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AA226-87 [ALPHA]

GaAs IC 4 Bit Digital Attenuator 1 dB LSB Positive Control 0.5-2.5 GHz; 砷化镓集成电路4位数字衰减器1分贝LSB阳性对照0.5-2.5 GHz的
AA226-87
型号： AA226-87
厂家： ALPHA INDUSTRIES    ALPHA INDUSTRIES
描述：

GaAs IC 4 Bit Digital Attenuator 1 dB LSB Positive Control 0.5-2.5 GHz
砷化镓集成电路4位数字衰减器1分贝LSB阳性对照0.5-2.5 GHz的

射频 微波 衰减器
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GaAs IC 4 Bit Digital Attenuator  
1 dB LSB Positive Control 0.5–2.5 GHz  
AA226-87  
Features  
ꢀꢀAttenuation 1 dB Steps to 15 dB  
with High Accuracy  
TSSOP-16  
PIN 16  
0.173 (4.40 mm)  
0.252 (6.4 mm)  
± 0.004 (0.10 mm)  
BSC  
ꢀꢀSingle Positive Control (+3 to +5 V) for  
PIN 1  
INDICATOR  
Each Bit  
0.197 (5.00 mm)  
± 0.004 (0.10 mm)  
PIN 1  
ꢀꢀLow DC Power Consumption  
ꢀꢀSmall Low Cost TSSOP-16 Plastic  
0.0256 (0.65 mm) 0.047 (1.20 mm)  
BSC  
MAX.  
R 0.004 (0.09 mm)  
MIN.  
Package  
Description  
0.009 (0.22 mm) REF.  
0.006 (0.15 mm) MAX.  
0.002 (0.05 mm) MIN.  
0.024  
(0.60 mm)  
± 0.006  
The AA226-87 is a 4 bit, single positive control GaAs IC  
FET digital attenuator. It requires DC blocking capacitors,  
0.035 (0.90 mm)  
+ 0.006 (0.15 mm) /  
-0.004 (-0.10 mm)  
(0.15 mm)  
positive supply voltage (V ) and four individual positive bit  
S
control voltages (V –V ). The AA226-87 is particularly  
1
4
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.  
Electrical Specifications at -40°C to +85°C (0, +5 V)  
1
Parameter  
Condition  
Frequency  
Min.  
Typ.  
Max.  
Unit  
Insertion Loss  
0.5–1.0 GHz  
1.0–2.0 GHz  
2.0–2.5 GHz  
1.3  
1.7  
2.3  
1.7  
2.2  
2.6  
dB  
dB  
dB  
Attenuation Range  
15  
dB  
2
Attenuation Accuracy  
0.5–1.0 GHz  
1.0–2.5 GHz  
± (0.2 + 3% of  
Attenuation Setting in dB)  
± (0.3 + 4% of  
dB  
dB  
Attenuation Setting in dB)  
3
VSWR (I/O)  
0.5–2.5 GHz  
1.5:1  
2.0:1  
4
Switching Characteristics  
Rise, Fall (10/90% or 90/10% RF)  
On, Off (50% CTL to 90/10% RF)  
Video Feedthru  
150  
300  
70  
ns  
ns  
mV  
Input Power for 1 dB Compression  
Intermodulation Intercept Point (IP3)  
V
V
= +3 V  
= +5 V  
0.5–2.5 GHz  
0.5–2.5 GHz  
+20  
+24  
+25  
+30  
dBm  
dBm  
S
S
For Two-tone Input Power +5 dBm  
V
S
V
S
= +3 V  
= +5 V  
0.5–2.5 GHz  
0.5–2.5 GHz  
+43  
+44  
+49  
+50  
dBm  
dBm  
Control Voltages  
V
V
V
= 0 to 0.2 V @ 20 µA Max.  
= +3 V @ 100 µA Max. to +5 V @ 200 µA Max.  
Low  
High  
= V  
± 0.2 V  
S
High  
3. Input/output.  
4.Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.  
