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9 - 94

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9

HMC425LP3

v00.0202

Truth Table

Control Voltage

Bias Voltage & Current

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

123

45

678

9

10

FREQUENCY (GHz)

0.5 dB LSB GaAs MMIC 6-BIT DIGITAL

POSITIVE CONTROL ATTENUATOR, 2.4 - 8.0 GHz

Worst Case Step Error

Between Successive Attenuation States

Vdd Range = 3.0 to +5.0 Vdc

Vdd

(VDC)

Idd (Typ.)

(µA)

+3.0

10

+5.0

30

State

Bias Condition

Low

0 to 0.2V @ 10 uA Typ.

High

Vdd ± 0.2V @ 5 uA Typ.

Note: Vdd = +3V to +5V

Control Voltage Input

Attenuation

State

RF1 - RF2

V1

16 dB

V2

8 dB

V3

4 dB

V4

2 dB

V5

1 dB

V6

0.5 dB

High

High

High

High

High

High

Reference

I.L.

High

High

High

High

High

Low

0.5 dB

High

High

High

High

Low

High

1 dB

High

High

High

Low

High

High

2 dB

High

High

Low

High

High

High

4 dB

High

Low

High

High

High

High

8 dB

Low

High

High

High

High

High

16 dB

Low

Low

Low

Low

Low

Low

31.5 dB

Any combination of the above states will provide an attenuation

approximately equal to the sum of the bits selected.