ALPHA AA230-24

GaAs IC 3 Bit Digital Attenuator
4 dB LSB DC–2 GHz
AA230-24
(Previously AD230-24)*
Features
■ Attenuation in 4 dB steps to 28 dB with
High Accuracy
■ Low Cost SOIC-14 Plastic Package
■ Low DC Power Consumption
SOIC-14
PIN 14
0.244
(6.20 mm)
0.228
(5.80 mm)
0.158 (4.01 mm)
0.150 (3.81 mm)
PIN 1
INDICATOR
Description
0.020 (0.51 mm)
0.013 (0.33 mm)
PIN 1
The AD230-24 is an IC FET Digital Attenuator consisting
of three monolithic attenuators with LSB of 4 dB and a total
attenuation of 28 dB with all attenuators connected.
Attenuators are switched with -5 and 0 V.
The AD230-24 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.
0.050
(1.27 mm) BSC
0.050 (1.27 mm)
0.016 (0.40 mm)
0.068
(1.73 mm) MAX.
0.016 MAX.
(0.41 mm)
x 45˚
CHAMFER
0.049 (1.24 mm)
0.016 (0.41 mm)
8˚ MAX.
0.344 (8.75 mm)
0.337 (8.55 mm)
0.010 (0.25 mm)
0.0098 (0.25 mm)
0.004 (0.10 mm)
0.0075 (0.19 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
Electrical Specifications at 25°C (0, -5 V)
Parameter1
Frequency2
Insertion Loss3
DC–0.1
DC–0.5
DC–1.0
DC–2.0
Min.
GHz
GHz
GHz
GHz
Attenuation Range
Attenuation Accuracy4
DC–1.0 GHz
DC–2.0 GHz
VSWR (I/O)
Typ.
Max.
Unit
1.1
1.2
1.3
1.9
1.4
1.5
1.7
2.3
dB
dB
dB
dB
28
dB
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.4 + 5% of
Attenuation Setting in dB)
dB
DC–2.0 GHz
1.3:1
1.5:1
Typ.
Max.
dB
Operating Characteristics at 25°C (0, -5 V)
Parameter
Switching Characteristics5
Condition
Frequency
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Input Power for 1 dB Compression
Unit
15
25
25
ns
ns
mV
0.50–2.0 GHz
0.05 GHz
+28
+22
dBm
dBm
0.50–2.0 GHz
0.05 GHz
+48
+38
dBm
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
Control Voltages
VLow = 0 to -0.2 V @ 20 µA Max.
VHigh = -5 V @ 50 µA Typ. to -8 V @ 200 µA Max.
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.
Min.
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”.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 10/99A
1
GaAs IC 3 Bit Digital Attenuator 4 dB LSB DC–2 GHz
AA230-24
Typical Performance Data (0, -5 V)
3.0
2.0
2.5
1.5
dB
2.0
1.5
1.0
1.0
0.5
0.5
0
0
0
0.5
1.0
1.5
2.0
0.5
1.0
1.5
2.0
Frequency (GHz)
Insertion Loss vs. Frequency
VSWR vs. Frequency (All States)
Absolute Maximum Ratings
35
30
dB
0
Frequency (GHz)
Characteristic
Value
25
RF Input Power
20
Control Voltage
15
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
10
2 W > 500 MHz 0/-8 V
0.5 W @ 50 MHz 0/-8 V
+0.2 V, -8 V
Note: Exceeding these parameters may cause irreversible damage.
5
0
0
0.5
1.0
1.5
2.0
Pin Out
Frequency (GHz)
Attenuation vs. Frequency (All States)
Truth Table
V1
V2
2
J2
9
8
7
13
16 dB
V3
4 dB
J1 GND GND GND GND GND
14
V4
8 dB
V5
V6
Attenuation
J1–J2
16 dB
-5
0
-5
0
-5
-5
0
-5
0
-5
0
0
-5
16 dB
0
-5
0
-5
0
-5
28 dB
12
11
8 dB
10
4 dB
0
-5
0
Reference I.L.
-5
0
-5
0
4 dB
1
2
3
4
5
6
0
-5
-5
0
8 dB
V6
V5
V4
V3
V2
V1 GND
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 10/99A