AD9239 datasheet(35/40 Pages) AD

35 / 40 page

AD9239

Rev. 0 | Page 35 of

Addr.

(Hex)

Name

(MSB)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

(LSB)

Bit 0

Default

Value

(Hex)

Default

Notes/

Comments

adc_input

(local)

Analog

disconnect

enable

1 = on

0 = off

(default)

VCM

enable

1 = on

0 = off

(default)

0x00

offset

(local)

6-bit Device Offset Adjustment[5:0]

011111 = +31 LSB

011110 = +30 LSB

011101 = +29 LSB

…

000010 = +2 LSB

000001 = +1 LSB

000000 = 0 LSB

111111 = −1 LSB

111110 = −2 LSB

111101 = −3 LSB

…

100001 = −31 LSB

100000 = −32 LSB

0x00

Device

offset

trim.

output_mode

(local/global)

Output

enable bar

(local)

1 = off

0 = on

(default)

Output

invert

(global)

enable

1 = on

0 = off

(default)

Data format select

(global)

00 = offset binary

(default)

01 = twos

complement

10 = gray code

0x00

Configures

the outputs

and the

format of

the data.

output_adjust

(global)

Output Drive

Current[1:0]

00 = 400 mV

(default)

01 = 500 mV

10 = 440 mV

11 = 320 mV

0x00

VCM output

adjustments.

vref

(global)

Ref_Vfs[4:0]

Reference full-scale adjust

10000 = 1.14 V p-p FS

10001 = 1.1575 V p-p FS

10010 = 1.175 V p-p FS

10011 = 1.1925 V p-p FS

…

11111 = 1.4025 V p-p FS

00000 = 1.42 V p-p FS

00001 = 1.4375 V p-p FS

…

01110 = 1.6825 V p-p FS

01111 = 1.7 V p-p FS

00h

Select

adjustments

for VREF.

user_

patt1_lsb

(local)

0xAA

User-defined

pattern,

1 LSB.

user_

patt1_msb

(local)

B15

B14

B13

B12

B11

B10

0xAA

User-defined

pattern,

1 MSB

user_

patt2_lsb

(local)

0xAA

User-defined

pattern,

2 LSB

user_

patt2_msb

(local)

B15

B14

B13

B12

B11

B10

0xAA

User-defined

pattern,

2 MSB

user_

patt3_lsb

(local)

0xAA

User-defined

pattern,

3 LSB

user_

patt3_msb

(local)

B15

B14

B13

B12

B11

B10

0xAA

User-defined

pattern,

3 MSB

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