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AA239-12 [SKYWORKS]

Variable Attenuator, 750MHz Min, 2000MHz Max, 2.1dB Insertion Loss-Max, PLASTIC, SOIC-8;
AA239-12
型号： AA239-12
厂家： SKYWORKS SOLUTIONS INC.    SKYWORKS SOLUTIONS INC.
描述：

Variable Attenuator, 750MHz Min, 2000MHz Max, 2.1dB Insertion Loss-Max, PLASTIC, SOIC-8

衰减器 射频 微波
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GaAs IC 3 Bit Digital Attenuator  
4 dB LSB Positive Control 0.75–2 GHz  
AA239-12  
(Previously AD239-12)*  
Features  
■ Attenuation in 4 dB Steps to 28 dB  
with High Accuracy  
SOIC-8  
PIN 8  
0.050 (1.27 mm) BSC  
■ Single Positive Control Voltage  
0.244 (6.20 mm)  
0.228 (5.80 mm)  
PIN 1  
INDICATOR  
for Each Bit  
■ +3 V to +5 V Operation  
0.020 (0.51 mm) MAX.  
PIN 1  
■ Small Low Cost SOIC-8 Plastic Package  
0.016 MAX.  
(0.41 mm) x  
45˚ CHAMFER  
0.049  
(1.24 mm)  
0.016  
0.068  
(1.73 mm) MAX.  
Description  
(0.41 mm)  
The AA239-12 is a 3 bit, single positive control, 4 dB step  
GaAs IC FET digital attenuator in a low cost SOIC-8 plastic  
package. For positive operation external DC blocking  
capacitors are required on all RF ports.  
8˚  
MAX.  
0.197 (5.00 mm)  
0.189 (4.80 mm)  
0.158 (4.00 mm)  
0.150 (3.80 mm)  
0.010 (0.25 mm)  
0.007 (0.17 mm)  
0.010 (0.25 mm)  
0.004 (0.10 mm)  
The AA239-12 is particularly suited where high  
attenuation accuracy, low insertion loss and low  
intermodulation products are required.  
Typical applications include cellular, radio, wireless  
data, wireless local loop and other gain level control  
circuits.  
Electrical Specifications at 25°C (0, +3 V)  
1
2
Parameter  
Frequency  
Min.  
Typ.  
1.8  
Max.  
Unit  
dB  
2
Insertion Loss  
0.75–2.0 GHz  
0.75–2.0 GHz  
0.75–1.0 GHz  
2.1  
Attenuation Range  
28  
dB  
3
Attenuation Accuracy  
(0.2 + 3% of  
dB  
Attenuation Setting in dB)  
(0.3 + 3% of  
Attenuation Setting in dB)  
0.75–2.0 GHz  
0.75–2.0 GHz  
dB  
VSWR (I/O)  
1.5:1  
2.0:1  
Operating Characteristics at 25°C (0, +3 V)  
Parameter  
Condition  
Frequency  
Min.  
Typ.  
Max.  
Unit  
4
Switching Characteristics  
Rise, Fall (10/90% or 90/10% RF)  
On, Off (50% CTL to 90/10% RF)  
Video Feedthru  
0.7  
1.0  
50  
µs  
µs  
mV  
Input Power for 1 dB Compression  
Intermodulation Intercept Point (IP3)  
V
V
= +3 V  
= +5 V  
0.75–2.0 GHz  
0.75–2.0 GHz  
+20  
+26  
dBm  
dBm  
S
S
For Two-tone Input Power +10 dBm  
V
S
V
S
= +3 V  
= +5 V  
0.75–2.0 GHz  
0.75–2.0 GHz  
+32  
+45  
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. Attenuation referenced to insertion loss.  
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. Insertion loss changes by 0.003 dB/°C.  
*Due to conflict with another company’s product numbering system, Alpha’s attenuator products starting with the letters “AD” are being changed to “AA”.  
Skyworks Solutions, Inc. [978] 241-7000 • Fax [978] 241-7906 • Email sales@skyworksinc.com • www.skyworksinc.com  
1
Specifications subject to change without notice. 12/99A  
GaAs IC 3 Bit Digital Attenuator 4 dB LSB Positive Control 0.75–2 GHz  
AA239-12  
Typical Performance Data (0, +3 V)  
6
5
4
3
2
1
0
2.0  
1.5  
1.0  
0.5  
0
0.5  
1.0  
1.5  
2.0  
0.5  
1.0  
1.5  
2.0  
2.5  
Frequency (GHz)  
Frequency (GHz)  
Insertion Loss vs. Frequency  
VSWR vs. Frequency (All States)  
30  
Absolute Maximum Ratings  
25  
20  
15  
10  
5
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.  
0
0.5  
1.0  
1.5  
2.0  
2.5  
Pin Out  
Frequency (GHz)  
VS  
Attenuation vs. Frequency (All States)  
10 kΩ  
CBL  
8
dB  
J1  
GND  
V3  
Truth Table  
V
1
V
V
3
2
V2  
Attenuation  
J –J  
4
dB  
16 dB  
4 dB  
8 dB  
1
2
V
V
V
Ins. Loss  
4 dB  
GND  
CBL  
GND  
V1  
High  
High  
High  
V
V
V
0
V
High  
High  
High  
16  
dB  
J2  
V
V
V
0
8 dB  
High  
0
0
12 dB  
16 dB  
20 dB  
24 dB  
28 dB  
High  
0
V
V
DC blocking capacitors (CBL) and biasing resistor must be supplied externally  
for positive operation.  
High  
High  
0
0
0
0
High  
CBL = 100 pF for operation >.75 GHz.  
0
High  
0
0
VHigh = +3 to +5 V (VS = VHigh 0.2 V).  
2
Skyworks Solutions, Inc. [978] 241-7000 • Fax [978] 241-7906 • Email sales@skyworksinc.com • www.skyworksinc.com  
Specifications subject to change without notice. 12/99A  

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