GaAs IC 4 Bit Digital Attenuator 1 dB LSB Positive Control 0.5–3.0 GHz
AA105-86
57
56
55
54
53
52
51
50
49
48
47
46
45
+85˚C
+25˚C
-40˚C
Compression Point vs. Attenuation,
Voltage, and Temperature
Input Power @ 1 dB Compression
Attenuation Control
State
Voltage (V) +25°C (dBm) +85°C (dBm) -40°C (dBm)
Ins. Loss
3
24.7
24.2
24.4
1 dB
2 dB
4 dB
8 dB
3
3
3
3
3
25.2
24.8
31.1
25.1
24.9
24.9
24.2
30.5
25.9
24.4
25.0
24.7
31.9
27.3
27.0
IP3 (dBm)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
15 dB
Attenuation (dB)
IP3 vs. Attenuation and
Temperature (500 MHz)
Pin Out
V
1
V
2
8 dB
4 dB
2 dB
1 dB
10
C
BL
J
1
1
Truth Table
V
1
8 dB
V
High
V
High
V
High
V
High
0
0
V
2
4 dB
V
High
V
High
V
High
0
V
High
0
V
3
2 dB
V
High
V
High
0
V
High
V
High
0
V
4
1 dB
V
High
0
V
High
V
High
V
High
0
Attenuation
J
1
–J
2
Reference I.L.
1 dB
2 dB
4 dB
8 dB
15 dB Max. Atten.
V
3
V
4
GND
GND
GND
GND
C
BL
J
2
2
9
3
8
4
7
5
10 kΩ
V
S
DC blocking capacitors (C
BL
) and biasing resistor must be supplied
externally for positive voltage operation.
C
BL
= 47 pF for operation >500 MHz.
6
V
High
= +3 to +5 V (V
S
= V
High
± 0.2 V).
Absolute Maximum Ratings
Characteristic
RF Input Power
Supply Voltage
Control Voltage
Operating Temperature
Storage Temperature
Value
1 W > 500 MHz 0/8 V
0.5 W @ 50 MHz 0/8 V
+8 V
-0.2 V, +8 V
-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
Specifications subject to change without notice. 9/00A
5
ALPHA [ ALPHA INDUSTRIES ]
