HMC1055

Data Sheet

Rev. A | Page 8 of 10

THEORY OF OPERATION

The HMC1055 requires a single-supply voltage applied to the

line to minimize RF coupling.

The HMC1055 is controlled via a single digital control voltage

set to the on state, by which an insertion loss path is provided

the off state, by which RF2 is isolated from RF1 and terminated

to 50 Ω, whereas RF1 becomes reflective open (see Table 4).

The HMC1055 is internally matched to 50 Ω at the RF1 and

RF2 pins; therefore, no external matching components are

required. The RF1 and RF2 pins are dc-coupled, and dc

blocking capacitors are required on the RF lines.

Table 4. Truth Table

Supply Voltage

(V

Control Voltage

(V

1

Switch Mode

(RF1 to RF2)

3 V

0 V

Off

3 V

On

5 V

0 V

Off

5 V

On