Data Sheet

AD9683

Rev. D | Page 33 of 44

SPI ACCESSIBLE FEATURES

Table 16 provides a brief description of the general features that are accessible via the SPI. These features are described in detail in the

AN-877 Application Note, Interfacing to High Speed ADCs via SPI. The AD9683 part-specific features are described in the Memory Map

Register Descriptions section.

Table 16. Features Accessible Using the SPI

Feature Name

Description

Mode

Allows the user to set either power-down mode or standby mode

Clock

Allows the user to access the DCS via the SPI

Offset

Allows the user to digitally adjust the converter offset

Test Input/Output

Allows the user to set test modes to have known data on output bits

Output Mode

Allows the user to set up outputs

Output Phase

Allows the user to set the output clock polarity

Output Delay

Allows the user to vary the DCO delay

VREF

Allows the user to set the reference voltage

DON’T CARE

DON’T CARE

DON’T CARE

DON’T CARE

SDIO

SCLK

CS

R/W

W1

W0

A12

A11

A10

A9

A8

A7

D5

D4

D3

D2

D1

D0

Figure 67. Serial Port Interface Timing Diagram