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Электронный компонент: AA226-87

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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
1 dB LSB Positive Control 0.52.5 GHz
Features
s
Attenuation 1 dB Steps to 15 dB
with High Accuracy
s
Single Positive Control (+3 to +5 V) for
Each Bit
s
Low DC Power Consumption
s
Small Low Cost TSSOP-16 Plastic
Package
TSSOP-16
AA226-87
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 AA226-87 is a 4 bit, single positive control GaAs IC
FET digital attenuator. It requires DC blocking capacitors,
positive supply voltage (V
S
) and four individual positive bit
control voltages (V
1
V
4
). The AA226-87 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
1.3
1.7
dB
1.02.0 GHz
1.7
2.2
dB
2.02.5 GHz
2.3
2.6
dB
Attenuation Range
15
dB
Attenuation Accuracy
2
0.51.0 GHz
(0.2 + 3% of
Attenuation Setting in dB)
dB
1.02.5 GHz
(0.3 + 4% of
Attenuation Setting in dB)
dB
VSWR (I/O)
3
0.52.5 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
0.52.5 GHz
+20
+25
dBm
V
S
= +5 V
0.52.5 GHz
+24
+30
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
V
S
= +3 V
0.52.5 GHz
+43
+49
dBm
V
S
= +5 V
0.52.5 GHz
+44
+50
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 1 dB LSB Positive Control 0.52.5 GHz
AA226-87
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
+85C
-40C
+25C
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
44
46
48
50
56
52
58
54
60
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+25C
+85C
-40C
VSWR vs. Frequency (25C)
VSWR
0
0.5
1.0
1.5
2.0
2.5
3.0
Frequency (GHz)
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Ins. Loss
1 dB
2 dB
4 dB
8 dB
15 dB
VSWR
Frequency (GHz)
VSWR vs. Frequency (85C)
1.00
1.25
1.50
1.75
2.00
2.25
2.50
0
0.5
1.0
1.5
2.0
2.5
3.0
Ins. Loss
1 dB
2 dB
4 dB
8 dB
15 dB
VSWR
Frequency (GHz)
VSWR vs. Frequency (-40C)
1.00
1.25
1.50
1.75
2.00
2.25
2.50
0
0.5
1.0
1.5
2.0
2.5
3.0
Ins. Loss
1 dB
2 dB
4 dB
8 dB
15 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
31.6
31.0
30.8
1 dB
5
31.9
31.5
31.2
2 dB
5
31.4
31.1
30.9
4 dB
5
32.7
31.5
34.8
8 dB
5
33.0
32.8
33.5
15 dB
5
30.7
28.5
31.7
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 1 dB LSB Positive Control 0.52.5 GHz
AA226-87
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)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
15 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)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
15 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)
-10
-5
0
5
10
15
20
25
30
1 dB
2 dB
4 dB
8 dB
15 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)
-10
-5
0
5
10
15
20
25
30
1 dB
2 dB
4 dB
8 dB
15 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)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
15 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)
-10
-5
0
5
10
15
20
25
30
1 dB
2 dB
4 dB
8 dB
15 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 1 dB LSB Positive Control 0.52.5 GHz
AA226-87
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)
1.00
1.25
1.50
1.75
2.00
2.25
2.50
Ins. Loss
1 dB
2 dB
4 dB
8 dB
15 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 (25C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
15 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)
-1.25
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
15 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
Deviation from Nominal
Phase (Deg.)
Frequency (GHz)
Attenuation Phase Accuracy
vs. Frequency (25C)
-10
-5
0
5
10
15
20
25
30
1 dB
2 dB
4 dB
8 dB
15 dB
Deviation from Nominal
Attenuation (dB)
Frequency (GHz)
Attenuation Accuracy
vs. Frequency (-40C)
-1.00
-0.75
-0.50
-0.25
0
0.25
0.50
0.75
1.00
1 dB
2 dB
4 dB
8 dB
15 dB
0
0.5
1.0
1.5
2.0
2.5
3.0
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 1 dB LSB Positive Control 0.52.5 GHz
AA226-87
IP3 (dBm)
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
46
47
48
49
50
51
52
53
54
55
56
+25C
+85C
-40C
Compression Point vs. Attenuation,
Voltage, and Temperature
Truth Table
V
1
V
2
V
3
V
4
Attenuation
8 dB
4 dB
2 dB
1 dB
J
1
J
2
V
High
V
High
V
High
V
High
Reference I.L.
V
High
V
High
V
High
0
1 dB
V
High
V
High
0
V
High
2 dB
V
High
0
V
High
V
High
4 dB
0
V
High
V
High
V
High
8 dB
0
0
0
0
15 dB Max. Atten.
12
3
4
5
6
8
16
15
14
13
12
11
9
7
10
8 dB
4 dB
2 dB
1 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
V
High
= +3 to +5 V (V
S
= V
High
0.2 V).
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.
Attenuation
Control
Input Power @ 1 dB Compression
State
Voltage (V) +25C (dBm) +85C (dBm) -40C (dBm)
Ins. Loss
3
24.5
24.1
24.6
1 dB
3
25.2
24.8
25.2
2 dB
3
25.0
24.3
24.9
4 dB
3
31.2
30.4
32.8
8 dB
3
28.3
26.3
29.2
15 dB
3
26.6
24.8
27.5