AA104-73 Datasheet, PDF (4/4 Pages) Alpha Industries – GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz

GaAs IC 1 Bit Digital Attenuator 32 dB 2.5 GHz
AA104-73
Pin Out
Positive Voltage
J1 _CBL
CBP
RF
GND
J2
CBL
V2
32
NC/GND
V₁
C_BL = 47 pF for frequencies >500 MHz. See Table on previous page for
C_BP value.
See application notes APN2013 and APN2014 for 6 bit attenuator requirements.
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.
Truth Table
Positive Control
V₁
V_High
0
V_High = +3 to +5 V.
V₂
0
V_High
Attenuation
J₁–J₂
Reference I.L.
32 dB
Application: AA104-73 used as 1 Bit 20 dB Attenuator 25°C (0, +5 V)
J1
V2
CBL
CBP R_BP
RF
GND
J2
CBL
20
NC/GND
V₁
C_BL = 220 pF, C_BP = 100 pF, R_BP = 15 Ω, f_C = 400 MHz with select values of
C_BP and R_BP, center frequency and attenuation value respectively
can be varied.
2.50
2.25
2.00
1.75
1.50
1.25
S22 25˚C
S11 25˚C
-15
-16
-17
-18
-19
-20
-21
-22
20 dB 25˚C
-23
-24
-25
0
0.2
0.4
0.6
0.8
1.0
Frequency (GHz)
20 dB State vs. Frequency
C_BP = 100 pF, C_BL = 220 pF, R_BP = 15 Ω
1.00
0
0.2
0.4
0.6
0.8
1.0
Frequency (GHz)
VSWR vs. Frequency
20 dB State
4
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com
Specifications subject to change without notice. 5/00A