1. All measurements made in a 50 Ω system, unless otherwise specified.  
2. Attenuation referenced to insertion loss.  
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 0.5–2.5 GHz  
AA226-87  
Typical Performance Data (0, +5 V)  
0
-0.5  
-1.0  
-1.5  
2.50  
2.25  
2.00  
1.75  
1.50  
1.25  
1.00  
15 dB  
8 dB  
4 dB  
-40˚C  
+25˚C  
-2.0  
-2.5  
-3.0  
-3.5  
2 dB  
1 dB  
1.5  
+85˚C  
Ins. Loss  
2.0  
0
0.5  
1.0  
2.5  
3.0  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
Frequency (GHz)  
Frequency (GHz)  
VSWR vs. Frequency (25˚C)  
Insertion Loss vs. Frequency  
60  
58  
56  
54  
52  
50  
48  
46  
44  
2.50  
2.25  
2.00  
1.75  
1.50  
1.25  
1.00  
8 dB  
+25˚C  
+85˚C  
15 dB  
4 dB  
2 dB  
1 dB  
-40˚C  
Ins. Loss  
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
Attenuation (dB)  
Frequency (GHz)  
IP3 vs. Attenuation and  
Temperature (500 MHz)  
VSWR vs. Frequency (85˚C)  
2.50  
2.25  
2.00  
1.75  
1.50  
1.25  
1.00  
Compression Point vs. Attenuation,  
Voltage, and Temperature  
15 dB  
8 dB  
Input Power @ 1 dB Compression  
+
Voltage (V) 25°C (dBm) +85°C (dBm) -40°C (dBm)  
Attenuation Control  
State  
4 dB  
Ins. Loss  
5
5
5
5
5
5
31.6  
31.9  
31.4  
32.7  
33.0  
30.7  
31.0  
31.5  
31.1  
31.5  
32.8  
28.5  
30.8  
31.2  
30.9  
34.8  
33.5  
31.7  
2 dB  
1 dB  
1 dB  
2 dB  
4 dB  
8 dB  
15 dB  
Ins. Loss  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
Frequency (GHz)  
VSWR vs. Frequency (-40˚C)  
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 0.5–2.5 GHz  
AA226-87  
1.00  
0.75  
0.50  
0.25  
0
30  
25  
20  
15  
10  
5
15 dB  
8 dB  
15 dB  
8 dB  
4 dB  
-0.25  
-0.50  
-0.75  
-1.00  
2 dB  
1 dB  
0
1 dB 2 dB  
-5  
4 dB  
0.5  
-10  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0
0
0
1.0  
1.5  
2.0  
2.5  
3.0  
Frequency (GHz)  
Frequency (GHz)  
Attenuation Accuracy  
vs. Frequency (25˚C)  
Attenuation Phase Accuracy  
vs. Frequency (25˚C)  
1.00  
30  
25  
20  
15  
10  
5
15 dB  
8 dB  
15 dB  
8 dB  
0.75  
0.50  
0.25  
0
4 dB  
2 dB  
1 dB  
4 dB  
2 dB 1 dB  
-0.25  
-0.50  
-0.75  
-1.00  
0
-5  
-10  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
Frequency (GHz)  
Frequency (GHz)  
Attenuation Accuracy  
vs. Frequency (85˚C)  
Attenuation Phase Accuracy  
vs. Frequency (85˚C)  
1.00  
0.75  
0.50  
0.25  
0
30  
25  
20  
15  
10  
5
15 dB  
8 dB  
15 dB  
8 dB  
4 dB  
2 dB  
1 dB  
2 dB  
1 dB  
4 dB  
-0.25  
-0.50  
-0.75  
-1.00  
0
-5  
-10  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
Frequency (GHz)  
Frequency (GHz)  
Attenuation Accuracy  
Attenuation Phase Accuracy  
vs. Frequency (-40˚C)  
vs. Frequency (-40˚C)  
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 0.5–2.5 GHz  
AA226-87  
Typical Performance Data (0, +3 V)  
