Datasheet

AD9484
Rev. A | Page 22 of 24
Addr.
(Hex)
Register Name
Bit 7
(MSB)
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
Bit 0
(LSB)
Default
Value
(Hex)
Default Notes/
Comments
18 FLEX_VREF VREF select
00 = internal V
REF
(20 kΩ pull-down)
01 = import V
REF
(0.59 V to 0.8 V on
VREF pin)
10 = export V
REF
(from internal
reference)
11 = not used
0 Input voltage range setting:
11100 = 1.60
11101 = 1.58
11110 = 1.55
11111 = 1.52
00000 = 1.50
00001 = 1.47
00010 = 1.44
00011 = 1.42
00100 = 1.39
00101 = 1.36
00110 = 1.34
00111 = 1.31
01000 = 1.28
01001 = 1.26
01010 = 1.23
01011= 1.20
01011= 1.18
0x00
19 USER_PATT1_LSB
B7 B6 B5 B4 B3 B2 B1 B0
0x00 User-defined
pattern, 1 LSB.
1A USER_PATT1_MSB
B7 B6 B5 B4 B3 B2 B1 B0
0x00 User-defined
pattern, 1 MSB.
1B USER_PATT2_LSB
B7 B6 B5 B4 B3 B2 B1 B0
0x00 User-defined
pattern, 2 LSBs.
1C USER_PATT2_MSB
B7 B6 B5 B4 B3 B2 B1 B0
0x00 User-defined
pattern, 2 MSBs.
2A OVR_CONFIG 0 0 0 0 0 0 0 OR±
enable:
1 = on
(default)
0 = off
0x01
2C Input coupling 0 0 0 0 0 DC
coupling
enable
0 0 0x00 Default is
ac coupling.
1
X = don’t care.