鈥?/div>
Variable Step (10 - 20 dB) with an External Resistor
Matched Input and Output
Low Intermodulation Product: +53 dBm IP
3
Low DC Power Consumption: 50 碌W
Low Cost, Low Profile MSOP 8 Plastic Package
Tape and Reel Packaging Available
MSOP-8
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R .0 1 0
ID P IN
0 .0 0 7
0 .1 1 8
4X 12擄
0 .1 9 3
Description
M/A-COM鈥檚 AT-246 is a GaAs MMIC matched 1 bit attenuator
in a low cost plastic MSOP-8 package. It is designed to be a
building block for a single step attenuator by placing a resistor
across RF1-RF2. Attenuation levels of 10 to 20 dB with flat
response are achievable from DC to 3 GHz. The AT-246 is
ideally suited for circuits where fast switching, very low power
consumption and low intermodulation products are required.
Typical applications include gain/level and sensitivity control in
radio and cellular equipment, wireless LAN鈥檚, GPS equipment
and other gain/level control circuits.
The AT-246 is fabricated using a mature 1-micron gate length
GaAs MESFET process. The process features full chip passiva-
tion for increased performance and reliability.
.0 2 0
.0 2 0
0 .1 1 8
4X 12擄
0 .0 2 5 6
0 .0 2 1 5
3擄
0 .0 3 4
0 .0 1 3
0 .0 0 8
0 .0 4 0
1.
Dimensions are in inches.
Ordering Information
Part Number
AT-246 PIN
AT-246TR
Package
MSOP-8 Lead Plastic
Forward Tape and Reel
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1. If specific reel size is required, consult factory for part number
assignment.
Electrical Specifications: T
A
= +25擄C
Parameter
Reference Insertion Loss
Attenuation Flatness
VSWR
1 dB Compression
T
rise
,
T
fall
T
on
,
T
off
Transients
IP
2
IP
3
1.
2.
1, 2
Test Conditions
DC - 3.0 GHz
DC - 1.5 GHz
1.5 - 3.0 GHz
DC - 3.0 GHz
Input Power
50 MHz
Input Power
500 MHz
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
Measured Relative
50 MHz
500 MHz
to Input Power
2
Measured Relative
50 MHz
2
500 MHz
to Input Power
Units
dB
dB
dB
dBm
dBm
碌S
碌S
mV
dBm
dBm
dBm
dBm
Min.
Typ.
0.8
鹵0.5
鹵1.5
1.3:1
24
30
20
23
25
54
73
45
55
Max.
1.0
鹵1.0
鹵2.0
All measurements in a 50鈩?system unless otherwise specified. Loss varies at 0.003 dB/擄C.
For two-tone Input Power up to +5 dBm.
V2.00
M/A-COM Division of AMP Incorporated
3
North America: Tel. (800) 366-2266, Fax (800) 618-8883
3
Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
3
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
www.macom.com
AMP and Connecting at a Higher Level are trademarks.
Specifications subject to change without notice.
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