AA280-25 Datasheet, PDF (1/5 Pages) Alpha Industries – GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz

GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB DC–2 GHz
Features
I Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
I Low DC Power Consumption
I Low Cost SOIC-16 Plastic Package
SOIC-16
PIN 16
PIN 1
INDICATOR
AA280-25
(Previously AD280-25)*
0.050
(1.27 mm) BSC
0.244 (6.20 mm)
0.228 (5.80 mm)
Description
The AD280-25 is a 5 bit, GaAs IC FET digital attenuator
in a low cost SOIC-16 package. This attenuator has an
LSB of 0.5 dB and a total attenuation of 15.5 dB.
The AD280-25 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.
PIN 1
0.068
(1.73 mm) MAX.
0.020 (0.51 mm)
0.013 (0.33 mm)
0.049 (1.24 mm)
0.016 (0.41 mm)
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 -40°C to +85°C (0, -5 V)
Parameter¹
Insertion Loss³
Condition
Frequency²
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
Min.
Typ.
1.1
1.4
1.7
Max. Unit
1.3
dB
1.7
dB
2.0
dB
Attenuation Range
Attenuation Accuracy³
VSWR (I/O⁾⁴
Switching Characteristics⁵
Rise, Fall (10/90% or 90%/10% RF)
On, Off (50% CTL to 90%/10% RF)
Video Feedthru
15.5
dB
DC–1.0 GHz ± (0.2 + 3% of
Attenuation Setting in dB)
dB
DC–2.0 GHz ± (0.4 + 3% of
Attenuation Setting in dB)
dB
DC–2.0 GHz
1.4:1
1.8:1
15
nS
25
nS
25
mV
Input Power for 1 dB Compression
0.5–2.0 GHz +24
+29
0.05 GHz
+17
+22
dBm
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
0.5–2.0 GHz +44
+50
0.05 GHz
+35
+40
dBm
dBm
Control Voltages
V_Low = 0 to 0.2 V @ 20 µA Max.
V_High = -5 V @ 300 µA Max.
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. DC = 300 kHz.
3. Attenuation referenced to insertion loss.
4. Input/Output
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 [e-mail] • www.alphaind.com
1
Specifications subject to change without notice. 11/00A