鈥?/div>
Single Control CMOS Logic for each bit
Positive Supply +3 to +5 Volts
Low Cost SOIC-8 Plastic Package
Tape and Reel Packaging Available
SOIC-8
PIN 8
1
.1497/.1574
(3.80/4.00)
Oreintation
Mark
-B-
.2284/.2440
(5.80/6.20)
.010(.25) M B M
Description
M/A-COM鈥檚 AT-242 is a 3 bit, 4 dB step GaAs MMIC digital
attenuator in a low cost SOIC 8-lead surface mount plastic
package. The AT-242 is ideally suited for use where high
accuracy, very low power consumption and low intermodula-
tion products are required. Typical applications include radio,
cellular, wireless LANs, GPS equipment and automatic gain/
level control circuits.
The AT-242 is fabricated with a GaAs MMIC using a mature
1-micron process. The process features full chip passivation for
increased performance and reliability.
PIN 1
.1890/.1968
(4.80/5.00)
-A-
CHAMFER
(OPTIONAL)
.0040/.0098
(.10/.25)
-C-
0擄/80擄
.0532/.0688
(1.35/1.75)
.004(0.10)
.050(1.27)BSC.
.013/.020 (8 PL)
(.33/.51)
.010(.25) M C A M B S
.016/.050
(0.40/1.27)
.0075/.0098
(.19/.25)
1. Dimensions are in inches/mm.
Absolute Maximum Ratings
Parameter
Maximum Input Power
1
Absolute Maximum
+27 dBm
+34 dBm
-1V, +8V
-1V, Vsupply +0.5V
-40擄C to +85擄C
-65擄C to +150擄C
Ordering Information
Part Number
AT-242
AT-242TR
Package
SOIC-8 Lead Plastic
Forward Tape and Reel
1
50 MHz
500 - 2000 MHz
Supply Voltage
Control Voltage
Operating Temperature
Storage Temperature
1.
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 Accuracy
VSWR
P
1dB
T
rise
,
T
fall
T
on
,
T
off
Transients
IP
2
IP
3
1.
2.
1, 2
Exceeding any one or a combination of these limits may cause
permanent damage.
Units
Min.
Typ.
Max.
0.5 - 1.0 GHz
dB
1.4
1.6
0.5 - 2.0 GHz
dB
1.7
1.9
0.5 - 1.0 GHz
鹵 (0.15 dB +3% of Attenuation Setting in dB) dB
0.5 - 2.0 GHz
鹵 (0.3 dB = +8% of Attenuation Setting in dB) dB
0.5 - 1.0 GHz
1.3:1
鹵0.8
0.5 - 2.0 GHz
1.6:1
鹵1.5
Input Power (Vs = +5V) 900 MHz
dBm
25
10% to 90% RF, 90% to 10% RF
290
碌S
50% Control to 90% RF, Control to 10% RF
300
碌S
In-band
mV
260
2
Measured Relative to Input Power
dBm
75
2
Measured Relative to Input Power
dBm
45
Test Conditions
All measurements at 1 GHz 5Vdc in a 50鈩?system unless otherwise specified. The RF ports must be blocked out side of the package from
ground or any other voltage. Insertion Loss varies at 0.003 dB/擄C.
For two-tone input power up to +10 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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