Register 0x0200—hstl driver, Register 0x0201—cmos driver, Register 0x0400 to register 0x040a—reserved – Analog Devices AD9912 User Manual
Page 36: Register 0x040b—dac full-scale current, Register 0x040c—dac full-scale current (continued), Register 0x040d to register 0x0410—reserved, Register 0x0500—spur a, Register 0x0501—spur a (continued), Ad9912

AD9912
Rev. D | Page 36 of 40
DOUBLER AND OUTPUT DRIVERS (REGISTER 0x0200 TO REGISTER 0x0201)
Register 0x0200—HSTL Driver
Table 32.
Bits
Bit Name
Description
4
OPOL
Output polarity. Setting this bit inverts the HSTL driver output polarity.
[3:2]
Reserved
Reserved.
[1:0]
HSTL output doubler
HSTL output doubler.
01 = doubler disabled.
10 = doubler enabled. When using doubler, Bit 5 in Register 0x0010 must also be set to 1.
Register 0x0201—CMOS Driver
Table 33.
Bits
Bit Name
Description
0
CMOS mux
This bit allows the user to select whether the CMOS driver output is divided by the S-divider.
0 = S-divider input sent to CMOS driver.
1 = S-divider output sent to CMOS driver. See Figure 39.
CALIBRATION (USER-ACCESSIBLE TRIM) (REGISTER 0x0400 TO REGISTER 0x0410)
Register 0x0400 to Register 0x040A—Reserved
Register 0x040B—DAC Full-Scale Current
Table 34.
Bits
Bit Name
Description
[7:0]
DAC full-scale current
DAC full-scale current, Bits[7:0]. See the Digital-to-Analog (DAC) Output section.
Register 0x040C—DAC Full-Scale Current (Continued)
Table 35.
Bits
Bit Name
Description
[9:8]
DAC full-scale current
DAC full-scale current, Bits[9:8]. See Register 0x040B.
Register 0x040D to Register 0x0410—Reserved
HARMONIC SPUR REDUCTION (REGISTER 0x0500 TO REGISTER 0x0509)
See the Harmonic Spur Reduction section.
Register 0x0500—Spur A
Table 36.
Bits
Bit Name
Description
7
HSR-A enable
Harmonic Spur Reduction A enable.
6
Amplitude gain × 2
Setting this bit doubles the gain of the cancelling circuit and also doubles the minimum step size.
[5:4]
Reserved
Reserved.
[3:0]
Spur A harmonic
Spur A Harmonic 1 to Spur A Harmonic 15. Allows user to choose which harmonic to eliminate.
Register 0x0501—Spur A (Continued)
Table 37.
Bits
Bit Name
Description
[7:0]
Spur A magnitude
Linear multiplier for Spur A magnitude.