
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
1
Specifications subject to change without notice. 4/01A
GaAs IC 6 Bit Digital Attenuator with Driver
0.5 dB LSB Positive Control DC–1 GHz
Features
I Attenuation 0.5 dB Steps to 31.5 dB With
High Accuracy
I Single Positive Control (+5 V) for Each Bit
I Low DC Power Consumption
I CMOS Integrated Silicon Driver
I Designed for Use at IF Frequencies
MLF 5 x 5 (-310)
AA113-310
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
Description
The AA113-310 is a 6 bit, single positive control GaAs IC
FET digital attenuator with driver. 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 data, broadband and wireless local loop gain
control circuits.
Parameter1
Frequency
Min.
Typ.
Max.
Unit
Insertion Loss2
DC–0.5 GHz
1.5
1.8
dB
DC–1.0 GHz
1.8
2.2
dB
Attenuation Range
31.5
dB
Attenuation Accuracy3
DC–0.5 GHz
± (0.2 + 2% of
Attenuation Setting in dB)
dB
DC–1.0 GHz
± (0.25 + 3% of
Attenuation Setting in dB)
dB
VSWR (I/O)4
DC–1.0 GHz
1.4:1
1.6:1
Electrical Specifications at 25°C (0, +5 V)
Preliminary
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics5
Rise, Fall (10/90% or 90/10% RF)
30
ns
On, Off (50% CTL to 90/10% RF)
50
ns
Video Feedthru
50
mV
Input Power for 1 dB Compression
VCC = +5 V
0.5–1.0 GHz
+29
dBm
0.05 GHz
+22
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
0.5–1.0 GHz
+48
dBm
VCC = +5 V
0.05 GHz
+36
dBm
Supply Voltage
VCC = 5 V @ 700 A Typ.
Control Voltages
CTL05, CTL1, CTL2, CTL4, CTL8, CTL16, Low = 0 to 0.8 V @ 20 A Typ.
CTL05, CTL2, CTL4, CTL8, CTL16, High = 3.5 to 5.0 V @ 20 A Typ.
Operating Characteristics at 25°C (0, +5 V)
1. All measurements made in a 50
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/°C.
3. Attenuation referenced to insertion loss.
4. Input/output.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.