Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579 Email sales@alphaind.com www.alphaind.com
1
Specifications subject to change without notice. 5/00A
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
AA104-73
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
Parameter1
Frequency2
Min.
Typ.
Max.
Unit
Insertion Loss
DC–1.0 GHz
0.8
1.0
dB
1.0–2.0 GHz
0.9
1.2
dB
2.0–2.5 GHz
1.0
1.3
dB
Attenuation Range
DC–1.0 GHz
32
dB
1.0–2.0 GHz
27
dB
2.0–2.5 GHz
24
dB
Attenuation Accuracy3, 4
DC–0.5 GHz
± (0.4 + 10% of Attenuation Setting in dB)
dB
0.85–0.95 GHz
± (0.4 + 5% of Attenuation Setting in dB)
dB
1.7–2.0 GHz
± (0.5 + 6% of Attenuation Setting in dB)
dB
2.0–2.5 GHz
± (0.6 + 7% of Attenuation Setting in dB)
dB
VSWR (Insertion Loss State)5
DC–2.5 GHz
1.2:1
1.5:1
VSWR (Attenuation State)5
DC–2.5 GHz
1.5:1
2.0:1
Electrical Specifications at -40 to 85°C (0, +3 V), (0, +5 V)
0.074
(1.90 mm REF.)
0.071 (1.80 mm)
0.052 (1.30 mm)
0.037 (0.95 mm) REF.
0.122 (3.10 mm)
0.106 (2.70 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.020 (0.51 mm)
0.014 (0.350 mm)
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
PIN 1
INDICATOR
0.022 (0.61 mm)
0.004 (0.10 mm)
0.014
(0.26 mm)
0.004
(0.10 mm)
0.012
(0.30 mm)
TYP.
5.0 ± 1
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics6
Rise, Fall (10/90% or 90/10% RF)
50
ns
On, Off (50% CTL to 90/10% RF)
100
ns
Video Feedthru
25
mV
Input Power for 1 dB Compression
VS = +3 V
0.5–2.5 GHz
14
+21
dBm
VS = +5 V
0.5–2.5 GHz
18
+23
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +10 dBm
VS = +3 V
0.5–2.5 GHz
36
+41
dBm
VS = +5 V
0.5–2.5 GHz
38
+44
dBm
Control Voltages
VLow = 0 to 0.2 V @ 20 A Max.
VHigh = +3 V @ 100 A Max. to +5 V @ 200 A Max.
1. All measurements made in a 50
system, unless otherwise specified.
2. Operates to DC when controlled with negative voltage, CBP not required.
3. Attenuation value set by CBP.
4. Attenuation referenced to insertion loss.
5. Input/output. In band.
6. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
7. DC = 30 KHz.
GaAs IC 1 Bit Digital Attenuator
32 dB 2.5 GHz
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.