HMC540LP3 Datasheet, PDF (3/6 Pages) Hittite Microwave Corporation – 1 dB LSB GaAs MMIC 4-BIT DIG POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz

HMC540LP3 / 540LP3E
v00.0605
1 dB LSB GaAs MMIC 4-BIT DIGITAL
POSITIVE CONTROL ATTENUATOR, DC - 5.5 GHz
Worst Case Step Error
Between Successive Attenuation States
6
0.4
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
FREQUENCY (GHz)
Bias Voltage & Current
Vdd = +5.0 Vdc ± 10%
Vdd
(VDC)
Idd (Typ.)
(mA)
+4.5
3.0
+5.0
3.2
+5.5
3.4
Control Voltage
State
Low
High
Note: Vdd = +5V
Bias Condition
0 to +0.8V @ -5 uA Typ.
+2.0 to + 5.0 Vdc @ 40 uA Typ.
Truth Table
V1
8 dB
Control Voltage Input
V2
4 dB
V3
2 dB
V4
1 dB
Attenuation
State
RF1 - RF2
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.
6 - 172
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