MACOM AT-119TR-3000, AT-119TR, AT-119SMB Datasheet
2.25 Volt Voltage Variable Absorptive
Attenuator - 40 dB, 1.8—2.5 GHz
AT-119
Features
Single Positive Voltage Control 0 to +2.25 Volts
>50 dB Attenuation Range at 2.1 GHz
Low DC Power Consumption
Low Cost SOT-25 Plastic Package
Tape and Reel Packaging Available
Description
M/A-COM’s AT-119 is a GaAs MMIC voltage variable
absorptive attenuator in a low cost, SOT-25 five-lead,
surface mount plastic package. M/A-COM fabricates the
AT-119 with a proven monolithic GaAs self-aligned gate
process that features full chip passivation for performance
and reliability
Applications
The AT-119 is ideally suited for applications that require
fine tuning, linear attenuation with voltage, and very low
power consumption.
Typical applications for the AT-119 include automatic gain
control circuits in satellite radio receivers and other wireless
receivers.
Functional Schematic
VCC
5
1
RF
100 pF
1. VCC = +3.3 VDC @ 50 µA max.
= 0 VDC to +3.3 VDC @ 50 µA max.
2. V
CTL
3. External DC blocking capacitors are required on all RF
ports.
2
GND
Absolute Maximum Ratings
@ TA = +25 °C (unless otherwise specified)
Parameter Absolute Maximum
V
CTL
4
100 pF
3
RF
1
Maximum Input Power +21 dBm
Supply Voltage V
ControlVoltage V
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.
CC
CTL
-1 V, + 8 V
-1 V, VCC +0.5 V
Electrical Specifications @ TA = +25 °C, Frequency = 2.4 GHz, VCC = 3.3 V
Parameters Test Conditions Units Min Typ Max
Minimum Insertions Loss V
Maximum Attenuation V
Attenuation Slope 0.75 VDC < V
Return Loss 0.6 VDC < V
Input Power for 1 dB Change in Attenua-
tion
Input 3rd Order Intercept Point 0 VDC < V
Switching Speed 50% V
Transients mV 10 V
1. All measurements in a 50-τ system unless otherwise specified. The RF ports must be blocked outside of the package from
ground or any other voltage.
0 VDC < V
= 2.25 VDC dB 3.0 3.2
CTL
= 0.5 VDC dB 37
CTL
< 1.75 VDC dB/V 24
CTL
< 1.75 VDC dB >12
CTL
< 3.0 VDC dBm >10
CTL
< 3.0 VDC dBm >20
CTL
to 10% / 90% RF nSec 180
CTL
CTL
= 3 V
In-Band
DC,
DC
1
2.25 Volt Voltage Variable Absorptive Attenuator, 40 dB, 1.8 - 2.5 GHz
Typical Performance Curves
AT-119
Attenuation vs. Control Voltage, +25 °C
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
2.4 GHz
2.1 GHz
CONTROL VOLTAGE (Volts)
Insertion Loss vs. Frequency @ 2.25
for Control Voltage
V
DC
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
500 1000 1500 2000 2500 3000
+85 deg C
+25 deg C
-40 deg C
FREQUENCY (MHz)
Attenuation vs. Frequency @ 0.0 V
DC
for Control Voltage
0
5
10
15
20
25
30
35
40
45
50
55
0.00.51.01.52.02.53.0
60
500 1000 15 00 2000 2500 3000
+85 deg C
+25 deg C
-40 deg C
FREQUENCY (MHz)
Return Loss vs. Control Voltage
@ +25 °C
0
-5
-10
-15
-20
-25
-30
2.4 GHz
1.8 GHz
2.1 GHz
0.00.51.01.52.02.53.0
CONTRO L VO LTAG E (VDC)
Insertion Loss Delta Normalized
to +25 °C
6
o
C
-40
4
2
0
-2
-4
-6
2.1 GHz
CONTROL VOLTAGE (VDC)
Specifications subject to change without notice.
North America: Tel. (800) 366-2266
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
1.8 GHz
2.4 GHz
Insertion Loss Delta Normalized
to +25 °C
6
o
C
+85
4
2
0
-2
-4
0.00.51.01.52.02.53.0
-6
2.1 GHz
CONTROL VOLTAGE (VDC)
1.8 GHz
2.4 GHz
0.00.51.01.52.02.53.0
2
Loading...