Datasheet

AD9125
Rev. 0 | Page 27 of 56
Register
Name
Address
(Hex) Bits Name Description Default
I Aux DAC Control 0x43 7 I aux DAC sign
0 = the auxiliary DAC I sign is positive, and the current is
directed to the IOUT1P pin (Pin 67).
0
1 = the auxiliary DAC I sign is negative, and the current
is directed to the IOUT1N pin (Pin 66).
6
I aux DAC current
direction
0 = the auxiliary DAC I sources current. 0
1 = the auxiliary DAC I sinks current.
5 I aux DAC sleep I channel auxiliary DAC sleep. 0
[1:0] I Aux DAC[9:8] See Register 0x42. 0
Q DAC FS Adjust 0x44 [7:0] Q DAC FS adjust[7:0]
Q DAC FS adjust[9:0] sets the full-scale current of the
I DAC. The full-scale current can be adjusted from 8.64 mA
to 31.6 mA in step sizes of approximately 22.5 μA.
F9
0x000 = 8.64 mA.
…
0x200 = 20.14 mA.
…
0x3FF = 31.66 mA.
Q DAC Control 0x45 7 Q DAC sleep
1 = puts the Q-channel DAC into sleep mode (fast wake-
up mode).
0
[1:0] Q DAC FS adjust[9:8] See Register 0x44. 1
Aux DAC Q Data 0x46 [7:0]
Q aux DAC[7:0] Q aux DAC[9:0] sets the magnitude of the aux DAC current.
The range is 0 mA to 2 mA, and the step size is 2 μA.
0
0x000 = 0.000 mA.
0x001 = 0.002 mA.
…
0x3FF = 2.046 mA.
Q Aux DAC Control 0x47 7 Q aux DAC sign
0 = the auxiliary DAC Q sign is positive, and the current
is directed to the IOUT2P pin (Pin 58).
0
1 = the auxiliary DAC Q sign is negative, and the current
is directed to the IOUT2N pin (Pin 59).
6
Q aux DAC current
direction
0 = the auxiliary DAC Q sources current. 0
1 = the auxiliary DAC Q sinks current.
5 Q aux DAC sleep Q-channel auxiliary DAC sleep 0
[1:0] Q aux DAC[9:8] See Register 0x46. 0
Die Temp Range
Control
0x48 [6:4] FS current[2:0] Auxiliary ADC full-scale current. 0
000 = lowest current.
…
111 = highest current.
[3:1] Reference current[2:0] Auxiliary ADC reference current. 1
000 = lowest current.
111 = highest current.
0 Capacitor value Auxiliary ADC internal capacitor value. 0
0 = 5 pF.
1 = 10 pF.
Die Temp LSB 0x49 [7:0] Die temp[7:0]
Die Temp[15:0] indicates the approximate die
temperature.
R
0xADCC = −39.9°C.
0xC422 = 25.1°C.
…
0xD8A8 = 84.8°C (see the Temperature Sensor section for
details).
Die Temp MSB 0x4A [7:0] Die temp[15:8] See Register 0x49. R