AD9146 Analog Devices, AD9146 Datasheet - Page 24

• Manufacturer Part Number: AD9146
• Description: Dual, 16-Bit, 1230 MSPS, TxDAC+® Digital-to-Analog Converter
• Manufacturer: Analog Devices

Specifications of AD9146

• 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: Byte,LVDS,Nibble

AD9146
Register
Name
FIFO Control
FIFO Status
Datapath
Control
HB1 Control
HB2 Control
Address
(Hex)
0x17
0x18
0x19
0x1B
0x1C
0x1D
Bits
[2:0]
7
6
2
1
[7:0]
7
6
5
2
1
0
[2:1]
0
[6:1]
0
Name
FIFO Phase Offset[2:0]
FIFO Warning 1
FIFO Warning 2
FIFO soft align
acknowledge
FIFO soft align request
FIFO Level[7:0]
Bypass premod
Bypass sinc
Set to 1
Bypass phase
compensation
and dc offset
Select sideband
Send I data to Q data
HB1[1:0]
Bypass HB1
HB2[5:0]
Bypass HB2
−1
Rev. A | Page 24 of 56
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).
1 = FIFO read and write pointers are within ±1.
Description
000 = 0.
001 = 1.
…
111 = 7.
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 f
1 = bypass the inverse sinc filter.
Set this bit to 1 for proper operation.
1 = bypass phase compensation and dc offset.
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 f
01 = input signal not modulated; filter pass band is from
0.1 to 0.9 of f
10 = input signal modulated by f
0.6 to 1.4 of f
11 = input signal modulated by f
1.1 to 1.9 of f
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 f
001001 = input signal not modulated; filter pass band is
from 0.0 to 0.5 of f
010010 = input signal not modulated; filter pass band is
from 0.25 to 0.75 of f
011011 = input signal not modulated; filter pass band is
from 0.5 to 1.0 of f
100100 = input signal modulated by f
from 0.75 to 1.25 of f
101101 = input signal modulated by f
from 1.0 to 1.5 of f
110110 = input signal modulated by f
from 1.25 to 1.75 of f
111111 = input signal modulated by f
from 1.5 to 2.0 of f
1 = bypass the second-stage interpolation filter.
IN1
IN1
IN1
.
.
.
S
IN1
/2 premodulator.
.
IN2
IN2
IN2
IN2
.
.
.
.
IN2
IN2
IN2
.
.
.
IN2
.
IN1
IN1
; filter pass band is from
; filter pass band is from
IN2
IN2
IN2
IN2
; filter pass band is
; filter pass band is
; filter pass band is
; filter pass band is
Data Sheet
Default
100
N/A
N/A
N/A
0
N/A
1
1
1
1
0
0
00
0
000000
0