© 2018 Integrated Device Technology, Inc.

12

Rev O May 11, 2018

F1421 Datasheet

Evaluation Kit Operation

Power Supply Setup

Set up a power supply in the voltage range of 3.0V to 5.25V with the power supply output disabled. The voltage can be applied via one of the

following connections (see Figure 18):



J3 connector



J4 header connection (GND is the pin farthest away from the J4 label)

Figure 18. Power Supply Connections

Standby (STBY) Pin

The Evaluation Board has the ability to control the F1421 for standby operation. The logic voltage is applied to the J5 header connection as

shown in Figure 19.

To place the amplifier in the active mode (on) use one of these options:



Make no connections on J5



Apply a logic LOW signal to STBY (pin 2 of J5 or the middle pin).



Make a connection between pin 3 (GND) and pin 2 (STBY, the middle pin) of J5.

To place the amplifier in the standby mode (off), use one of these options:



Apply a logic HIGH signal to the STBY (pin 2 of J5 or the middle pin).



Make a connection between pin 1 (VCC) and pin 2 (STBY, the middle pin) of J5.

Figure 19. Standby Pin Connection