GaAs IC 1 Bit Digital Attenuator
32 dB 2.5 GHz
AA104-73
Features
s
1 Bit Attenuation of 32 dB DC–1 GHz, 27 dB
1–2 GHz, 24 dB 2–2.5 dB
s
Combine with AA260-85 or AA101-80 for
63 dB 6 Bit Solution
s
Tune with One Capacitor and/or Resistor
to Desired Operating Frequency
and Attenuation
s
Ideal for Both IF and RF Applications Includ-
ing Cable, GSM, PCS, EDGE, 3G and ISM
SOT-6
0.074
(1.90 mm REF.)
PIN 6
PIN 1
INDICATOR
PIN 1
0.126 (3.20 mm)
0.087 (2.20 mm)
0.071 (1.80 mm)
0.052 (1.30 mm)
0.020 (0.51 mm)
0.014 (0.350 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.037 (0.95 mm) REF.
0.012
(0.30 mm)
TYP.
0.014
(0.26 mm)
0.004
(0.10 mm)
5.0˚ ± 1˚
0.006
(0.15 mm)
0.000
(0.00 mm)
5.0˚ ± 1˚
Description
The AA104-73 is a 1 bit, GaAs IC FET digital attenuator in
a low cost SOT-6 package. This attenuator has up to
32 dB total attenuation.The attenuator requires two lines of
voltage control. The AA104-73 is particularly suited where
high attenuation accuracy, low insertion loss and low
0.122 (3.10 mm)
0.106 (2.70 mm)
0.022 (0.61 mm)
0.004 (0.10 mm)
intermodulation products are required. Typical application
is as a sixth bit value for the AA260-85 and AA101-80. A total
attenuation of 63 dB in 1 dB steps can be obtained by
combining the two attenuators.
Electrical Specifications at -40 to 85°C (0, +3 V), (0, +5 V)
Parameter
1
Insertion Loss
Frequency
2
DC–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
DC–1.0 GHz
1.0–2.0 GHz
2.0–2.5 GHz
DC–0.5 GHz
0.85–0.95 GHz
1.7–2.0 GHz
2.0–2.5 GHz
DC–2.5 GHz
DC–2.5 GHz
±
±
±
±
(0.4
(0.4
(0.5
(0.6
+
+
+
+
Min.
Typ.
0.8
0.9
1.0
32
27
24
10% of Attenuation Setting in dB)
5% of Attenuation Setting in dB)
6% of Attenuation Setting in dB)
7% of Attenuation Setting in dB)
1.2:1
1.5:1
1.5:1
2.0:1
Max.
1.0
1.2
1.3
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Attenuation Range
Attenuation Accuracy
3, 4
VSWR (Insertion Loss State)
5
VSWR (Attenuation State)
5
Parameter
Switching
Characteristics
6
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
V
S
= +3 V
V
S
= +5 V
For Two-tone Input Power +10 dBm
V
S
= +3 V
V
S
= +5 V
Frequency
Min.
Typ.
50
100
25
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
0.5–2.5 GHz
0.5–2.5 GHz
0.5–2.5 GHz
0.5–2.5 GHz
14
18
36
38
+21
+23
+41
+44
Control Voltages
V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
5. Input/output. In band.
6. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
7. DC = 30 KHz.
1. All measurements made in a 50
Ω
system, unless otherwise specified.
2. Operates to DC when controlled with negative voltage, C
BP
not required.
3. Attenuation value set by C
BP
.
4. Attenuation referenced to insertion loss.
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 5/00A
1
ALPHA [ ALPHA INDUSTRIES ]
