AD9694 datasheet(82/101 Pages) AD

82 / 101 page

AD9694

Data Sheet

Rev. 0 | Page 82 of 101

Addr

Name

Bits

Bit Name

Settings Description

Reset Access

0x0201

Pair map chip

decimation

ratio

[7:3]

Reserved

Reserved.

0x0

[2:0]

Chip decimation ratio

select

Chip decimation ratio.

0x0

R/W

000

Decimate by 1 (full sample rate).

001

Decimate by 2.

010

Decimate by 4.

011

Decimate by 8.

100

Decimate by 16.

0x0228

Channel map

custom offset

[7:0]

Offset adjust in LSBs

from +127 to −128

Digital data path offset. Twos complement

offset adjustment aligned with least significant

converter resolution bit

0x0

R/W

0x0245

Channel map

fast detect

control

[7:4]

Reserved

Reserved.

0x0

Force

FD_A/FD_B/FD_C/FD_D

pins

0x0

R/W

Normal operation of fast detect pin.

Force a value on fast detect pin (see Bit 2)

Force value of

FD_A/FD_B/FD_C/FD_D

pins if force pins is true,

this value is output on

FD_x pins

The fast detect output pin for this channel is

set to this value when the output is forced.

0x0

R/W

Reserved

Reserved.

0x0

Enable fast detect

output

0x0

R/W

Fine fast detect disabled.

Fine fast detect enabled.

0x0247

Channel map

fast detect

upper

threshold LSB

[7:0]

Fast detect upper

threshold, Bits[7:0]

LSBs of fast detect upper threshold. 8 LSBS of

the programmable 13-bit upper threshold that

is compared to the fine ADC magnitude.

0x0

R/W

0x0248

Channel map

fast detect

upper

threshold

MSB

[7:5]

Reserved

Reserved.

0x0

[4:0]

Fast detect upper

threshold, Bits[12:8]

LSBs of fast detect upper threshold. 8 LSBS of

the programmable 13-bit upper threshold that

is compared to the fine ADC magnitude.

0x0

R/W

0x0249

Channel map

fast detect

lower

threshold LSB

[7:0]

Fast detect lower

threshold, Bits[7:0]

LSBs of fast detect lower threshold. 8 LSBS of

the programmable 13-bit lower threshold that

is compared to the fine ADC magnitude.

0x0

R/W

0x024A

Channel map

fast detect

lower

threshold

MSB

[7:5]

Reserved

Reserved.

0x0

[4:0]

Fast detect lower

threshold, Bits[12:8]

LSBs of fast detect lower threshold.

8 LSBS of the programmable 13-bit lower

threshold that is compared to the fine ADC

magnitude.

0x0

R/W

0x024B

Channel map

fast detect

dwell time

LSB

[7:0]

Fast detect dwell time,

Bits[7:0]

LSBs of fast detect dwell time counter target.

This is a load value for a 16-bit counter that

determines how long the ADC data must

remain below the lower threshold before the

FDDx pins are reset to 0.

0x0

R/W

AD9694 Datasheet(PDF) 82 Page - Analog Devices

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