Datasheet

Data Sheet AD9148
Rev. B | Page 33 of 72
Register Name
Addr
(Hex) Bit Name Function Default
Coeff I Byte 0 20 7 0 Set this bit to 0. 0
6:3 Coeff_1i[3:0]
I-Path DAC Sinc
-1
Filter Coefficient 2 in twos complement
format.
0
2:0 Coeff_0i
I-Path DAC Sinc
-1
Filter Coefficient 1 in twos complement
format.
0
Set DAC SPI select = 0 to configure DAC 1 path.
Set DAC SPI select = 1 to configure DAC 3 path.
Coeff I Byte 1
21
7:5
Coeff_3i[2:0]
I-Path DAC Sinc
-1
Filter Coefficient 4 (LSB) in twos
complement format.
6
4:0 Coeff_2i
I-Path DAC Sinc
-1
Filter Coefficient 3 in twos complement
format.
0
Set DAC SPI select = 0 to configure DAC 1 path.
Set DAC SPI select = 1 to configure DAC 3 path.
Coeff I Byte 2 22 7:5 Coeff_4i[2:0]
I-Path DAC Sinc
-1
Filter Coefficient 5 (LSB) in twos
complement format.
7
4 0 Set this bit to 0. 0
3:0 Coeff_3i[6:3]
Set I-Path DAC Sinc
-1
Filter Coefficient 4 (MSB) in twos
complement format.
F
DAC SPI select = 0 to configure DAC 1 path.
Set DAC SPI select = 1 to configure DAC 3 path.
Coeff I Byte 3 23 7 0 Set this bit to 0. 0
6:0 Coeff_4i[9:3]
I-Path DAC Sinc
-1
Filter Coefficient 5 (MSB) in twos
complement format.
7F
Set DAC SPI select = 0 to configure DAC 1 path.
Set DAC SPI select = 1 to configure DAC 3 path.
Coeff Q Byte 0 24 7 0 Set this bit to 0. 0
6:3 Coeff_1q[3:0]
Q-Path DAC Sinc
-1
Filter Coefficient 2 in twos complement
format.
D
2:0 Coeff_0q
Q-Path DAC Sinc
-1
Filter Coefficient 1 in twos complement
format.
1
Set DAC SPI select = 0 to configure DAC 2 path.
Set DAC SPI select = 1 to configure DAC 4 path.
Coeff Q Byte 1 25 7:5 Coeff_3q[2:0]
Q-Path DAC Sinc
-1
Filter Coefficient 4 (LSB) in twos
complement format.
7
4:0 Coeff_2q
Q-Path DAC Sinc
-1
Filter Coefficient 3 in twos complement
format.
6
Set DAC SPI select = 0 to configure DAC 2 path.
Set DAC SPI select = 1 to configure DAC 4 path.