AA264-87 Datasheet, PDF (1/5 Pages) Alpha Industries – GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5-2 GHz

GaAs IC 4 Bit Digital Attenuator
2 dB LSB Positive Control 0.5–2 GHz
AA264-87
Features
s Attenuation 2 dB Steps to 30 dB
with High Accuracy
s Single Positive Control for Each Bit
s Low DC Power Consumption
s Small Low Cost TSSOP-16 Plastic
Package
Description
The AA264-87 is a 4 bit, single positive control GaAs IC
FET digital attenuator in a low cost TSSOP-16 package.
The attenuator requires external DC blocking capacitors,
positive supply voltage (V_S) and four individual positive
control voltages (V₁–V₄). The AA264-87 is particularly
suited where high attenuation accuracy, low insertion loss
and low intermodulation products are required. Typical
applications include base station, wireless data and
wireless local loop gain control circuits.
TSSOP-16
PIN 16
0.173 (4.40 mm)
± 0.004 (0.10 mm)
0.252 (6.4 mm)
BSC
PIN 1
INDICATOR
PIN 1
0.197 (5.00 mm)
± 0.004 (0.10 mm)
0.0256 (0.65 mm) 0.047 (1.20 mm)
BSC
MAX.
R 0.004 (0.09 mm)
MIN.
0.009 (0.22 mm) REF.
0.035 (0.90 mm)
+ 0.006 (0.15 mm) /
-0.004 (-0.10 mm)
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.024
(0.60 mm)
± 0.006
(0.15 mm)
Electrical Specifications at -40°C to +85°C (0, +5 V)
Parameter¹
Condition
Frequency
Min. Typ.
Max. Unit
Insertion Loss
0.5–1.0 GHz
0.5–2.0 GHz
1.6
2.0
dB
1.8
2.4
dB
Attenuation Range
Attenuation Accuracy²
0.5–1.0 GHz
0.5–2.0 GHz
30
dB
± (0.2 + 3% of
Attenuation Setting in dB)
dB
± (0.3 + 5% of
2–24 dB Setting)
dB
VSWR (I/O)³
Switching Characteristics⁴
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
0.5–2.0 GHz
0.5–0.8 GHz
0.8–2.0 GHz
± (0.3 + 6% of
26–30 dB Setting)
dB
1.8:1
1.5:1
2.2:1
2.0:1
150
ns
300
ns
70
mV
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
V_S = +3 V
V_S = +5 V
0.5–2.0 GHz
0.5–2.0 GHz
For Two-tone Input Power +5 dBm
V_S = +3 V
V_S = +5 V
0.5–2.0 GHz
0.5–2.0 GHz
V_Low = 0 to 0.2 V @ 20 µA Max.
V_High = +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
V_S = V_High ± 0.2 V
+15
+21
+21
+27
+36
+44
+37
+45
dBm
dBm
dBm
dBm
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. Attenuation referenced to insertion loss.
3. Input/output.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com
1
Specifications subject to change without notice. 9/00A