DC–28 GHz GaAs MMIC Distributed Amplifier

20

4.4 Assembly Drawing

The following figure shows the assembly diagram of the MMA040AA device. In the die test assembly

shown, both RFIN and RFOUT ports should utilize bias tees or DC blocks to isolate external circuits

from the IC. VDD to the MMA040AA die is supplied through DC bypass caps of >10 nF (the actual

value depends on the low-frequency bandwidth requirements of the application).

Figure 20 Assembly Diagram

Table 5 Bias Sequence

Bias Sequence

1)

Set the gate voltage VG1 to -1V

2)

Set drain voltage VDD to 8V

3)

Adjust the gate voltage until the drain current is 60mA