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參數資料
| 型號： | AT-267TR-3000 |
| 英文描述： | Digital Attenuator, 1 Bit, 15 dB Step DC - 2.0 GHz |
| 中文描述： | 數字衰減器，1位，15 dB步區- 2.0吉赫 |
| 文件頁數： | 1/3頁 |
| 文件大小： | 81K |
| 代理商： | AT-267TR-3000 |
Features
Single 15 dB Step
Low Loss, 0.3 dB Typical @ 900 MHz
2.7 to 5.0 Volt Operation
Insertion Loss, Attenuation insensitive to Control
Voltage
Low Cost SOT-25 Plastic Package
Tape and Reel Packaging Available
Description
M/A-COM’s 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.
Digital Attenuator, 1 Bit, 15 dB Step
DC - 2.0 GHz
A
T-267
Functional Schematic
RF1
RF2
V1
V2
GND
PIN 5
PIN 1
Positive Control Voltage
Parameter
Absolute Maximum
Maximum Input Power
+21 dBm
Control Voltage VCTL
-8 V
Operating Temperature
-40° C to +85° C
Storage Temperature
-65° C to +150° C
Absolute Maximum Ratings
1
1. Exceeding any one or a combination of these limits may
cause permanent damage.
Mode
(Control)
V1
V2
Atten
Positive
1
0 ± 0.2 V
+2.5 V to +5 V
0 ± 0.2 V
15 dB
IL
Postitive/
Negative
1,2
-Vc ± 0.2 V
+Vc
-Vc ± 0.2 V
15 dB
IL
Negative
3
0 ± 0.2 V
-2.5 V to -5 V
0 ± 0.2 V
IL
15 dB
Truth Table
1, 2, 3
1. External DC blocking capacitors are required as noted*
2. |-Vc|+ Vc
8 V
3. If negative control is used, DC blocking capacitors are not
required on RF Ports and Ground.
V 2.00
V2
V1
39 pF
RF2
GND
RF1
5
4
1
2
3
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