GaAs IC 5 Bit Digital Attenuator With
Serial-to-Parallel Driver DC–2 GHz
AA107-310
Features
I
Positive Voltage Operation (+5 V)
I
MLF 5 x 5 mm Leadless Package
I
Integrated Silicon Serial-to-Parallel Driver
I
Attenuation 0.5 dB Steps to 15.5 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.
SEATING
PLANE
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.
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.
0.019 (0.50 mm) BSC
0.138 (3.50 mm) REF.
Electrical Specifications at 25°C (V
CC
= +5 V)
Parameter
1
Insertion Loss
3
Attenuation Range
4, 5
Attenuation
Accuracy
4, 5
DC–1.0 GHz
DC–2.0 GHz
VSWR (I/O)
Switching Characteristics
6
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
0.50–2.0 GHz
0.05 GHz
For Two-tone Input Power +5 dBm
V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= -5 V @ 300 µA Max.
0.50–2.0 GHz
0.05 GHz
+24
+17
+44
+35
DC–2.0 GHz
Condition
Frequency
2
DC–1.0 GHz
DC–2.0 GHz
Min.
Typ.
1.4
1.7
15.5
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.4 + 3% of
Attenuation Setting in dB)
1.4:1
50
100
50
+29
+22
+50
+40
1.8:1
ns
ns
mV
dBm
dBm
dBm
dBm
Max.
1.7
2.2
Unit
dB
dB
dB
dB
dB
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
DC Electrical Characteristics at 25°C (V
CC
= +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. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/°C.
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. 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.
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 ]
