AT-220 Datasheet, PDF (2/6 Pages) Tyco Electronics – Digital Attenuator, 30 dB, 4-Bit DC - 2 GHz

AT-220 11/15/96 1:49 PM Page 2 (Black plate)
Digital Attenuator, 30 dB, 4-Bit
AT-220
V3.00
Absolute Maximum Ratings¹
Parameter
Max. Input Power
50 MHz
500-2000 MHz
Control Voltage
Operating Temperature
Storage Temperature
Absolute Maximum
+27 dBm
+34 dBm
+5V, -8.5V
-40°C to +85°C
-65°C to +150°C
1. Operation of this device above any one of these parameters may
cause permanent damage.
Functional Schematic
RF1 GNDGND GND GND GND GND RF2
16 15 14 13 12 11 10 9
8 dB 4 dB
2 dB
1 dB
1 21 32 43 5 6 7 80
VC1 VC1 VC2 VC2 VC3 VC3 VC4 VC4
Pin Configuration
Pin Description
1
VC1
2
VC1
3
VC2
4
VC2
5
VC3
6
VC3
7
VC4
8
VC4
Pin No.
9
10
11
12
13
14
15
16
Description
RF2
GND
GND
GND
GND
GND
GND
RF1
Typical Performance
INSERTION LOSS vs FREQUENCY
3.0
+ 85˚C
2.0
Truth Table
Control Inputs
VC4 VC4 VC3 VC3 VC2 VC2 VC1 VC1 ^Attenuation
(dB)
1 0 1 0 1 0 1 0 Reference
01 10 1 010
2 dB
10 01 1 010
4 dB
10 10 0 110
8 dB
10 1 0 1 0 0 1
16 dB
01 01 0 101
30 dB
"0" = Vin Low, Vin Low = 0V, "1" = Vin High, Vin High = -5V
"0" = 0 to -0.2V @ 20␮A Max
"1" = -5V @ 10 ␮A typ to -8V @ 200 ␮A Max
ATTENUATION ACCURACY vs FREQUENCY
1.5
1
2 dB ATTEN
16 dB ATTEN
8 dB ATTEN
0.5
1.0 _{+ 25˚C}
- 40˚C
0
0
0.5
1.0
1.5
2.0
FREQUENCY (GHz)
0
4 dB ATTEN
-0.5
30 dB ATTEN
-1
-1.5
0.0
0.5
1.0
1.5
2.0
FREQUENCY (GHz)
VSWR vs FREQUENCY
2.0
1.8
4 dB ATTEN
1.6
16 dB ATTEN
2 dB ATTEN
1.4
1.2
1.0
0
INSERTION LOSS
8 dB ATTEN
0.5
1.0
1.5
2.0
FREQUENCY (GHz)
ATTENUATION vs FREQUENCY
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
0.0
0.5
1.0
1.5
2.0
FREQUENCY (GHz)
Specifications Subject to Change Without Notice.
2
North America: Tel. [phone]
Fax [phone]
s Asia/Pacific: Tel. [phone]
Fax [phone]
M/A-COM, Inc.
s Europe: Tel. [phone]
Fax [phone]