AD9148BPCZ AD [Analog Devices], AD9148BPCZ Datasheet - Page 30

• Manufacturer Part Number: AD9148BPCZ
• Description: Quad 16-Bit,1 GSPS, TxDAC+ Digital-to-Analog Converter
• Manufacturer: AD [Analog Devices]

AD9148
Register Name
FIFO Status Port A
FIFO status/
Control Port B
FIFO Status Port B
HB1 Control
Addr
(Hex)
18
1A
1C
Bit
7:0
7
6
5
4
3
2:0
7:0
7
6
2:1
0
Name
FIFO Level
FIFO Warning 1
FIFO Warning 2
FIFO reset aligned
FIFO SPI align
acknowledge
FIFO SPI align
requesting
FIFO phase offset
FIFO level
Enable pre mod
Bypass sinc
HB1[1:0]
Bypass HB1
-1
Rev. PrA | Page 30 of 73
FIFO read and write pointers aligned after chip reset.
Function
Thermometer encoded measure of the FIFO level.
FIFO read and write pointers within ±1.
FIFO read and write pointers within ±2.
FIFO read and write pointers aligned after SPI driven FIFO
reset.
Request FIFO read and write pointers alignment via SPI.
FIFO read and write pointer phase offset from optimal
phase following FIFO reset.
000 = 0 offset from optimal phase.
…
111 = 7 offset from optimal phase.
The optimal value is 0.
Thermometer encoded measure of the FIFO Level
Enable f
interpolation filter.
Sinc
Modulation mode for first stage interpolation filter
(f
00 = input signal modulated by dc. Filter pass band is
from −0.2 to +0.2 of f
01 = input signal modulated by dc. Filter pass band is
from 0.05 to 0.45 of f
10 = input signal modulated by f
from 0.3 to 0.7 of f
11 = input signal modulated by f
from 0.55 to 0.95 of f
First stage interpolation filter bypass.
HB1
-1
= 2 × f
filter bypass.
S
/2 modulation stage that precedes Stage 1
IN1
).
HB1
HB1
HB1
.
HB1
.
.
.
Preliminary Technical Data
HB1
HB1
/2. Filter pass band is
/2. Filter pass band is
Default
Read-
only
Read-
only
Read-
only
Read-
only
Read-
only
0
000
Read-
only
0
1
00
0