Digital Attenuator, 1 Bit, Variable Step, 10 - 20 dB, DC - 3000 MHz
AT-246
AT-246
Digital Attenuator, 1 Bit, Variable Step
10 - 20 dB, DC - 3000 MHz
Features
MSOP-81
•
•
•
•
•
•
Variable Step (10 - 20 dB) with an External Resistor
Matched Input and Output
Low Intermodulation Product: +53 dBm IP3
Low DC Power Consumption: 50 µW
Low Cost, Low Profile MSOP 8 Plastic Package
Tape and Reel Packaging Available
R
.010
ID P IN
0.007
4X
12°
0.118
0.193
0.0215
.020
0.0256
.020
Description
M/A-COM’s 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’s, GPS equipment
and other gain/level control circuits.
0.118
4X 12°
3°
0.040
0.034
0.008
0.013
1. Dimensions are in inches.
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.
Ordering Information
Part Number
Package
AT-246 PIN
AT-246TR
MSOP-8 Lead Plastic
Forward Tape and Reel1
1. If specific reel size is required, consult factory for part number
assignment.
Electrical Specifications: TA = +25°C1, 2
Parameter
Reference Insertion Loss
Attenuation Flatness
Test Conditions
Units
dB
dB
Min.
Typ.
0.8
±0.5
±1.5
1.3:1
24
Max.
1.0
±1.0
±2.0
DC - 3.0 GHz
DC - 1.5 GHz
1.5 - 3.0 GHz
DC - 3.0 GHz
Input Power
Input Power
dB
VSWR
1 dB Compression
50 MHz
500 MHz
dBm
dBm
30
10% to 90% RF, 90% to 10% RF
50% Control to 90% RF, Control to 10% RF
In-band
20
23
25
54
73
45
55
Trise, Tfall
Ton, Toff
Transients
IP2
µS
µS
mV
dBm
dBm
dBm
dBm
Measured Relative
to Input Power2
Measured Relative
to Input Power2
50 MHz
500 MHz
50 MHz
IP3
500 MHz
1. All measurements in a 50Ω system unless otherwise specified. Loss varies at 0.003 dB/°C.
2. For two-tone Input Power up to +5 dBm.
V2.00
M/A-COM Division of AMP Incorporated Q North America: Tel. (800) 366-2266, Fax (800) 618-8883 Q Asia/Pacific: Tel.+85 2 2111 8088, Fax +85 2 2111 8087
Q 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.