AD9739A Datasheet, PDF (27/44 Pages) Analog Devices – 14-Bit, 2.5 GSPS, RF Digital-to-Analog Converter

AD9739A
Address
(Hex)
0x27
0x28
0x29
0x2A
Part ID
0x35
Name
Gain[1:0]
Enable
MUDEL[0]
SRCH_MODE[1:0]
SET_PHS[4:0]
MUDEL[8:1]
SEARCH_TOL
Retry
CONTRST
Guard[4:0]
MU_LST
MU_LKD
PART_ID
Default
Bit R/W Setting Comments
[2:1] R/W 01
Sets the Mu controller tracking gain.
Recommended to leave at the default 01 setting.
0 R/W 0
0 = enable the Mu controller.
1 = disable the Mu controller.
7 R/W 0
The LSB of the 9-bit MUDEL setting.
[6:5] R/W 0
[4:0] R/W 0
[7:0] W 0x00
R 0x00
7 R/W 0
6 R/W 0
5 R/W 0
5 R/W 01011
1R0
0R0
Sets the direction in which the Mu controller searches (from its initial MUDEL setting)
for the optimum Mu delay line setting that corresponds to the desired phase/slope
setting (that is, SET_PHS and slope ).
00 = down.
01 = up.
10 = down/up (recommended).
Sets the target phase that the Mu controller locks to with a maximum setting of 16.
A setting of 4 (that is, 00100) is recommended for optimum ac performance.
With enable (Bit 0, Register 0x26) set to 0, this 9-bit value represents the value
that the Mu delay is set to. Note that the maximum value is 432.
With enable set to 1, this value represents the Mu delay value at which the
controller begins its search. Setting this value to the delay line midpoint of 216 is
recommended.
When read (Bit 3, Register 0x26) is set to 1, the value read back is equal to the
value written into the register when enable = 0 or the value that the Mu
controller locks to when enable = 1.
0 = not exact (can find a phase within two values of the desired phase).
1 = finds the exact phase that is targeted (optimal setting).
0 = stop the search if the correct value is not found,
1 = retry the search if the correct value is not found.
Controls whether the controller resets or continues when it does not find the
desired phase.
0 = continue (optimal setting), 1 = reset.
Sets a guard band from the beginning and end of the mu delay line which the
Mu controller does not enter into unless it does not find a valid phase outside
the guard band (optimal value is Decimal 11 or 0x0B).
0 = Mu controller has not lost lock.
1 = Mu controller has lost lock.
0 = Mu controller is not locked.
1= Mu controller is locked.
[7:0] R 0x24
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