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PDF AA264-87 Data sheet ( Hoja de datos )
| Número de pieza | AA264-87 | |
| Descripción | GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5-2 GHz | |
| Fabricantes | Alpha Industries | |
| Logotipo |  |
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GaAs IC 4 Bit Digital Attenuator
2 dB LSB Positive Control 0.5–2 GHz
AA264-87
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
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 (VS) and four individual positive
control voltages (V1–V4). 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.
TSSOP-16
PIN 16
0.173 (4.40 mm)
± 0.004 (0.10 mm)
0.252 (6.4 mm)
BSC
PIN 1
INDICATOR
PIN 1
0.197 (5.00 mm)
± 0.004 (0.10 mm)
0.0256 (0.65 mm) 0.047 (1.20 mm)
BSC
MAX.
R 0.004 (0.09 mm)
MIN.
0.009 (0.22 mm) REF.
0.035 (0.90 mm)
+ 0.006 (0.15 mm) /
-0.004 (-0.10 mm)
0.006 (0.15 mm) MAX.
0.002 (0.05 mm) MIN.
0.024
(0.60 mm)
± 0.006
(0.15 mm)
Electrical Specifications at -40°C to +85°C (0, +5 V)
Parameter1
Condition
Frequency
Min. Typ.
Max. Unit
Insertion Loss
0.5–1.0 GHz
0.5–2.0 GHz
1.6 2.0 dB
1.8 2.4 dB
Attenuation Range
Attenuation Accuracy2
0.5–1.0 GHz
0.5–2.0 GHz
30
± (0.2 + 3% of
Attenuation Setting in dB)
± (0.3 + 5% of
2–24 dB Setting)
dB
dB
dB
VSWR (I/O)3
Switching Characteristics4
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
0.5–2.0 GHz
0.5–0.8 GHz
0.8–2.0 GHz
± (0.3 + 6% of
26–30 dB Setting)
1.8:1
1.5:1
150
300
70
2.2:1
2.0:1
dB
ns
ns
mV
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
VS = +3 V
VS = +5 V
0.5–2.0 GHz
0.5–2.0 GHz
For Two-tone Input Power +5 dBm
VS = +3 V
VS = +5 V
0.5–2.0 GHz
0.5–2.0 GHz
VLow = 0 to 0.2 V @ 20 µA Max.
VHigh = +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
VS = VHigh ± 0.2 V
+15 +21
+21 +27
+36 +44
+37 +45
dBm
dBm
dBm
dBm
1. All measurements made in a 50 Ω 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.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 9/00A
1
1 page  
GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5–2 GHz
AA264-87
57 +85˚C
55
+25˚C
53
51 -40˚C
49
47
45
43
41
39
37
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
Truth Table
V1
16 dB
V2
8 dB
V3
4 dB
VHigh
VHigh
VHigh
VHigh
0
0
VHigh
VHigh
VHigh
0
VHigh
0
VHigh
VHigh
0
VHigh
VHigh
0
VHigh = +3 to +5 V (VS = VHigh ± 0.2 V).
V4
2 dB
VHigh
0
VHigh
VHigh
VHigh
0
Attenuation
J1–J2
Reference I.L.
2 dB
4 dB
8 dB
16 dB
30 dB Max. Atten.
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
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
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
-40°C to +85°C
Storage Temperature
-65°C to +150°C
Note: Exceeding these parameters may cause irreversible damage.
Pin Out
GND
GND
V1
V2
V3
V4
GND
GND
16 dB
8 dB
4 dB
2 dB
CBL
GND
J1
GND
GND
GND
GND
GND
VS
10 kΩ
CBL
J2
DC blocking capacitors (CBL) and biasing resistor must be supplied externally
for positive voltage operation.
CBL = 47 pF for operation >500 MHz.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [email protected] • www.alphaind.com
Specifications subject to change without notice. 9/00A
5
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet AA264-87.PDF ] | |
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