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PDF AA280-25 Data sheet ( Hoja de datos )
| Número de pieza | AA280-25 | |
| Descripción | GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC-2 GHz | |
| Fabricantes | Alpha Industries | |
| Logotipo |  |
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GaAs IC 5 Bit Digital Attenuator
0.5 dB LSB DC–2 GHz
Features
I Attenuation 0.5 dB Steps to 15.5 dB
with High Accuracy
I Low DC Power Consumption
I Low Cost SOIC-16 Plastic Package
SOIC-16
PIN 16
PIN 1
INDICATOR
AA280-25
(Previously AD280-25)*
0.050
(1.27 mm) BSC
0.244 (6.20 mm)
0.228 (5.80 mm)
Description
The AD280-25 is a 5 bit, GaAs IC FET digital attenuator
in a low cost SOIC-16 package. This attenuator has an
LSB of 0.5 dB and a total attenuation of 15.5 dB.
The AD280-25 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.
PIN 1
0.068
(1.73 mm) MAX.
0.020 (0.51 mm)
0.013 (0.33 mm)
0.049 (1.24 mm)
0.016 (0.41 mm)
0.016 MAX.
(0.41 mm)
x 45˚
CHAMFER
8˚ MAX.
0.394 (10.00 mm)
0.386 (9.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.0098 (0.25 mm)
0.0075 (0.19 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
Electrical Specifications at -40°C to +85°C (0, -5 V)
Parameter1
Insertion Loss3
Condition
Frequency2
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
Min.
Typ.
1.1
1.4
1.7
Max.
1.3
1.7
2.0
Unit
dB
dB
dB
Attenuation Range
Attenuation Accuracy3
VSWR (I/O)4
Switching Characteristics5
Rise, Fall (10/90% or 90%/10% RF)
On, Off (50% CTL to 90%/10% RF)
Video Feedthru
DC–1.0 GHz
DC–2.0 GHz
DC–2.0 GHz
15.5
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.4 + 3% of
Attenuation Setting in dB)
1.4:1
1.8:1
15
25
25
dB
dB
dB
nS
nS
mV
Input Power for 1 dB Compression
0.5–2.0 GHz
0.05 GHz
+24
+17
+29
+22
dBm
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +5 dBm
0.5–2.0 GHz
0.05 GHz
+44
+35
+50
+40
dBm
dBm
Control Voltages
VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = -5 V @ 300 µA Max.
1. All measurements made in a 50 Ω system, unless otherwise specified.
2. DC = 300 kHz.
3. Attenuation referenced to insertion loss.
4. Input/Output
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
*Due to conflict with another company’s product numbering system, Alpha’s attenuator products starting with the letters “AD” are being changed to “AA”.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 11/00A
1
1 page  
GaAs IC 5 Bit Digital Attenuator 0.5 dB LSB DC–2 GHz
AA280-25
57
56
55
54 +85˚C
53
52
+25˚C
51
50
-40˚C
49
48
47
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Attenuation (dB)
IP3 vs. Attenuation and Temperature
Truth Table
V1
0.5 dB
Bit
-5
0
-5
-5
-5
-5
0
V2
1 dB
Bit
-5
-5
0
-5
-5
-5
0
V3 V4
2 dB
Bit
-5 0
-5 0
-5 0
0 -5
-5 0
-5 0
0 -5
V5 V6
4 dB
Bit
-5 0
-5 0
-5 0
-5 0
0 -5
-5 0
0 -5
V7 V8
8 dB
Bit
-5 0
-5 0
-5 0
-5 0
-5 0
0 -5
0 -5
Attenuation
J1–J2
Reference I.L.
0.5 dB
1 dB
2 dB
4 dB
8 dB
15.5 dB
Max. Atten.
Absolute Maximum Ratings
Characteristic
Value
RF Input Power
2.0 W > 500 MHz 0/-8 V
0.5 W > 50 MHz 0/-8 V
Control Voltage
+0.2 V, -8 V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
ΘJC 85°C/W
Note: Exceeding these ratings may cause irreversible damage.
Compression Point vs. Attenuation,
Voltage, and Temperature
Attenuation Control Input Power @ 1 dB Compression
State Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss
-3
22.70
23.30
24.20
0.5 dB
-3
23.50
24.20
25.10
1.0 dB
-3
24.60
25.00
25.90
2.0 dB
-3
22.90
23.40
24.30
4.0 dB
-3
31.60
31.80
33.10
8.0 dB
-3
31.00
28.70
26.40
15.5 dB
-3
25.00
24.40
25.00
Pin Out
J1 GND GND GND GND GND GND J2
16 15
14
13 12
11 10
9
8 dB
4 dB
2 dB 1 dB 0.5 dB
12
3
V8 V7 V6
45
V5 V4
67
V3 V2
8
V1
5 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 11/00A
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet AA280-25.PDF ] | |
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