ADA4356ABCZ datasheet(52/61 Pages) AD

52 / 61 page

Data Sheet

ADA4356

analog.com

Rev. 0

52 of 61

REG.

(HEX)

NAME

BIT 7

(MSB)

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

(LSB)

DEFAULT

VALUE

(HEX)

COMMENTS

first or LSB-

first mode.

0x01

Chip ID

(global)

8-bit chip ID, Bits[7:0], ADA4356

0x8B

Unique chip

ID used to

differentiate

devices;

read only.

DEVICE INDEX and TRANSFER REGISTERS

0x05

Device index

Open

Clock

channel

DCO

Clock

channel

FCO

Open

01 = data channel

enabled,

00 = data channel

disabled,

Bit 1 only used

after start-up or

power cycle, see

the ADC SPI Start-

Up Sequence

section

0x33

Bits are set

determine

which

channels

receive the

next write

command.

Bit 1 is only

used after

start-up or

power cycle.

0xFF

Transfer

Open

Initiate

override

0x00

Set

resolution/

sample rate

override.

GLOBAL ADC FUNCTION REGISTERS

0x08

ADC power

modes (global)

Open

Power mode:

00 = chip run,

01 = full power-

down,

10 = standby,

11 = reset

0x00

Determines

various

generic

modes of

chip

operation.

0x09

Clock (global)

Open

DCS:

0 = off,

1 = on

0x00

Turns DCS

on or off.

0x0B

Clock divide

(global)

Open

Clock divide ratio[2:0]:

000 = divide by 1

001 = divide by 2

010 = divide by 3

011 = divide by 4

100 = divide by 5

101 = divide by 6

110 = divide by 7

111 = divide by 8

0x00

Not

applicable.

0x0D

Test mode

(local except

for PN

sequence

resets)

User input test

mode:

00 = single,

01 = alternate,

10 = single once,

11 = alternate

once (affects

user input test

mode only,

Bits[3:0] = 1000)

Reset PN

long gen

Reset

short

gen

Output test mode, Bits[3:0] (local):

0000 = off (default),

0001 = midscale short,

0010 = positive full-scale,

0011 = negative full-scale,

0100 = alternating checkerboard,

0101 = PN23 sequence,

0110 = PN9 sequence,

0111 = one-/zero-word toggle,

1000 = user input,

1001 = 1-/0-bit toggle,

1010 = 1× sync,

1011 = one bit high,

1100 = mixed bit frequency

0x00

When set,

the test data

is placed on

the output

balls in

place of

normal

data.

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