AD6653-150EBZ Analog Devices Inc, AD6653-150EBZ Datasheet - Page 43

• Manufacturer Part Number: AD6653-150EBZ
• Manufacturer: Analog Devices Inc

Specifications of AD6653-150EBZ

• Lead Free Status / Rohs Status: Compliant

CONFIGURATION WITHOUT THE SPI
In applications that do not interface to the SPI control registers,
the SDIO/DCS pin, the SCLK/DFS pin, the SMI SDO/OEB pin,
and the SMI SCLK/PDWN pin serve as standalone CMOS-
compatible control pins. When the device is powered up, it is
assumed that the user intends to use the pins as static control
lines for the duty cycle stabilizer, output data format, output
enable, and power-down feature control. In this mode, the CSB
chip select should be connected to AVDD, which disables the
serial port interface.
Table 23. Mode Selection
Pin
SDIO/DCS
SCLK/DFS
SMI SDO/OEB
SMI SCLK/PDWN
SCLK
SDIO
CSB
DON’T CARE
DON’T CARE
t
S
R/W
External
Voltage
AVDD (default)
AGND
AVDD
AGND (default)
AVDD
AGND
(default)
AVDD
AGND
(default)
t
DS
W1
W0
t
DH
Configuration
Duty cycle stabilizer enabled
Duty cycle stabilizer disabled
Twos complement enabled
Offset binary enabled
Outputs in high impedance
Outputs enabled
Chip in power-down or
standby
Normal operation
A12
t
HIGH
A11
t
Figure 79. Serial Port Interface Timing Diagram
LOW
A10
A9
Rev. 0 | Page 43 of 80
t
CLK
A8
A7
SPI ACCESSIBLE FEATURES
Table 24 provides a brief description of the general features
that are accessible via the SPI. These features are described in
Application Note AN-877, Interfacing to High Speed ADCs via
SPI (see www.analog.com). The AD6653 part-specific features
are described in the Memory Map Register Description section.
Table 24. Features Accessible Using the SPI
Feature Name
Modes
Clock
Offset
Test I/O
Output Mode
Output Phase
Output Delay
VREF
D5
Allows the user to vary the DCO delay
D4
Description
Allows the user to set either power-down
mode or standby mode
Allows the user to access the DCS via the SPI
Allows the user to digitally adjust the
converter offset
Allows the user to set test modes to have
known data on output bits
Allows the user to set up outputs
Allows the user to set the output clock polarity
Allows the user to set the reference voltage.
D3
D2
D1
D0
t
H
DON’T CARE
AD6653
DON’T CARE