AA264-87 Datasheet, PDF (5/5 Pages) Alpha Industries – GaAs IC 4 Bit Digital Attenuator 2 dB LSB Positive Control 0.5-2 GHz

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
V_High
V_High
V_High
V_High
0
0
V_High
V_High
V_High
0
V_High
0
V_High
V_High
0
V_High
V_High
0
V_High = +3 to +5 V (V_S = V_High ± 0.2 V).
V₄
2 dB
V_High
0
V_High
V_High
V_High
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
J1
GND
GND
GND
GND
GND
GND
VS
10 kΩ
CBL
J2
DC blocking capacitors (C_BL) and biasing resistor must be supplied externally
for positive voltage operation.
C_BL = 47 pF for operation >500 MHz.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com
5
Specifications subject to change without notice. 9/00A