参数资料
型号: HMC291
厂商: HITTITE MICROWAVE CORP
元件分类: 衰减器
英文描述: 700 MHz - 4000 MHz RF/MICROWAVE VARIABLE ATTENUATOR, 1.6 dB INSERTION LOSS-MAX
封装: PLASTIC, SOT-26, 6 PIN
文件页数: 3/6页
文件大小: 230K
代理商: HMC291
MICROWAVE CORPORATION
2 - 68
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Visit us at www.hittite.com, or Email at sales@hittite.com
A
TTENU
A
T
ORS
-
SMT
2
4 dB LSB GaAs MMIC 2-BIT DIGITAL
ATTENUATOR, 0.7 - 4.0 GHz
HMC291
v01.0402
Control & Bias Voltages
Truth Table
Application Circuit
DC blocking capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 ~ 300 pF to allow lowest customer specic
frequency to pass with minimal loss. R1 = 5K Ohm is required to supply voltage to the circuit throught either PIN 3 or PIN 1.
8 dB
4
5
1
2
5k Ohm
3
4 dB
PIN NUMBER
100 pF
RF2
R1
C2
100 pF
RF1
C1
V2
N/C
6
V1
GND
Vdd
Control Voltage Input
Attenuation
Setting
RF1 - RF2
V1
8 dB
V2
4 dB
High
Reference I.L.
High
Low
4 dB
Low
High
8 dB
Low
12 dB
Max. Atten.
Any combination of the above states will provide an
attenuation approximately equal to the sum of the bits selected.
State
Bias Condition
Low
0 to +0.2V @ 20 uA Max.
High
Vdd ± 0.2V @ 50 uA Max.
Note: Vdd= +3V to 5V ± 0.2V
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