AD9146 Datasheet, PDF (23/52 Pages) Analog Devices – Dual, 16-Bit, 1230 MSPS, TxDAC+ Digital-to-Analog Converter

AD9146
Register
Name
Address
(Hex) Bits Name
FIFO Control 0x17
[2:0] FIFO Phase Offset[2:0]
FIFO Status 0x18
Datapath
Control
0x19
0x1B
7 FIFO Warning 1
6 FIFO Warning 2
2 FIFO soft align
acknowledge
1 FIFO soft align request
[7:0] FIFO Level[7:0]
7 Bypass premod
6
Bypass sinc^−1
5 Set to 1
2 Bypass phase
compensation
and dc offset
1 Select sideband
HB1 Control 0x1C
0 Send I data to Q data
[2:1] HB1[1:0]
HB2 Control 0x1D
0 Bypass HB1
[6:1] HB2[5:0]
0 Bypass HB2
Description
FIFO write pointer phase offset following FIFO reset. This
is the difference between the read pointer and the write
pointer values upon FIFO reset. The optimal value is
nominally 4 (100).
000 = 0.
001 = 1.
…
111 = 7.
1 = FIFO read and write pointers are within ±1.
1 = FIFO read and write pointers are within ±2.
1 = FIFO read and write pointers are aligned after a serial
port initiated FIFO reset.
1 = request FIFO read and write pointer alignment via the
serial port.
Thermometer encoded measure of the FIFO level.
1 = bypass the fS/2 premodulator.
1 = bypass the inverse sinc filter.
Set this bit to 1 for proper operation.
1 = bypass phase compensation and dc offset.
Default
100
N/A
N/A
N/A
0
N/A
1
1
1
1
0 = the modulator outputs the high-side image.
1 = the modulator outputs the low-side image. The image is
spectrally inverted compared to the input data.
1 = ignore Q data from the interface and disable the clocks
to the Q datapath. Send I data to both the I and Q DACs.
Modulation mode for I Side Half-Band Filter 1.
00 = input signal not modulated; filter pass band is from
−0.4 to +0.4 of fIN1.
01 = input signal not modulated; filter pass band is from
0.1 to 0.9 of fIN1.
10 = input signal modulated by fIN1; filter pass band is from
0.6 to 1.4 of fIN1.
11 = input signal modulated by fIN1; filter pass band is from
1.1 to 1.9 of fIN1.
1 = bypass the first-stage interpolation filter.
Modulation mode for I Side Half-Band Filter 2.
000000 = input signal not modulated; filter pass band is
from −0.25 to +0.25 of fIN2.
001001 = input signal not modulated; filter pass band is
from 0.0 to 0.5 of fIN2.
010010 = input signal not modulated; filter pass band is
from 0.25 to 0.75 of fIN2.
011011 = input signal not modulated; filter pass band is
from 0.5 to 1.0 of fIN2.
100100 = input signal modulated by fIN2; filter pass band is
from 0.75 to 1.25 of fIN2.
101101 = input signal modulated by fIN2; filter pass band is
from 1.0 to 1.5 of fIN2.
110110 = input signal modulated by fIN2; filter pass band is
from 1.25 to 1.75 of fIN2.
111111 = input signal modulated by fIN2; filter pass band is
from 1.5 to 2.0 of fIN2.
1 = bypass the second-stage interpolation filter.
0
0
00
0
000000
0
Rev. 0 | Page 23 of 52