GaAs IC 4 Bit Digital Attenuator
1 dB LSB DC–2 GHz
AA210-25
(Previously AD210-25)*
Features
I
Attenuation in 1 dB Steps to 15 dB with
High Accuracy
I
Low Intermodulation Products
I
Low Cost SOIC-16 Plastic Package
I
Low DC Power Consumption
SOIC-16
PIN 16
0.050
(1.27 mm) BSC
PIN 1
INDICATOR
0.244 (6.20 mm)
0.228 (5.80 mm)
PIN 1
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.
0.020 (0.51 mm)
0.013 (0.33 mm)
0.049 (1.24 mm)
0.016 (0.41 mm)
0.068
(1.73 mm) MAX.
0.016 MAX.
(0.41 mm)
x 45˚
CHAMFER
8˚ MAX.
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)
0.158 (4.00 mm)
0.150 (3.80 mm)
Electrical Specifications at 25°C (0, -5 V)
Parameter
1
Insertion
Loss
3
Frequency
2
DC–0.1
DC–0.5
DC–1.0
DC–2.0
GHz
GHz
GHz
GHz
Min.
Typ.
0.9
1.1
1.3
2.1
15
DC–1.0 GHz
DC–2.0 GHz
VSWR (I/O)
DC–1.0 GHz
DC–2.0 GHz
± (0.25 + 3% of Attenuation
Setting in dB)
± (0.4 + 5% of Attenuation
Setting in dB)
1.3:1
1.6:1
1.4:1
1.8:1
Max.
1.2
1.5
1.8
2.5
Unit
dB
dB
dB
dB
dB
dB
dB
Attenuation Range
Attenuation Accuracy
4
Operating Characteristics at 25°C (0, -5 V)
Parameter
1
Switching
Characteristics
5
Condition
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
0.50–2.0 GHz
0.05 GHz
Frequency
Min.
Typ.
15
25
25
+28
+22
+48
+38
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
V
Low
= 0 to -0.2 V @ 10 µA Typ.
V
High
= -5 @ 10 µA Typ. to -8 V @ 200 µA Typ.
4. Attenuation referenced to insertion loss.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
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.
*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
ALPHA [ ALPHA INDUSTRIES ]
