GaAs IC 5 Bit Digital Attenuator
1 dB LSB DC–2 GHz
AA260-85
(Previously AD260-85)*
Features
s
Attenuation 1.0 dB Steps to 31 dB
with High Accuracy
s
Low DC Power Consumption
s
Low Cost SSOP-20 Plastic Package
SSOP-20
PIN 20
0.209 (5.30 mm)
±0.012 (0.30 mm)
0.307 (7.80 mm)
±0.016 (0.307 mm)
PIN 1
INDICATOR
PIN 1
Description
The AA260-85 is a 5 bit, GaAs IC FET digital attenuator
in a low cost SSOP-20 package. This attenuator has an
LSB of 1 dB and a total attenuation of 31 dB. The
AA260-85 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.
0.069
(1.75 mm)
±0.004
(0.10 mm)
0.283 (7.20 mm)
±0.012 (0.30 mm)
0.0256
0.078
(0.65 mm)
(2.00 mm)
BSC
MAX.
0.010 (0.25 mm)
0.004 (0.090 mm)
8˚ MAX.
0.012
(0.30 mm)
REF.
0.008 (0.20 mm) MAX.
0.002 (0.05 mm) MIN.
0.030 (0.75 mm)
±0.008 (0.10 mm)
Electrical Specifications at -40°C to +85°C (0, -5 V)
Parameter
1
Insertion Loss
Condition
Frequency
2
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–1.0 GHz
DC–1.8 GHz
DC–2.0 GHz
VSWR (I/O)
Switching Characteristics
4
Rise, Fall (10/90% or 90%/10% RF)
On, Off (50% CTL to 90%/10% RF)
Video Feedthru
V
High
= -5 V
For Two-tone Input Power +5 dBm
V
High
= -5 V
V
Low
= 0 to 0.2 V @ 20
µA
Max.
V
High
= -5 V @ 300
µA
Max.
3. Attenuation referenced to insertion loss.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Min.
Typ.
1.4
1.6
2.0
31
Max.
1.7
2.0
2.3
Unit
dB
dB
dB
dB
dB
dB
dB
nS
nS
mV
dBm
dBm
dBm
dBm
Attenuation Range
Attenuation
Accuracy
3
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.4 + 5% of
Attenuation Setting in dB)
± (0.5 + 6% of
Attenuation Setting in dB)
1.4:1
15
25
25
1.7:1
DC–2.0 GHz
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
0.5–2.0 GHz
0.05 GHz
0.5–2.0 GHz
0.05 GHz
+25
+18
+42
+30
+29
+22
+48
+36
1. All measurements made in a 50
Ω
system, unless otherwise specified.
2. DC = 300 kHz.
*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. 12/00A
1
ALPHA [ ALPHA INDUSTRIES ]
