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For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Truth Table
Control Voltage
Bias Voltage & Current
Worst Case Step Error
Between Successive Attenuation States
Vdd = +5.0 Vdc ?10%
Vdd
(VDC)
Idd (Typ.)
(mA)
+4.5
3.0
+5.0
3.2
+5.5
3.4
State
Bias Condition
Low
0 to +0.8V @ -5 uA Typ.
High
+2.0 to + 5.0 Vdc @ 40 uA Typ.
Note: Vdd = +5V
Control Voltage Input
Attenuation
State
RF1 - RF2
V1
8 dB
V2
4 dB
V3
2 dB
V4
1 dB
High
High
High
High
Reference
I.L.
High
High
High
Low
1 dB
High
High
Low
High
2 dB
High
Low
High
High
4 dB
Low
High
High
High
8 dB
Low
Low
Low
Low
15 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0
1
2
3
4
5
6
FREQUENCY (GHz)
HMC540LP3 / 540LP3E
1 dB LSB GaAs MMIC 4-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz
v00.0605
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