Skyworks Solutions, Inc. [978] 241-7000
Fax [978] 241-7906 Email sales@skyworksinc.com www.skyworksinc.com
1
Specifications subject to change without notice. 12/99A
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
5
Rise, Fall (10/90% or 90/10% RF)
15
ns
On, Off (50% CTL to 90/10% RF)
25
ns
Video Feedthru
25
mV
Input Power for 1 dB Compression
0.502.0 GHz
+28
dBm
0.05 GHz
+22
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
0.502.0 GHz
+48
dBm
0.05 GHz
+38
dBm
Control Voltages
V
Low
= 0 to -0.2 V @ 20 A Max.
V
High
= -5 V @ 10 A Typ. to -8 V @ 200 A Max.
GaAs IC 4 Bit Digital Attenuator
1 dB LSB DC2 GHz
Features
Attenuation in 1 dB Steps to 15 dB with
High Accuracy
Designed for Cellular Radio Applications
Low Cost SOIC-16 Plastic Package
Low DC Power Consumption
AA310-25
(Previously AD310-25)*
0.158 (4.00 mm)
0.150 (3.80 mm)
0.068
(1.73 mm) MAX.
0.244 (6.20 mm)
0.228 (5.80 mm)
0.049 (1.24 mm)
0.016 (0.41 mm)
0.016 MAX.
(0.41 mm)
x 45
CHAMFER
0.020 (0.51 mm)
0.013 (0.33 mm)
0.050
(1.27 mm) BSC
PIN 16
PIN 1
PIN 1
INDICATOR
0.394 (10.00 mm)
0.386 (9.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.0098 (0.25 mm)
0.0075 (0.19 mm)
8 MAX.
Description
The AA310-25 is an IC FET digital attenuator consisting
of four monolithic attenuators with LSB of 1 dB and a total
attenuation of 15 dB with all attenuators connected.
This unit is a pin for pin replacement for the AT002D8-25
with improved RF performance extended to 2 GHz.
The AA310-25 is particularly suited where high
attenuation accuracy, low insertion loss and low
intermodulation products are required. Typical applications
include cellular radio, wireless data, wireless local loop and
other gain level control circuits.
Operating Characteristics at 25C (0, -5 V)
Parameter
1
Frequency
2
Min.
Typ.
Max.
Unit
Insertion Loss
3
DC0.1 GHz
0.9
1.2
dB
DC0.5 GHz
1.1
1.5
dB
DC1.0 GHz
1.3
1.8
dB
DC2.0 GHz
2.1
2.5
dB
Attenuation Range
15
dB
Attenuation Accuracy
4
DC1.0 GHz
(0.25 + 3% of Attenuation
dB
Setting in dB)
DC2.0 GHz
(0.4 + 5% of Attenuation
dB
Setting in dB)
VSWR (I/O)
DC1.0 GHz
1.3:1
DC2.0 GHz
1.6:1
Electrical Specifications at 25C (0, -5 V)
SOIC-16
1. All measurements made in a 50
system, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/C.
4. Attenuation referenced to insertion loss.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
*Due to conflict with another company's product numbering system, Alpha's attenuator products starting with the letters "AD" are being changed to "AA".
GaAs IC 4 Bit Digital Attenuator 1 dB LSB DC2 GHz
AA310-25
2
Skyworks Solutions, Inc. [978] 241-7000
Fax [978] 241-7906 Email sales@skyworksinc.com www.skyworksinc.com
Specifications subject to change without notice. 12/99A
Insertion Loss vs. Frequency
Frequency (GHz)
0
4
3
0
1
2
1
0.5
1.5
2.0
dB
0
0
6
12
0.5
1.0
1.5
2.0
18
Frequency (GHz)
Attenuation vs. Frequency (All States)
dB
Frequency (GHz)
VSWR vs. Frequency
dB
0
2.0
1.8
1.6
1.4
1.2
1.0
0.5
1.5
2.0
1
15 dB State
Insertion Loss
4 dB State
1 dB State
8 dB State
2 dB State
Typical Performance Data (0, -5 V)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
8
4 dB
2 dB
1 dB
8 dB
V
7
V
6
V
5
V
4
V
3
V
2
V
1
J
1
GND GND GND GND GND GND
J
2
Characteristic
Value
RF Input Power
2 W > 0.5 GHz 0/-8 V
0.5 W @ 50 MHz 0/-8 V
Control Voltage
+0.2 V, -8 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Absolute Maximum Ratings
Pin Out
Note: Exceeding these parameters may cause irreversible damage.
Truth Table
V
1
V
2
V
3
V
4
V
5
V
6
V
7
V
8
Attenuation
8 dB Bit
1 dB Bit
2 dB Bit
4 dB Bit
J
1
J
2
0
-5
0
-5
0
-5
0
-5
Reference I.L.
0
-5
-5
0
0
-5
0
-5
1 dB
0
-5
0
-5
-5
0
0
-5
2 dB
0
-5
0
-5
0
-5
-5
0
4 dB
-5
0
0
-5
0
-5
0
-5
8 dB
-5
0
-5
0
-5
0
-5
0
15 dB Max. Atten.
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