F6922 Datasheet

R35DS0003EU0100

Rev.1.0

Jun 25, 2021

Page 7

3.

Typical Application Circuit

Figure 3 shows two typical application circuits for biasing the F6922.

The top circuit uses a voltage source Vref to supply the bias reference current Iref through an external resistor

Rref. Vref should be set to achieve the recommended Iref bias currents per the indicated formula. For the typical

relationship between Viref and Iref, see Figure 13.

The bottom circuit uses the programmable IDAC of the Renesas F61xx beamforming device to provide the

reference current directly to the F6922.

Figure 3. Typical Application Circuits