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Электронный компонент: AA264-87

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Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
1
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator
2 dB LSB Positive Control 0.52 GHz
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
TSSOP-16
AA264-87
0.173 (4.40 mm)
0.004 (0.10 mm)
0.197 (5.00 mm)
0.004 (0.10 mm)
0.252 (6.4 mm)
BSC
PIN 16
PIN 1
INDICATOR
PIN 1
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.047 (1.20 mm)
MAX.
0.035 (0.90 mm)
+ 0.006 (0.15 mm) /
-0.004 (-0.10 mm)
0.0256 (0.65 mm)
BSC
0.009 (0.22 mm) REF.
R 0.004 (0.09 mm)
MIN.
0.024
(0.60 mm)
0.006
(0.15 mm)
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 (V
1
V
4
). 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.
Parameter
1
Condition
Frequency
Min.
Typ.
Max.
Unit
Insertion Loss
0.51.0 GHz
1.6
2.0
dB
0.52.0 GHz
1.8
2.4
dB
Attenuation Range
30
dB
Attenuation Accuracy
2
0.51.0 GHz
(0.2 + 3% of
Attenuation Setting in dB)
dB
0.52.0 GHz
(0.3 + 5% of
224 dB Setting)
dB
0.52.0 GHz
(0.3 + 6% of
2630 dB Setting)
dB
VSWR (I/O)
3
0.50.8 GHz
1.8:1
2.2:1
0.82.0 GHz
1.5:1
2.0:1
Switching Characteristics
4
Rise, Fall (10/90% or 90/10% RF)
150
ns
On, Off (50% CTL to 90/10% RF)
300
ns
Video Feedthru
70
mV
Input Power for 1 dB Compression
V
S
= +3 V
0.52.0 GHz
+15
+21
dBm
V
S
= +5 V
0.52.0 GHz
+21
+27
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
V
S
= +3 V
0.52.0 GHz
+36
+44
dBm
V
S
= +5 V
0.52.0 GHz
+37
+45
dBm
Control Voltages
V
Low
= 0 to 0.2 V @ 20 A Max.
V
High
= +3 V @ 100 A Max. to +5 V @ 200 A Max.
V
S
= V
High
0.2 V
Electrical Specifications at -40C to +85C (0, +5 V)
1. All measurements made in a 50
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.
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.52 GHz
AA264-87
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0
0.5
1.0
1.5
2.0
2.5
3.0
+25C
+85C
-40C
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
35
40
45
50
55
60
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
+25C
+85C
-40C
VSWR vs. Frequency (25C)
VSWR
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
1.0
1.2
1.4
1.6
1.8
2.0
2.2
Ins. Loss
2 dB
4 dB
8 dB
16 dB
30 dB
Ins. Loss
2 dB
4 dB
8 dB
16 dB
30 dB
VSWR vs. Frequency (85C)
VSWR
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
1.0
1.2
1.4
1.6
1.8
2.0
2.2
VSWR
Frequency (GHz)
VSWR vs. Frequency (-40C)
0
0.5
1.0
1.5
2.0
2.5
3.0
1.0
1.2
1.4
1.6
1.8
2.0
2.2
Ins. Loss
2 dB
4 dB
8 dB
16 dB
30 dB
Typical Performance Data (0, +5 V)
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation
Control
Input Power @ 1 dB Compression
State
Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm)
Ins. Loss
5
29.0
28.9
29.0
2 dB
5
28.3
28.1
28.1
4 dB
5
35.2
34.7
35.0
8 dB
5
25.8
25.3
25.4
16 dB
5
21.7
21.3
21.6
30 dB
5
24.4
23.2
27.2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
3
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.52 GHz
AA264-87
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (25C)
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (85C)
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (25C)
-15
-5
5
15
25
35
45
55
65
75
85
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (85C)
-15
-5
5
15
25
35
45
55
65
75
85
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40C)
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (-40C)
-15
-5
5
15
25
35
45
55
65
75
85
2 dB
4 dB
8 dB
16 dB
30 dB
4
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.52 GHz
AA264-87
Insertion Loss (dB)
Frequency (GHz)
Insertion Loss vs. Frequency
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0
0.5
1.0
1.5
2.0
2.5
3.0
+25C
+85C
-40C
VSWR vs. Frequency (25C)
VSWR
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
Ins. Loss
2 dB
4 dB
8 dB
16 dB
30 dB
1.0
1.2
1.4
1.6
1.8
2.0
2.2
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (25C)
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (85C)
-4.5
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Insertion Phase (dB)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (25C)
-10
0
10
20
30
40
50
60
70
80
90
2 dB
4 dB
6 dB
8 dB
30 dB
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40C)
0
0.5
1.0
1.5
2.0
2.5
3.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0
0.5
1.0
2 dB
4 dB
8 dB
16 dB
30 dB
Typical Performance Data (0, +3 V)
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
5
Specifications subject to change without notice. 9/00A
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.52 GHz
AA264-87
Truth Table
V
1
V
2
V
3
V
4
Attenuation
16 dB
8 dB
4 dB
2 dB
J
1
J
2
V
High
V
High
V
High
V
High
Reference I.L.
V
High
V
High
V
High
0
2 dB
V
High
V
High
0
V
High
4 dB
V
High
0
V
High
V
High
8 dB
0
V
High
V
High
V
High
16 dB
0
0
0
0
30 dB Max. Atten.
V
High
= +3 to +5 V (V
S
= V
High
0.2 V).
12
3
4
5
6
8
16
15
14
13
12
11
9
7
10
16 dB
8 dB
4 dB
2 dB
GND
V
4
V
3
V
2
J
1
GND
GND
GND
GND
GND
GND
GND
GND
GND
V
1
J
2
C
BL
C
BL
V
S
10 k
Pin Out
Characteristic
Value
RF Input Power
1 W > 500 MHz 0/8 V
0.5 W @ 50 MHz 0/8 V
Supply Voltage
+8 V
Control Voltage
-0.2 V, +8 V
Operating Temperature
-40C to +85C
Storage Temperature
-65C to +150C
Absolute Maximum Ratings
Note: Exceeding these parameters may cause irreversible damage.
DC blocking capacitors (C
BL
) and biasing resistor must be supplied externally
for positive voltage operation.
C
BL
= 47 pF for operation >500 MHz.
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
37
39
41
43
45
47
49
51
53
55
57
+25C
+85C
-40C
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation
Control
Input Power @ 1 dB Compression
State
Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm)
Ins. Loss
3
21.7
21.6
22.6
2 dB
3
21.2
20.7
21.4
4 dB
3
34.3
31.0
34.3
8 dB
3
33.6
23.0
32.9
16 dB
3
18.0
17.0
21.4
30 dB
3
22.4
21.2
24.1