Datasheet

AD9233
Rev. A | Page 26 of 44
Addr
(Hex)
Parameter
Name
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
(LSB)
Default
Value
(Hex)
Default
Notes/
Comments
0D test_io PN23
0 =
Normal
1 =
Reset
PN9
0 =
Normal
1 =
Reset
Global Output Test Options
000—Off
001—Midscale Short
010— +FS Short
011— −FS Short
100—Checker Board Output
101—PN 23 Sequence
110—PN 9
111—One/Zero Word Toggle
0x00 See the
Interfacing to
High Speed
ADCs via SPI
User Manual
.
14 output_mode Output Driver
Configuration
00 for DRVDD = 3.3 V
10 for DRVDD = 1.8 V
Open Output
Disable
1—
Disabled
0—
Enabled
1
Open Output
Data
Invert
1 =
Invert
Data Format Select
00—Offset Binary
(Default)
01—Twos
Complement
10—Gray Code
0x00 Configures the
outputs and
the format of
the data and
the output
driver
strength.
16 output_phase DCO
Polarity
1 = Inverted
0 = Normal
Open Open Open Open Open Open Open 0x00 See
SPI-
Accessible
Features
section.
18 VREF Internal Reference
Resistor Divider
00—VREF = 1.25 V
01—VREF = 1.5 V
10—VREF = 1.75 V
11—VREF = 2.00 V
Open Open Open Open Open Open 0xC0 See
SPI-
Accessible
Features
section.
1
External Output Enable (OEB) pin must be high.