AD9122 Analog Devices, AD9122 Datasheet - Page 30

• Manufacturer Part Number: AD9122
• Manufacturer: Analog Devices

Specifications of AD9122

• Resolution (bits): 16bit
• Dac Update Rate: 1.23GSPS
• Dac Settling Time: n/a
• Max Pos Supply (v): +3.47V
• Single-supply: No
• Dac Type: Current Out
• Dac Input Format: LVDS,Par

AD9122
Register
Name
Q Aux DAC
Control
Die Temp
Range
Control
Die Temp
LSB
Die Temp
MSB
SED Control
Compare
I0 LSBs
Compare
I0 MSBs
Compare
Q0 LSBs
Compare
Q0 MSBs
Compare
I1 LSBs
Compare
I1 MSBs
Address
(Hex)
0x47
0x48
0x49
0x4A
0x67
0x68
0x69
0x6A
0x6B
0x6C
0x6D
Bits
7
6
5
[1:0]
[6:4]
[3:1]
0
[7:0]
[7:0]
7
5
3
1
0
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
[7:0]
Name
Q aux DAC sign
Q aux DAC current
direction
Q aux DAC sleep
Q Aux DAC[9:8]
FS Current[2:0]
Reference Current[2:0]
Capacitor value
Die Temp[7:0]
Die Temp[15:8]
SED compare enable
Sample error detected
Autoclear enable
Compare fail
Compare pass
Compare Value I0[7:0]
Compare Value I0[15:8]
Compare Value Q0[7:0]
Compare Value Q0[15:8]
Compare Value I1[7:0]
Compare Value I1[15:8]
Rev. B | Page 30 of 60
0 = the Q auxiliary DAC sign is positive, and the current is
directed to the IOUT2P pin (Pin 58).
1 = the Q auxiliary DAC sign is negative, and the current is
directed to the IOUT2N pin (Pin 59).
0 = the Q auxiliary DAC sources current.
1 = the Q auxiliary DAC sinks current.
1 = puts the Q auxiliary DAC into sleep mode.
Q Aux DAC[9:0] sets the magnitude of the auxiliary DAC
current. The range is 0 mA to 2 mA, and the step size is 2 μA.
0x000 = 0.000 mA.
0x001 = 0.002 mA.
…
0x3FF = 2.046 mA.
Auxiliary ADC full-scale current.
000 = lowest current.
…
111 = highest current.
Auxiliary ADC reference current.
000 = lowest current.
…
111 = highest current.
Auxiliary ADC internal capacitor value.
0 = 5 pF.
1 = 10 pF.
See Register 0x4A.
Die Temp[15:0] indicates the approximate die temperature.
For more information, see the Temperature Sensor section.
1 = enable the SED circuitry. None of the flags in this register
or the values in Register 0x70 through Register 0x73 are
significant if the SED is not enabled.
1 = indicates an error was detected. The bit remains set until
cleared. Any write to this register clears this bit to 0.
1 = enable autoclear mode. This activates Bit 1 and Bit 0 of
this register and causes Register 0x70 through Register 0x73
to be autocleared when eight consecutive sample data sets
are received error free.
1 = indicates an error was detected. This bit remains set until
it is autocleared by the reception of eight consecutive error-
free comparisons or is cleared by a write to this register.
1 = indicates that the last sample comparison was error free.
See Register 0x69.
Compare Value I0[15:0] is the word that is compared with
the I0 input sample captured at the input interface.
See Register 0x6B.
Compare Value Q0[15:0] is the word that is compared with
the Q0 input sample captured at the input interface.
See Register 0x6D.
Compare Value I1[15:0] is the word that is compared
with the I1 input sample captured at the input interface.
Description
Default
0
0
0
00
000
001
0
N/A
N/A
0
0
0
0
0
10110110
01111010
01000101
11101010
00010110
00011010