ALPHA AA210-25 Datasheet
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 10/99A
Parameter
1
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 0.50–2.0 GHz +28 dBm
0.05 GHz +22 dBm
Intermodulation Intercept Point (IP3) For Two-tone Input Power +5 dBm 0.50–2.0 GHz +48 dBm
0.05 GHz +38 dBm
Control Voltages V
Low
= 0 to -0.2 V @ 10 µA Typ.
V
High
= -5 @ 10 µA Typ. to -8 V @ 200 µA Typ.
GaAs IC 4 Bit Digital Attenuator
1 dB LSB DC–2 GHz
Features
■ Attenuation in 1 dB Steps to 15 dB with
High Accuracy
■ Low Intermodulation Products
■ Low Cost SOIC-16 Plastic Package
■ Low DC Power Consumption
SOIC-16
AA210-25
(Previously AD210-25)*
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 AD210-25 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.
Attenuator bits are switched with -5 and 0 V.
The AD210-25 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.
Parameter
1
Frequency
2
Min. Typ. Max. Unit
Insertion Loss
3
DC–0.1 GHz 0.9 1.2 dB
DC–0.5 GHz 1.1 1.5 dB
DC–1.0 GHz 1.3 1.8 dB
DC–2.0 GHz 2.1 2.5 dB
Attenuation Range 15 dB
Attenuation Accuracy
4
DC–1.0 GHz ± (0.25 + 3% of Attenuation dB
Setting in dB)
DC–2.0 GHz ± (0.4 + 5% of Attenuation dB
Setting in dB)
VSWR (I/O) DC–1.0 GHz 1.3:1 1.4:1
DC–2.0 GHz 1.6:1 1.8:1
Electrical Specifications at 25°C (0, -5 V)
Operating Characteristics at 25°C (0, -5 V)
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.
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 DC–2 GHz AA210-25
2 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
Insertion Loss vs. Frequency
Frequency (GHz)
0
4
3
0
0.5 1 1.5 2.0
2
1
dB
0
6
12
18
0.50 1.0 1.5 2.0
Frequency (GHz)
dB
Attenuation vs. Frequency (All States)
Frequency (GHz)
VSWR vs. Frequency
0
2.0
1.8
1.6
1.4
1.2
1.0
1 1.5 2.00.5
15 dB State
Insertion Loss
4 dB State
1 dB State
8 dB State
2 dB State
Typical Performance Data (0, -5 V)
V8V7V6V5V4V3V2V
1
J1GND GND GND GND GND GND J
2
12 3 4 5 6 7 8
16 15
14
13 12 11 10 9
8 dB 4 dB 2 dB 1 dB
Characteristic Value
RF Input Power 1.5 W > 500 MHz 0/-8 V
0.5 W @ 50 MHz 0/-8 V
Control Voltage +0.2 V, -8 V
Operating Temperature -40°C to +85°C
Storage Temperature -65°C to +150°C
Absolute Maximum Ratings
Note: Exceeding these parameters may cause irreversible damage.
V1V2V3V4V5V6V7V
8
Attenuation
1 dB 2 dB 4 dB 8 dB
J1–J
2
-5 0 -5 0 -5 0 -5 0 Reference I. L.
0 -5 -5 0 -5 0 -5 0 1 dB
-5 0 0 -5 -5 0 -5 0 2 dB
-50-50 0-5-50 4 dB
-5 0 -5 0 -5 0 0 -5 8 dB
0 -5 0 -5 0 -5 0 -5 15 dB
Truth Table
Pin Out
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