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Tape and Reel Packaging Available
V1
Description
M/A-COM鈥檚 AT-267 is a 1 bit, 15 dB step GaAs MMIC
digital attenuator in a low cost SOT-25 5 lead surface
mount plastic package. The AT-267 is ideally suited for
use where high accuracy, very low power consumption and
low intermodulation products are required.
Typical applications include wireless handsets, base
stations, wireless LAN equipment, GPS receivers and any
RF applications with automatic gain/level control circuits.
The AT-267 is fabricated as a monolithic GaAs integrated
circuit using a proven self-aligned gate process. The
process features full chip passivation for performance and
reliability.
PIN 1
RF1
GND
RF2
Positive Control Voltage
V2
5
V1
4
Truth Table
1, 2, 3
Mode
(Control)
Positive
1
Postitive/
Negative
1,2
Negative
3
V1
0 鹵 0.2 V
+2.5 V to +5 V
-Vc 鹵 0.2 V
+Vc
0 鹵 0.2 V
-2.5 V to -5 V
V2
+2.5 V to +5 V
0 鹵 0.2 V
+Vc
-Vc 鹵 0.2 V
-2.5 V to -5 V
0 鹵 0.2 V
Atten
15 dB
IL
15 dB
IL
IL
15 dB
1
39 pF
39 pF
2
3
39 pF
RF1
GND
RF2
1. External DC blocking capacitors are required as noted*
2. |-Vc|+ Vc
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8 V
3. If negative control is used, DC blocking capacitors are not
required on RF Ports and Ground.
Absolute Maximum Ratings
1
Parameter
Maximum Input Power
Control Voltage V
CTL
Operating Temperature
Storage Temperature
Absolute Maximum
+21 dBm
-8 V
-40擄 C to +85擄 C
-65擄 C to +150擄 C
1. Exceeding any one or a combination of these limits may
cause permanent damage.
1
2
3
