Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
1
Specifications subject to change without notice. 3/99A
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF)
7
ns
On, Off (50% CTL to 90/10% RF)
10
ns
Video Feedthru
20
mV
Input Power for 1 dB Compression
For All Attenuation Levels
0.05 GHz
-3
dBm
0.90 GHz
0
dBm
Control Voltages
V
Low
= 0 to -0.2 V @ 20 A Max.
V
High
= -5 V @ 50 A Max. to -8 V @ 200 A Max.
V
S
= V
High
0.2 V
GaAs IC 15 dB Voltage Variable
Attenuator Single Control DC2 GHz
Features
s
Single Voltage Control, Positive or
Negative Voltage
s
Low Cost SOT-143 Package
s
15 dB Dynamic Range
s
Non-Reflective
AF002N2-32
0.021 (0.53 mm)
0.015 (0.38 mm)
0.075
(1.91 mm)
0.120 (3.05 mm)
0.105 (2.67 mm)
0.098 (2.49 mm)
0.083 (2.11 mm)
0.055 (1.40 mm)
0.047 1.19 mm)
0.037 (0.94 mm)
0.030 (0.76 mm)
0.035 (0.89 mm)
0.004 (0.19 mm)
0.001 (0.03 mm)
80' MAX.
0.010
(0.25 mm)
0.005 (0.13 mm)
0.006 (0.15 mm)
0.003 (0.08 mm)
Description
The AF002N2-32 is a single control non-reflective IC FET
VVA ideal for AGC applications. Its low DC drain
characteristic and size make it suitable for PCS and
portable cellular markets. A positive control voltage may
be used by adding 2 DC blocking capacitors (C
BL
) and
1 bypass capacitor (C
BP
).
Operating Characteristics at 25C (0, -5 V)
Parameter
1
Frequency
2
Min.
Typ.
Max.
Unit
Insertion Loss (V
1
= -5 V)
3
DC0.5 GHz
3.1
3.3
dB
DC1.0 GHz
3.3
3.5
dB
DC2.0 GHz
3.5
3.8
dB
Attenuation (V
1
= 0 V)
DC0.5 GHz
18
20
dB
DC1.0 GHz
14
16
dB
DC2.0 GHz
10
12
dB
VSWR (V
1
= 0 to -5 V)
DC2.0 GHz
2.0:1
2.2:1
Electrical Specifications at 25C (0, -5 V)
SOT-143
1. All measurements made in a 50
system, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/C.
4. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 3/99A
GaAs IC 15 dB Voltage Variable Attenuator Single Control DC2 GHz
AF002N2-32
5
4
3
2
1
2
1
Frequency (GHz)
Insertion Loss vs. Frequency
d
B
DC
+85C
-40C
Typical Performance Data (0, -5 V)
4
2
1
J
2
J
1
C
BP
V
S
V
1
10 k
C
BL
C
BL
GND
3
Characteristic
Value
RF Input Power
10 mW > 500 MHz 0/-8 V
4 mW @ 50 MHz 0/-8 V
Control Voltage
+0.2 V, -10 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
JC
25C/W
Absolute Maximum Ratings
Optimum Tuning for Maximum Attenuation
Pin Out
Note: Operating this device above any of these parameters may cause
irreversible damage.
-5
-4
-3
-2
-1
0
Attenuation (dB)
Attenuation vs. Control Voltage
3
6
9
12
15
18
21
F = 500 MHz
40
35
30
25
20
15
Attenuation (dB)
Attenuation vs. IP3
I
P
3
(
d
B
m
)
Two Tone Testing
at 70 and 71 MHz
P
IN
= 0 dBm
3
6
9
12
15
18
21
V
1
Attenuation J
1
J
2
-5
Insertion Loss
0
Full Attenuation
Truth Table
Negative Voltage Operation
Positive Voltage Operation
V
1
Attenuation J
1
J
2
V
High
Full Attenuation
0
Insertion Loss
V
High
= +5 V to +8 V (V
S
= V
High
0.2 V).
External components for positive voltage operation only.
C
BL
= 100 pF.
F (MHz)
C
BP
Typical Maximum Attenuation
130
220 pF
21
730
15 pF
21
1925
1.6 pF
21
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