MACOM AT-118TR, AT-118 Datasheet
Voltage Variable
Absorpti ve Atten uator
Features
• Single Positive Control 0 to 3 Volts
• 15 dB Voltage Variable Attenuation
• ± 2 dB Linearity from BSL
• Positive Control Logic
• Low Cost MSOP-8 Plastic Package
MSOP-8
ID P IN
0.118
0.193
AT-118
1
.010R
0.007
4X
12°
0.021
3°
0.040
Description
M/A-COM’s AT-118 is a linear GaAs MMIC voltage variable
absorptive attenuator in a low cost MSOP-8 surface mount
plastic package. The AT-118 is ideally suited for applications
.02 0
.020
12°4X
0.034
0.0256
0.118
where linear attenuation and fine tuning are required.
Typical applications include radio, cellular, GPS equipment and
automatic gain/level control circuits.
0.013
1. Dimensi ons are in inches.
0.008
The AT-118 is fabricated with a mature 1 micron gate length
GaAs MESFET process. The process features full chip
passivation for increased performance and reliability.
Ordering Information
Part Number Package
AT-118 PIN MSOP 8-Lead Plastic
1
Electrical Specifications: TA = +25°C
AT-118TR Forward Tape and Reel
1. Reference Application Note M513 for reel size information.
1
====
Parameter Test Conditions Units Min. Typ. Max.
Insertion Loss 0.5 - 3.0 GHz dB 1.6 1.9
Attenuation 0.5 - 1.0 GHz dB 12 14
1.0 - 3.0 GHz dB 15 16
Insertion Loss Flatness (Peak-to-Peak) 0.5 - 3.0 GHz dB ±0.3 ±0.5
VSWR 0.5 - 3.0 GHz 2:1
T
, T
rise
fall
Ton, T
off
Transients
1. All measurements taken at 900 GHz in a 50Ω system unless otherwise specified. Loss varies at 0.003 dB/°C.
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
µS
µS
In-band mV 10
10
12
Specifications subject to change without notice.
North America: Tel. (800) 366-2266, Fax (800) 618-8883
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
Europe: Tel. +44 (1344) 869 595, Fax+ 44 (1 34 4) 30 0 020
Visit www.macom . com for ad di tional data sheets and pr o d uct i nf orm ation.
V 4.0
1
Q
Voltage Variable Absorptive Attenuator
AT-118
Absolute Maximum Ratings
1
Parameter Absolute Maximum
Maximum Input Power +21 dBm
Supply Voltage V
Control Voltage V
CC
C
-1V, +8V
-1V, VCC +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.
Typical Performance Curves
Insertion Loss vs. Frequency Attenuation vs. Control Voltage
0
-0.2
-0.4
-0.6
-0.8
-1
-1.2
LOSS (dB)
-1.4
-1.6
-1.8
-2
0.5 1 1.5 2 2.5 3
FREQUENCY (GHz)
Functional Schematic
GND
RF
GND
1. VCC = +3 VDC @ 20 µA max.
2. V
3. External DC blocking capacitors are required on all RF ports.
4. 39 pF used for data measurements.
-10
-12
-14
CONTROL VOLTAGE
ATTENUATION (dB)
-16
-18
1
2
Vcc
3
4
= 0 VDC to +3 VDC @ 75 µA max.
C
0
-2
-4
-6
-8
CONTROL VOLTAGE (Volts)
1, 2, 3
1.8 GHz
ATTENUATION (dB)
8
7
6
5
900 MHz
GND
RF
Vc
GND
2.4 GHz
00.511.522.53
Attenuation vs. Frequency @ Vc = 0V
0
-2
-4
-6
-8
-10
-12
-14
ATTENUATION (dB)
-16
-18
0.511.522.53
FREQUENCY (GHz)
Specifications subject to change without notice.
North America: Tel. (800) 366-2266, Fax (800) 618-8883
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
Europe: Tel. +44 (1344) 869 595, Fax+ 44 (1 34 4) 30 0 020
Visit www.macom . com for ad di tional data sheets and pr o d uct i nf orm ation.
Typical Device Variation
0
-2
-4
-6
-8
-10
-12
-14
ATTENUATION (dB)
-16
-18
CONTROL VOLTAGE (Volts)
F = 900 MHz
00.511.522.53
CONTROL VOLTAGE
V 4.0
2
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