User Guide

EVAL-AD74413R-DIOZ

EVALUATION BOARD HARDWARE

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Rev. 0 | 3 of 9

POWER SUPPLY

The EVAL-AD74413R-DIOZ comes with a single power supply

connector (P6) that directly powers the AVDD pin of the AD74413R

and the VDD and VDDx pins of the MAX14906.

The EVAL-AD74413R-DIOZ supply powers an on-board DC-to-DC

converter (MAX17552, (U4)) that generates a 5 V supply. This 5 V

supplies the DVCC and IOVDD pins of the AD74413R as well as

the VL and the V5V pins of the MAX14906.

Figure 2 shows a simplified drawing of the power connections on

the EVAL-AD74413R-DIOZ.

Figure 2. EVAL-AD74413R-DIOZ Simplified Power Diagram

OUTPUT CHANNELS

The AD74413R and the MAX14906 have four channels each (see

the AD74413R and MAX14906 data sheets for more information).

Each of the channels in the AD74413R is connected to the respec-

tive channel of the MAX14906. For example, Channel A of the

AD74413R is connected to Channel 1 of the MAX14906 and so on.

There are four terminal connectors on the EVAL-AD74413R-DIOZ,

P1, P2, P3, and P4, that connect the desired loads to the four

output channels.

SERIAL PERIPHERAL INTERFACE (SPI)

COMMUNICATION

The USB2PMB2 handles the communication to the EVAL-

AD74413R-DIOZ board via the PC. The USB2PMB2 board also

transmits an OR combination of the ALERT signal of the AD74413R

and the FAULT signal of the MAX14906 to the PC so the graphical

user interface (GUI) can monitor any of the interrupts and diagnos-

tics that the AD74413R and the MAX14906 provide.

TEST POINTS

The EVAL-AD74413R-DIOZ has test points for the SPI signals, the

alert signal, to measure the AVDD, AVSS, and AGND rails, and to

provide debug access to the 4-channel screw terminals.