AT-264 Datasheet, PDF (2/2 Pages) Tyco Electronics – Digital Attenuator, 4 Bit, Single Control 30 dB, 0.5 - 2.0 GHz

Digital Attenuator, 4 Bit, Single Control, 30 dB, 0.5 - 2.0 GHz
Absolute Maximum Ratings¹
Parameter
Absolute Maximum
Input Power
50 MHz
500 - 2000 MHz
Control Voltage
+27 dBm
+34 dBm
+8.5V, -0.5V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
1. Exceeding any one or a combination of these limits may cause
permanent damage.
Functional Schematic^{1, 2}
Vs
RF1 GND GND GND GND GND GND RF2
PIN 16
16
8
4
2
AT-264
Truth Table
VC1 VC2 VC3 VC4
1
1
1
1
1
1
1
0
1
1
0
1
1
0
1
1
0
1
1
1
0
0
0
0
Logic 0=0±0.2V
Logic 1 = +5v @ 30 µA max. current total.
Attenuation (dB)
Reference I.L.
2
4
8
16
30
PIN 1
GND GND VC1 VC2 VC3 VC4 GND GND
1. Blocking Caps are required on all RF ports, 39 pF used for data
measurements.
2. Vs = +5+0.2Vdc can be applied at RF1 or RF2 using a 10K or
greater pull-up resistor.
Typical Performance Curves
Insertion Loss vs. Frequency
2.5
2
1.5
1
0.5
0
0.5
1
1.5
2
2.5
3
FREQUENCY (G Hz)
Attenuation vs. Frequency
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
-32
0.5
1
1.5
2
2.5
3
FREQUENCY (GHz)
VSWR vs. Frequency
2.8
2.6
2.4
16, 30 dB ATTEN
2.2
2
1.8
2 dB ATTEN
1.6
1.4
1.2
IL
1
0.5
1
1.5
2
2.5
3
FREQUENCY (GHz)
Attenuation Accuracy vs. Frequency
1.5
30 dB ATTEN
16 dB ATTEN
1
2 dB ATTEN
0.5
0
-0.5
8 dB ATTEN
4 dB
-1
-1.5
0.5
1
1.5
2
2.5
3
FREQUENCY (GHz)
M/A-COM Division of AMP Incorporated 3 North America: Tel. [phone], Fax [phone] Asia/Pacific: Tel.[phone], Fax [phone]
3 Europe: Tel. [phone], Fax[phone]
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
V3.00