0
-0.5  
-1.0  
-1.5  
1.00  
0.75  
0.50  
0.25  
0
15 dB  
8 dB  
4 dB  
-40˚C  
2 dB  
1 dB  
+25˚C  
+85˚C  
-2.0  
-2.5  
-3.0  
-3.5  
-0.25  
-0.50  
-0.75  
-1.00  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0
0
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
3.0  
3.0  
Frequency (GHz)  
Frequency (GHz)  
Insertion Loss vs. Frequency  
Attenuation Accuracy  
vs. Frequency (25˚C)  
2.50  
2.25  
2.00  
1.75  
1.50  
1.25  
1.00  
1.00  
0.75  
0.50  
0.25  
0
15 dB  
8 dB  
4 dB  
15 dB  
8 dB  
4 dB  
2 dB  
1 dB  
2 dB  
1 dB  
-0.25  
-0.50  
-0.75  
-1.00  
-1.25  
Ins. Loss  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0.5  
1.0  
1.5  
2.0  
2.5  
Frequency (GHz)  
Frequency (GHz)  
VSWR vs. Frequency (25˚C)  
Attenuation Accuracy  
vs. Frequency (85˚C)  
1.00  
0.75  
0.50  
0.25  
0
30  
25  
20  
15  
10  
5
15 dB  
8 dB  
15 dB  
8 dB  
4 dB  
2 dB  
1 dB  
4 dB  
-0.25  
-0.50  
-0.75  
-1.00  
0
1 dB  
2 dB  
-5  
-10  
0
0.5  
1.0  
1.5  
2.0  
2.5  
3.0  
0.5  
1.0  
1.5  
2.0  
2.5  
Frequency (GHz)  
Frequency (GHz)  
Attenuation Phase Accuracy  
Attenuation Accuracy  
vs. Frequency (25˚C)  
vs. Frequency (-40˚C)  
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 0.5–2.5 GHz  
AA226-87  
56  
Compression Point vs. Attenuation,  
Voltage, and Temperature  
55  
54  
53  
52  
51  
50  
49  
48  
47  
46  
+85˚C  
+25˚C  
Input Power @ 1 dB Compression  
+
Voltage (V) 25°C (dBm) +85°C (dBm) -40°C (dBm)  
Attenuation Control  
State  
Ins. Loss  
3
3
3
3
3
3
24.5  
25.2  
25.0  
31.2  
28.3  
26.6  
24.1  
24.8  
24.3  
30.4  
26.3  
24.8  
24.6  
25.2  
24.9  
32.8  
29.2  
27.5  
1 dB  
2 dB  
4 dB  
8 dB  
15 dB  
-40˚C  
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15  
Attenuation (dB)  
IP3 vs. Attenuation and  
Temperature (500 MHz)  
Pin Out  
J1  
CBL  
GND  
8 dB  
Truth Table  
GND  
V1  
GND  
GND  
GND  
GND  
GND  
GND  
V
V
2
V
V
4
1
3
4 dB  
2 dB  
1 dB  
Attenuation  
J –J  
V2  
8 dB  
4 dB  
2 dB  
1 dB  
1
2
V3  
V
V
V
V
V
V
V
High  
Reference I.L.  
High  
High  
High  
High  
High  
High  
V4  
V
V
V
0
1 dB  
2 dB  
High  
GND  
GND  
0
V
V
V
VS  
High  
High  
High  
10 kΩ  
0
V
V
4 dB  
High  
High  
CBL  
0
V
High  
8 dB  
High  
High  
J2  
0
0
0
0
15 dB Max. Atten.  
DC blocking capacitors (CBL) and biasing resistor must be supplied externally  
for positive voltage operation.  
VHigh = +3 to +5 V (VS = VHigh ± 0.2 V).  
CBL = 47 pF for operation >500 MHz.  
Absolute Maximum Ratings  
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  
Storage Temperature  
-40°C to +85°C  
-65°C to +150°C  
Note: Exceeding these parameters may cause irreversible damage.  
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  

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